/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/locks/test_locks_13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:52:40,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:52:40,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:52:40,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:52:40,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:52:40,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:52:40,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:52:40,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:52:40,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:52:40,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:52:40,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:52:40,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:52:40,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:52:40,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:52:40,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:52:40,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:52:40,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:52:40,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:52:40,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:52:40,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:52:40,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:52:40,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:52:40,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:52:40,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:52:40,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:52:40,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:52:40,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:52:40,671 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:52:40,672 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:52:40,673 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:52:40,674 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:52:40,675 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:52:40,676 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:52:40,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:52:40,678 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:52:40,678 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:52:40,679 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:52:40,679 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:52:40,680 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:52:40,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:52:40,681 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:52:40,683 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:52:40,709 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:52:40,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:52:40,711 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:52:40,712 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:52:40,712 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:52:40,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:52:40,712 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:52:40,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:52:40,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:52:40,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:52:40,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:52:40,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:52:40,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:52:40,714 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:52:40,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:52:40,714 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:52:40,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:52:40,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:52:40,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:52:40,716 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:52:40,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:52:40,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:52:40,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:52:40,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:52:40,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:52:40,717 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:52:40,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:52:40,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:52:40,718 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:52:40,718 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:52:41,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:52:41,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:52:41,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:52:41,170 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:52:41,175 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:52:41,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_13.c [2020-10-28 14:52:41,263 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0961cf6ee/13872696d3c24b58a8fb059aeb29d7f3/FLAG90a04204f [2020-10-28 14:52:41,971 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:52:41,971 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_13.c [2020-10-28 14:52:42,002 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0961cf6ee/13872696d3c24b58a8fb059aeb29d7f3/FLAG90a04204f [2020-10-28 14:52:42,331 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0961cf6ee/13872696d3c24b58a8fb059aeb29d7f3 [2020-10-28 14:52:42,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:52:42,345 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:52:42,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:52:42,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:52:42,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:52:42,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:52:42" (1/1) ... [2020-10-28 14:52:42,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bcd79c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:52:42, skipping insertion in model container [2020-10-28 14:52:42,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:52:42" (1/1) ... [2020-10-28 14:52:42,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:52:42,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:52:42,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:52:42,595 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:52:42,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:52:42,644 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:52:42,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:52:42 WrapperNode [2020-10-28 14:52:42,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:52:42,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:52:42,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:52:42,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:52:42,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:52:42" (1/1) ... [2020-10-28 14:52:42,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:52:42" (1/1) ... [2020-10-28 14:52:42,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:52:42" (1/1) ... [2020-10-28 14:52:42,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:52:42" (1/1) ... [2020-10-28 14:52:42,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:52:42" (1/1) ... [2020-10-28 14:52:42,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:52:42" (1/1) ... [2020-10-28 14:52:42,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:52:42" (1/1) ... [2020-10-28 14:52:42,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:52:42,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:52:42,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:52:42,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:52:42,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:52:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:52:42,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:52:42,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:52:42,846 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:52:42,846 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:52:42,846 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:52:42,846 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:52:42,847 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:52:42,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:52:42,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:52:42,847 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:52:42,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:52:42,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:52:42,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:52:42,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:52:42,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:52:42,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:52:43,341 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:52:43,341 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:52:43,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:52:43 BoogieIcfgContainer [2020-10-28 14:52:43,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:52:43,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:52:43,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:52:43,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:52:43,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:52:42" (1/3) ... [2020-10-28 14:52:43,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bbe5573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:52:43, skipping insertion in model container [2020-10-28 14:52:43,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:52:42" (2/3) ... [2020-10-28 14:52:43,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bbe5573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:52:43, skipping insertion in model container [2020-10-28 14:52:43,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:52:43" (3/3) ... [2020-10-28 14:52:43,362 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_13.c [2020-10-28 14:52:43,378 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:52:43,386 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:52:43,404 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:52:43,446 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:52:43,446 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:52:43,446 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:52:43,446 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:52:43,447 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:52:43,447 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:52:43,447 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:52:43,447 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:52:43,470 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-10-28 14:52:43,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:52:43,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:43,483 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] [2020-10-28 14:52:43,483 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:43,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:43,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1393377580, now seen corresponding path program 1 times [2020-10-28 14:52:43,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:43,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598824980] [2020-10-28 14:52:43,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:43,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:44,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:44,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:52:44,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:44,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-10-28 14:52:44,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:44,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:44,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:44,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:52:44,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:52:44,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:52:44,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:44,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:44,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:44,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:44,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:44,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 14:52:44,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:44,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:44,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:44,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:44,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:44,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:52:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:44,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598824980] [2020-10-28 14:52:44,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:44,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:44,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403660544] [2020-10-28 14:52:44,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:44,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:44,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:44,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:44,254 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 4 states. [2020-10-28 14:52:44,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:44,580 INFO L93 Difference]: Finished difference Result 110 states and 193 transitions. [2020-10-28 14:52:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:44,582 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-28 14:52:44,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:44,595 INFO L225 Difference]: With dead ends: 110 [2020-10-28 14:52:44,595 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 14:52:44,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:44,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 14:52:44,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 64. [2020-10-28 14:52:44,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 14:52:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 115 transitions. [2020-10-28 14:52:44,653 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 115 transitions. Word has length 25 [2020-10-28 14:52:44,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:44,654 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 115 transitions. [2020-10-28 14:52:44,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:44,654 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 115 transitions. [2020-10-28 14:52:44,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:52:44,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:44,656 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] [2020-10-28 14:52:44,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:52:44,656 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:44,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:44,657 INFO L82 PathProgramCache]: Analyzing trace with hash -194970322, now seen corresponding path program 1 times [2020-10-28 14:52:44,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:44,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862887936] [2020-10-28 14:52:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:44,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:44,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:44,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:44,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:52:44,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:44,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-28 14:52:44,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:44,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:44,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:44,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:52:44,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:52:44,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:52:44,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:44,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:44,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:44,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:44,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:44,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:52:44,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:44,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:44,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:44,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:44,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:44,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:52:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:44,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862887936] [2020-10-28 14:52:44,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:44,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:44,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927361271] [2020-10-28 14:52:44,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:44,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:44,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:44,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:44,914 INFO L87 Difference]: Start difference. First operand 64 states and 115 transitions. Second operand 4 states. [2020-10-28 14:52:45,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:45,191 INFO L93 Difference]: Finished difference Result 149 states and 275 transitions. [2020-10-28 14:52:45,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:45,192 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-28 14:52:45,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:45,194 INFO L225 Difference]: With dead ends: 149 [2020-10-28 14:52:45,194 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 14:52:45,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:45,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 14:52:45,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-28 14:52:45,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 14:52:45,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 163 transitions. [2020-10-28 14:52:45,211 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 163 transitions. Word has length 25 [2020-10-28 14:52:45,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:45,211 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 163 transitions. [2020-10-28 14:52:45,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:45,212 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 163 transitions. [2020-10-28 14:52:45,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:52:45,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:45,213 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] [2020-10-28 14:52:45,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:52:45,213 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:45,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:45,214 INFO L82 PathProgramCache]: Analyzing trace with hash 251610282, now seen corresponding path program 1 times [2020-10-28 14:52:45,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:45,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918363660] [2020-10-28 