/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=DEEPEST --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/eca-rers2012/Problem15_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:33:01,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:33:01,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:33:01,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:33:01,616 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:33:01,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:33:01,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:33:01,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:33:01,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:33:01,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:33:01,630 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:33:01,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:33:01,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:33:01,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:33:01,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:33:01,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:33:01,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:33:01,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:33:01,667 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:33:01,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:33:01,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:33:01,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:33:01,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:33:01,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:33:01,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:33:01,695 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:33:01,695 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:33:01,697 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:33:01,697 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:33:01,698 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:33:01,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:33:01,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:33:01,701 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:33:01,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:33:01,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:33:01,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:33:01,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:33:01,705 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:33:01,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:33:01,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:33:01,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:33:01,709 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 [2020-10-27 18:33:01,742 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:33:01,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:33:01,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:33:01,744 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:33:01,745 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:33:01,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:33:01,745 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:33:01,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:33:01,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:33:01,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:33:01,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:33:01,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:33:01,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:33:01,747 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:33:01,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:33:01,748 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:33:01,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:33:01,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:33:01,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:33:01,749 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:33:01,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:33:01,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:33:01,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:33:01,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:33:01,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:33:01,751 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:33:01,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:33:01,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:33:01,752 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:33:01,752 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:33:02,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:33:02,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:33:02,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:33:02,227 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:33:02,228 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:33:02,229 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label54.c [2020-10-27 18:33:02,320 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/32eac821a/d815d68933634916a63cda8646901820/FLAG6fe1df9c5 [2020-10-27 18:33:03,272 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:33:03,273 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label54.c [2020-10-27 18:33:03,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/32eac821a/d815d68933634916a63cda8646901820/FLAG6fe1df9c5 [2020-10-27 18:33:03,414 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/32eac821a/d815d68933634916a63cda8646901820 [2020-10-27 18:33:03,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:33:03,429 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:33:03,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:33:03,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:33:03,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:33:03,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:33:03" (1/1) ... [2020-10-27 18:33:03,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a9638e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:33:03, skipping insertion in model container [2020-10-27 18:33:03,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:33:03" (1/1) ... [2020-10-27 18:33:03,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:33:03,573 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:33:04,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:33:04,525 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:33:04,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:33:04,908 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:33:04,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:33:04 WrapperNode [2020-10-27 18:33:04,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:33:04,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:33:04,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:33:04,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:33:04,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:33:04" (1/1) ... [2020-10-27 18:33:04,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:33:04" (1/1) ... [2020-10-27 18:33:04,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:33:04" (1/1) ... [2020-10-27 18:33:04,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:33:04" (1/1) ... [2020-10-27 18:33:05,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:33:04" (1/1) ... [2020-10-27 18:33:05,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:33:04" (1/1) ... [2020-10-27 18:33:05,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:33:04" (1/1) ... [2020-10-27 18:33:05,236 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:33:05,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:33:05,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:33:05,239 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:33:05,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:33:04" (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 [2020-10-27 18:33:05,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:33:05,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:33:05,367 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:33:05,367 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:33:05,368 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:33:05,369 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:33:05,369 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:33:05,370 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:33:05,370 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:33:05,370 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:33:05,372 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:33:05,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:33:05,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:33:05,372 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:33:05,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:33:05,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:33:05,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:33:05,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:33:05,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:33:05,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:33:05,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:33:09,438 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:33:09,438 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:33:09,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:33:09 BoogieIcfgContainer [2020-10-27 18:33:09,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:33:09,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:33:09,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:33:09,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:33:09,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:33:03" (1/3) ... [2020-10-27 18:33:09,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a49508a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:33:09, skipping insertion in model container [2020-10-27 18:33:09,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:33:04" (2/3) ... [2020-10-27 18:33:09,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a49508a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:33:09, skipping insertion in model container [2020-10-27 