/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-acceleration/phases_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:56:49,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:56:49,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:56:49,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:56:49,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:56:49,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:56:49,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:56:49,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:56:49,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:56:49,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:56:49,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:56:49,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:56:49,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:56:49,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:56:49,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:56:49,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:56:49,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:56:49,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:56:49,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:56:49,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:56:49,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:56:49,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:56:49,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:56:49,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:56:49,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:56:49,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:56:49,329 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:56:49,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:56:49,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:56:49,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:56:49,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:56:49,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:56:49,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:56:49,337 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:56:49,338 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:56:49,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:56:49,341 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:56:49,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:56:49,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:56:49,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:56:49,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:56:49,346 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 14:56:49,403 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:56:49,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:56:49,405 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:56:49,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:56:49,407 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:56:49,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:56:49,407 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:56:49,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:56:49,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:56:49,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:56:49,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:56:49,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:56:49,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:56:49,409 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:56:49,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:56:49,410 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:56:49,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:56:49,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:56:49,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:56:49,411 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:56:49,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:56:49,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:56:49,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:56:49,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:56:49,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:56:49,413 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:56:49,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:56:49,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:56:49,413 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:56:49,413 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:56:49,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:56:49,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:56:49,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:56:49,936 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:56:49,937 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:56:49,939 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_1-2.c [2020-10-28 14:56:50,025 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df873a858/978e0bfcdc0e423eb0ee0f6f029f91f9/FLAG66c5b13e9 [2020-10-28 14:56:50,672 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:56:50,673 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/phases_1-2.c [2020-10-28 14:56:50,680 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df873a858/978e0bfcdc0e423eb0ee0f6f029f91f9/FLAG66c5b13e9 [2020-10-28 14:56:51,053 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df873a858/978e0bfcdc0e423eb0ee0f6f029f91f9 [2020-10-28 14:56:51,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:56:51,067 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:56:51,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:56:51,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:56:51,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:56:51,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:56:51" (1/1) ... [2020-10-28 14:56:51,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5028439f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:51, skipping insertion in model container [2020-10-28 14:56:51,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:56:51" (1/1) ... [2020-10-28 14:56:51,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:56:51,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:56:51,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:56:51,320 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:56:51,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:56:51,354 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:56:51,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:51 WrapperNode [2020-10-28 14:56:51,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:56:51,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:56:51,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:56:51,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:56:51,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:51" (1/1) ... [2020-10-28 14:56:51,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:51" (1/1) ... [2020-10-28 14:56:51,377 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:51" (1/1) ... [2020-10-28 14:56:51,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:51" (1/1) ... [2020-10-28 14:56:51,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:51" (1/1) ... [2020-10-28 14:56:51,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:51" (1/1) ... [2020-10-28 14:56:51,389 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:51" (1/1) ... [2020-10-28 14:56:51,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:56:51,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:56:51,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:56:51,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:56:51,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:51" (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 14:56:51,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:56:51,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:56:51,477 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:56:51,477 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 14:56:51,477 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:56:51,477 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:56:51,477 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:56:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:56:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:56:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 14:56:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:56:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:56:51,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:56:51,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:56:51,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:56:51,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:56:51,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:56:51,731 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:56:51,732 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:56:51,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:56:51 BoogieIcfgContainer [2020-10-28 14:56:51,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:56:51,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:56:51,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:56:51,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:56:51,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:56:51" (1/3) ... [2020-10-28 14:56:51,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbd8af5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:56:51, skipping insertion in model container [2020-10-28 14:56:51,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:51" (2/3) ... [2020-10-28 14:56:51,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbd8af5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:56:51, skipping insertion in model container [2020-10-28 14:56:51,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:56:51" (3/3) ... [2020-10-28 14:56:51,746 INFO L111 eAbstractionObserver]: Analyzing ICFG phases_1-2.c [2020-10-28 14:56:51,765 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:56:51,771 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:56:51,787 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:56:51,821 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:56:51,821 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:56:51,821 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:56:51,821 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:56:51,822 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:56:51,822 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:56:51,824 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:56:51,824 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:56:51,867 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-28 14:56:51,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:56:51,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:51,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:51,886 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:51,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:51,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1347720711, now seen corresponding path program 1 times [2020-10-28 14:56:51,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:51,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839354068] [2020-10-28 14:56:51,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:52,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:52,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:52,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:52,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:52,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:56:52,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:56:52,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-28 14:56:52,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:52,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:52,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:52,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:56:52,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:52,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:56:52,745 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-28 14:56:52,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:52,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:52,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:52,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:52,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:52,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 14:56:52,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:52,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:52,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:52,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:52,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:52,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:56:52,808 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 14:56:52,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839354068] [2020-10-28 14:56:52,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:56:52,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:56:52,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209710561] [2020-10-28 14:56:52,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:56:52,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:52,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:56:52,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:56:52,848 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-10-28 14:56:52,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:52,924 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-10-28 14:56:52,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:56:52,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 14:56:52,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:52,935 INFO L225 Difference]: With dead ends: 35 [2020-10-28 14:56:52,935 INFO L226 Difference]: Without dead ends: 14 [2020-10-28 14:56:52,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:56:52,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-28 14:56:52,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-28 14:56:52,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-28 14:56:52,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-28 14:56:52,984 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2020-10-28 14:56:52,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:52,985 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-28 14:56:52,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:56:52,985 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-28 14:56:52,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:56:52,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:52,986 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:52,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:56:52,987 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:52,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:52,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1061429201, now seen corresponding path program 1 times [2020-10-28 14:56:52,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:52,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276748840] [2020-10-28 14:56:52,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:53,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:53,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:53,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:53,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:56:53,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:56:53,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-28 14:56:53,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:53,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:53,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:56:53,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:53,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:56:53,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:53,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:53,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:53,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:53,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:53,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:53,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:56:53,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:53,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:53,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:53,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:53,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:53,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:53,316 