14:52:45,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:45,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:45,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:45,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:45,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:52:45,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:52:45,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-28 14:52:45,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:45,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:45,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:45,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:52:45,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:52:45,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:52:45,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:45,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:45,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:45,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:45,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:45,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:52:45,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:45,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:45,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:45,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:45,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:45,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:52:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:45,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918363660] [2020-10-28 14:52:45,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:45,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:45,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219842270] [2020-10-28 14:52:45,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:45,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:45,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:45,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:45,552 INFO L87 Difference]: Start difference. First operand 90 states and 163 transitions. Second operand 4 states. [2020-10-28 14:52:45,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:45,771 INFO L93 Difference]: Finished difference Result 254 states and 472 transitions. [2020-10-28 14:52:45,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:45,772 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-28 14:52:45,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:45,774 INFO L225 Difference]: With dead ends: 254 [2020-10-28 14:52:45,774 INFO L226 Difference]: Without dead ends: 170 [2020-10-28 14:52:45,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:45,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-28 14:52:45,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-10-28 14:52:45,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-28 14:52:45,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 310 transitions. [2020-10-28 14:52:45,792 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 310 transitions. Word has length 26 [2020-10-28 14:52:45,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:45,793 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 310 transitions. [2020-10-28 14:52:45,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:45,793 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 310 transitions. [2020-10-28 14:52:45,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:52:45,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:45,795 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] [2020-10-28 14:52:45,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:52:45,795 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:45,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:45,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1839958184, now seen corresponding path program 1 times [2020-10-28 14:52:45,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:45,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552615294] [2020-10-28 14:52:45,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:45,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:45,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:46,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:46,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:52:46,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:52:46,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-28 14:52:46,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:46,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:46,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:46,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:52:46,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:52:46,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 14:52:46,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:46,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:46,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:46,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:46,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:46,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:52:46,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:46,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:46,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:46,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:46,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:46,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:52:46,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:46,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552615294] [2020-10-28 14:52:46,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:46,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:46,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920175975] [2020-10-28 14:52:46,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:46,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:46,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:46,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:46,154 INFO L87 Difference]: Start difference. First operand 169 states and 310 transitions. Second operand 4 states. [2020-10-28 14:52:46,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:46,349 INFO L93 Difference]: Finished difference Result 221 states and 405 transitions. [2020-10-28 14:52:46,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:46,349 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-28 14:52:46,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:46,351 INFO L225 Difference]: With dead ends: 221 [2020-10-28 14:52:46,351 INFO L226 Difference]: Without dead ends: 218 [2020-10-28 14:52:46,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:46,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-28 14:52:46,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 169. [2020-10-28 14:52:46,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-28 14:52:46,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 308 transitions. [2020-10-28 14:52:46,369 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 308 transitions. Word has length 26 [2020-10-28 14:52:46,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:46,370 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 308 transitions. [2020-10-28 14:52:46,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:46,370 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 308 transitions. [2020-10-28 14:52:46,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:52:46,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:46,371 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] [2020-10-28 14:52:46,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:52:46,372 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:46,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:46,375 INFO L82 PathProgramCache]: Analyzing trace with hash -783427017, now seen corresponding path program 1 times [2020-10-28 14:52:46,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:46,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595803474] [2020-10-28 14:52:46,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:46,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:46,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:46,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:46,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:52:46,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:52:46,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-28 14:52:46,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:46,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:46,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:46,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:52:46,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:52:46,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:52:46,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:46,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:46,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:46,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:46,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:46,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:52:46,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:46,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:46,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:46,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:46,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:46,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:52:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:46,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595803474] [2020-10-28 14:52:46,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:46,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:46,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863202120] [2020-10-28 14:52:46,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:46,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:46,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:46,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:46,681 INFO L87 Difference]: Start difference. First operand 169 states and 308 transitions. Second operand 4 states. [2020-10-28 14:52:46,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:46,863 INFO L93 Difference]: Finished difference Result 321 states and 591 transitions. [2020-10-28 14:52:46,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:46,864 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-28 14:52:46,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:46,866 INFO L225 Difference]: With dead ends: 321 [2020-10-28 14:52:46,867 INFO L226 Difference]: Without dead ends: 318 [2020-10-28 14:52:46,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:46,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-28 14:52:46,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 229. [2020-10-28 14:52:46,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-28 14:52:46,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 416 transitions. [2020-10-28 14:52:46,901 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 416 transitions. Word has length 27 [2020-10-28 14:52:46,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:46,902 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 416 transitions. [2020-10-28 14:52:46,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:46,903 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 416 transitions. [2020-10-28 14:52:46,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:52:46,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:46,907 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] [2020-10-28 14:52:46,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:52:46,908 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:46,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:46,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1923192377, now seen corresponding path program 1 times [2020-10-28 14:52:46,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:46,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328399587] [2020-10-28 14:52:46,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:46,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:46,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:47,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:47,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:52:47,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:52:47,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-28 14:52:47,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:47,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:47,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:47,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:52:47,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:52:47,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:52:47,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:47,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:47,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:47,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:47,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:47,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:47,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:52:47,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:47,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:47,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:47,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:47,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:47,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 14:52:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:47,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328399587] [2020-10-28 14:52:47,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:47,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:47,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576355327] [2020-10-28 14:52:47,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:47,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:47,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:47,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:47,149 INFO L87 Difference]: Start difference. First operand 229 states and 416 transitions. Second operand 4 states. [2020-10-28 14:52:47,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:47,358 INFO L93 Difference]: Finished difference Result 549 states and 1007 transitions. [2020-10-28 14:52:47,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:47,360 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-28 14:52:47,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:47,365 INFO L225 Difference]: With dead ends: 549 [2020-10-28 14:52:47,365 INFO L226 Difference]: Without dead ends: 326 [2020-10-28 14:52:47,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:47,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-28 14:52:47,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 325. [2020-10-28 14:52:47,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-28 14:52:47,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 588 transitions. [2020-10-28 14:52:47,391 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 588 transitions. Word has length 27 [2020-10-28 14:52:47,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:47,393 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 588 transitions. [2020-10-28 14:52:47,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:47,393 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 588 transitions. [2020-10-28 14:52:47,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:52:47,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:47,401 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] [2020-10-28 14:52:47,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:52:47,401 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:47,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:47,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1490165653, now seen corresponding path program 1 times [2020-10-28 14:52:47,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:47,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130295940] [2020-10-28 14:52:47,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:47,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:47,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:47,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:47,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:47,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:52:47,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:52:47,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-28 14:52:47,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:47,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:47,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:47,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:52:47,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:52:47,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:52:47,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:47,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:47,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:47,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:47,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:47,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:52:47,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:47,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:47,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:47,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:47,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:47,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:52:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:47,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130295940] [2020-10-28 14:52:47,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:47,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:47,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22936219] [2020-10-28 14:52:47,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:47,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:47,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:47,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:47,797 INFO L87 Difference]: Start difference. First operand 325 states and 588 transitions. Second operand 4 states. [2020-10-28 14:52:48,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:48,030 INFO L93 Difference]: Finished difference Result 613 states and 1119 transitions. [2020-10-28 14:52:48,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:48,030 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-28 14:52:48,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:48,034 INFO L225 Difference]: With dead ends: 613 [2020-10-28 14:52:48,034 INFO L226 Difference]: Without dead ends: 610 [2020-10-28 14:52:48,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:48,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-10-28 14:52:48,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 449. [2020-10-28 14:52:48,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2020-10-28 14:52:48,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 804 transitions. [2020-10-28 14:52:48,053 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 804 transitions. Word has length 28 [2020-10-28 14:52:48,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:48,054 INFO L481 AbstractCegarLoop]: Abstraction has 449 states and 804 transitions. [2020-10-28 