/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 01:52:14,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 01:52:14,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 01:52:14,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 01:52:14,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 01:52:14,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 01:52:14,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 01:52:14,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 01:52:14,702 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 01:52:14,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 01:52:14,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 01:52:14,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 01:52:14,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 01:52:14,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 01:52:14,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 01:52:14,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 01:52:14,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 01:52:14,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 01:52:14,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 01:52:14,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 01:52:14,755 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 01:52:14,782 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 01:52:14,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 01:52:14,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 01:52:14,787 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 01:52:14,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 01:52:14,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 01:52:14,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 01:52:14,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 01:52:14,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 01:52:14,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 01:52:14,790 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 01:52:14,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 01:52:14,790 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 01:52:14,791 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 01:52:14,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 01:52:14,791 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 01:52:14,791 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 01:52:14,791 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 01:52:14,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 01:52:14,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 01:52:14,792 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 01:52:14,792 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 01:52:14,793 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 01:52:14,793 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 01:52:15,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 01:52:15,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 01:52:15,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 01:52:15,270 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 01:52:15,271 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 01:52:15,272 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2021-02-22 01:52:15,366 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ac221557/23338044470e4197b21976dde6add7d8/FLAGef4e16288 [2021-02-22 01:52:15,992 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 01:52:15,994 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c [2021-02-22 01:52:16,007 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ac221557/23338044470e4197b21976dde6add7d8/FLAGef4e16288 [2021-02-22 01:52:16,323 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ac221557/23338044470e4197b21976dde6add7d8 [2021-02-22 01:52:16,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 01:52:16,341 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 01:52:16,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 01:52:16,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 01:52:16,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 01:52:16,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:52:16" (1/1) ... [2021-02-22 01:52:16,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fea992e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:52:16, skipping insertion in model container [2021-02-22 01:52:16,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:52:16" (1/1) ... [2021-02-22 01:52:16,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 01:52:16,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 01:52:16,566 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c[4246,4259] [2021-02-22 01:52:16,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:52:16,582 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 01:52:16,612 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c[4246,4259] [2021-02-22 01:52:16,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:52:16,630 INFO L208 MainTranslator]: Completed translation [2021-02-22 01:52:16,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:52:16 WrapperNode [2021-02-22 01:52:16,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 01:52:16,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 01:52:16,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 01:52:16,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 01:52:16,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:52:16" (1/1) ... [2021-02-22 01:52:16,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:52:16" (1/1) ... [2021-02-22 01:52:16,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:52:16" (1/1) ... [2021-02-22 01:52:16,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:52:16" (1/1) ... [2021-02-22 01:52:16,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:52:16" (1/1) ... [2021-02-22 01:52:16,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:52:16" (1/1) ... [2021-02-22 01:52:16,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:52:16" (1/1) ... [2021-02-22 01:52:16,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 01:52:16,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 01:52:16,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 01:52:16,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 01:52:16,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:52:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2021-02-22 01:52:16,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 01:52:16,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 01:52:16,868 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 01:52:16,868 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 01:52:16,868 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 01:52:16,869 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 01:52:16,869 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 01:52:16,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 01:52:16,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 01:52:16,870 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 01:52:16,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 01:52:16,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 01:52:16,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 01:52:16,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 01:52:16,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 01:52:16,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 01:52:17,460 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 01:52:17,460 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 01:52:17,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:52:17 BoogieIcfgContainer [2021-02-22 01:52:17,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 01:52:17,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 01:52:17,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 01:52:17,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 01:52:17,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 01:52:16" (1/3) ... [2021-02-22 01:52:17,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d49202e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:52:17, skipping insertion in model container [2021-02-22 01:52:17,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:52:16" (2/3) ... [2021-02-22 01:52:17,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d49202e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:52:17, skipping insertion in model container [2021-02-22 01:52:17,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:52:17" (3/3) ... [2021-02-22 01:52:17,472 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2021-02-22 01:52:17,479 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 01:52:17,484 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 01:52:17,503 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 01:52:17,527 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 01:52:17,527 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 01:52:17,528 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 01:52:17,528 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 01:52:17,528 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 01:52:17,528 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 01:52:17,528 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 01:52:17,528 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 01:52:17,547 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states. [2021-02-22 01:52:17,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-02-22 01:52:17,560 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:52:17,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:52:17,561 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:52:17,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:52:17,568 INFO L82 PathProgramCache]: Analyzing trace with hash -898561761, now seen corresponding path program 1 times [2021-02-22 01:52:17,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:52:17,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188809025] [2021-02-22 01:52:17,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:52:17,654 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:52:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:17,844 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:17,845 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:17,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:17,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:52:17,859 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:17,860 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:17,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:52:17,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:17,913 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:17,914 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:17,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:52:17,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188809025] [2021-02-22 01:52:17,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:52:17,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:52:17,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115292543] [2021-02-22 01:52:17,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:52:17,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:52:17,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:52:17,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:52:17,979 INFO L87 Difference]: Start difference. First operand 137 states. Second operand 4 