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 14:56:53,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276748840] [2020-10-28 14:56:53,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:56:53,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:56:53,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345602472] [2020-10-28 14:56:53,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:56:53,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:53,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:56:53,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:56:53,320 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-10-28 14:56:53,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:53,405 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-10-28 14:56:53,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:56:53,405 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-28 14:56:53,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:53,406 INFO L225 Difference]: With dead ends: 24 [2020-10-28 14:56:53,406 INFO L226 Difference]: Without dead ends: 16 [2020-10-28 14:56:53,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:56:53,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-28 14:56:53,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-28 14:56:53,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-28 14:56:53,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-28 14:56:53,416 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-28 14:56:53,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:53,417 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-28 14:56:53,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:56:53,417 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-28 14:56:53,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 14:56:53,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:53,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:53,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:56:53,418 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:53,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:53,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1101414388, now seen corresponding path program 1 times [2020-10-28 14:56:53,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:53,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175180561] [2020-10-28 14:56:53,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:53,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:53,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:53,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:56:53,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:53,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 14:56:53,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:53,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:53,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:56:53,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:56:53,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:56:53,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:53,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:53,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:53,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:53,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:53,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:53,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:53,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:56:53,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:53,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:53,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:53,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:53,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:53,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:53,551 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 14:56:53,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175180561] [2020-10-28 14:56:53,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:56:53,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:56:53,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065890760] [2020-10-28 14:56:53,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:56:53,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:53,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:56:53,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:56:53,555 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 4 states. [2020-10-28 14:56:53,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:53,638 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-28 14:56:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:56:53,639 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-28 14:56:53,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:53,640 INFO L225 Difference]: With dead ends: 24 [2020-10-28 14:56:53,640 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 14:56:53,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:56:53,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 14:56:53,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-28 14:56:53,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-28 14:56:53,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-28 14:56:53,649 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-10-28 14:56:53,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:53,649 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-28 14:56:53,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:56:53,650 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-28 14:56:53,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:56:53,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:53,650 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:53,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:56:53,651 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:53,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:53,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1647486503, now seen corresponding path program 1 times [2020-10-28 14:56:53,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:53,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465384448] [2020-10-28 14:56:53,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:53,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:53,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:53,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:53,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:56:53,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:56:53,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-28 14:56:53,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:53,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:53,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:56:53,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:53,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:56:53,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:53,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:53,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:53,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:53,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:53,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:53,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:53,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:56:53,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:53,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:53,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:53,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:53,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:53,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:53,968 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 14:56:53,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465384448] [2020-10-28 14:56:53,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:53,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 14:56:53,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875484895] [2020-10-28 14:56:53,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:56:53,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:53,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:56:53,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:56:53,971 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-28 14:56:54,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:54,085 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-10-28 14:56:54,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:56:54,085 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-28 14:56:54,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:54,086 INFO L225 Difference]: With dead ends: 28 [2020-10-28 14:56:54,086 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 14:56:54,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:56:54,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 14:56:54,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 14:56:54,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 14:56:54,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-28 14:56:54,093 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-28 14:56:54,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:54,094 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-28 14:56:54,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:56:54,094 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-28 14:56:54,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:56:54,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:54,095 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:54,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:56:54,095 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:54,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:54,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1678553212, now seen corresponding path program 2 times [2020-10-28 14:56:54,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:54,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901779069] [2020-10-28 14:56:54,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:54,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:54,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:54,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:54,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:56:54,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:56:54,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-28 14:56:54,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:54,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:54,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:56:54,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:54,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:56:54,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:54,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:54,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:54,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:54,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:54,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:54,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:56:54,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:54,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:54,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:54,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:54,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:54,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:54,484 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 14:56:54,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901779069] [2020-10-28 14:56:54,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:54,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:56:54,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219924066] [2020-10-28 14:56:54,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:56:54,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:54,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:56:54,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:56:54,498 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2020-10-28 14:56:54,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:54,684 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-28 14:56:54,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:56:54,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-28 14:56:54,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:54,685 INFO L225 Difference]: With dead ends: 30 [2020-10-28 14:56:54,686 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 14:56:54,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:56:54,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 14:56:54,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-28 14:56:54,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 14:56:54,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-28 14:56:54,693 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-10-28 14:56:54,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:54,694 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-28 14:56:54,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:56:54,694 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-28 14:56:54,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:56:54,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:54,695 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:54,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:56:54,695 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:54,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:54,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1747916193, now seen corresponding path program 3 times [2020-10-28 14:56:54,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:54,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355745993] [2020-10-28 14:56:54,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:54,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:54,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:54,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:54,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:56:54,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:56:54,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-28 14:56:54,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:54,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:54,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:56:54,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:56:54,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:56:54,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:54,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:54,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:54,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:54,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:54,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:54,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:56:54,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:54,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:54,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:54,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:54,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:54,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:56:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 14:56:54,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355745993] [2020-10-28 14:56:54,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:54,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 14:56:54,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995902951] [2020-10-28 14:56:54,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:56:54,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:54,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:56:54,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:56:54,964 