18:33:09,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:33:09" (3/3) ... [2020-10-27 18:33:09,453 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label54.c [2020-10-27 18:33:09,470 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:33:09,477 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:33:09,494 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:33:09,532 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:33:09,532 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:33:09,532 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:33:09,533 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:33:09,533 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:33:09,533 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:33:09,533 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:33:09,533 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:33:09,566 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-27 18:33:09,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 18:33:09,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:33:09,577 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:33:09,577 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:33:09,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:33:09,585 INFO L82 PathProgramCache]: Analyzing trace with hash -890920153, now seen corresponding path program 1 times [2020-10-27 18:33:09,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:33:09,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832694444] [2020-10-27 18:33:09,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:33:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:09,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:10,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:10,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 18:33:10,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:33:10,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 691 [2020-10-27 18:33:10,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:10,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:33:10,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:33:10,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 18:33:10,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:33:10,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:33:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:10,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:10,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:10,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:33:10,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:33:10,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 18:33:10,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:10,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:33:10,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:33:10,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:33:10,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:10,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:33:10,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832694444] [2020-10-27 18:33:10,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:33:10,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:33:10,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929797205] [2020-10-27 18:33:10,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:33:10,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:33:10,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:33:10,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:33:10,780 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-27 18:33:16,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:33:16,987 INFO L93 Difference]: Finished difference Result 1229 states and 2206 transitions. [2020-10-27 18:33:16,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:33:16,990 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-27 18:33:16,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:33:17,018 INFO L225 Difference]: With dead ends: 1229 [2020-10-27 18:33:17,018 INFO L226 Difference]: Without dead ends: 709 [2020-10-27 18:33:17,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:33:17,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2020-10-27 18:33:17,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 695. [2020-10-27 18:33:17,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-10-27 18:33:17,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1081 transitions. [2020-10-27 18:33:17,160 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1081 transitions. Word has length 47 [2020-10-27 18:33:17,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:33:17,161 INFO L481 AbstractCegarLoop]: Abstraction has 695 states and 1081 transitions. [2020-10-27 18:33:17,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:33:17,161 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1081 transitions. [2020-10-27 18:33:17,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 18:33:17,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:33:17,173 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:33:17,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:33:17,174 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:33:17,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:33:17,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1576645745, now seen corresponding path program 1 times [2020-10-27 18:33:17,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:33:17,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696092986] [2020-10-27 18:33:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:33:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:17,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:17,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:18,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:18,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:19,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:19,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 18:33:19,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:33:19,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1829 [2020-10-27 18:33:19,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:19,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:33:19,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-27 18:33:19,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 18:33:19,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:33:19,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:33:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:19,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:19,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:19,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:33:19,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:33:19,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:33:19,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:19,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:33:19,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:33:19,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:33:19,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:33:19,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:33:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:19,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:19,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:19,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 18:33:19,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:33:19,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-27 18:33:19,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:19,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:33:19,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:33:19,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 18:33:19,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:33:19,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696092986] [2020-10-27 18:33:19,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:33:19,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:33:19,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472314611] [2020-10-27 18:33:19,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:33:19,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:33:19,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:33:19,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:33:19,605 INFO L87 Difference]: Start difference. First operand 695 states and 1081 transitions. Second operand 5 states. [2020-10-27 18:33:27,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:33:27,210 INFO L93 Difference]: Finished difference Result 1112 states and 1768 transitions. [2020-10-27 18:33:27,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:33:27,215 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-10-27 18:33:27,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:33:27,222 INFO L225 Difference]: With dead ends: 1112 [2020-10-27 18:33:27,223 INFO L226 Difference]: Without dead ends: 701 [2020-10-27 18:33:27,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:33:27,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2020-10-27 18:33:27,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 695. [2020-10-27 18:33:27,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-10-27 18:33:27,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1079 transitions. [2020-10-27 18:33:27,277 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1079 transitions. Word has length 117 [2020-10-27 18:33:27,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:33:27,280 INFO L481 AbstractCegarLoop]: Abstraction has 695 states and 1079 transitions. [2020-10-27 18:33:27,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:33:27,280 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1079 transitions. [2020-10-27 18:33:27,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-27 18:33:27,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:33:27,291 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:33:27,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:33:27,292 