14:52:48,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:48,054 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 804 transitions. [2020-10-28 14:52:48,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:52:48,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:48,055 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] [2020-10-28 14:52:48,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:52:48,056 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:48,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:48,056 INFO L82 PathProgramCache]: Analyzing trace with hash -98182249, now seen corresponding path program 1 times [2020-10-28 14:52:48,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:48,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247464013] [2020-10-28 14:52:48,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:48,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:48,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:48,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:48,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:48,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:52:48,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:52:48,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-28 14:52:48,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:48,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:48,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:48,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:52:48,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:52:48,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:48,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:48,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:48,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:48,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:48,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:48,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:52:48,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:48,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:48,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:48,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:48,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:48,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:52:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:48,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247464013] [2020-10-28 14:52:48,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:48,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:48,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359285059] [2020-10-28 14:52:48,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:48,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:48,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:48,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:48,320 INFO L87 Difference]: Start difference. First operand 449 states and 804 transitions. Second operand 4 states. [2020-10-28 14:52:48,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:48,541 INFO L93 Difference]: Finished difference Result 1077 states and 1943 transitions. [2020-10-28 14:52:48,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:48,541 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-28 14:52:48,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:48,545 INFO L225 Difference]: With dead ends: 1077 [2020-10-28 14:52:48,545 INFO L226 Difference]: Without dead ends: 634 [2020-10-28 14:52:48,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:48,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2020-10-28 14:52:48,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 633. [2020-10-28 14:52:48,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2020-10-28 14:52:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1128 transitions. [2020-10-28 14:52:48,576 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1128 transitions. Word has length 28 [2020-10-28 14:52:48,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:48,577 INFO L481 AbstractCegarLoop]: Abstraction has 633 states and 1128 transitions. [2020-10-28 14:52:48,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:48,577 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1128 transitions. [2020-10-28 14:52:48,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:52:48,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:48,578 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] [2020-10-28 14:52:48,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:52:48,579 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:48,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:48,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1042895038, now seen corresponding path program 1 times [2020-10-28 14:52:48,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:48,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27275199] [2020-10-28 14:52:48,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:48,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:48,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:48,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:48,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:48,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:48,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:52:48,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:52:48,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-28 14:52:48,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:48,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:48,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:48,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:52:48,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:52:48,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:49,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:49,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:49,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:49,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:49,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:49,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:49,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:52:49,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:49,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:49,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:49,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:49,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:49,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:49,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27275199] [2020-10-28 14:52:49,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:49,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:49,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003285897] [2020-10-28 14:52:49,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:49,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:49,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:49,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:49,043 INFO L87 Difference]: Start difference. First operand 633 states and 1128 transitions. Second operand 4 states. [2020-10-28 14:52:49,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:49,245 INFO L93 Difference]: Finished difference Result 1181 states and 2123 transitions. [2020-10-28 14:52:49,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:49,246 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-28 14:52:49,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:49,255 INFO L225 Difference]: With dead ends: 1181 [2020-10-28 14:52:49,256 INFO L226 Difference]: Without dead ends: 1178 [2020-10-28 14:52:49,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:49,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2020-10-28 14:52:49,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 889. [2020-10-28 14:52:49,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 889 states. [2020-10-28 14:52:49,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1560 transitions. [2020-10-28 14:52:49,300 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1560 transitions. Word has length 29 [2020-10-28 14:52:49,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:49,300 INFO L481 AbstractCegarLoop]: Abstraction has 889 states and 1560 transitions. [2020-10-28 14:52:49,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:49,300 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1560 transitions. [2020-10-28 14:52:49,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:52:49,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:49,304 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] [2020-10-28 14:52:49,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:52:49,304 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:49,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:49,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1663724356, now seen corresponding path program 1 times [2020-10-28 14:52:49,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:49,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327498070] [2020-10-28 14:52:49,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:49,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:49,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:49,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:49,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:49,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:49,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:52:49,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:52:49,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-28 14:52:49,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:49,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:49,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:49,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:52:49,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:52:49,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:49,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:49,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:49,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:49,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:49,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:49,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:52:49,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:49,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:49,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:49,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:49,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:49,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:49,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327498070] [2020-10-28 14:52:49,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:49,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:49,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834871678] [2020-10-28 14:52:49,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:49,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:49,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:49,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:49,765 INFO L87 Difference]: Start difference. First operand 889 states and 1560 transitions. Second operand 4 states. [2020-10-28 14:52:49,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:49,946 INFO L93 Difference]: Finished difference Result 1342 states and 2351 transitions. [2020-10-28 14:52:49,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:49,947 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-28 14:52:49,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:49,953 INFO L225 Difference]: With dead ends: 1342 [2020-10-28 14:52:49,953 INFO L226 Difference]: Without dead ends: 907 [2020-10-28 14:52:49,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:49,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2020-10-28 14:52:49,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 906. [2020-10-28 14:52:49,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 906 states. [2020-10-28 14:52:49,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1568 transitions. [2020-10-28 14:52:49,993 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1568 transitions. Word has length 29 [2020-10-28 14:52:49,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:49,994 INFO L481 AbstractCegarLoop]: Abstraction has 906 states and 1568 transitions. [2020-10-28 14:52:49,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:49,994 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1568 transitions. [2020-10-28 14:52:49,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:52:49,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:49,996 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] [2020-10-28 14:52:49,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:52:49,997 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:49,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:49,997 INFO L82 PathProgramCache]: Analyzing trace with hash -330420350, now seen corresponding path program 1 times [2020-10-28 14:52:49,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:49,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221140873] [2020-10-28 14:52:49,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:50,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:50,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:50,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:50,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:50,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:52:50,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:52:50,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-28 14:52:50,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:50,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:52:50,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:52:50,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:50,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:50,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:50,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:50,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:50,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:50,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:52:50,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:50,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:50,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:50,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:50,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:50,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:52:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:50,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221140873] [2020-10-28 14:52:50,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:50,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:50,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71555080] [2020-10-28 14:52:50,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:50,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:50,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:50,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:50,259 INFO L87 Difference]: Start difference. First operand 906 states and 1568 transitions. Second operand 4 states. [2020-10-28 14:52:50,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:50,492 INFO L93 Difference]: Finished difference Result 2142 states and 3731 transitions. [2020-10-28 14:52:50,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:50,493 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-28 14:52:50,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:50,503 INFO L225 Difference]: With dead ends: 2142 [2020-10-28 14:52:50,503 INFO L226 Difference]: Without dead ends: 1259 [2020-10-28 14:52:50,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:50,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2020-10-28 14:52:50,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1258. [2020-10-28 14:52:50,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1258 states. [2020-10-28 14:52:50,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 2168 transitions. [2020-10-28 14:52:50,614 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 2168 transitions. Word has length 29 [2020-10-28 14:52:50,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:50,614 INFO L481 AbstractCegarLoop]: Abstraction has 1258 states and 2168 transitions. [2020-10-28 14:52:50,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:50,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 2168 transitions. [2020-10-28 14:52:50,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:52:50,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:50,617 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] [2020-10-28 14:52:50,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:52:50,617 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:50,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:50,618 INFO L82 PathProgramCache]: Analyzing trace with hash 347668994, now seen corresponding path program 1 times [2020-10-28 14:52:50,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:50,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239416988] [2020-10-28 14:52:50,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:50,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:50,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:50,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:50,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:50,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:50,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:52:50,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:52:50,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-28 14:52:50,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:50,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:50,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:50,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:52:50,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:52:50,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:51,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:51,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:51,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:51,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:51,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:51,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:52:51,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:51,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:51,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:51,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:51,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:51,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:52:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:51,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239416988] [2020-10-28 14:52:51,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:51,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:51,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819309] [2020-10-28 14:52:51,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:51,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:51,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:51,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:51,032 