states. [2021-02-22 01:52:18,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:52:18,686 INFO L93 Difference]: Finished difference Result 288 states and 393 transitions. [2021-02-22 01:52:18,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:52:18,688 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2021-02-22 01:52:18,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:52:18,703 INFO L225 Difference]: With dead ends: 288 [2021-02-22 01:52:18,703 INFO L226 Difference]: Without dead ends: 200 [2021-02-22 01:52:18,708 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 [2021-02-22 01:52:18,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-02-22 01:52:18,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2021-02-22 01:52:18,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2021-02-22 01:52:18,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 260 transitions. [2021-02-22 01:52:18,813 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 260 transitions. Word has length 87 [2021-02-22 01:52:18,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:52:18,815 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 260 transitions. [2021-02-22 01:52:18,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:52:18,815 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 260 transitions. [2021-02-22 01:52:18,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-02-22 01:52:18,827 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:52:18,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:52:18,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 01:52:18,831 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:52:18,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:52:18,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1510688528, now seen corresponding path program 1 times [2021-02-22 01:52:18,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:52:18,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002350618] [2021-02-22 01:52:18,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:52:18,844 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:52:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:18,980 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:18,981 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:18,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:18,983 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:52:18,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:18,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:19,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:52:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:19,027 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:19,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:52:19,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002350618] [2021-02-22 01:52:19,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:52:19,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:52:19,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677696603] [2021-02-22 01:52:19,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:52:19,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:52:19,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:52:19,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:52:19,043 INFO L87 Difference]: Start difference. First operand 198 states and 260 transitions. Second operand 4 states. [2021-02-22 01:52:19,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:52:19,464 INFO L93 Difference]: Finished difference Result 238 states and 318 transitions. [2021-02-22 01:52:19,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:52:19,465 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2021-02-22 01:52:19,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:52:19,469 INFO L225 Difference]: With dead ends: 238 [2021-02-22 01:52:19,470 INFO L226 Difference]: Without dead ends: 236 [2021-02-22 01:52:19,471 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 [2021-02-22 01:52:19,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-02-22 01:52:19,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 198. [2021-02-22 01:52:19,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2021-02-22 01:52:19,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 259 transitions. [2021-02-22 01:52:19,526 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 259 transitions. Word has length 88 [2021-02-22 01:52:19,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:52:19,527 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 259 transitions. [2021-02-22 01:52:19,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:52:19,527 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 259 transitions. [2021-02-22 01:52:19,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-02-22 01:52:19,531 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:52:19,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:52:19,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 01:52:19,532 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:52:19,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:52:19,533 INFO L82 PathProgramCache]: Analyzing trace with hash -2085367227, now seen corresponding path program 1 times [2021-02-22 01:52:19,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:52:19,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405576253] [2021-02-22 01:52:19,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:52:19,537 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:52:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:19,635 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:19,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:19,639 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:19,642 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:52:19,649 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:19,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:19,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:52:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:19,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:19,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:52:19,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405576253] [2021-02-22 01:52:19,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:52:19,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:52:19,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756658323] [2021-02-22 01:52:19,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:52:19,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:52:19,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:52:19,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:52:19,739 INFO L87 Difference]: Start difference. First operand 198 states and 259 transitions. Second operand 4 states. [2021-02-22 01:52:20,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:52:20,145 INFO L93 Difference]: Finished difference Result 474 states and 655 transitions. [2021-02-22 01:52:20,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:52:20,146 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2021-02-22 01:52:20,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:52:20,149 INFO L225 Difference]: With dead ends: 474 [2021-02-22 01:52:20,150 INFO L226 Difference]: Without dead ends: 333 [2021-02-22 01:52:20,151 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 [2021-02-22 01:52:20,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-02-22 01:52:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 331. [2021-02-22 01:52:20,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2021-02-22 01:52:20,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 448 transitions. [2021-02-22 01:52:20,220 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 448 transitions. Word has length 88 [2021-02-22 01:52:20,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:52:20,221 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 448 transitions. [2021-02-22 01:52:20,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:52:20,221 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 448 transitions. [2021-02-22 01:52:20,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-02-22 01:52:20,225 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:52:20,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:52:20,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 01:52:20,226 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:52:20,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:52:20,226 INFO L82 PathProgramCache]: Analyzing trace with hash 348430457, now seen corresponding path program 1 times [2021-02-22 01:52:20,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:52:20,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294456051] [2021-02-22 01:52:20,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:52:20,230 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:52:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:20,280 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:20,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:20,282 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:20,282 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:52:20,286 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:20,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:20,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:52:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:20,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:20,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:52:20,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294456051] [2021-02-22 01:52:20,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:52:20,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:52:20,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971828126] [2021-02-22 01:52:20,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:52:20,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:52:20,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:52:20,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:52:20,337 INFO L87 Difference]: Start difference. First operand 331 states and 448 transitions. Second operand 4 states. [2021-02-22 01:52:20,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:52:20,712 INFO L93 Difference]: Finished difference Result 403 states and 554 transitions. [2021-02-22 01:52:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:52:20,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2021-02-22 01:52:20,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:52:20,716 INFO L225 Difference]: With dead ends: 403 [2021-02-22 01:52:20,716 INFO L226 Difference]: Without dead ends: 401 [2021-02-22 01:52:20,717 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 [2021-02-22 01:52:20,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-02-22 01:52:20,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 331. [2021-02-22 01:52:20,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2021-02-22 01:52:20,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 446 transitions. [2021-02-22 01:52:20,777 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 446 transitions. Word has length 89 [2021-02-22 01:52:20,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:52:20,778 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 446 transitions. [2021-02-22 01:52:20,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:52:20,778 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 446 