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-10-28 14:56:57,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:57,199 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-28 14:56:57,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:56:57,200 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-28 14:56:57,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:57,203 INFO L225 Difference]: With dead ends: 30 [2020-10-28 14:56:57,203 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 14:56:57,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:56:57,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 14:56:57,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-28 14:56:57,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 14:56:57,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-28 14:56:57,218 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-10-28 14:56:57,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:57,219 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-28 14:56:57,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:56:57,219 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-28 14:56:57,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:56:57,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:57,220 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:57,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:56:57,220 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:57,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:57,222 INFO L82 PathProgramCache]: Analyzing trace with hash 334960004, now seen corresponding path program 4 times [2020-10-28 14:56:57,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:57,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909501746] [2020-10-28 14:56:57,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:57,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:57,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:57,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:57,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:56:57,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:56:57,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-28 14:56:57,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:57,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:57,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:56:57,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:57,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:56:57,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:57,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:57,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:57,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:57,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:57,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:57,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 14:56:57,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:57,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:57,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:57,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:57,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:57,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:56:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:56:57,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909501746] [2020-10-28 14:56:57,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:57,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:56:57,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367427790] [2020-10-28 14:56:57,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:56:57,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:57,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:56:57,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:56:57,781 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 7 states. [2020-10-28 14:56:58,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:58,029 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-10-28 14:56:58,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:56:58,029 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-28 14:56:58,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:58,030 INFO L225 Difference]: With dead ends: 36 [2020-10-28 14:56:58,030 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 14:56:58,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:56:58,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 14:56:58,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-28 14:56:58,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 14:56:58,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-28 14:56:58,044 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2020-10-28 14:56:58,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:58,044 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-28 14:56:58,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:56:58,044 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-28 14:56:58,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:56:58,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:58,047 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:58,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:56:58,047 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:58,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:58,048 INFO L82 PathProgramCache]: Analyzing trace with hash -176839193, now seen corresponding path program 5 times [2020-10-28 14:56:58,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:58,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946902095] [2020-10-28 14:56:58,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:58,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:58,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:58,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:58,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:56:58,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:56:58,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 442 [2020-10-28 14:56:58,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:58,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:58,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:56:58,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:58,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:56:58,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:58,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:58,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:58,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:58,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:58,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:58,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:56:58,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:58,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:58,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:58,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:58,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:58,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 14:56:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:56:58,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946902095] [2020-10-28 14:56:58,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:58,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:56:58,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882003028] [2020-10-28 14:56:58,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:56:58,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:58,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:56:58,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:56:58,679 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2020-10-28 14:56:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:58,993 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-28 14:56:58,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:56:58,995 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-28 14:56:58,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:58,996 INFO L225 Difference]: With dead ends: 38 [2020-10-28 14:56:58,996 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 14:56:58,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:56:58,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 14:56:59,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 14:56:59,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 14:56:59,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-28 14:56:59,009 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2020-10-28 14:56:59,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:59,010 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-28 14:56:59,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:56:59,010 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-28 14:56:59,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:56:59,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:59,011 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:59,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:56:59,011 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:59,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:59,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1905371530, now seen corresponding path program 6 times [2020-10-28 14:56:59,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:59,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467695669] [2020-10-28 14:56:59,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:59,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:59,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:59,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:59,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:56:59,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:56:59,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 325 [2020-10-28 14:56:59,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:59,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:59,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:56:59,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:56:59,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:56:59,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:01,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:01,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:01,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:01,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:01,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:01,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:57:01,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:01,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:01,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:01,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:01,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:01,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 2 refuted. 2 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 14:57:01,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467695669] [2020-10-28 14:57:01,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:01,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:57:01,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802076432] [2020-10-28 14:57:01,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:57:01,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:01,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:57:01,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=18, Unknown=1, NotChecked=0, Total=30 [2020-10-28 14:57:01,593 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 6 states. [2020-10-28 14:57:04,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:04,096 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-28 14:57:04,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:57:04,097 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-28 14:57:04,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:04,097 INFO L225 Difference]: With dead ends: 38 [2020-10-28 14:57:04,098 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 14:57:04,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=35, Invalid=53, Unknown=2, NotChecked=0, Total=90 [2020-10-28 14:57:04,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 14:57:04,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-28 14:57:04,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 14:57:04,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-28 14:57:04,106 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 26 [2020-10-28 14:57:04,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:04,107 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-28 14:57:04,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:57:04,107 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-28 14:57:04,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:57:04,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:04,108 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:04,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:57:04,108 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:04,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:04,109 INFO L82 PathProgramCache]: Analyzing trace with hash -2138786321, now seen corresponding path program 7 times [2020-10-28 14:57:04,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:04,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054283522] [2020-10-28 14:57:04,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:04,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:04,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:04,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:04,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:57:04,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:04,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 697 [2020-10-28 14:57:04,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:04,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:04,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:57:04,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:04,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:57:04,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:04,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:04,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:05,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:05,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:05,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:05,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:57:05,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:05,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:05,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:05,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:05,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:05,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:05,010 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 14:57:05,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054283522] [2020-10-28 14:57:05,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:05,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:57:05,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176484722] [2020-10-28 14:57:05,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:57:05,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:05,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:57:05,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:57:05,014 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2020-10-28 14:57:05,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:05,401 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-10-28 14:57:05,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:57:05,402 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-28 14:57:05,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:05,403 INFO L225 Difference]: With dead ends: 44 [2020-10-28 14:57:05,403 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 14:57:05,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:57:05,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 14:57:05,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-28 