INFO L87 Difference]: Start difference. First operand 1258 states and 2168 transitions. Second operand 4 states. [2020-10-28 14:52:51,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:51,267 INFO L93 Difference]: Finished difference Result 2302 states and 4011 transitions. [2020-10-28 14:52:51,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:51,267 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-28 14:52:51,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:51,281 INFO L225 Difference]: With dead ends: 2302 [2020-10-28 14:52:51,281 INFO L226 Difference]: Without dead ends: 2299 [2020-10-28 14:52:51,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:51,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2299 states. [2020-10-28 14:52:51,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2299 to 1786. [2020-10-28 14:52:51,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1786 states. [2020-10-28 14:52:51,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 3016 transitions. [2020-10-28 14:52:51,372 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 3016 transitions. Word has length 30 [2020-10-28 14:52:51,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:51,372 INFO L481 AbstractCegarLoop]: Abstraction has 1786 states and 3016 transitions. [2020-10-28 14:52:51,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:51,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 3016 transitions. [2020-10-28 14:52:51,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:52:51,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:51,375 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] [2020-10-28 14:52:51,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:52:51,376 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:51,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:51,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1240678908, now seen corresponding path program 1 times [2020-10-28 14:52:51,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:51,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501158382] [2020-10-28 14:52:51,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:51,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:51,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:51,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:51,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:51,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:51,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:52:51,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:52:51,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-28 14:52:51,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:51,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:51,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:51,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:52:51,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:52:51,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:52:51,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:51,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:51,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:51,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:51,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:51,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:52:51,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:51,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:51,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:51,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:51,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:51,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:52:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:51,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501158382] [2020-10-28 14:52:51,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:51,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:51,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586762249] [2020-10-28 14:52:51,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:51,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:51,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:51,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:51,785 INFO L87 Difference]: Start difference. First operand 1786 states and 3016 transitions. Second operand 4 states. [2020-10-28 14:52:52,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:52,059 INFO L93 Difference]: Finished difference Result 2654 states and 4467 transitions. [2020-10-28 14:52:52,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:52,059 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-28 14:52:52,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:52,073 INFO L225 Difference]: With dead ends: 2654 [2020-10-28 14:52:52,073 INFO L226 Difference]: Without dead ends: 1787 [2020-10-28 14:52:52,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:52,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2020-10-28 14:52:52,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1786. [2020-10-28 14:52:52,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1786 states. [2020-10-28 14:52:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 2968 transitions. [2020-10-28 14:52:52,170 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 2968 transitions. Word has length 30 [2020-10-28 14:52:52,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:52,170 INFO L481 AbstractCegarLoop]: Abstraction has 1786 states and 2968 transitions. [2020-10-28 14:52:52,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:52,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 2968 transitions. [2020-10-28 14:52:52,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:52:52,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:52,174 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] [2020-10-28 14:52:52,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:52:52,174 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:52,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:52,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1021824190, now seen corresponding path program 1 times [2020-10-28 14:52:52,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:52,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016840535] [2020-10-28 14:52:52,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:52,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:52,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:52,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:52,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:52,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:52:52,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:52:52,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-28 14:52:52,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:52,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:52,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:52,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:52:52,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:52:52,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:52,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:52,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:52,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:52,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:52,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:52,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:52:52,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:52,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:52,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:52,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:52,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:52,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:52,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016840535] [2020-10-28 14:52:52,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:52,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:52,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368286988] [2020-10-28 14:52:52,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:52,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:52,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:52,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:52,398 INFO L87 Difference]: Start difference. First operand 1786 states and 2968 transitions. Second operand 4 states. [2020-10-28 14:52:52,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:52,594 INFO L93 Difference]: Finished difference Result 2654 states and 4395 transitions. [2020-10-28 14:52:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:52,595 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-28 14:52:52,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:52,605 INFO L225 Difference]: With dead ends: 2654 [2020-10-28 14:52:52,605 INFO L226 Difference]: Without dead ends: 1787 [2020-10-28 14:52:52,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:52,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2020-10-28 14:52:52,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1786. [2020-10-28 14:52:52,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1786 states. [2020-10-28 14:52:52,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 2920 transitions. [2020-10-28 14:52:52,675 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 2920 transitions. Word has length 30 [2020-10-28 14:52:52,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:52,676 INFO L481 AbstractCegarLoop]: Abstraction has 1786 states and 2920 transitions. [2020-10-28 14:52:52,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:52,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 2920 transitions. [2020-10-28 14:52:52,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:52:52,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:52,679 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] [2020-10-28 14:52:52,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:52:52,679 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:52,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:52,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1839472640, now seen corresponding path program 1 times [2020-10-28 14:52:52,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:52,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902607770] [2020-10-28 14:52:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:52,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:52,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:52,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:52,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:52:52,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:52:52,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-28 14:52:52,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:52,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:52,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:52,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:52:52,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:52:52,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:52,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:52,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:52,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:52,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:52,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:52,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:52:52,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:52,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:52,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:52,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:52,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:52,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 23 [2020-10-28 14:52:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:52,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902607770] [2020-10-28 14:52:52,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:52,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:52,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508163171] [2020-10-28 14:52:52,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:52,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:52,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:52,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:52,840 INFO L87 Difference]: Start difference. First operand 1786 states and 2920 transitions. Second operand 4 states. [2020-10-28 14:52:53,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:53,062 INFO L93 Difference]: Finished difference Result 4222 states and 6955 transitions. [2020-10-28 14:52:53,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:53,062 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-28 14:52:53,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:53,076 INFO L225 Difference]: With dead ends: 4222 [2020-10-28 14:52:53,076 INFO L226 Difference]: Without dead ends: 2459 [2020-10-28 14:52:53,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:53,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2020-10-28 14:52:53,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2458. [2020-10-28 14:52:53,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2458 states. [2020-10-28 14:52:53,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2458 states to 2458 states and 4008 transitions. [2020-10-28 14:52:53,171 INFO L78 Accepts]: Start accepts. Automaton has 2458 states and 4008 transitions. Word has length 30 [2020-10-28 14:52:53,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:53,171 INFO L481 AbstractCegarLoop]: Abstraction has 2458 states and 4008 transitions. [2020-10-28 14:52:53,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:53,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2458 states and 4008 transitions. [2020-10-28 14:52:53,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:52:53,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:53,175 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] [2020-10-28 14:52:53,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:52:53,175 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:53,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:53,175 INFO L82 PathProgramCache]: Analyzing trace with hash 811698831, now seen corresponding path program 1 times [2020-10-28 14:52:53,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:53,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583413292] [2020-10-28 14:52:53,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:53,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:53,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:53,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:53,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:53,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:52:53,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:52:53,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-28 14:52:53,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:53,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:53,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:53,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 14:52:53,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:52:53,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:53,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:53,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:53,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:53,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:53,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:53,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:52:53,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:53,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:53,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:53,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:53,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:53,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:53,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583413292] [2020-10-28 14:52:53,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:53,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:53,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190229448] [2020-10-28 14:52:53,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:53,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:53,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:53,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:53,377 INFO L87 Difference]: Start difference. First operand 2458 states and 4008 transitions. Second operand 4 states. [2020-10-28 14:52:53,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:53,665 INFO L93 Difference]: Finished difference Result 4446 states and 7371 transitions. [2020-10-28 14:52:53,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:53,665 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-28 14:52:53,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:53,688 INFO L225 Difference]: With dead ends: 4446 [2020-10-28 14:52:53,689 INFO L226 Difference]: Without dead ends: 4443 [2020-10-28 14:52:53,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:53,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4443 states. [2020-10-28 14:52:53,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4443 to 3546. [2020-10-28 14:52:53,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3546 states. [2020-10-28 14:52:53,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 5640 transitions. [2020-10-28 14:52:53,839 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 5640 transitions. Word has length 31 [2020-10-28 14:52:53,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:53,840 INFO L481 AbstractCegarLoop]: Abstraction has 3546 states and 5640 transitions. [2020-10-28 14:52:53,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:53,840 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 5640 transitions. [2020-10-28 14:52:53,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:52:53,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:53,845 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] [2020-10-28 14:52:53,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:52:53,846 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:53,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:53,846 INFO L82 PathProgramCache]: Analyzing trace with hash -776649071, now seen corresponding path program 1 times [2020-10-28 14:52:53,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:53,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042592602] [2020-10-28 14:52:53,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:53,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:53,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:53,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:54,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:54,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:52:54,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:52:54,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-28 14:52:54,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:54,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:54,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:54,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 