transitions. [2021-02-22 01:52:20,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-02-22 01:52:20,780 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:52:20,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:52:20,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-22 01:52:20,780 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:52:20,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:52:20,781 INFO L82 PathProgramCache]: Analyzing trace with hash -221630637, now seen corresponding path program 1 times [2021-02-22 01:52:20,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:52:20,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427315759] [2021-02-22 01:52:20,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:52:20,784 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:52:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:20,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:20,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:20,827 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:20,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:52:20,831 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:20,831 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:20,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:52:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:20,862 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:20,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:52:20,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427315759] [2021-02-22 01:52:20,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:52:20,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:52:20,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597660652] [2021-02-22 01:52:20,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:52:20,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:52:20,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:52:20,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:52:20,873 INFO L87 Difference]: Start difference. First operand 331 states and 446 transitions. Second operand 4 states. [2021-02-22 01:52:21,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:52:21,262 INFO L93 Difference]: Finished difference Result 867 states and 1208 transitions. [2021-02-22 01:52:21,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:52:21,263 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2021-02-22 01:52:21,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:52:21,267 INFO L225 Difference]: With dead ends: 867 [2021-02-22 01:52:21,267 INFO L226 Difference]: Without dead ends: 593 [2021-02-22 01:52:21,270 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 [2021-02-22 01:52:21,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-02-22 01:52:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 591. [2021-02-22 01:52:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2021-02-22 01:52:21,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 810 transitions. [2021-02-22 01:52:21,360 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 810 transitions. Word has length 89 [2021-02-22 01:52:21,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:52:21,360 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 810 transitions. [2021-02-22 01:52:21,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:52:21,361 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 810 transitions. [2021-02-22 01:52:21,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-02-22 01:52:21,362 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:52:21,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:52:21,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-22 01:52:21,363 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:52:21,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:52:21,364 INFO L82 PathProgramCache]: Analyzing trace with hash 2146544516, now seen corresponding path program 1 times [2021-02-22 01:52:21,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:52:21,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549309918] [2021-02-22 01:52:21,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:52:21,367 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:52:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:21,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:21,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:21,403 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:21,403 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:52:21,406 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:21,407 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:21,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:52:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:21,436 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:21,436 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:52:21,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549309918] [2021-02-22 01:52:21,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:52:21,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:52:21,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382961826] [2021-02-22 01:52:21,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:52:21,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:52:21,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:52:21,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:52:21,446 INFO L87 Difference]: Start difference. First operand 591 states and 810 transitions. Second operand 4 states. [2021-02-22 01:52:21,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:52:21,867 INFO L93 Difference]: Finished difference Result 723 states and 1004 transitions. [2021-02-22 01:52:21,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:52:21,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2021-02-22 01:52:21,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:52:21,872 INFO L225 Difference]: With dead ends: 723 [2021-02-22 01:52:21,872 INFO L226 Difference]: Without dead ends: 721 [2021-02-22 01:52:21,873 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 [2021-02-22 01:52:21,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-02-22 01:52:21,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 591. [2021-02-22 01:52:21,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2021-02-22 01:52:21,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 806 transitions. [2021-02-22 01:52:21,964 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 806 transitions. Word has length 90 [2021-02-22 01:52:21,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:52:21,964 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 806 transitions. [2021-02-22 01:52:21,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:52:21,965 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 806 transitions. [2021-02-22 01:52:21,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-02-22 01:52:21,966 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:52:21,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:52:21,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-22 01:52:21,967 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:52:21,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:52:21,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1719629177, now seen corresponding path program 1 times [2021-02-22 01:52:21,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:52:21,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372558245] [2021-02-22 01:52:21,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:52:21,970 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:52:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:22,057 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:22,058 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:22,060 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:22,061 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:52:22,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:22,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:22,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:52:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:22,096 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:22,096 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:52:22,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372558245] [2021-02-22 01:52:22,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:52:22,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:52:22,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142875031] [2021-02-22 01:52:22,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:52:22,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:52:22,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:52:22,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:52:22,106 INFO L87 Difference]: Start difference. First operand 591 states and 806 transitions. Second operand 4 states. [2021-02-22 01:52:22,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:52:22,572 INFO L93 Difference]: Finished difference Result 1635 states and 2272 transitions. [2021-02-22 01:52:22,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:52:22,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2021-02-22 01:52:22,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:52:22,578 INFO L225 Difference]: With dead ends: 1635 [2021-02-22 01:52:22,579 INFO L226 Difference]: Without dead ends: 1101 [2021-02-22 01:52:22,582 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 [2021-02-22 01:52:22,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-02-22 01:52:22,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1099. [2021-02-22 01:52:22,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1099 states. [2021-02-22 01:52:22,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1506 transitions. [2021-02-22 01:52:22,735 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1506 transitions. Word has length 90 [2021-02-22 01:52:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:52:22,736 INFO L480 AbstractCegarLoop]: Abstraction has 1099 states and 1506 transitions. [2021-02-22 01:52:22,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:52:22,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1506 transitions. [2021-02-22 01:52:22,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-02-22 01:52:22,738 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:52:22,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:52:22,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-22 01:52:22,739 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:52:22,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:52:22,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1769141639, now seen corresponding path program 1 times [2021-02-22 01:52:22,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:52:22,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885595058] [2021-02-22 01:52:22,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:52:22,742 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:52:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:22,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:22,769 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:22,770 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:22,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:52:22,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:22,774 