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:33:27,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:33:27,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1079952179, now seen corresponding path program 1 times [2020-10-27 18:33:27,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:33:27,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212737045] [2020-10-27 18:33:27,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:33:27,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:27,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:27,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:28,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:29,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:29,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:29,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-27 18:33:29,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:33:29,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1904 [2020-10-27 18:33:29,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:29,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:33:29,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-27 18:33:29,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 18:33:29,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:29,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:33:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:29,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:29,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:29,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:33:29,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:33:29,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:33:29,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:29,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:33:29,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:33:29,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:33:29,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:29,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:33:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:29,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:29,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:29,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 18:33:29,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:33:29,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-27 18:33:29,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:29,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:33:29,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:33:29,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 18:33:29,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:33:29,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212737045] [2020-10-27 18:33:29,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:33:29,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:33:29,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174257647] [2020-10-27 18:33:29,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:33:29,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:33:29,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:33:29,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:33:29,579 INFO L87 Difference]: Start difference. First operand 695 states and 1079 transitions. Second operand 5 states. [2020-10-27 18:33:38,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:33:38,848 INFO L93 Difference]: Finished difference Result 1697 states and 2710 transitions. [2020-10-27 18:33:38,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:33:38,849 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2020-10-27 18:33:38,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:33:38,856 INFO L225 Difference]: With dead ends: 1697 [2020-10-27 18:33:38,856 INFO L226 Difference]: Without dead ends: 1008 [2020-10-27 18:33:38,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:33:38,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2020-10-27 18:33:38,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 1006. [2020-10-27 18:33:38,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1006 states. [2020-10-27 18:33:38,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1360 transitions. [2020-10-27 18:33:38,896 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1360 transitions. Word has length 119 [2020-10-27 18:33:38,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:33:38,896 INFO L481 AbstractCegarLoop]: Abstraction has 1006 states and 1360 transitions. [2020-10-27 18:33:38,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:33:38,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1360 transitions. [2020-10-27 18:33:38,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-27 18:33:38,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:33:38,899 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:33:38,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:33:38,899 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:33:38,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:33:38,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1561592916, now seen corresponding path program 1 times [2020-10-27 18:33:38,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:33:38,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628627130] [2020-10-27 18:33:38,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:33:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:38,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:39,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:39,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:39,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-27 18:33:39,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:33:39,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1027 [2020-10-27 18:33:39,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:39,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:33:39,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-27 18:33:39,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 18:33:39,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:40,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:33:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:40,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:40,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:40,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:33:40,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:33:40,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:33:40,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:40,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:33:40,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:33:40,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:33:40,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:40,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:33:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:40,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:40,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:40,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 18:33:40,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:33:40,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-27 18:33:40,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:40,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:33:40,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:33:40,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 18:33:40,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:33:40,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628627130] [2020-10-27 18:33:40,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:33:40,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:33:40,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062970290] [2020-10-27 18:33:40,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:33:40,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:33:40,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:33:40,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:33:40,357 INFO L87 Difference]: Start difference. First operand 1006 states and 1360 transitions. Second operand 6 states. [2020-10-27 18:33:52,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:33:52,825 INFO L93 Difference]: Finished difference Result 2330 states and 3499 transitions. [2020-10-27 18:33:52,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 18:33:52,827 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2020-10-27 18:33:52,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:33:52,837 INFO L225 Difference]: With dead ends: 2330 [2020-10-27 18:33:52,838 INFO L226 Difference]: Without dead ends: 1639 [2020-10-27 18:33:52,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:33:52,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2020-10-27 18:33:52,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1639. [2020-10-27 18:33:52,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1639 states. [2020-10-27 18:33:52,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 2260 transitions. [2020-10-27 18:33:52,901 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 2260 transitions. Word has length 130 [2020-10-27 18:33:52,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:33:52,902 INFO L481 AbstractCegarLoop]: Abstraction has 1639 states and 2260 transitions. [2020-10-27 18:33:52,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:33:52,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 2260 transitions. [2020-10-27 18:33:52,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-27 18:33:52,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:33:52,905 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:33:52,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:33:52,906 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:33:52,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:33:52,906 INFO L82 PathProgramCache]: Analyzing trace with hash -576279598, now seen corresponding path program 1 times [2020-10-27 18:33:52,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:33:52,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081631595] [2020-10-27 