14:52:54,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:52:54,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:54,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:54,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:54,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:54,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:54,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:54,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:52:54,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:54,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:54,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:54,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:54,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:54,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:54,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:54,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042592602] [2020-10-28 14:52:54,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:54,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:54,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870266521] [2020-10-28 14:52:54,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:54,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:54,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:54,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:54,047 INFO L87 Difference]: Start difference. First operand 3546 states and 5640 transitions. Second operand 4 states. [2020-10-28 14:52:54,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:54,313 INFO L93 Difference]: Finished difference Result 8350 states and 13387 transitions. [2020-10-28 14:52:54,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:54,314 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-28 14:52:54,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:54,338 INFO L225 Difference]: With dead ends: 8350 [2020-10-28 14:52:54,339 INFO L226 Difference]: Without dead ends: 4827 [2020-10-28 14:52:54,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:54,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4827 states. [2020-10-28 14:52:54,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4827 to 4826. [2020-10-28 14:52:54,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4826 states. [2020-10-28 14:52:54,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7656 transitions. [2020-10-28 14:52:54,550 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7656 transitions. Word has length 31 [2020-10-28 14:52:54,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:54,551 INFO L481 AbstractCegarLoop]: Abstraction has 4826 states and 7656 transitions. [2020-10-28 14:52:54,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:54,551 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7656 transitions. [2020-10-28 14:52:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:52:54,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:54,557 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] [2020-10-28 14:52:54,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:52:54,557 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:54,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:54,558 INFO L82 PathProgramCache]: Analyzing trace with hash -600498327, now seen corresponding path program 1 times [2020-10-28 14:52:54,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:54,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105899904] [2020-10-28 14:52:54,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:54,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:54,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:54,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:54,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:54,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:54,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:52:54,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:52:54,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-28 14:52:54,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:54,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:54,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:54,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:52:54,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:52:54,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:54,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:54,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:54,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:54,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:54,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:54,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:54,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:52:54,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:54,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:54,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:54,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:54,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:54,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:52:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:54,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105899904] [2020-10-28 14:52:54,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:54,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:54,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153373271] [2020-10-28 14:52:54,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:54,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:54,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:54,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:54,952 INFO L87 Difference]: Start difference. First operand 4826 states and 7656 transitions. Second operand 4 states. [2020-10-28 14:52:55,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:55,308 INFO L93 Difference]: Finished difference Result 8606 states and 13867 transitions. [2020-10-28 14:52:55,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:55,308 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-28 14:52:55,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:55,349 INFO L225 Difference]: With dead ends: 8606 [2020-10-28 14:52:55,349 INFO L226 Difference]: Without dead ends: 8603 [2020-10-28 14:52:55,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:55,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8603 states. [2020-10-28 14:52:55,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8603 to 7066. [2020-10-28 14:52:55,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7066 states. [2020-10-28 14:52:55,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7066 states to 7066 states and 10920 transitions. [2020-10-28 14:52:55,582 INFO L78 Accepts]: Start accepts. Automaton has 7066 states and 10920 transitions. Word has length 32 [2020-10-28 14:52:55,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:55,583 INFO L481 AbstractCegarLoop]: Abstraction has 7066 states and 10920 transitions. [2020-10-28 14:52:55,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:55,583 INFO L276 IsEmpty]: Start isEmpty. Operand 7066 states and 10920 transitions. [2020-10-28 14:52:55,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:52:55,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:55,595 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] [2020-10-28 14:52:55,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:52:55,596 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:55,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:55,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2106121067, now seen corresponding path program 1 times [2020-10-28 14:52:55,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:55,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375382414] [2020-10-28 14:52:55,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:55,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:55,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:55,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:55,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:55,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:55,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:52:55,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:52:55,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-28 14:52:55,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:55,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:55,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:55,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:52:55,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:52:55,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:52:55,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:55,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:55,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:55,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:55,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:55,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:52:55,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:55,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:55,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:55,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:55,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:55,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:55,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375382414] [2020-10-28 14:52:55,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:55,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:55,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988515368] [2020-10-28 14:52:55,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:55,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:55,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:55,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:55,996 INFO L87 Difference]: Start difference. First operand 7066 states and 10920 transitions. Second operand 4 states. [2020-10-28 14:52:56,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:56,274 INFO L93 Difference]: Finished difference Result 10574 states and 16299 transitions. [2020-10-28 14:52:56,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:56,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-28 14:52:56,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:56,292 INFO L225 Difference]: With dead ends: 10574 [2020-10-28 14:52:56,293 INFO L226 Difference]: Without dead ends: 7115 [2020-10-28 14:52:56,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:56,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7115 states. [2020-10-28 14:52:56,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7115 to 7114. [2020-10-28 14:52:56,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7114 states. [2020-10-28 14:52:56,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7114 states to 7114 states and 10824 transitions. [2020-10-28 14:52:56,539 INFO L78 Accepts]: Start accepts. Automaton has 7114 states and 10824 transitions. Word has length 32 [2020-10-28 14:52:56,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:56,539 INFO L481 AbstractCegarLoop]: Abstraction has 7114 states and 10824 transitions. [2020-10-28 14:52:56,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:56,540 INFO L276 IsEmpty]: Start isEmpty. Operand 7114 states and 10824 transitions. [2020-10-28 14:52:56,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:52:56,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:56,550 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] [2020-10-28 14:52:56,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:52:56,550 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:56,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:56,551 INFO L82 PathProgramCache]: Analyzing trace with hash 417177325, now seen corresponding path program 1 times [2020-10-28 14:52:56,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:56,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321372979] [2020-10-28 14:52:56,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:56,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:56,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:56,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:56,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:56,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:52:56,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:52:56,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-28 14:52:56,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:56,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:56,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:56,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:52:56,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:52:56,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:52:56,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:56,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:56,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:56,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:56,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:56,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:52:56,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:56,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:56,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:56,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:56,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:56,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:56,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321372979] [2020-10-28 14:52:56,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:56,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:56,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886888470] [2020-10-28 14:52:56,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:56,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:56,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:56,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:56,848 INFO L87 Difference]: Start difference. First operand 7114 states and 10824 transitions. Second operand 4 states. [2020-10-28 14:52:57,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:57,166 INFO L93 Difference]: Finished difference Result 10574 states and 16011 transitions. [2020-10-28 14:52:57,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:57,167 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-28 14:52:57,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:57,184 INFO L225 Difference]: With dead ends: 10574 [2020-10-28 14:52:57,184 INFO L226 Difference]: Without dead ends: 7115 [2020-10-28 14:52:57,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:57,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7115 states. [2020-10-28 14:52:57,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7115 to 7114. [2020-10-28 14:52:57,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7114 states. [2020-10-28 14:52:57,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7114 states to 7114 states and 10632 transitions. [2020-10-28 14:52:57,437 INFO L78 Accepts]: Start accepts. Automaton has 7114 states and 10632 transitions. Word has length 32 [2020-10-28 14:52:57,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:57,438 INFO L481 AbstractCegarLoop]: Abstraction has 7114 states and 10632 transitions. [2020-10-28 14:52:57,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:57,438 INFO L276 IsEmpty]: Start isEmpty. Operand 7114 states and 10632 transitions. [2020-10-28 14:52:57,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:52:57,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:57,449 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] [2020-10-28 14:52:57,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:52:57,450 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:57,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:57,450 INFO L82 PathProgramCache]: Analyzing trace with hash -400471125, now seen corresponding path program 1 times [2020-10-28 14:52:57,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:57,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161208352] [2020-10-28 14:52:57,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:57,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:57,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:57,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:57,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:52:57,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:52:57,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-28 14:52:57,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:57,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:57,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:57,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 14:52:57,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:52:57,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:57,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:57,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:57,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:57,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:57,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:57,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:52:57,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:57,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:57,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:57,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:57,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:57,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:57,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:57,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161208352] [2020-10-28 14:52:57,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:57,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:57,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055712371] [2020-10-28 14:52:57,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:57,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:57,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:57,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:57,602 INFO L87 Difference]: Start difference. First operand 7114 states and 10632 transitions. Second operand 4 states. [2020-10-28 14:52:57,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:57,915 INFO L93 Difference]: Finished difference Result 10638 states and 15851 transitions. [2020-10-28 14:52:57,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:57,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-28 14:52:57,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:57,932 INFO L225 Difference]: With dead ends: 10638 [2020-10-28 14:52:57,932 INFO L226 Difference]: Without dead ends: 7179 [2020-10-28 14:52:57,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:57,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7179 states. [2020-10-28 14:52:58,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7179 to 7178. [2020-10-28 14:52:58,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7178 states. [2020-10-28 14:52:58,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7178 states to 7178 states and 10568 transitions. [2020-10-28 14:52:58,154 INFO L78 Accepts]: Start accepts. Automaton has 7178 states and 10568 transitions. Word has length 32 [2020-10-28 14:52:58,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:58,157 