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:22,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:52:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:22,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:22,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:52:22,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885595058] [2021-02-22 01:52:22,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:52:22,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:52:22,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379495203] [2021-02-22 01:52:22,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:52:22,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:52:22,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:52:22,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:52:22,812 INFO L87 Difference]: Start difference. First operand 1099 states and 1506 transitions. Second operand 4 states. [2021-02-22 01:52:23,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:52:23,489 INFO L93 Difference]: Finished difference Result 3135 states and 4340 transitions. [2021-02-22 01:52:23,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:52:23,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2021-02-22 01:52:23,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:52:23,501 INFO L225 Difference]: With dead ends: 3135 [2021-02-22 01:52:23,501 INFO L226 Difference]: Without dead ends: 2093 [2021-02-22 01:52:23,505 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 [2021-02-22 01:52:23,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2021-02-22 01:52:23,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2091. [2021-02-22 01:52:23,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2091 states. [2021-02-22 01:52:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 2858 transitions. [2021-02-22 01:52:23,805 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 2858 transitions. Word has length 91 [2021-02-22 01:52:23,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:52:23,806 INFO L480 AbstractCegarLoop]: Abstraction has 2091 states and 2858 transitions. [2021-02-22 01:52:23,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:52:23,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 2858 transitions. [2021-02-22 01:52:23,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-02-22 01:52:23,809 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:52:23,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:52:23,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-22 01:52:23,809 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:52:23,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:52:23,810 INFO L82 PathProgramCache]: Analyzing trace with hash 2053505869, now seen corresponding path program 1 times [2021-02-22 01:52:23,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:52:23,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061947851] [2021-02-22 01:52:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:52:23,813 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:52:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:23,837 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:23,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:23,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:23,839 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:52:23,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:23,842 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:23,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:52:23,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:23,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:23,869 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:52:23,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061947851] [2021-02-22 01:52:23,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:52:23,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:52:23,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118215542] [2021-02-22 01:52:23,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:52:23,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:52:23,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:52:23,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:52:23,879 INFO L87 Difference]: Start difference. First operand 2091 states and 2858 transitions. Second operand 4 states. [2021-02-22 01:52:24,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:52:24,482 INFO L93 Difference]: Finished difference Result 2559 states and 3532 transitions. [2021-02-22 01:52:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:52:24,483 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2021-02-22 01:52:24,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:52:24,497 INFO L225 Difference]: With dead ends: 2559 [2021-02-22 01:52:24,497 INFO L226 Difference]: Without dead ends: 2557 [2021-02-22 01:52:24,498 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 [2021-02-22 01:52:24,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-02-22 01:52:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2091. [2021-02-22 01:52:24,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2091 states. [2021-02-22 01:52:24,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 2842 transitions. [2021-02-22 01:52:24,817 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 2842 transitions. Word has length 91 [2021-02-22 01:52:24,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:52:24,818 INFO L480 AbstractCegarLoop]: Abstraction has 2091 states and 2842 transitions. [2021-02-22 01:52:24,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:52:24,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 2842 transitions. [2021-02-22 01:52:24,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-02-22 01:52:24,821 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:52:24,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:52:24,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-22 01:52:24,821 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:52:24,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:52:24,822 INFO L82 PathProgramCache]: Analyzing trace with hash -830691816, now seen corresponding path program 1 times [2021-02-22 01:52:24,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:52:24,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117478970] [2021-02-22 01:52:24,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:52:24,825 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:52:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:24,848 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:24,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:24,850 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:24,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:52:24,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:24,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:24,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:52:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:24,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:24,882 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:52:24,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117478970] [2021-02-22 01:52:24,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:52:24,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:52:24,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851697578] [2021-02-22 01:52:24,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:52:24,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:52:24,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:52:24,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:52:24,893 INFO L87 Difference]: Start difference. First operand 2091 states and 2842 transitions. Second operand 4 states. [2021-02-22 01:52:25,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:52:25,712 INFO L93 Difference]: Finished difference Result 2543 states and 3484 transitions. [2021-02-22 01:52:25,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:52:25,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2021-02-22 01:52:25,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:52:25,728 INFO L225 Difference]: With dead ends: 2543 [2021-02-22 01:52:25,728 INFO L226 Difference]: Without dead ends: 2541 [2021-02-22 01:52:25,730 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 [2021-02-22 01:52:25,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-02-22 01:52:26,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2091. [2021-02-22 01:52:26,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2091 states. [2021-02-22 01:52:26,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 2826 transitions. [2021-02-22 01:52:26,086 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 2826 transitions. Word has length 92 [2021-02-22 01:52:26,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:52:26,087 INFO L480 AbstractCegarLoop]: Abstraction has 2091 states and 2826 transitions. [2021-02-22 01:52:26,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:52:26,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 2826 transitions. [2021-02-22 01:52:26,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-02-22 01:52:26,089 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:52:26,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:52:26,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-22 01:52:26,090 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:52:26,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:52:26,091 INFO L82 PathProgramCache]: Analyzing trace with hash -990938963, now seen corresponding path program 1 times [2021-02-22 01:52:26,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:52:26,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514216028] [2021-02-22 01:52:26,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:52:26,093 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:52:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:26,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:26,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:26,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:26,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:52:26,118 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:26,119 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:26,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:52:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:26,145 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:26,146 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:52:26,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514216028] [2021-02-22 01:52:26,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:52:26,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:52:26,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040867310] [2021-02-22 01:52:26,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:52:26,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:52:26,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:52:26,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:52:26,155 INFO L87 Difference]: Start difference. First operand 2091 states and 2826 transitions. Second operand 4 states. [2021-02-22 01:52:27,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:52:27,043 INFO L93 Difference]: Finished difference Result 6063 states and 8236 transitions. [2021-02-22 01:52:27,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:52:27,043 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2021-02-22 01:52:27,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:52:27,065 INFO L225 Difference]: With dead ends: 6063 [2021-02-22 01:52:27,065 INFO L226 Difference]: Without dead ends: 4029 [2021-02-22 01:52:27,078 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 [2021-02-22 01:52:27,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4029 states. [2021-02-22 01:52:27,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4029 to 4027. [2021-02-22 01:52:27,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4027 states. [2021-02-22 01:52:27,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4027 states to 4027 states and 5402 transitions. [2021-02-22 01:52:27,802 INFO L78 Accepts]: Start accepts. Automaton has 4027 states and 5402 transitions. Word has length 92 [2021-02-22 01:52:27,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:52:27,803 INFO L480 AbstractCegarLoop]: Abstraction has 4027 states and 5402 transitions. [2021-02-22 01:52:27,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:52:27,803 INFO L276 IsEmpty]: Start isEmpty. Operand 4027 states and 5402 transitions. [2021-02-22 01:52:27,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-02-22 01:52:27,807 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:52:27,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:52:27,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-22 01:52:27,808 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:52:27,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:52:27,809 INFO L82 PathProgramCache]: Analyzing trace with hash -46506463, now seen corresponding path program 1 times [2021-02-22 01:52:27,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:52:27,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261429558] [2021-02-22 01:52:27,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:52:27,811 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:52:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:27,833 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:27,833 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:27,834 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:27,834 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:52:27,837 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:27,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:27,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:52:27,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:27,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:27,868 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:52:27,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261429558] [2021-02-22 01:52:27,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:52:27,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:52:27,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554764665] [2021-02-22 01:52:27,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:52:27,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:52:27,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:52:27,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:52:27,877 INFO L87 Difference]: Start difference. First operand 4027 states and 5402 transitions. Second operand 4 states. [2021-02-22 01:52:28,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:52:28,945 INFO L93 Difference]: Finished difference Result 4863 states and 6556 transitions. [2021-02-22 01:52:28,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:52:28,946 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2021-02-22 01:52:28,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:52:28,969 INFO L225 Difference]: With dead ends: 4863 [2021-02-22 01:52:28,970 INFO L226 Difference]: Without dead ends: 4861 [2021-02-22 01:52:28,972 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 [2021-02-22 01:52:28,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2021-02-22 01:52:29,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 4027. [2021-02-22 01:52:29,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4027 states. [2021-02-22 01:52:29,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4027 states to 4027 states and 5370 transitions. [2021-02-22 01:52:29,649 INFO L78 Accepts]: Start accepts. Automaton has 4027 states and 5370 transitions. Word has length 93 [2021-02-22 01:52:29,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:52:29,650 INFO L480 AbstractCegarLoop]: Abstraction has 4027 states and 5370 transitions. [2021-02-22 01:52:29,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:52:29,650 INFO L276 IsEmpty]: Start isEmpty. Operand 4027 states and 5370 transitions. [2021-02-22 01:52:29,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-02-22 01:52:29,655 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:52:29,655 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:52:29,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-22 01:52:29,655 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:52:29,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:52:29,656 INFO L82 PathProgramCache]: Analyzing trace with hash -654091333, now seen corresponding path program 1 times [2021-02-22 01:52:29,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:52:29,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75513760] [2021-02-22 01:52:29,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:52:29,658 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:52:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:29,678 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:29,679 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:29,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:29,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:52:29,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:29,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:29,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:52:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:29,711 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:29,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:52:29,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75513760] [2021-02-22 01:52:29,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:52:29,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:52:29,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021424087] [2021-02-22 01:52:29,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:52:29,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:52:29,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:52:29,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:52:29,723 INFO L87 Difference]: Start difference. First operand 4027 states and 5370 transitions. Second operand 4 states. [2021-02-22 01:52:31,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:52:31,175 INFO L93 Difference]: Finished difference Result 11775 states and 15740 transitions. [2021-02-22 01:52:31,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:52:31,175 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2021-02-22 01:52:31,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:52:31,211 INFO L225 Difference]: With dead ends: 11775 [2021-02-22 01:52:31,211 INFO L226 Difference]: Without dead ends: 7805 [2021-02-22 01:52:31,223 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 [2021-02-22 01:52:31,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7805 states. [2021-02-22 01:52:32,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7805 to 7803. [2021-02-22 01:52:32,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2021-02-22 01:52:32,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 10298 transitions. [2021-02-22 01:52:32,113 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 10298 transitions. Word has length 93 [2021-02-22 01:52:32,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:52:32,113 INFO L480 AbstractCegarLoop]: Abstraction has 7803 states and 10298 transitions. [2021-02-22 01:52:32,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:52:32,114 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 10298 transitions. [2021-02-22 01:52:32,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-02-22 01:52:32,121 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:52:32,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:52:32,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-22 01:52:32,122 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:52:32,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:52:32,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1506563924, now seen corresponding path program 1 times [2021-02-22 01:52:32,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:52:32,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631857216] [2021-02-22 01:52:32,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:52:32,125 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:52:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:32,145 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:32,146 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:32,147 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:32,147 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:52:32,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:32,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:32,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:52:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:32,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:32,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:32,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:52:32,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631857216] [2021-02-22 01:52:32,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:52:32,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:52:32,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472893249] [2021-02-22 01:52:32,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:52:32,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:52:32,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:52:32,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:52:32,187 INFO L87 Difference]: Start difference. First operand 7803 states and 10298 transitions. Second operand 4 states. [2021-02-22 01:52:33,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:52:33,530 INFO L93 Difference]: Finished difference Result 9343 states and 12348 transitions. [2021-02-22 01:52:33,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:52:33,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2021-02-22 01:52:33,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:52:33,557 INFO L225 Difference]: With dead ends: 9343 [2021-02-22 01:52:33,557 INFO L226 Difference]: Without dead ends: 9341 [2021-02-22 01:52:33,562 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 [2021-02-22 01:52:33,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2021-02-22 01:52:34,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 7803. [2021-02-22 01:52:34,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2021-02-22 01:52:34,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 10234 transitions. [2021-02-22 01:52:34,724 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 10234 transitions. Word has length 94 [2021-02-22 01:52:34,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:52:34,724 INFO L480 AbstractCegarLoop]: Abstraction has 7803 states and 10234 transitions. [2021-02-22 01:52:34,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:52:34,724 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 10234 transitions. [2021-02-22 01:52:34,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-02-22 