18:33:52,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:33:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:52,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:53,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:54,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:54,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-27 18:33:54,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:33:54,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1672 [2020-10-27 18:33:54,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:54,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:33:54,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-27 18:33:54,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 18:33:54,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:54,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:33:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:54,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:54,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:54,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:33:54,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:33:54,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:33:54,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:54,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:33:54,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:33:54,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:33:54,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:33:54,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:33:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:54,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:54,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:54,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 18:33:54,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:33:54,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-27 18:33:54,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:54,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:33:54,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:33:54,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-27 18:33:54,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:33:55,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081631595] [2020-10-27 18:33:55,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:33:55,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:33:55,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448111518] [2020-10-27 18:33:55,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:33:55,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:33:55,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:33:55,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:33:55,046 INFO L87 Difference]: Start difference. First operand 1639 states and 2260 transitions. Second operand 5 states. [2020-10-27 18:34:03,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:34:03,302 INFO L93 Difference]: Finished difference Result 4203 states and 6003 transitions. [2020-10-27 18:34:03,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:34:03,310 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 163 [2020-10-27 18:34:03,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:34:03,328 INFO L225 Difference]: With dead ends: 4203 [2020-10-27 18:34:03,328 INFO L226 Difference]: Without dead ends: 2879 [2020-10-27 18:34:03,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:34:03,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2020-10-27 18:34:03,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2877. [2020-10-27 18:34:03,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2877 states. [2020-10-27 18:34:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 3662 transitions. [2020-10-27 18:34:03,451 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 3662 transitions. Word has length 163 [2020-10-27 18:34:03,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:34:03,452 INFO L481 AbstractCegarLoop]: Abstraction has 2877 states and 3662 transitions. [2020-10-27 18:34:03,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:34:03,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 3662 transitions. [2020-10-27 18:34:03,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-27 18:34:03,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:34:03,457 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:34:03,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:34:03,457 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:34:03,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:34:03,458 INFO L82 PathProgramCache]: Analyzing trace with hash -288050960, now seen corresponding path program 1 times [2020-10-27 18:34:03,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:34:03,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425747991] [2020-10-27 18:34:03,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:34:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:03,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:03,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:03,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:06,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:08,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:08,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-27 18:34:08,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:34:08,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 18:34:08,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:08,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:34:08,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 175 [2020-10-27 18:34:08,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 18:34:08,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:08,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:34:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:08,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:08,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:08,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:34:08,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:08,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:34:08,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:08,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:34:08,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:08,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:34:08,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:08,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:34:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:08,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:08,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:08,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 18:34:08,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:08,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 18:34:08,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:08,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:34:08,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:08,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:34:08,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:08,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-27 18:34:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:08,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:08,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:08,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 18:34:08,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:08,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-27 18:34:08,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:08,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:34:08,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:08,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 18:34:08,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-27 18:34:08,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425747991] [2020-10-27 18:34:08,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:34:08,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:34:08,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322267170] [2020-10-27 18:34:08,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:34:08,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:34:08,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:34:08,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:34:08,950 INFO L87 Difference]: Start difference. First operand 2877 states and 3662 transitions. Second operand 5 states. [2020-10-27 18:34:24,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:34:24,020 INFO L93 Difference]: Finished difference Result 6733 states and 8905 transitions. [2020-10-27 18:34:24,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:34:24,021 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 210 [2020-10-27 18:34:24,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:34:24,052 INFO L225 Difference]: With dead ends: 6733 [2020-10-27 18:34:24,052 INFO L226 Difference]: Without dead ends: 4171 [2020-10-27 18:34:24,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:34:24,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4171 states. [2020-10-27 18:34:24,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4171 to 4167. [2020-10-27 18:34:24,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4167 states. [2020-10-27 18:34:24,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4167 states to 4167 states and 5440 transitions. [2020-10-27 18:34:24,238 INFO L78 Accepts]: Start accepts. Automaton has 4167 states and 5440 transitions. Word has length 210 [2020-10-27 18:34:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:34:24,240 INFO L481 AbstractCegarLoop]: Abstraction has 4167 states and 5440 transitions. [2020-10-27 18:34:24,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:34:24,240 INFO L276 IsEmpty]: Start isEmpty. Operand 4167 states and 5440 transitions. [2020-10-27 18:34:24,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-27 18:34:24,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:34:24,247 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:34:24,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:34:24,247 