14:57:05,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 14:57:05,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-28 14:57:05,419 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 28 [2020-10-28 14:57:05,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:05,420 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-28 14:57:05,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:57:05,420 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-28 14:57:05,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:57:05,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:05,423 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:05,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:57:05,423 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:05,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:05,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1042272238, now seen corresponding path program 8 times [2020-10-28 14:57:05,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:05,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134355300] [2020-10-28 14:57:05,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:05,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:05,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:05,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:06,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:06,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:57:06,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:06,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 659 [2020-10-28 14:57:06,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:06,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:06,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:57:06,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:06,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:57:06,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:06,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:06,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:06,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:06,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:06,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:06,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:06,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:57:06,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:06,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:06,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:06,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:06,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:06,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 14:57:06,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134355300] [2020-10-28 14:57:06,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:06,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:57:06,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027675909] [2020-10-28 14:57:06,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:57:06,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:06,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:57:06,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:57:06,280 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 10 states. [2020-10-28 14:57:06,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:06,791 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-28 14:57:06,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:57:06,792 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-28 14:57:06,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:06,793 INFO L225 Difference]: With dead ends: 46 [2020-10-28 14:57:06,794 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 14:57:06,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:57:06,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 14:57:06,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-28 14:57:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 14:57:06,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-28 14:57:06,803 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 30 [2020-10-28 14:57:06,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:06,803 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-28 14:57:06,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:57:06,804 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-28 14:57:06,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:57:06,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:06,804 INFO L422 BasicCegarLoop]: trace histogram [10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:06,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:57:06,805 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:06,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:06,805 INFO L82 PathProgramCache]: Analyzing trace with hash 440774005, now seen corresponding path program 9 times [2020-10-28 14:57:06,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:06,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85560905] [2020-10-28 14:57:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:06,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:06,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:07,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:07,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:57:07,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:07,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 639 [2020-10-28 14:57:07,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:07,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:07,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:57:07,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 14:57:07,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:57:07,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:07,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:07,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:07,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:07,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:07,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:07,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:57:07,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:07,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:07,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:07,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:07,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:07,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-28 14:57:07,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85560905] [2020-10-28 14:57:07,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:07,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:57:07,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546616567] [2020-10-28 14:57:07,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:57:07,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:07,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:57:07,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:57:07,666 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 7 states. [2020-10-28 14:57:12,453 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 49 [2020-10-28 14:57:14,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:14,693 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-28 14:57:14,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:57:14,694 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-28 14:57:14,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:14,695 INFO L225 Difference]: With dead ends: 46 [2020-10-28 14:57:14,696 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 14:57:14,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:57:14,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 14:57:14,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2020-10-28 14:57:14,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 14:57:14,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-28 14:57:14,705 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 32 [2020-10-28 14:57:14,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:14,706 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-28 14:57:14,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:57:14,706 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-28 14:57:14,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:57:14,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:14,707 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:14,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:57:14,707 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:14,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:14,708 INFO L82 PathProgramCache]: Analyzing trace with hash -867734758, now seen corresponding path program 10 times [2020-10-28 14:57:14,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:14,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788653882] [2020-10-28 14:57:14,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:14,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:14,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:15,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:15,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:57:15,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:15,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1121 [2020-10-28 14:57:15,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:15,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:15,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:57:15,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:15,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:57:15,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:16,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:16,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:16,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:16,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:16,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:16,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:57:16,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:16,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:16,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:16,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:16,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:16,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:16,064 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 14:57:16,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788653882] [2020-10-28 14:57:16,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:16,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:57:16,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370189797] [2020-10-28 14:57:16,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:57:16,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:16,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:57:16,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:57:16,068 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 11 states. [2020-10-28 14:57:16,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:16,589 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2020-10-28 14:57:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:57:16,590 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-28 14:57:16,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:16,591 INFO L225 Difference]: With dead ends: 52 [2020-10-28 14:57:16,591 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 14:57:16,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:57:16,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 14:57:16,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-28 14:57:16,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 14:57:16,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-28 14:57:16,604 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 34 [2020-10-28 14:57:16,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:16,605 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-28 14:57:16,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:57:16,606 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-28 14:57:16,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:57:16,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:16,608 INFO L422 BasicCegarLoop]: trace histogram [12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:16,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:57:16,608 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:16,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:16,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1360625405, now seen corresponding path program 11 times [2020-10-28 14:57:16,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:16,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236527511] [2020-10-28 14:57:16,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:16,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:16,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:17,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:17,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:57:17,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:17,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 973 [2020-10-28 14:57:17,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:17,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:17,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:57:17,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 14:57:17,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:57:17,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:17,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:17,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:17,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:17,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:17,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:17,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:57:17,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:17,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:17,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:17,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:17,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:17,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 16 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 14:57:17,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236527511] [2020-10-28 14:57:17,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:17,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:57:17,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743927142] [2020-10-28 14:57:17,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:57:17,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:17,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:57:17,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:57:17,781 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 8 states. [2020-10-28 14:57:20,207 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-28 14:57:22,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:22,555 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-10-28 14:57:22,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:57:22,556 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-28 14:57:22,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:22,556 INFO L225 Difference]: With dead ends: 48 [2020-10-28 14:57:22,557 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 14:57:22,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=63, Invalid=118, Unknown=1, NotChecked=0, Total=182 [2020-10-28 14:57:22,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 14:57:22,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-10-28 14:57:22,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 14:57:22,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-28 14:57:22,566 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 36 [2020-10-28 14:57:22,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:22,567 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-28 14:57:22,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:57:22,567 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-28 14:57:22,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:57:22,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:22,568 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:22,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:57:22,568 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:22,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:22,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1653802334, now seen corresponding path program 12 times [2020-10-28 14:57:22,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:22,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028951914] [2020-10-28 14:57:22,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:22,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:22,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:22,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:23,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:23,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:57:23,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:23,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1095 [2020-10-28 14:57:23,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:23,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:23,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:57:23,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:23,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:57:23,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:23,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:23,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:23,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:23,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:23,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:23,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:57:23,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:23,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:23,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:23,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:23,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:23,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 81 proven. 