INFO L481 AbstractCegarLoop]: Abstraction has 7178 states and 10568 transitions. [2020-10-28 14:52:58,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:58,157 INFO L276 IsEmpty]: Start isEmpty. Operand 7178 states and 10568 transitions. [2020-10-28 14:52:58,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:52:58,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:58,168 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] [2020-10-28 14:52:58,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:52:58,168 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:58,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:58,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1900351465, now seen corresponding path program 1 times [2020-10-28 14:52:58,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:58,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659353929] [2020-10-28 14:52:58,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:58,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:58,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:58,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:52:58,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:58,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 14:52:58,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:58,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:58,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:58,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:52:58,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:52:58,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:58,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:58,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:58,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:58,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:58,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:58,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:52:58,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:58,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:58,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:58,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:58,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:58,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:58,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659353929] [2020-10-28 14:52:58,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:58,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:58,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427529055] [2020-10-28 14:52:58,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:58,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:58,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:58,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:58,270 INFO L87 Difference]: Start difference. First operand 7178 states and 10568 transitions. Second operand 4 states. [2020-10-28 14:52:58,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:58,616 INFO L93 Difference]: Finished difference Result 16654 states and 24651 transitions. [2020-10-28 14:52:58,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:58,617 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-28 14:52:58,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:58,636 INFO L225 Difference]: With dead ends: 16654 [2020-10-28 14:52:58,636 INFO L226 Difference]: Without dead ends: 9611 [2020-10-28 14:52:58,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:58,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9611 states. [2020-10-28 14:52:58,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9611 to 9610. [2020-10-28 14:52:58,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9610 states. [2020-10-28 14:52:58,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9610 states to 9610 states and 14088 transitions. [2020-10-28 14:52:58,989 INFO L78 Accepts]: Start accepts. Automaton has 9610 states and 14088 transitions. Word has length 32 [2020-10-28 14:52:58,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:58,989 INFO L481 AbstractCegarLoop]: Abstraction has 9610 states and 14088 transitions. [2020-10-28 14:52:58,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:58,989 INFO L276 IsEmpty]: Start isEmpty. Operand 9610 states and 14088 transitions. [2020-10-28 14:52:59,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:52:59,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:59,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:52:59,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:52:59,001 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:59,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:59,001 INFO L82 PathProgramCache]: Analyzing trace with hash 782150236, now seen corresponding path program 1 times [2020-10-28 14:52:59,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:59,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530117807] [2020-10-28 14:52:59,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:59,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:59,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:59,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:59,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:52:59,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:52:59,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-28 14:52:59,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:59,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:59,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:59,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:52:59,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:52:59,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:59,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:59,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:59,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:59,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:59,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:59,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:52:59,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:59,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:59,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:59,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:59,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:59,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:59,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530117807] [2020-10-28 14:52:59,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:59,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:59,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57049129] [2020-10-28 14:52:59,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:59,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:59,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:59,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:59,161 INFO L87 Difference]: Start difference. First operand 9610 states and 14088 transitions. Second operand 4 states. [2020-10-28 14:52:59,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:59,690 INFO L93 Difference]: Finished difference Result 16782 states and 25099 transitions. [2020-10-28 14:52:59,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:59,691 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-28 14:52:59,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:59,793 INFO L225 Difference]: With dead ends: 16782 [2020-10-28 14:52:59,793 INFO L226 Difference]: Without dead ends: 16779 [2020-10-28 14:52:59,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:59,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16779 states. [2020-10-28 14:53:00,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16779 to 14218. [2020-10-28 14:53:00,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14218 states. [2020-10-28 14:53:00,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14218 states to 14218 states and 20232 transitions. [2020-10-28 14:53:00,206 INFO L78 Accepts]: Start accepts. Automaton has 14218 states and 20232 transitions. Word has length 33 [2020-10-28 14:53:00,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:00,206 INFO L481 AbstractCegarLoop]: Abstraction has 14218 states and 20232 transitions. [2020-10-28 14:53:00,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:00,206 INFO L276 IsEmpty]: Start isEmpty. Operand 14218 states and 20232 transitions. [2020-10-28 14:53:00,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:53:00,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:00,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:00,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:53:00,227 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:00,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:00,228 INFO L82 PathProgramCache]: Analyzing trace with hash -806197666, now seen corresponding path program 1 times [2020-10-28 14:53:00,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:00,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143849546] [2020-10-28 14:53:00,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:00,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:00,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:00,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:00,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:53:00,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:00,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-28 14:53:00,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:00,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:00,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:00,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:53:00,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:53:00,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:00,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:00,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:00,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:00,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:00,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:00,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:00,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:00,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:00,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:00,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:00,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:00,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:00,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:00,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:00,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143849546] [2020-10-28 14:53:00,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:00,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:00,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401386884] [2020-10-28 14:53:00,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:00,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:00,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:00,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:00,375 INFO L87 Difference]: Start difference. First operand 14218 states and 20232 transitions. Second operand 4 states. [2020-10-28 14:53:01,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:01,130 INFO L93 Difference]: Finished difference Result 32910 states and 47115 transitions. [2020-10-28 14:53:01,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:01,131 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-28 14:53:01,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:01,171 INFO L225 Difference]: With dead ends: 32910 [2020-10-28 14:53:01,172 INFO L226 Difference]: Without dead ends: 18827 [2020-10-28 14:53:01,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:01,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18827 states. [2020-10-28 14:53:01,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18827 to 18826. [2020-10-28 14:53:01,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18826 states. [2020-10-28 14:53:01,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18826 states to 18826 states and 26632 transitions. [2020-10-28 14:53:01,936 INFO L78 Accepts]: Start accepts. Automaton has 18826 states and 26632 transitions. Word has length 33 [2020-10-28 14:53:01,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:01,936 INFO L481 AbstractCegarLoop]: Abstraction has 18826 states and 26632 transitions. [2020-10-28 14:53:01,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:01,937 INFO L276 IsEmpty]: Start isEmpty. Operand 18826 states and 26632 transitions. [2020-10-28 14:53:01,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:53:01,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:01,960 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] [2020-10-28 14:53:01,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:53:01,962 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:01,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:01,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1516483630, now seen corresponding path program 1 times [2020-10-28 14:53:01,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:01,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692919583] [2020-10-28 14:53:01,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:01,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:01,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:01,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:02,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:02,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:02,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:53:02,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:02,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-28 14:53:02,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:02,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:02,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:02,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 14:53:02,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:53:02,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:02,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:02,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:02,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:02,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:02,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:02,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:02,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:02,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:02,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:02,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:02,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:02,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:02,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692919583] [2020-10-28 14:53:02,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:02,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:02,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090171424] [2020-10-28 14:53:02,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:02,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:02,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:02,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:02,187 INFO L87 Difference]: Start difference. First operand 18826 states and 26632 transitions. Second operand 4 states. [2020-10-28 14:53:03,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:03,062 INFO L93 Difference]: Finished difference Result 55694 states and 78347 transitions. [2020-10-28 14:53:03,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:03,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-28 14:53:03,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:03,149 INFO L225 Difference]: With dead ends: 55694 [2020-10-28 14:53:03,149 INFO L226 Difference]: Without dead ends: 37003 [2020-10-28 14:53:03,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:03,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37003 states. [2020-10-28 14:53:04,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37003 to 37002. [2020-10-28 14:53:04,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37002 states. [2020-10-28 14:53:04,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37002 states to 37002 states and 50952 transitions. [2020-10-28 14:53:04,406 INFO L78 Accepts]: Start accepts. Automaton has 37002 states and 50952 transitions. Word has length 34 [2020-10-28 14:53:04,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:04,406 INFO L481 AbstractCegarLoop]: Abstraction has 37002 states and 50952 transitions. [2020-10-28 14:53:04,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:04,406 INFO L276 IsEmpty]: Start isEmpty. Operand 37002 states and 50952 transitions. [2020-10-28 14:53:04,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:53:04,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:04,451 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] [2020-10-28 14:53:04,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:53:04,451 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:04,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:04,452 INFO L82 PathProgramCache]: Analyzing trace with hash 71864272, now seen corresponding path program 1 times [2020-10-28 14:53:04,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:04,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703699949] [2020-10-28 14:53:04,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:04,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:04,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:04,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:04,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:04,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:04,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:53:04,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:04,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-28 14:53:04,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:04,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:04,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:04,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 14:53:04,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:53:04,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:04,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:04,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:04,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:04,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:04,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:04,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 14:53:04,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:04,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:04,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:04,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:04,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:04,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:04,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:04,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703699949] [2020-10-28 14:53:04,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:04,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:04,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890197356] [2020-10-28 