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:34:24,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:34:24,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1439765132, now seen corresponding path program 1 times [2020-10-27 18:34:24,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:34:24,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744452760] [2020-10-27 18:34:24,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:34:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:24,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:24,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:24,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:25,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:29,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:29,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-27 18:34:29,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:34:29,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 18:34:29,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:29,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 18:34:29,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-27 18:34:29,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-27 18:34:29,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:29,592 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-27 18:34:29,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:34:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:29,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:29,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:29,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:34:29,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:29,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:34:29,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:29,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:34:29,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:29,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:34:29,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:34:29,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:34:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:29,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:29,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:29,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 18:34:29,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:29,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-27 18:34:29,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:29,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:34:29,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:29,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 18:34:29,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:34:29,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-27 18:34:29,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:29,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:29,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:30,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:30,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:30,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 18:34:30,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:34:30,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 971 [2020-10-27 18:34:30,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:30,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:34:30,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:34:30,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 18:34:30,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 142 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:34:31,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744452760] [2020-10-27 18:34:31,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:34:31,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 18:34:31,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737378868] [2020-10-27 18:34:31,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 18:34:31,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:34:31,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 18:34:31,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 18:34:31,111 INFO L87 Difference]: Start difference. First operand 4167 states and 5440 transitions. Second operand 9 states. [2020-10-27 18:34:48,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:34:48,348 INFO L93 Difference]: Finished difference Result 10892 states and 14842 transitions. [2020-10-27 18:34:48,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 18:34:48,350 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 229 [2020-10-27 18:34:48,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:34:48,397 INFO L225 Difference]: With dead ends: 10892 [2020-10-27 18:34:48,397 INFO L226 Difference]: Without dead ends: 6724 [2020-10-27 18:34:48,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-27 18:34:48,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6724 states. [2020-10-27 18:34:48,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6724 to 6675. [2020-10-27 18:34:48,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6675 states. [2020-10-27 18:34:48,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6675 states to 6675 states and 8954 transitions. [2020-10-27 18:34:48,694 INFO L78 Accepts]: Start accepts. Automaton has 6675 states and 8954 transitions. Word has length 229 [2020-10-27 18:34:48,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:34:48,695 INFO L481 AbstractCegarLoop]: Abstraction has 6675 states and 8954 transitions. [2020-10-27 18:34:48,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 18:34:48,695 INFO L276 IsEmpty]: Start isEmpty. Operand 6675 states and 8954 transitions. [2020-10-27 18:34:48,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-27 18:34:48,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:34:48,703 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:34:48,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:34:48,704 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:34:48,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:34:48,705 INFO L82 PathProgramCache]: Analyzing trace with hash 10965578, now seen corresponding path program 1 times [2020-10-27 18:34:48,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:34:48,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142949745] [2020-10-27 18:34:48,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:34:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:48,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:48,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:49,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:49,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:49,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:52,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:53,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:53,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 246 [2020-10-27 18:34:53,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 18:34:53,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 18:34:53,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:53,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 18:34:53,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-10-27 18:34:53,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-27 18:34:53,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:53,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:34:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:53,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:53,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:53,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:34:53,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:53,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:34:53,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:53,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:34:53,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:53,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:34:53,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:54,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:34:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:54,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:54,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:54,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 18:34:54,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:54,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-27 18:34:54,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:54,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:34:54,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:54,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 18:34:54,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:54,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-10-27 18:34:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:54,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:54,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:54,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:54,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 18:34:54,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:34:54,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 490 [2020-10-27 18:34:54,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:54,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:34:54,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:34:54,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 18:34:54,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 149 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:34:54,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142949745] [2020-10-27 18:34:54,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:34:54,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 18:34:54,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497433283] [2020-10-27 18:34:54,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:34:54,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:34:54,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:34:54,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:34:54,878 