72 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 14:57:23,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028951914] [2020-10-28 14:57:23,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:23,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:57:23,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008256716] [2020-10-28 14:57:23,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:57:23,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:23,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:57:23,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:57:23,910 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 12 states. [2020-10-28 14:57:24,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:24,482 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2020-10-28 14:57:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:57:24,483 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-28 14:57:24,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:24,484 INFO L225 Difference]: With dead ends: 58 [2020-10-28 14:57:24,487 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 14:57:24,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:57:24,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 14:57:24,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-28 14:57:24,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 14:57:24,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-28 14:57:24,512 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 38 [2020-10-28 14:57:24,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:24,512 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-28 14:57:24,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:57:24,512 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-28 14:57:24,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:57:24,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:24,515 INFO L422 BasicCegarLoop]: trace histogram [14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:24,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:57:24,515 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:24,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:24,516 INFO L82 PathProgramCache]: Analyzing trace with hash -2122554107, now seen corresponding path program 13 times [2020-10-28 14:57:24,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:24,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955581316] [2020-10-28 14:57:24,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:24,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:24,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:26,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:26,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:57:26,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:26,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1494 [2020-10-28 14:57:26,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:26,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:26,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:57:26,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:26,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:57:26,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:26,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:26,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:26,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:26,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:26,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:26,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:57:26,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:26,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:26,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:26,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:26,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:26,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 14:57:26,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955581316] [2020-10-28 14:57:26,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:26,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:57:26,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685711745] [2020-10-28 14:57:26,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:57:26,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:26,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:57:26,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:57:26,293 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 13 states. [2020-10-28 14:57:26,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:26,900 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2020-10-28 14:57:26,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:57:26,901 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-28 14:57:26,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:26,902 INFO L225 Difference]: With dead ends: 60 [2020-10-28 14:57:26,902 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 14:57:26,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:57:26,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 14:57:26,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-28 14:57:26,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 14:57:26,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-28 14:57:26,918 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 40 [2020-10-28 14:57:26,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:26,918 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-28 14:57:26,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:57:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-28 14:57:26,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:57:26,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:26,921 INFO L422 BasicCegarLoop]: trace histogram [15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:26,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:57:26,921 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:26,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:26,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1621441880, now seen corresponding path program 14 times [2020-10-28 14:57:26,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:26,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888869157] [2020-10-28 14:57:26,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:26,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:27,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:28,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:28,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:57:28,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:28,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1533 [2020-10-28 14:57:28,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:28,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:28,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:57:28,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 14:57:28,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:57:28,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:28,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:28,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:28,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:28,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:28,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:28,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:57:28,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:28,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:28,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:28,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:28,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:28,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:28,680 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 110 proven. 25 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-28 14:57:28,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888869157] [2020-10-28 14:57:28,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:28,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:57:28,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45845223] [2020-10-28 14:57:28,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:57:28,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:28,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:57:28,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:57:28,686 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 9 states. [2020-10-28 14:57:29,135 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-28 14:57:29,822 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-28 14:57:31,386 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-28 14:57:36,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:36,249 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-10-28 14:57:36,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:57:36,250 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-28 14:57:36,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:36,251 INFO L225 Difference]: With dead ends: 54 [2020-10-28 14:57:36,251 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 14:57:36,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=81, Invalid=158, Unknown=1, NotChecked=0, Total=240 [2020-10-28 14:57:36,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 14:57:36,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-10-28 14:57:36,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 14:57:36,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-10-28 14:57:36,265 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 42 [2020-10-28 14:57:36,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:36,267 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-10-28 14:57:36,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:57:36,267 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-10-28 14:57:36,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:57:36,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:36,268 INFO L422 BasicCegarLoop]: trace histogram [16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:36,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:57:36,268 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:36,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:36,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1617690509, now seen corresponding path program 15 times [2020-10-28 14:57:36,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:36,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168264825] [2020-10-28 14:57:36,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:36,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:36,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:38,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:38,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 14:57:38,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:38,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1944 [2020-10-28 14:57:38,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:38,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:38,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:57:38,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:38,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:57:38,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:38,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:38,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:38,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:38,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:38,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:38,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:57:38,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:38,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:38,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:38,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:38,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:38,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:38,492 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 121 proven. 