14:53:04,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:04,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:04,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:04,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:04,726 INFO L87 Difference]: Start difference. First operand 37002 states and 50952 transitions. Second operand 4 states. [2020-10-28 14:53:06,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:06,149 INFO L93 Difference]: Finished difference Result 41102 states and 58123 transitions. [2020-10-28 14:53:06,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:06,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-28 14:53:06,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:06,253 INFO L225 Difference]: With dead ends: 41102 [2020-10-28 14:53:06,253 INFO L226 Difference]: Without dead ends: 41099 [2020-10-28 14:53:06,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:06,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41099 states. [2020-10-28 14:53:07,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41099 to 37002. [2020-10-28 14:53:07,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37002 states. [2020-10-28 14:53:07,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37002 states to 37002 states and 50440 transitions. [2020-10-28 14:53:07,610 INFO L78 Accepts]: Start accepts. Automaton has 37002 states and 50440 transitions. Word has length 34 [2020-10-28 14:53:07,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:07,611 INFO L481 AbstractCegarLoop]: Abstraction has 37002 states and 50440 transitions. [2020-10-28 14:53:07,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:07,611 INFO L276 IsEmpty]: Start isEmpty. Operand 37002 states and 50440 transitions. [2020-10-28 14:53:07,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:53:07,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:07,668 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] [2020-10-28 14:53:07,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:53:07,669 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:07,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:07,672 INFO L82 PathProgramCache]: Analyzing trace with hash 240321127, now seen corresponding path program 1 times [2020-10-28 14:53:07,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:07,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352685980] [2020-10-28 14:53:07,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:07,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:07,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:07,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:07,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:07,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:53:07,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:07,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-28 14:53:07,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:07,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:07,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:07,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 14:53:07,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:53:07,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:07,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:07,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:07,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:07,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:07,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:07,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:07,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:07,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:07,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:07,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:07,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:07,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:07,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:07,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352685980] [2020-10-28 14:53:07,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:07,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:07,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553279985] [2020-10-28 14:53:07,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:07,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:07,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:07,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:07,860 INFO L87 Difference]: Start difference. First operand 37002 states and 50440 transitions. Second operand 4 states. [2020-10-28 14:53:09,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:09,074 INFO L93 Difference]: Finished difference Result 62606 states and 86283 transitions. [2020-10-28 14:53:09,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:09,074 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-28 14:53:09,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:09,162 INFO L225 Difference]: With dead ends: 62606 [2020-10-28 14:53:09,162 INFO L226 Difference]: Without dead ends: 62603 [2020-10-28 14:53:09,171 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 [2020-10-28 14:53:09,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62603 states. [2020-10-28 14:53:10,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62603 to 56458. [2020-10-28 14:53:10,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56458 states. [2020-10-28 14:53:10,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56458 states to 56458 states and 75016 transitions. [2020-10-28 14:53:10,991 INFO L78 Accepts]: Start accepts. Automaton has 56458 states and 75016 transitions. Word has length 35 [2020-10-28 14:53:10,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:10,991 INFO L481 AbstractCegarLoop]: Abstraction has 56458 states and 75016 transitions. [2020-10-28 14:53:10,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:10,991 INFO L276 IsEmpty]: Start isEmpty. Operand 56458 states and 75016 transitions. [2020-10-28 14:53:11,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:53:11,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:11,098 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] [2020-10-28 14:53:11,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:53:11,098 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:11,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:11,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1348026775, now seen corresponding path program 1 times [2020-10-28 14:53:11,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:11,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223495635] [2020-10-28 14:53:11,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:11,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:11,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:11,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:11,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:11,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:53:11,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:11,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-28 14:53:11,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:11,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:11,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:11,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:53:11,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:53:11,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:11,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:11,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:11,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:11,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:11,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:11,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:53:11,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:11,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:11,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:11,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:11,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:11,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:11,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223495635] [2020-10-28 14:53:11,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:11,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:11,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636038735] [2020-10-28 14:53:11,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:11,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:11,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:11,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:11,318 INFO L87 Difference]: Start difference. First operand 56458 states and 75016 transitions. Second operand 4 states. [2020-10-28 14:53:12,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:12,422 INFO L93 Difference]: Finished difference Result 84238 states and 111371 transitions. [2020-10-28 14:53:12,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:12,423 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-28 14:53:12,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:12,493 INFO L225 Difference]: With dead ends: 84238 [2020-10-28 14:53:12,493 INFO L226 Difference]: Without dead ends: 56587 [2020-10-28 14:53:12,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:12,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56587 states. [2020-10-28 14:53:14,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56587 to 56586. [2020-10-28 14:53:14,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56586 states. [2020-10-28 14:53:14,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56586 states to 56586 states and 73736 transitions. [2020-10-28 14:53:14,207 INFO L78 Accepts]: Start accepts. Automaton has 56586 states and 73736 transitions. Word has length 35 [2020-10-28 14:53:14,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:14,207 INFO L481 AbstractCegarLoop]: Abstraction has 56586 states and 73736 transitions. [2020-10-28 14:53:14,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:14,207 INFO L276 IsEmpty]: Start isEmpty. Operand 56586 states and 73736 transitions. [2020-10-28 14:53:14,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:53:14,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:14,262 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] [2020-10-28 14:53:14,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:53:14,263 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:14,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:14,264 INFO L82 PathProgramCache]: Analyzing trace with hash 2129292071, now seen corresponding path program 1 times [2020-10-28 14:53:14,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:14,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638923210] [2020-10-28 14:53:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:14,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:14,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:14,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:14,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:53:14,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:14,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-28 14:53:14,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:14,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:14,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:14,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:53:14,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:53:14,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:14,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:14,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:14,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:14,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:14,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:14,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:14,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:14,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:14,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:14,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:14,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:14,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:14,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638923210] [2020-10-28 14:53:14,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:14,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:14,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111695266] [2020-10-28 14:53:14,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:14,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:14,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:14,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:14,391 INFO L87 Difference]: Start difference. First operand 56586 states and 73736 transitions. Second operand 4 states. [2020-10-28 14:53:15,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:15,499 INFO L93 Difference]: Finished difference Result 84494 states and 109579 transitions. [2020-10-28 14:53:15,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:15,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-28 14:53:15,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:15,634 INFO L225 Difference]: With dead ends: 84494 [2020-10-28 14:53:15,634 INFO L226 Difference]: Without dead ends: 56843 [2020-10-28 14:53:15,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:15,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56843 states. [2020-10-28 14:53:16,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56843 to 56842. [2020-10-28 14:53:16,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56842 states. [2020-10-28 14:53:16,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56842 states to 56842 states and 72712 transitions. [2020-10-28 14:53:16,932 INFO L78 Accepts]: Start accepts. Automaton has 56842 states and 72712 transitions. Word has length 35 [2020-10-28 14:53:16,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:16,932 INFO L481 AbstractCegarLoop]: Abstraction has 56842 states and 72712 transitions. [2020-10-28 14:53:16,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:16,932 INFO L276 IsEmpty]: Start isEmpty. Operand 56842 states and 72712 transitions. [2020-10-28 14:53:17,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:53:17,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:17,161 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] [2020-10-28 14:53:17,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:53:17,162 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:17,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:17,162 INFO L82 PathProgramCache]: Analyzing trace with hash 440348329, now seen corresponding path program 1 times [2020-10-28 14:53:17,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:17,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881810864] [2020-10-28 14:53:17,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:17,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:17,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:53:17,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:17,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 14:53:17,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:17,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:17,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:17,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 14:53:17,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:53:17,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:17,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:17,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:17,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:17,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:17,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:17,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:17,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:17,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:17,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:17,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:17,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:17,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881810864] [2020-10-28 14:53:17,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:17,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:17,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961017174] [2020-10-28 14:53:17,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:17,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:17,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:17,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:17,268 INFO L87 Difference]: Start difference. First operand 56842 states and 72712 transitions. Second operand 4 states. [2020-10-28 14:53:18,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:18,679 INFO L93 Difference]: Finished difference Result 129550 states and 165899 transitions. [2020-10-28 14:53:18,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:18,679 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-28 14:53:18,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:18,767 INFO L225 Difference]: With dead ends: 129550 [2020-10-28 14:53:18,768 INFO L226 Difference]: Without dead ends: 73227 [2020-10-28 14:53:18,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:18,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73227 states. [2020-10-28 14:53:20,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73227 to 73226. [2020-10-28 14:53:20,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73226 states. [2020-10-28 14:53:20,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73226 states to 73226 states and 92168 transitions. [2020-10-28 14:53:20,819 INFO L78 Accepts]: Start accepts. Automaton has 73226 states and 92168 transitions. Word has length 35 [2020-10-28 14:53:20,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:20,819 INFO L481 AbstractCegarLoop]: Abstraction has 73226 states and 92168 transitions. [2020-10-28 14:53:20,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:20,819 INFO L276 IsEmpty]: Start isEmpty. Operand 73226 states and 92168 transitions. [2020-10-28 14:53:21,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:53:21,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:21,106 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] [2020-10-28 14:53:21,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:53:21,106 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:21,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:21,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1528242307, now seen corresponding path program 1 times [2020-10-28 14:53:21,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:21,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412077274] [2020-10-28 14:53:21,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:21,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:21,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:21,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:21,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:53:21,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:21,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-28 14:53:21,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:21,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:21,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:21,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 