INFO L87 Difference]: Start difference. First operand 6675 states and 8954 transitions. Second operand 8 states. [2020-10-27 18:35:14,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:35:14,794 INFO L93 Difference]: Finished difference Result 10938 states and 14750 transitions. [2020-10-27 18:35:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 18:35:14,796 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 232 [2020-10-27 18:35:14,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:35:14,835 INFO L225 Difference]: With dead ends: 10938 [2020-10-27 18:35:14,835 INFO L226 Difference]: Without dead ends: 6727 [2020-10-27 18:35:14,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:35:14,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6727 states. [2020-10-27 18:35:15,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6727 to 6679. [2020-10-27 18:35:15,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6679 states. [2020-10-27 18:35:15,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6679 states to 6679 states and 8959 transitions. [2020-10-27 18:35:15,068 INFO L78 Accepts]: Start accepts. Automaton has 6679 states and 8959 transitions. Word has length 232 [2020-10-27 18:35:15,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:35:15,068 INFO L481 AbstractCegarLoop]: Abstraction has 6679 states and 8959 transitions. [2020-10-27 18:35:15,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 18:35:15,068 INFO L276 IsEmpty]: Start isEmpty. Operand 6679 states and 8959 transitions. [2020-10-27 18:35:15,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-27 18:35:15,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:35:15,079 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:35:15,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:35:15,080 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:35:15,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:35:15,080 INFO L82 PathProgramCache]: Analyzing trace with hash -371395095, now seen corresponding path program 1 times [2020-10-27 18:35:15,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:35:15,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31125920] [2020-10-27 18:35:15,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:35:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:15,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:15,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:15,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:15,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:16,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:18,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:19,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:20,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:20,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 283 [2020-10-27 18:35:20,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 18:35:20,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 18:35:20,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:20,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:20,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 132 [2020-10-27 18:35:20,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 18:35:20,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:20,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:35:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:20,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:20,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:20,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:35:20,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:20,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 18:35:20,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:20,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:20,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:20,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:20,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:20,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:35:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:20,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:20,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:20,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 18:35:20,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:20,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-27 18:35:20,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:20,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:35:20,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:20,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-27 18:35:20,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:20,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-27 18:35:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:20,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:20,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:20,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 18:35:20,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:20,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-27 18:35:20,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:20,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:20,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:35:20,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 18:35:20,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:35:20,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31125920] [2020-10-27 18:35:20,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:35:20,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:35:20,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125867009] [2020-10-27 18:35:20,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:35:20,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:35:20,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:35:20,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:35:20,769 INFO L87 Difference]: Start difference. First operand 6679 states and 8959 transitions. Second operand 7 states. [2020-10-27 18:35:32,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:35:32,378 INFO L93 Difference]: Finished difference Result 14718 states and 20444 transitions. [2020-10-27 18:35:32,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 18:35:32,380 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 269 [2020-10-27 18:35:32,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:35:32,427 INFO L225 Difference]: With dead ends: 14718 [2020-10-27 18:35:32,427 INFO L226 Difference]: Without dead ends: 8354 [2020-10-27 18:35:32,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:35:32,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8354 states. [2020-10-27 18:35:32,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8354 to 8342. [2020-10-27 18:35:32,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8342 states. [2020-10-27 18:35:32,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8342 states to 8342 states and 11171 transitions. [2020-10-27 18:35:32,783 INFO L78 Accepts]: Start accepts. Automaton has 8342 states and 11171 transitions. Word has length 269 [2020-10-27 18:35:32,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:35:32,784 INFO L481 AbstractCegarLoop]: Abstraction has 8342 states and 11171 transitions. [2020-10-27 18:35:32,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:35:32,784 INFO L276 IsEmpty]: Start isEmpty. Operand 8342 states and 11171 transitions. [2020-10-27 18:35:32,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-27 18:35:32,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:35:32,799 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:35:32,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 18:35:32,799 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:35:32,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:35:32,801 INFO L82 PathProgramCache]: Analyzing trace with hash 719294294, now seen corresponding path program 1 times [2020-10-27 18:35:32,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:35:32,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194372737] [2020-10-27 18:35:32,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:35:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:32,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:33,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:33,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:33,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:35,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:36,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:36,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:37,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:37,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 285 [2020-10-27 18:35:37,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 18:35:37,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 18:35:37,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:37,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:37,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 236 [2020-10-27 18:35:37,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 18:35:37,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:38,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:35:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:38,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:38,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:38,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:35:38,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:38,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:35:38,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:38,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:38,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:38,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:38,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:38,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:35:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:38,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:38,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:38,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 