110 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 14:57:38,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168264825] [2020-10-28 14:57:38,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:38,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:57:38,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990335494] [2020-10-28 14:57:38,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:57:38,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:38,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:57:38,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:57:38,499 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 14 states. [2020-10-28 14:57:39,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:39,254 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2020-10-28 14:57:39,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:57:39,255 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2020-10-28 14:57:39,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:39,256 INFO L225 Difference]: With dead ends: 66 [2020-10-28 14:57:39,256 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 14:57:39,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:57:39,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 14:57:39,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-28 14:57:39,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 14:57:39,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-28 14:57:39,269 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 44 [2020-10-28 14:57:39,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:39,269 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-28 14:57:39,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:57:39,269 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-28 14:57:39,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 14:57:39,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:39,277 INFO L422 BasicCegarLoop]: trace histogram [17, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:39,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:57:39,277 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:39,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:39,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2033396816, now seen corresponding path program 16 times [2020-10-28 14:57:39,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:39,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589437104] [2020-10-28 14:57:39,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:39,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:39,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:39,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:41,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:41,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:57:41,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:41,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2232 [2020-10-28 14:57:41,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:41,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:41,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:57:41,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 14:57:41,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:57:41,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:43,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:43,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:43,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:43,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:43,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:43,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 14:57:43,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:43,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:43,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:43,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:43,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:43,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 143 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-28 14:57:43,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589437104] [2020-10-28 14:57:43,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:43,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:57:43,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820578723] [2020-10-28 14:57:43,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:57:43,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:43,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:57:43,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=67, Unknown=1, NotChecked=0, Total=90 [2020-10-28 14:57:43,962 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 10 states. [2020-10-28 14:57:48,789 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-28 14:57:53,083 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-28 14:57:53,524 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-28 14:57:55,865 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-28 14:58:00,258 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-28 14:58:03,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:03,394 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-10-28 14:58:03,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:58:03,395 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-28 14:58:03,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:03,396 INFO L225 Difference]: With dead ends: 62 [2020-10-28 14:58:03,396 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 14:58:03,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=120, Invalid=256, Unknown=4, NotChecked=0, Total=380 [2020-10-28 14:58:03,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 14:58:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2020-10-28 14:58:03,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 14:58:03,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-10-28 14:58:03,408 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 46 [2020-10-28 14:58:03,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:03,408 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-10-28 14:58:03,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:58:03,408 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-10-28 14:58:03,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:58:03,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:03,409 INFO L422 BasicCegarLoop]: trace histogram [18, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:03,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:58:03,409 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:03,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:03,410 INFO L82 PathProgramCache]: Analyzing trace with hash 865988245, now seen corresponding path program 17 times [2020-10-28 14:58:03,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:03,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685032127] [2020-10-28 14:58:03,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:03,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:03,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:05,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:05,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:58:05,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:05,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2370 [2020-10-28 14:58:05,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:05,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:05,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:58:05,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:05,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 14:58:05,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:06,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:06,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:06,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:06,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:06,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:06,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:58:06,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:06,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:06,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:06,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:06,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:06,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 14:58:06,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685032127] [2020-10-28 14:58:06,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:06,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:58:06,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354474289] [2020-10-28 14:58:06,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:58:06,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:06,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:58:06,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:58:06,108 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 15 states. [2020-10-28 14:58:07,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:07,064 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2020-10-28 14:58:07,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:58:07,065 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-28 14:58:07,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:07,066 INFO L225 Difference]: With dead ends: 72 [2020-10-28 14:58:07,066 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 14:58:07,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:58:07,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 14:58:07,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-28 14:58:07,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 14:58:07,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-28 14:58:07,087 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 48 [2020-10-28 14:58:07,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:07,087 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-28 14:58:07,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:58:07,088 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-28 14:58:07,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 14:58:07,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:07,095 INFO L422 BasicCegarLoop]: trace histogram [19, 12, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:07,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:58:07,095 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:07,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:07,096 INFO L82 PathProgramCache]: Analyzing trace with hash -681445064, now seen corresponding path program 18 times [2020-10-28 14:58:07,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:07,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381183598] [2020-10-28 14:58:07,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:07,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:07,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:09,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:09,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:58:09,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:09,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2068 [2020-10-28 14:58:09,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:09,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:09,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:58:09,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:09,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:58:09,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:09,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:09,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:09,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:09,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:09,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:09,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:58:09,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:09,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:09,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:09,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:09,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:09,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:09,534 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 169 proven. 156 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 14:58:09,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381183598] [2020-10-28 14:58:09,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:09,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:58:09,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302402653] [2020-10-28 14:58:09,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:58:09,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:09,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:58:09,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:58:09,537 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 16 states. [2020-10-28 14:58:10,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:10,641 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2020-10-28 14:58:10,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:58:10,641 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-10-28 14:58:10,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:10,642 INFO L225 Difference]: With dead ends: 74 [2020-10-28 14:58:10,642 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 14:58:10,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:58:10,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 14:58:10,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-28 14:58:10,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 14:58:10,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-10-28 14:58:10,663 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 50 [2020-10-28 14:58:10,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:10,663 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-10-28 14:58:10,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:58:10,664 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-10-28 14:58:10,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:58:10,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:10,666 INFO L422 BasicCegarLoop]: trace histogram [20, 13, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:10,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:58:10,666 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:10,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:10,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1706170597, now seen corresponding path program 19 times [2020-10-28 14:58:10,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:10,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981830094] [2020-10-28 14:58:10,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:10,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:10,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:13,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:13,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 14:58:13,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:13,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2516 [2020-10-28 14:58:13,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:13,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:13,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:58:13,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 14:58:13,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:58:13,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:13,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:13,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:13,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:13,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:13,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:13,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:58:13,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:13,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:13,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:13,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:13,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:13,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 195 proven. 