01:52:34,732 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:52:34,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:52:34,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-22 01:52:34,733 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:52:34,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:52:34,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1198250977, now seen corresponding path program 1 times [2021-02-22 01:52:34,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:52:34,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471478693] [2021-02-22 01:52:34,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:52:34,736 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:52:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:34,757 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:34,757 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:34,758 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:34,758 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:52:34,762 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:34,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:34,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:52:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:34,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:34,793 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:52:34,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471478693] [2021-02-22 01:52:34,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:52:34,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:52:34,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396437037] [2021-02-22 01:52:34,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:52:34,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:52:34,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:52:34,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:52:34,808 INFO L87 Difference]: Start difference. First operand 7803 states and 10234 transitions. Second operand 4 states. [2021-02-22 01:52:36,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:52:36,756 INFO L93 Difference]: Finished difference Result 22911 states and 30076 transitions. [2021-02-22 01:52:36,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:52:36,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2021-02-22 01:52:36,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:52:36,798 INFO L225 Difference]: With dead ends: 22911 [2021-02-22 01:52:36,798 INFO L226 Difference]: Without dead ends: 15165 [2021-02-22 01:52:36,821 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 [2021-02-22 01:52:36,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15165 states. [2021-02-22 01:52:38,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15165 to 15163. [2021-02-22 01:52:38,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15163 states. [2021-02-22 01:52:38,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15163 states to 15163 states and 19642 transitions. [2021-02-22 01:52:38,548 INFO L78 Accepts]: Start accepts. Automaton has 15163 states and 19642 transitions. Word has length 94 [2021-02-22 01:52:38,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:52:38,548 INFO L480 AbstractCegarLoop]: Abstraction has 15163 states and 19642 transitions. [2021-02-22 01:52:38,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:52:38,549 INFO L276 IsEmpty]: Start isEmpty. Operand 15163 states and 19642 transitions. [2021-02-22 01:52:38,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-02-22 01:52:38,561 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:52:38,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:52:38,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-22 01:52:38,561 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:52:38,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:52:38,562 INFO L82 PathProgramCache]: Analyzing trace with hash 476295413, now seen corresponding path program 1 times [2021-02-22 01:52:38,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:52:38,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066620445] [2021-02-22 01:52:38,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:52:38,565 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:52:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:38,586 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:38,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:38,588 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:38,588 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:52:38,591 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:38,592 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:38,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:52:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:38,623 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:38,624 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:52:38,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066620445] [2021-02-22 01:52:38,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:52:38,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:52:38,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281858894] [2021-02-22 01:52:38,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:52:38,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:52:38,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:52:38,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:52:38,634 INFO L87 Difference]: Start difference. First operand 15163 states and 19642 transitions. Second operand 4 states. [2021-02-22 01:52:41,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:52:41,382 INFO L93 Difference]: Finished difference Result 17983 states and 23228 transitions. [2021-02-22 01:52:41,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:52:41,382 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2021-02-22 01:52:41,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:52:41,436 INFO L225 Difference]: With dead ends: 17983 [2021-02-22 01:52:41,436 INFO L226 Difference]: Without dead ends: 17981 [2021-02-22 01:52:41,447 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 [2021-02-22 01:52:41,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17981 states. [2021-02-22 01:52:43,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17981 to 15163. [2021-02-22 01:52:43,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15163 states. [2021-02-22 01:52:43,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15163 states to 15163 states and 19514 transitions. [2021-02-22 01:52:43,555 INFO L78 Accepts]: Start accepts. Automaton has 15163 states and 19514 transitions. Word has length 95 [2021-02-22 01:52:43,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:52:43,555 INFO L480 AbstractCegarLoop]: Abstraction has 15163 states and 19514 transitions. [2021-02-22 01:52:43,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:52:43,555 INFO L276 IsEmpty]: Start isEmpty. Operand 15163 states and 19514 transitions. [2021-02-22 01:52:43,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-02-22 01:52:43,567 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:52:43,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:52:43,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-22 01:52:43,567 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:52:43,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:52:43,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1508679185, now seen corresponding path program 1 times [2021-02-22 01:52:43,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:52:43,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892554826] [2021-02-22 01:52:43,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:52:43,570 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:52:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:43,588 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:43,589 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:43,590 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:43,590 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:52:43,593 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:43,593 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:43,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:52:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:43,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:43,624 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:43,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:52:43,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892554826] [2021-02-22 01:52:43,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:52:43,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:52:43,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546187654] [2021-02-22 01:52:43,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:52:43,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:52:43,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:52:43,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:52:43,634 INFO L87 Difference]: Start difference. First operand 15163 states and 19514 transitions. Second operand 4 states. [2021-02-22 01:52:47,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:52:47,598 INFO L93 Difference]: Finished difference Result 44607 states and 57404 transitions. [2021-02-22 01:52:47,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:52:47,601 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2021-02-22 01:52:47,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:52:47,663 INFO L225 Difference]: With dead ends: 44607 [2021-02-22 01:52:47,663 INFO L226 Difference]: Without dead ends: 29501 [2021-02-22 01:52:47,702 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 [2021-02-22 01:52:47,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29501 states. [2021-02-22 01:52:51,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29501 to 29499. [2021-02-22 01:52:51,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29499 states. [2021-02-22 01:52:51,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29499 states to 29499 states and 37434 transitions. [2021-02-22 01:52:51,338 INFO L78 Accepts]: Start accepts. Automaton has 29499 states and 37434 transitions. Word has length 95 [2021-02-22 01:52:51,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:52:51,338 INFO L480 AbstractCegarLoop]: Abstraction has 29499 states and 37434 transitions. [2021-02-22 01:52:51,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:52:51,338 INFO L276 IsEmpty]: Start isEmpty. Operand 29499 states and 37434 transitions. [2021-02-22 01:52:51,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-02-22 01:52:51,357 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:52:51,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:52:51,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-22 01:52:51,359 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:52:51,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:52:51,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1815393088, now seen corresponding path program 1 times [2021-02-22 01:52:51,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:52:51,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538779735] [2021-02-22 01:52:51,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:52:51,363 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:52:51,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:51,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:51,386 