18:35:38,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:38,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-27 18:35:38,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:38,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:38,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:38,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:38,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:38,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-27 18:35:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:38,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:38,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:38,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 18:35:38,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:38,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-27 18:35:38,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:38,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:35:38,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:38,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 18:35:38,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:38,538 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-27 18:35:38,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194372737] [2020-10-27 18:35:38,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:35:38,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:35:38,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986519792] [2020-10-27 18:35:38,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:35:38,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:35:38,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:35:38,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:35:38,541 INFO L87 Difference]: Start difference. First operand 8342 states and 11171 transitions. Second operand 5 states. [2020-10-27 18:35:52,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:35:52,935 INFO L93 Difference]: Finished difference Result 21380 states and 29037 transitions. [2020-10-27 18:35:52,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:35:52,937 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 271 [2020-10-27 18:35:52,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:35:53,014 INFO L225 Difference]: With dead ends: 21380 [2020-10-27 18:35:53,014 INFO L226 Difference]: Without dead ends: 13353 [2020-10-27 18:35:53,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:35:53,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13353 states. [2020-10-27 18:35:53,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13353 to 13337. [2020-10-27 18:35:53,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13337 states. [2020-10-27 18:35:53,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13337 states to 13337 states and 17319 transitions. [2020-10-27 18:35:53,476 INFO L78 Accepts]: Start accepts. Automaton has 13337 states and 17319 transitions. Word has length 271 [2020-10-27 18:35:53,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:35:53,477 INFO L481 AbstractCegarLoop]: Abstraction has 13337 states and 17319 transitions. [2020-10-27 18:35:53,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:35:53,477 INFO L276 IsEmpty]: Start isEmpty. Operand 13337 states and 17319 transitions. [2020-10-27 18:35:53,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-10-27 18:35:53,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:35:53,493 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:35:53,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 18:35:53,493 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:35:53,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:35:53,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1285884140, now seen corresponding path program 1 times [2020-10-27 18:35:53,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:35:53,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748635697] [2020-10-27 18:35:53,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:35:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:53,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:53,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:54,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:57,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:57,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-27 18:35:57,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:35:57,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3640 [2020-10-27 18:35:57,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:57,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:57,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-27 18:35:57,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 18:35:57,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:57,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:35:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:57,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:57,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:57,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:35:57,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:57,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:35:57,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:57,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:57,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:57,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:57,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:57,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:35:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:57,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:57,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:57,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 18:35:57,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:57,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-27 18:35:57,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:57,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:35:57,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:57,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-27 18:35:57,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:57,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-27 18:35:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:57,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:57,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:57,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 18:35:57,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:57,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-27 18:35:57,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:57,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:57,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:35:57,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 18:35:57,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:35:57,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748635697] [2020-10-27 18:35:57,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:35:57,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:35:57,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913500154] [2020-10-27 18:35:57,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:35:57,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:35:57,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:35:57,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:35:57,783 INFO L87 Difference]: Start difference. First operand 13337 states and 17319 transitions. Second operand 7 states. [2020-10-27 18:35:57,939 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-27 18:36:08,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:36:08,376 INFO L93 Difference]: Finished difference Result 26408 states and 34535 transitions. [2020-10-27 18:36:08,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 18:36:08,378 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 275 [2020-10-27 18:36:08,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:36:08,448 INFO L225 Difference]: With dead ends: 26408 [2020-10-27 18:36:08,448 INFO L226 Difference]: Without dead ends: 13386 [2020-10-27 18:36:08,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:36:08,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13386 states. [2020-10-27 18:36:08,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13386 to 13352. [2020-10-27 18:36:08,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13352 states. [2020-10-27 18:36:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13352 states to 13352 states and 16782 transitions. [2020-10-27 18:36:08,846 INFO L78 Accepts]: Start accepts. Automaton has 13352 states and 16782 transitions. Word has length 275 [2020-10-27 18:36:08,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:36:08,847 INFO L481 AbstractCegarLoop]: Abstraction has 13352 states and 16782 transitions. [2020-10-27 18:36:08,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:36:08,847 INFO L276 IsEmpty]: Start isEmpty. Operand 13352 states and 16782 transitions. [2020-10-27 18:36:08,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-10-27 18:36:08,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:36:08,860 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:36:08,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 18:36:08,860 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:36:08,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:36:08,861 INFO L82 PathProgramCache]: Analyzing trace with hash -582054256, now seen corresponding path program 1 times [2020-10-27 18:36:08,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:36:08,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928506963] [2020-10-27 18:36:08,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:36:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:08,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:09,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:09,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:12,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:12,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:13,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:13,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 