14:53:21,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:53:21,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:21,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:21,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:21,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:21,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:21,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:21,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:21,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:21,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:21,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:21,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:21,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:21,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:21,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412077274] [2020-10-28 14:53:21,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:21,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:21,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77543214] [2020-10-28 14:53:21,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:21,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:21,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:21,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:21,236 INFO L87 Difference]: Start difference. First operand 73226 states and 92168 transitions. Second operand 4 states. [2020-10-28 14:53:23,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:23,134 INFO L93 Difference]: Finished difference Result 121358 states and 153611 transitions. [2020-10-28 14:53:23,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:23,134 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-28 14:53:23,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:23,299 INFO L225 Difference]: With dead ends: 121358 [2020-10-28 14:53:23,300 INFO L226 Difference]: Without dead ends: 121355 [2020-10-28 14:53:23,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:23,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121355 states. [2020-10-28 14:53:25,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121355 to 113162. [2020-10-28 14:53:25,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113162 states. [2020-10-28 14:53:25,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113162 states to 113162 states and 139272 transitions. [2020-10-28 14:53:25,704 INFO L78 Accepts]: Start accepts. Automaton has 113162 states and 139272 transitions. Word has length 36 [2020-10-28 14:53:25,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:25,704 INFO L481 AbstractCegarLoop]: Abstraction has 113162 states and 139272 transitions. [2020-10-28 14:53:25,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:25,704 INFO L276 IsEmpty]: Start isEmpty. Operand 113162 states and 139272 transitions. [2020-10-28 14:53:25,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:53:25,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:25,768 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] [2020-10-28 14:53:25,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:53:25,768 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:25,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:25,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1178377087, now seen corresponding path program 1 times [2020-10-28 14:53:25,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:25,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257691436] [2020-10-28 14:53:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:25,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:25,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:26,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:26,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:53:26,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:26,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-28 14:53:26,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:26,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:26,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:26,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 14:53:26,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:53:26,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:26,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:26,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:26,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:26,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:26,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:26,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:26,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:26,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:26,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:26,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:26,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:26,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:26,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257691436] [2020-10-28 14:53:26,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:26,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:26,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383633292] [2020-10-28 14:53:26,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:26,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:26,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:26,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:26,223 INFO L87 Difference]: Start difference. First operand 113162 states and 139272 transitions. Second operand 4 states. [2020-10-28 14:53:27,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:27,925 INFO L93 Difference]: Finished difference Result 169998 states and 208907 transitions. [2020-10-28 14:53:27,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:27,925 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-28 14:53:27,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:28,076 INFO L225 Difference]: With dead ends: 169998 [2020-10-28 14:53:28,076 INFO L226 Difference]: Without dead ends: 114699 [2020-10-28 14:53:28,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:28,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114699 states. [2020-10-28 14:53:30,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114699 to 114698. [2020-10-28 14:53:30,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114698 states. [2020-10-28 14:53:30,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114698 states to 114698 states and 139272 transitions. [2020-10-28 14:53:30,702 INFO L78 Accepts]: Start accepts. Automaton has 114698 states and 139272 transitions. Word has length 36 [2020-10-28 14:53:30,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:30,702 INFO L481 AbstractCegarLoop]: Abstraction has 114698 states and 139272 transitions. [2020-10-28 14:53:30,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:30,702 INFO L276 IsEmpty]: Start isEmpty. Operand 114698 states and 139272 transitions. [2020-10-28 14:53:30,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:53:30,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:30,767 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] [2020-10-28 14:53:30,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:53:30,768 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:30,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:30,768 INFO L82 PathProgramCache]: Analyzing trace with hash -815767619, now seen corresponding path program 1 times [2020-10-28 14:53:30,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:30,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850944006] [2020-10-28 14:53:30,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:30,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:30,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:30,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:30,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:53:30,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:30,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 14:53:30,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:30,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:30,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:30,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 14:53:30,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:53:30,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:30,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:30,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:30,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:30,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:30,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:30,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:30,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:30,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:30,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:30,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:30,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:30,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:30,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850944006] [2020-10-28 14:53:30,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:30,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:30,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695630627] [2020-10-28 14:53:30,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:30,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:30,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:30,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:30,852 INFO L87 Difference]: Start difference. First operand 114698 states and 139272 transitions. Second operand 4 states. [2020-10-28 14:53:33,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:33,982 INFO L93 Difference]: Finished difference Result 258062 states and 311307 transitions. [2020-10-28 14:53:33,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:33,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-28 14:53:33,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:34,188 INFO L225 Difference]: With dead ends: 258062 [2020-10-28 14:53:34,189 INFO L226 Difference]: Without dead ends: 145419 [2020-10-28 14:53:34,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:34,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145419 states. [2020-10-28 14:53:37,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145419 to 145418. [2020-10-28 14:53:37,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145418 states. [2020-10-28 14:53:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145418 states to 145418 states and 172040 transitions. [2020-10-28 14:53:37,896 INFO L78 Accepts]: Start accepts. Automaton has 145418 states and 172040 transitions. Word has length 36 [2020-10-28 14:53:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:37,896 INFO L481 AbstractCegarLoop]: Abstraction has 145418 states and 172040 transitions. [2020-10-28 14:53:37,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 145418 states and 172040 transitions. [2020-10-28 14:53:37,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:53:37,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:37,980 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] [2020-10-28 14:53:37,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:53:37,980 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:37,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:37,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1813120460, now seen corresponding path program 1 times [2020-10-28 14:53:37,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:37,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580652482] [2020-10-28 14:53:37,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:37,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:38,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:38,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:38,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:38,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:53:38,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:38,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-28 14:53:38,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:38,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:38,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:38,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 14:53:38,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:53:38,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:38,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:38,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:38,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:38,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:38,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:38,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:38,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:38,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:38,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:38,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:38,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:38,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:38,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580652482] [2020-10-28 14:53:38,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:38,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:38,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842928838] [2020-10-28 14:53:38,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:38,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:38,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:38,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:38,127 INFO L87 Difference]: Start difference. First operand 145418 states and 172040 transitions. Second operand 4 states. [2020-10-28 14:53:42,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:42,149 INFO L93 Difference]: Finished difference Result 235533 states and 276490 transitions. [2020-10-28 14:53:42,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:42,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-10-28 14:53:42,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:42,485 INFO L225 Difference]: With dead ends: 235533 [2020-10-28 14:53:42,486 INFO L226 Difference]: Without dead ends: 235530 [2020-10-28 14:53:42,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:42,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235530 states. [2020-10-28 14:53:46,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235530 to 227338. [2020-10-28 14:53:46,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227338 states. [2020-10-28 14:53:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227338 states to 227338 states and 264200 transitions. [2020-10-28 14:53:47,260 INFO L78 Accepts]: Start accepts. Automaton has 227338 states and 264200 transitions. Word has length 37 [2020-10-28 14:53:47,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:47,261 INFO L481 AbstractCegarLoop]: Abstraction has 227338 states and 264200 transitions. [2020-10-28 14:53:47,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:47,261 INFO L276 IsEmpty]: Start isEmpty. Operand 227338 states and 264200 transitions. [2020-10-28 14:53:47,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:53:47,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:47,896 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] [2020-10-28 14:53:47,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:53:47,896 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:47,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:47,896 INFO L82 PathProgramCache]: Analyzing trace with hash 893498934, now seen corresponding path program 1 times [2020-10-28 14:53:47,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:47,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917160117] [2020-10-28 14:53:47,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:47,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:47,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:48,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:48,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:53:48,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:48,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-28 14:53:48,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:48,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:48,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:48,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 14:53:48,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:53:48,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:48,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:48,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:48,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:48,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:48,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:48,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:48,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:48,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:48,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:48,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:48,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:48,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:48,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917160117] [2020-10-28 14:53:48,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:48,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:48,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078926523] [2020-10-28 14:53:48,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:48,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:48,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:48,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:48,051 INFO L87 Difference]: Start difference. First operand 227338 states and 264200 transitions. Second operand 4 states. [2020-10-28 14:53:53,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:53,061 INFO L93 Difference]: Finished difference Result 509962 states and 587784 transitions. [2020-10-28 14:53:53,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:53,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-10-28 14:53:53,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:53,061 INFO L225 Difference]: With dead ends: 509962 [2020-10-28 14:53:53,061 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 14:53:53,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:53,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 14:53:53,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 14:53:53,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 14:53:53,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 14:53:53,854 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2020-10-28 14:53:53,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:53,854 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 14:53:53,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:53,854 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 14:53:53,854 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 14:53:53,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:53:53,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.