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:51,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:51,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:52:51,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:51,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:51,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:52:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:51,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:51,415 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:52:51,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538779735] [2021-02-22 01:52:51,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:52:51,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:52:51,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138247487] [2021-02-22 01:52:51,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:52:51,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:52:51,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:52:51,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:52:51,426 INFO L87 Difference]: Start difference. First operand 29499 states and 37434 transitions. Second operand 4 states. [2021-02-22 01:52:55,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:52:55,853 INFO L93 Difference]: Finished difference Result 34623 states and 43580 transitions. [2021-02-22 01:52:55,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:52:55,854 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2021-02-22 01:52:55,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:52:55,914 INFO L225 Difference]: With dead ends: 34623 [2021-02-22 01:52:55,915 INFO L226 Difference]: Without dead ends: 34621 [2021-02-22 01:52:55,926 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 [2021-02-22 01:52:55,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34621 states. [2021-02-22 01:52:59,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34621 to 29499. [2021-02-22 01:52:59,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29499 states. [2021-02-22 01:52:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29499 states to 29499 states and 37178 transitions. [2021-02-22 01:52:59,688 INFO L78 Accepts]: Start accepts. Automaton has 29499 states and 37178 transitions. Word has length 96 [2021-02-22 01:52:59,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:52:59,688 INFO L480 AbstractCegarLoop]: Abstraction has 29499 states and 37178 transitions. [2021-02-22 01:52:59,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:52:59,688 INFO L276 IsEmpty]: Start isEmpty. Operand 29499 states and 37178 transitions. [2021-02-22 01:52:59,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-02-22 01:52:59,704 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:52:59,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:52:59,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-22 01:52:59,704 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:52:59,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:52:59,705 INFO L82 PathProgramCache]: Analyzing trace with hash 475832085, now seen corresponding path program 1 times [2021-02-22 01:52:59,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:52:59,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31756137] [2021-02-22 01:52:59,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:52:59,707 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:52:59,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:59,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:59,727 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:59,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:59,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:52:59,731 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:59,732 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:59,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:52:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:52:59,757 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:52:59,758 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:52:59,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:52:59,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31756137] [2021-02-22 01:52:59,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:52:59,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:52:59,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910147951] [2021-02-22 01:52:59,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:52:59,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:52:59,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:52:59,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:52:59,768 INFO L87 Difference]: Start difference. First operand 29499 states and 37178 transitions. Second operand 4 states. [2021-02-22 01:53:08,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:53:08,056 INFO L93 Difference]: Finished difference Result 86847 states and 109372 transitions. [2021-02-22 01:53:08,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:53:08,057 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2021-02-22 01:53:08,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:53:08,178 INFO L225 Difference]: With dead ends: 86847 [2021-02-22 01:53:08,178 INFO L226 Difference]: Without dead ends: 57405 [2021-02-22 01:53:08,269 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 [2021-02-22 01:53:08,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57405 states. [2021-02-22 01:53:15,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57405 to 57403. [2021-02-22 01:53:15,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57403 states. [2021-02-22 01:53:15,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57403 states to 57403 states and 71226 transitions. [2021-02-22 01:53:15,768 INFO L78 Accepts]: Start accepts. Automaton has 57403 states and 71226 transitions. Word has length 96 [2021-02-22 01:53:15,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:53:15,769 INFO L480 AbstractCegarLoop]: Abstraction has 57403 states and 71226 transitions. [2021-02-22 01:53:15,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:53:15,769 INFO L276 IsEmpty]: Start isEmpty. Operand 57403 states and 71226 transitions. [2021-02-22 01:53:15,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-02-22 01:53:15,790 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:53:15,791 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:53:15,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-02-22 01:53:15,791 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:53:15,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:53:15,793 INFO L82 PathProgramCache]: Analyzing trace with hash 377748425, now seen corresponding path program 1 times [2021-02-22 01:53:15,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:53:15,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304717858] [2021-02-22 01:53:15,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:53:15,800 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:53:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:53:15,844 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:53:15,844 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:53:15,845 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:53:15,845 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:53:15,848 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:53:15,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:53:15,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:53:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:53:15,872 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:53:15,873 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:53:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:53:15,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304717858] [2021-02-22 01:53:15,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:53:15,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:53:15,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002958245] [2021-02-22 01:53:15,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:53:15,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:53:15,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:53:15,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:53:15,882 INFO L87 Difference]: Start difference. First operand 57403 states and 71226 transitions. Second operand 4 states. [2021-02-22 01:53:24,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:53:24,216 INFO L93 Difference]: Finished difference Result 66623 states and 81468 transitions. [2021-02-22 01:53:24,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:53:24,217 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2021-02-22 01:53:24,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:53:24,301 INFO L225 Difference]: With dead ends: 66623 [2021-02-22 01:53:24,302 INFO L226 Difference]: Without dead ends: 66621 [2021-02-22 01:53:24,317 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 [2021-02-22 01:53:24,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66621 states. [2021-02-22 01:53:31,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66621 to 57403. [2021-02-22 01:53:31,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57403 states. [2021-02-22 01:53:31,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57403 states to 57403 states and 70714 transitions. [2021-02-22 01:53:31,542 INFO L78 Accepts]: Start accepts. Automaton has 57403 states and 70714 transitions. Word has length 97 [2021-02-22 01:53:31,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:53:31,542 INFO L480 AbstractCegarLoop]: Abstraction has 57403 states and 70714 transitions. [2021-02-22 01:53:31,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:53:31,542 INFO L276 IsEmpty]: Start isEmpty. Operand 57403 states and 70714 transitions. [2021-02-22 01:53:31,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-02-22 01:53:31,564 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:53:31,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:53:31,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-02-22 01:53:31,564 INFO L428 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:53:31,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:53:31,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1866139683, now seen corresponding path program 1 times [2021-02-22 01:53:31,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:53:31,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471245945] [2021-02-22 01:53:31,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:53:31,567 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:53:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:53:31,590 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:53:31,591 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:53:31,591 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:53:31,592 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:53:31,597 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:53:31,598 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:53:31,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:53:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:53:31,623 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:53:31,624 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:53:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:53:31,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471245945] [2021-02-22 