294 [2020-10-27 18:36:13,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:36:13,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 18:36:13,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:13,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:36:13,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 142 [2020-10-27 18:36:13,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-27 18:36:13,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:14,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:36:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:14,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:14,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:14,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:36:14,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:14,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 18:36:14,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:14,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:36:14,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:14,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:36:14,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:14,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:36:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:14,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:14,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:14,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 18:36:14,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:14,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-27 18:36:14,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:14,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:36:14,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:14,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-27 18:36:14,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:14,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-10-27 18:36:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:14,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:14,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:14,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:14,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 18:36:14,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:36:14,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-27 18:36:14,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:14,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:36:14,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:36:14,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 18:36:14,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:14,580 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 131 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 18:36:14,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928506963] [2020-10-27 18:36:14,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:36:14,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:36:14,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839305884] [2020-10-27 18:36:14,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:36:14,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:36:14,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:36:14,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:36:14,583 INFO L87 Difference]: Start difference. First operand 13352 states and 16782 transitions. Second operand 6 states. [2020-10-27 18:36:26,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:36:26,574 INFO L93 Difference]: Finished difference Result 34441 states and 47047 transitions. [2020-10-27 18:36:26,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 18:36:26,576 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 280 [2020-10-27 18:36:26,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:36:26,765 INFO L225 Difference]: With dead ends: 34441 [2020-10-27 18:36:26,765 INFO L226 Difference]: Without dead ends: 21404 [2020-10-27 18:36:26,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:36:26,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21404 states. [2020-10-27 18:36:27,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21404 to 21204. [2020-10-27 18:36:27,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21204 states. [2020-10-27 18:36:27,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21204 states to 21204 states and 26283 transitions. [2020-10-27 18:36:27,274 INFO L78 Accepts]: Start accepts. Automaton has 21204 states and 26283 transitions. Word has length 280 [2020-10-27 18:36:27,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:36:27,274 INFO L481 AbstractCegarLoop]: Abstraction has 21204 states and 26283 transitions. [2020-10-27 18:36:27,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:36:27,274 INFO L276 IsEmpty]: Start isEmpty. Operand 21204 states and 26283 transitions. [2020-10-27 18:36:27,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-10-27 18:36:27,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:36:27,290 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:36:27,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 18:36:27,290 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:36:27,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:36:27,291 INFO L82 PathProgramCache]: Analyzing trace with hash 848881248, now seen corresponding path program 1 times [2020-10-27 18:36:27,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:36:27,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780591466] [2020-10-27 18:36:27,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:36:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:27,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:27,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:27,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:27,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:29,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:32,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:32,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:32,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-27 18:36:32,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 18:36:32,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 18:36:32,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:32,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:36:32,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-10-27 18:36:32,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 18:36:32,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:32,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:36:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:32,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:32,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:32,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:36:32,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:32,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:36:32,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:32,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:36:32,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:32,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:36:32,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:32,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:36:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:32,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:32,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:32,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 18:36:32,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:32,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 18:36:32,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:32,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:36:32,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:32,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:36:32,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:32,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-10-27 18:36:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:32,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:32,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:32,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 18:36:32,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:32,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-27 18:36:32,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:32,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:36:32,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:32,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 18:36:32,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:32,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-10-27 18:36:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:32,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:32,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:32,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 18:36:32,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:32,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-27 18:36:32,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:32,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:36:32,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:36:32,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 18:36:32,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:32,975 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 267 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-27 18:36:32,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780591466] [2020-10-27 18:36:32,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:36:32,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:36:32,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092330366] [2020-10-27 18:36:32,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:36:32,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:36:32,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:36:32,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:36:32,979 INFO L87 Difference]: Start difference. First operand 21204 states and 26283 transitions. Second operand 7 states.