49 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-28 14:58:13,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981830094] [2020-10-28 14:58:13,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:13,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:58:13,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044727263] [2020-10-28 14:58:13,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:58:13,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:13,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:58:13,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:58:13,549 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 11 states. [2020-10-28 14:58:16,035 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2020-10-28 14:58:16,401 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2020-10-28 14:58:17,123 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-28 14:58:19,528 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-28 14:58:24,188 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-28 14:58:30,582 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-28 14:58:35,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:35,138 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2020-10-28 14:58:35,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:58:35,141 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-28 14:58:35,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:35,142 INFO L225 Difference]: With dead ends: 65 [2020-10-28 14:58:35,142 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 14:58:35,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=140, Invalid=277, Unknown=3, NotChecked=0, Total=420 [2020-10-28 14:58:35,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 14:58:35,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2020-10-28 14:58:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 14:58:35,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-10-28 14:58:35,153 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 52 [2020-10-28 14:58:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:35,154 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-10-28 14:58:35,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:58:35,154 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-10-28 14:58:35,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 14:58:35,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:35,154 INFO L422 BasicCegarLoop]: trace histogram [21, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:35,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:58:35,155 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:35,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:35,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1797772096, now seen corresponding path program 20 times [2020-10-28 14:58:35,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:35,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343294094] [2020-10-28 14:58:35,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:35,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:35,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:37,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:37,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 14:58:37,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:37,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2258 [2020-10-28 14:58:37,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:37,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:37,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:58:37,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:37,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:58:37,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:37,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:37,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:37,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:37,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:37,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:37,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:37,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:37,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:37,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:37,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:37,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:37,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 14:58:37,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343294094] [2020-10-28 14:58:37,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:37,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:58:37,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028619877] [2020-10-28 14:58:37,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:58:37,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:37,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:58:37,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:58:37,797 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 17 states. [2020-10-28 14:58:38,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:38,976 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2020-10-28 14:58:38,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:58:38,978 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 54 [2020-10-28 14:58:38,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:38,979 INFO L225 Difference]: With dead ends: 80 [2020-10-28 14:58:38,979 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 14:58:38,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:58:38,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 14:58:39,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-28 14:58:39,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 14:58:39,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-10-28 14:58:39,001 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 54 [2020-10-28 14:58:39,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:39,001 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-10-28 14:58:39,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:58:39,001 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-10-28 14:58:39,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 14:58:39,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:39,003 INFO L422 BasicCegarLoop]: trace histogram [22, 14, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:39,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:58:39,003 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:39,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:39,004 INFO L82 PathProgramCache]: Analyzing trace with hash -657188957, now seen corresponding path program 21 times [2020-10-28 14:58:39,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:39,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793756580] [2020-10-28 14:58:39,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:39,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:39,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:41,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:41,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 14:58:41,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:41,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2521 [2020-10-28 14:58:41,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:41,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:41,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:58:41,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:41,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:58:41,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:41,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:41,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:41,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:41,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:41,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:41,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:58:41,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:41,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:41,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:41,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:41,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:41,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 225 proven. 210 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 14:58:41,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793756580] [2020-10-28 14:58:41,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:41,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:58:41,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147202304] [2020-10-28 14:58:41,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:58:41,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:41,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:58:41,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:58:41,944 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 18 states. [2020-10-28 14:58:43,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:43,198 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2020-10-28 14:58:43,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:58:43,199 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 56 [2020-10-28 14:58:43,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:43,201 INFO L225 Difference]: With dead ends: 82 [2020-10-28 14:58:43,201 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 14:58:43,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:58:43,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 14:58:43,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-28 14:58:43,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 14:58:43,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2020-10-28 14:58:43,217 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 56 [2020-10-28 14:58:43,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:43,218 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2020-10-28 14:58:43,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:58:43,218 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2020-10-28 14:58:43,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 14:58:43,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:43,219 INFO L422 BasicCegarLoop]: trace histogram [23, 15, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:43,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:58:43,219 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:43,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:43,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1937715386, now seen corresponding path program 22 times [2020-10-28 14:58:43,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:43,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985975946] [2020-10-28 14:58:43,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:43,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:43,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:45,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:45,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 14:58:45,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:45,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2563 [2020-10-28 14:58:45,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:45,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:45,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:58:45,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 14:58:45,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:58:45,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:50,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:50,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:50,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:50,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:50,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:50,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:50,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:50,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:50,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 255 proven. 60 refuted. 4 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-28 14:58:50,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985975946] [2020-10-28 14:58:50,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:50,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:58:50,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309391557] [2020-10-28 14:58:50,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:58:50,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:50,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:58:50,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=101, Unknown=2, NotChecked=0, Total=132 [2020-10-28 14:58:50,200 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 12 states. [2020-10-28 14:58:51,213 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2020-10-28 14:58:51,821 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2020-10-28 14:58:53,327 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-28 14:58:55,763 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-28 14:59:02,602 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-28 14:59:03,252 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-28 14:59:09,636 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-28 14:59:18,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:18,135 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-10-28 14:59:18,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:59:18,136 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2020-10-28 14:59:18,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:18,137 INFO L225 Difference]: With dead ends: 72 [2020-10-28 14:59:18,137 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 14:59:18,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=158, Invalid=344, Unknown=4, NotChecked=0, Total=506 [2020-10-28 14:59:18,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 14:59:18,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-10-28 14:59:18,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 14:59:18,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-28 14:59:18,153 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 58 [2020-10-28 14:59:18,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:18,153 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-28 14:59:18,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:59:18,153 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-28 14:59:18,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 14:59:18,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:18,154 INFO L422 BasicCegarLoop]: trace histogram [24, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:18,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:59:18,154 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:18,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:18,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1673438037, now seen corresponding path program 23 times [2020-10-28 14:59:18,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:18,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504676133] [2020-10-28 14:59:18,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:18,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:18,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:21,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:21,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:59:21,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:59:21,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2900 [2020-10-28 14:59:21,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:21,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:21,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:59:21,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:21,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:59:21,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:21,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:21,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:21,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:21,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:21,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:21,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:59:21,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:21,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:21,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:21,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:21,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:21,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 14:59:21,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504676133] [2020-10-28 14:59:21,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:21,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:59:21,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436167751] [2020-10-28 14:59:21,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:59:21,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:21,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:59:21,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:59:21,523 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 19 states. [2020-10-28 14:59:22,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:22,815 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2020-10-28 14:59:22,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:59:22,816 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 60 [2020-10-28 14:59:22,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:22,817 INFO L225 Difference]: With dead ends: 88 [2020-10-28 14:59:22,817 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 14:59:22,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:59:22,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 14:59:22,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-28 14:59:22,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 14:59:22,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-10-28 14:59:22,831 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 60 [2020-10-28 14:59:22,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:22,831 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-10-28 14:59:22,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:59:22,831 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-10-28 14:59:22,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 14:59:22,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:22,832 INFO L422 BasicCegarLoop]: trace histogram [25, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:22,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:59:22,832 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:22,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:22,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1246524722, now seen corresponding path program 24 times [2020-10-28 14:59:22,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:22,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557119180] [2020-10-28 14:59:22,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:22,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:22,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:26,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:26,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 14:59:26,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:59:26,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3555 [2020-10-28 14:59:26,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:26,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:26,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:59:26,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 14:59:26,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:59:26,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:27,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:27,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:27,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:27,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:27,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:27,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:59:27,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:27,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:27,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:27,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:27,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:27,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 304 proven. 