01:53:31,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:53:31,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:53:31,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70112707] [2021-02-22 01:53:31,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:53:31,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:53:31,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:53:31,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:53:31,633 INFO L87 Difference]: Start difference. First operand 57403 states and 70714 transitions. Second operand 4 states. [2021-02-22 01:53:45,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:53:45,762 INFO L93 Difference]: Finished difference Result 169021 states and 207931 transitions. [2021-02-22 01:53:45,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:53:45,763 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2021-02-22 01:53:45,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:53:45,852 INFO L225 Difference]: With dead ends: 169021 [2021-02-22 01:53:45,852 INFO L226 Difference]: Without dead ends: 57403 [2021-02-22 01:53:46,165 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 [2021-02-22 01:53:46,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57403 states. [2021-02-22 01:53:53,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57403 to 57403. [2021-02-22 01:53:53,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57403 states. [2021-02-22 01:53:53,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57403 states to 57403 states and 68666 transitions. [2021-02-22 01:53:53,204 INFO L78 Accepts]: Start accepts. Automaton has 57403 states and 68666 transitions. Word has length 97 [2021-02-22 01:53:53,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:53:53,204 INFO L480 AbstractCegarLoop]: Abstraction has 57403 states and 68666 transitions. [2021-02-22 01:53:53,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:53:53,204 INFO L276 IsEmpty]: Start isEmpty. Operand 57403 states and 68666 transitions. [2021-02-22 01:53:53,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-02-22 01:53:53,221 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:53:53,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:53:53,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-02-22 01:53:53,221 INFO L428 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:53:53,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:53:53,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1239562796, now seen corresponding path program 1 times [2021-02-22 01:53:53,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:53:53,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444505452] [2021-02-22 01:53:53,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:53:53,223 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:53:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:53:53,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:53:53,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:53:53,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:53:53,247 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:53:53,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:53:53,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:53:53,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:53:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:53:53,275 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:53:53,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:53:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:53:53,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444505452] [2021-02-22 01:53:53,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:53:53,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:53:53,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457153280] [2021-02-22 01:53:53,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:53:53,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:53:53,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:53:53,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:53:53,285 INFO L87 Difference]: Start difference. First operand 57403 states and 68666 transitions. Second operand 4 states. [2021-02-22 01:54:00,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:54:00,362 INFO L93 Difference]: Finished difference Result 57403 states and 68666 transitions. [2021-02-22 01:54:00,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:54:00,365 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2021-02-22 01:54:00,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:54:00,365 INFO L225 Difference]: With dead ends: 57403 [2021-02-22 01:54:00,365 INFO L226 Difference]: Without dead ends: 0 [2021-02-22 01:54:00,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-22 01:54:00,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-22 01:54:00,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-22 01:54:00,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-22 01:54:00,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-22 01:54:00,429 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 98 [2021-02-22 01:54:00,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:54:00,430 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-22 01:54:00,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:54:00,430 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-22 01:54:00,430 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-22 01:54:00,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-02-22 01:54:00,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-22 01:54:19,152 WARN L202 SmtUtils]: Spent 18.58 s on a formula simplification. DAG size of input: 4192 DAG size of output: 34 [2021-02-22 01:54:23,336 WARN L202 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 2102 DAG size of output: 31 [2021-02-22 01:55:22,224 WARN L202 SmtUtils]: Spent 58.87 s on a formula simplification that was a NOOP. DAG size: 2125 [2021-02-22 01:55:38,626 WARN L202 SmtUtils]: Spent 16.39 s on a formula simplification. DAG size of input: 2134 DAG size of output: 581 [2021-02-22 01:55:41,021 WARN L202 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 1091 DAG size of output: 189 [2021-02-22 01:55:43,682 WARN L202 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 1120 DAG size of output: 191 [2021-02-22 01:55:45,461 WARN L202 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 1216 DAG size of output: 87 [2021-02-22 01:55:49,604 WARN L202 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 2107 DAG size of output: 45 [2021-02-22 01:56:36,092 WARN L202 SmtUtils]: Spent 46.47 s on a formula simplification. DAG size of input: 5189 DAG size of output: 31 [2021-02-22 01:56:43,497 WARN L202 SmtUtils]: Spent 7.40 s on a formula simplification. DAG size of input: 1095 DAG size of output: 581 [2021-02-22 01:56:51,907 WARN L202 SmtUtils]: Spent 8.40 s on a formula simplification. DAG size of input: 2914 DAG size of output: 53 [2021-02-22 01:57:06,458 WARN L202 SmtUtils]: Spent 14.55 s on a formula simplification that was a NOOP. DAG size: 1099 [2021-02-22 01:57:20,588 WARN L202 SmtUtils]: Spent 14.12 s on a formula simplification. DAG size of input: 2656 DAG size of output: 41 [2021-02-22 01:57:24,993 WARN L202 SmtUtils]: Spent 4.39 s on a formula simplification. DAG size of input: 2111 DAG size of output: 65 [2021-02-22 01:57:55,226 WARN L202 SmtUtils]: Spent 30.22 s on a formula simplification. DAG size of input: 4797 DAG size of output: 31 [2021-02-22 01:57:56,263 WARN L202 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 1076 DAG size of output: 31 [2021-02-22 01:58:06,781 WARN L202 SmtUtils]: Spent 10.51 s on a formula simplification. DAG size of input: 2146 DAG size of output: 321 [2021-02-22 01:58:08,932 WARN L202 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 1144 DAG size of output: 123 [2021-02-22 01:58:10,803 WARN L202 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 1312 DAG size of output: 67 [2021-02-22 01:59:07,245 WARN L202 SmtUtils]: Spent 56.42 s on a formula simplification. DAG size of input: 5216 DAG size of output: 31 [2021-02-22 01:59:13,055 WARN L202 SmtUtils]: Spent 5.80 s on a formula simplification. DAG size of input: 2115 DAG size of output: 121 [2021-02-22 01:59:14,105 WARN L202 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 1081 DAG size of output: 45 [2021-02-22 01:59:32,279 WARN L202 SmtUtils]: Spent 18.16 s on a formula simplification. DAG size of input: 3682 DAG size of output: 45 [2021-02-22 01:59:40,041 WARN L202 SmtUtils]: Spent 7.76 s on a formula simplification. DAG size of input: 1102 DAG size of output: 583 [2021-02-22 01:59:55,724 WARN L202 SmtUtils]: Spent 15.67 s on a formula simplification. DAG size of input: 4192 DAG size of output: 34 [2021-02-22 02:00:54,469 WARN L202 SmtUtils]: Spent 58.72 s on a formula simplification. DAG size of input: 5216 DAG size of output: 31 [2021-02-22 02:01:39,685 WARN L202 SmtUtils]: Spent 45.19 s on a formula simplification. DAG size of input: 5139 DAG size of output: 31 [2021-02-22 02:01:50,407 WARN L202 SmtUtils]: Spent 10.71 s on a formula simplification. DAG size of input: 2119 DAG size of output: 321 [2021-02-22 02:01:51,612 WARN L202 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 1085 DAG size of output: 65 [2021-02-22 02:01:58,932 WARN L202 SmtUtils]: Spent 7.31 s on a formula simplification. DAG size of input: 2194 DAG size of output: 189 [2021-02-22 02:02:00,865 WARN L202 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 1216 DAG size of output: 87 [2021-02-22 02:02:03,448 WARN L202 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 1504 DAG size of output: 55 [2021-02-22 02:02:29,157 WARN L202 SmtUtils]: Spent 25.69 s on a formula simplification. DAG size of input: 4411 DAG size of output: 31 [2021-02-22 02:02:59,682 WARN L202 SmtUtils]: Spent 30.51 s on a formula simplification. DAG size of input: 2123 DAG size of output: 1097 [2021-02-22 02:03:01,406 WARN L202 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 1089 DAG size of output: 121 [2021-02-22 02:03:16,064 WARN L202 SmtUtils]: Spent 14.65 s on a formula simplification that was a NOOP. DAG size: 1099 [2021-02-22 02:04:13,141 WARN L202 SmtUtils]: Spent 57.06 s on a formula simplification. DAG size of input: 5218 DAG size of output: 39 [2021-02-22 02:04:17,618 WARN L202 SmtUtils]: Spent 4.47 s on a formula simplification. DAG size of input: 1108 DAG size of output: 323 [2021-02-22 02:04:21,705 WARN L202 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 2105 DAG size of output: 39 [2021-02-22 02:05:14,161 WARN L202 SmtUtils]: Spent 52.43 s on a formula simplification. DAG size of input: 5211 DAG size of output: 31 [2021-02-22 02:05:18,261 WARN L202 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 2102 DAG size of output: 31 [2021-02-22 02:05:22,621 WARN L202 SmtUtils]: Spent 4.35 s on a formula simplification. DAG size of input: 1093 DAG size of output: 321 [2021-02-22 02:05:28,731 WARN L202 SmtUtils]: Spent 6.10 s on a formula simplification. DAG size of input: 2242 DAG size of output: 121 [2021-02-22 02:05:30,661 WARN L202 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 1312 DAG size of output: 67 [2021-02-22 02:05:35,891 WARN L202 SmtUtils]: Spent 5.22 s on a formula simplification. DAG size of input: 1888 DAG size of output: 47 [2021-02-22 02:05:40,236 WARN L202 SmtUtils]: Spent 4.33 s on a formula simplification. DAG size of input: 2109 DAG size of output: 53 [2021-02-22 02:06:20,883 WARN L202 SmtUtils]: Spent 40.63 s on a formula simplification. DAG size of input: 5089 DAG size of output: 31