81 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2020-10-28 14:59:27,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557119180] [2020-10-28 14:59:27,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:27,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:59:27,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869052191] [2020-10-28 14:59:27,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:59:27,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:27,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:59:27,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:59:27,044 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 13 states. [2020-10-28 14:59:27,580 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2020-10-28 14:59:28,048 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 49 [2020-10-28 14:59:32,667 WARN L193 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2020-10-28 14:59:33,617 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2020-10-28 14:59:38,750 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-28 14:59:46,717 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-28 14:59:51,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:51,747 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-10-28 14:59:51,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:59:51,747 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 62 [2020-10-28 14:59:51,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:51,748 INFO L225 Difference]: With dead ends: 74 [2020-10-28 14:59:51,748 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 14:59:51,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=168, Invalid=383, Unknown=1, NotChecked=0, Total=552 [2020-10-28 14:59:51,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 14:59:51,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-10-28 14:59:51,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 14:59:51,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-10-28 14:59:51,760 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 62 [2020-10-28 14:59:51,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:51,761 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-10-28 14:59:51,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:59:51,761 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-10-28 14:59:51,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 14:59:51,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:51,761 INFO L422 BasicCegarLoop]: trace histogram [26, 16, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:51,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:59:51,762 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:51,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:51,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1135826483, now seen corresponding path program 25 times [2020-10-28 14:59:51,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:51,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051770636] [2020-10-28 14:59:51,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:51,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:51,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:55,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:55,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 14:59:55,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:59:55,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4129 [2020-10-28 14:59:55,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:55,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:55,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:59:55,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:55,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 14:59:55,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:56,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:56,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:56,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:56,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:56,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:56,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:59:56,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:56,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:56,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:56,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:56,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:56,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:56,377 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 323 proven. 272 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-28 14:59:56,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051770636] [2020-10-28 14:59:56,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:56,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:59:56,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508454438] [2020-10-28 14:59:56,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:59:56,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:56,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:59:56,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:59:56,379 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 20 states. [2020-10-28 14:59:57,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:57,836 INFO L93 Difference]: Finished difference Result 94 states and 115 transitions. [2020-10-28 14:59:57,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:59:57,837 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2020-10-28 14:59:57,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:57,838 INFO L225 Difference]: With dead ends: 94 [2020-10-28 14:59:57,838 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 14:59:57,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:59:57,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 14:59:57,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-28 14:59:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 14:59:57,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2020-10-28 14:59:57,849 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 64 [2020-10-28 14:59:57,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:57,850 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2020-10-28 14:59:57,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:59:57,850 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2020-10-28 14:59:57,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 14:59:57,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:57,850 INFO L422 BasicCegarLoop]: trace histogram [27, 17, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:57,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:59:57,851 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:57,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:57,851 INFO L82 PathProgramCache]: Analyzing trace with hash -565462314, now seen corresponding path program 26 times [2020-10-28 14:59:57,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:57,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633102238] [2020-10-28 14:59:57,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:57,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:57,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:02,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:02,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 15:00:02,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:00:02,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:00:02,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:02,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:02,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:00:02,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:00:02,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 15:00:02,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:03,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:00:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:03,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:03,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:03,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:00:03,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:03,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:00:03,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:03,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:03,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:03,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:03,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:03,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:03,449 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-28 15:00:03,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633102238] [2020-10-28 15:00:03,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:00:03,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:00:03,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902362194] [2020-10-28 15:00:03,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:00:03,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:00:03,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:00:03,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:00:03,451 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 21 states. [2020-10-28 15:00:05,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:00:05,244 INFO L93 Difference]: Finished difference Result 96 states and 117 transitions. [2020-10-28 15:00:05,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:00:05,245 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 66 [2020-10-28 15:00:05,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:00:05,246 INFO L225 Difference]: With dead ends: 96 [2020-10-28 15:00:05,246 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 15:00:05,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:00:05,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 15:00:05,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-28 15:00:05,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 15:00:05,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2020-10-28 15:00:05,262 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 66 [2020-10-28 15:00:05,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:00:05,263 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2020-10-28 15:00:05,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:00:05,263 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2020-10-28 15:00:05,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 15:00:05,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:00:05,264 INFO L422 BasicCegarLoop]: trace histogram [28, 18, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:00:05,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 15:00:05,264 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:00:05,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:00:05,264 INFO L82 PathProgramCache]: Analyzing trace with hash 878543545, now seen corresponding path program 27 times [2020-10-28 15:00:05,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:00:05,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004196958] [2020-10-28 15:00:05,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:00:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:05,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:05,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:09,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:09,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 15:00:09,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:00:09,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4009 [2020-10-28 15:00:09,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:09,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:09,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:00:09,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 15:00:09,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 15:00:09,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:13,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:00:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:13,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:13,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:13,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:00:13,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:13,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:00:13,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:13,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:13,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:13,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:13,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:13,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 378 proven. 96 refuted. 4 times theorem prover too weak. 306 trivial. 0 not checked. [2020-10-28 15:00:13,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004196958] [2020-10-28 15:00:13,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:00:13,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:00:13,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645922379] [2020-10-28 15:00:13,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:00:13,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:00:13,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:00:13,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=145, Unknown=2, NotChecked=0, Total=182 [2020-10-28 15:00:13,837 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand 14 states. [2020-10-28 15:00:16,861 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2020-10-28 15:00:21,083 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 96 DAG size of output: 47 [2020-10-28 15:00:22,438 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2020-10-28 15:00:25,580 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2020-10-28 15:00:30,512 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-28 15:00:41,253 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-28 15:00:48,122 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-28 15:01:00,182 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47