/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 11:23:50,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 11:23:50,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 11:23:50,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 11:23:50,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 11:23:50,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 11:23:50,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 11:23:50,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 11:23:50,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 11:23:50,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 11:23:50,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 11:23:50,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 11:23:50,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 11:23:50,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 11:23:50,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 11:23:50,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 11:23:50,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 11:23:50,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 11:23:50,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 11:23:50,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 11:23:50,633 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 11:23:50,648 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 11:23:50,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 11:23:50,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 11:23:50,651 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 11:23:50,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 11:23:50,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 11:23:50,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 11:23:50,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 11:23:50,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 11:23:50,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 11:23:50,652 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 11:23:50,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 11:23:50,653 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 11:23:50,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 11:23:50,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 11:23:50,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 11:23:50,654 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 11:23:50,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 11:23:50,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:23:50,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 11:23:50,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 11:23:50,654 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 11:23:50,655 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 11:23:50,655 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 11:23:50,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 11:23:51,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 11:23:51,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 11:23:51,010 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 11:23:51,011 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 11:23:51,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_4.i [2021-05-06 11:23:51,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86cf974cf/cda5edb385884814820d42dd34ca674f/FLAG5feebd988 [2021-05-06 11:23:51,446 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 11:23:51,447 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i [2021-05-06 11:23:51,451 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86cf974cf/cda5edb385884814820d42dd34ca674f/FLAG5feebd988 [2021-05-06 11:23:51,463 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86cf974cf/cda5edb385884814820d42dd34ca674f [2021-05-06 11:23:51,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 11:23:51,467 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 11:23:51,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 11:23:51,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 11:23:51,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 11:23:51,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:23:51" (1/1) ... [2021-05-06 11:23:51,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76ee658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:23:51, skipping insertion in model container [2021-05-06 11:23:51,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:23:51" (1/1) ... [2021-05-06 11:23:51,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 11:23:51,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 11:23:51,651 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i[848,861] [2021-05-06 11:23:51,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:23:51,673 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 11:23:51,684 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i[848,861] [2021-05-06 11:23:51,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:23:51,737 INFO L208 MainTranslator]: Completed translation [2021-05-06 11:23:51,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:23:51 WrapperNode [2021-05-06 11:23:51,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 11:23:51,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 11:23:51,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 11:23:51,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 11:23:51,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:23:51" (1/1) ... [2021-05-06 11:23:51,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:23:51" (1/1) ... [2021-05-06 11:23:51,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:23:51" (1/1) ... [2021-05-06 11:23:51,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:23:51" (1/1) ... [2021-05-06 11:23:51,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:23:51" (1/1) ... [2021-05-06 11:23:51,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:23:51" (1/1) ... [2021-05-06 11:23:51,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:23:51" (1/1) ... [2021-05-06 11:23:51,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 11:23:51,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 11:23:51,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 11:23:51,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 11:23:51,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:23:51" (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 [2021-05-06 11:23:51,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 11:23:51,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 11:23:51,868 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 11:23:51,868 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 11:23:51,868 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 11:23:51,869 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 11:23:51,869 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 11:23:51,869 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 11:23:51,869 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 11:23:51,869 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 11:23:51,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 11:23:51,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 11:23:51,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 11:23:51,870 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 11:23:51,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 11:23:51,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 11:23:51,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 11:23:51,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 11:23:51,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 11:23:51,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 11:23:52,124 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 11:23:52,124 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 11:23:52,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:23:52 BoogieIcfgContainer [2021-05-06 11:23:52,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 11:23:52,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 11:23:52,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 11:23:52,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 11:23:52,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 11:23:51" (1/3) ... [2021-05-06 11:23:52,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a47e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:23:52, skipping insertion in model container [2021-05-06 11:23:52,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:23:51" (2/3) ... [2021-05-06 11:23:52,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a47e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:23:52, skipping insertion in model container [2021-05-06 11:23:52,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:23:52" (3/3) ... [2021-05-06 11:23:52,140 INFO L111 eAbstractionObserver]: Analyzing ICFG array_4.i [2021-05-06 11:23:52,153 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 11:23:52,166 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 11:23:52,196 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 11:23:52,237 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 11:23:52,237 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 11:23:52,237 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 11:23:52,237 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 11:23:52,237 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 11:23:52,238 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 11:23:52,238 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 11:23:52,238 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 11:23:52,251 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:23:52,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-06 11:23:52,257 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:52,258 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:52,258 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:52,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:52,266 INFO L82 PathProgramCache]: Analyzing trace with hash -615726646, now seen corresponding path program 1 times [2021-05-06 11:23:52,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:52,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22098569] [2021-05-06 11:23:52,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:52,332 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:52,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:52,524 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:52,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22098569] [2021-05-06 11:23:52,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [22098569] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:52,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:52,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 11:23:52,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308355212] [2021-05-06 11:23:52,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 11:23:52,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:52,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 11:23:52,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:23:52,544 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:52,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:52,611 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-05-06 11:23:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 11:23:52,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-06 11:23:52,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:52,618 INFO L225 Difference]: With dead ends: 40 [2021-05-06 11:23:52,618 INFO L226 Difference]: Without dead ends: 17 [2021-05-06 11:23:52,622 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:23:52,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-06 11:23:52,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-06 11:23:52,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-05-06 11:23:52,656 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-05-06 11:23:52,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:52,657 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-05-06 11:23:52,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:52,658 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-05-06 11:23:52,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 11:23:52,658 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:52,658 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:52,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 11:23:52,659 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:52,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:52,660 INFO L82 PathProgramCache]: Analyzing trace with hash 238110415, now seen corresponding path program 1 times [2021-05-06 11:23:52,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:52,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158205061] [2021-05-06 11:23:52,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:52,666 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:52,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:52,754 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:52,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158205061] [2021-05-06 11:23:52,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [158205061] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:52,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:52,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 11:23:52,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296503299] [2021-05-06 11:23:52,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 11:23:52,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:52,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 11:23:52,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 11:23:52,756 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:52,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:52,841 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-05-06 11:23:52,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 11:23:52,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-06 11:23:52,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:52,844 INFO L225 Difference]: With dead ends: 32 [2021-05-06 11:23:52,844 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 11:23:52,845 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 11:23:52,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 11:23:52,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2021-05-06 11:23:52,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:52,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-05-06 11:23:52,850 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2021-05-06 11:23:52,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:52,851 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-05-06 11:23:52,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:52,851 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-05-06 11:23:52,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-06 11:23:52,851 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:52,851 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:52,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 11:23:52,852 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:52,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:52,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1502803825, now seen corresponding path program 1 times [2021-05-06 11:23:52,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:52,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76367328] [2021-05-06 11:23:52,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:52,873 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:52,874 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:52,878 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:52,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:52,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:52,958 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:52,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76367328] [2021-05-06 11:23:52,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [76367328] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:52,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:52,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 11:23:52,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128136952] [2021-05-06 11:23:52,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 11:23:52,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:52,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 11:23:52,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 11:23:52,961 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:53,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:53,015 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-05-06 11:23:53,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 11:23:53,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-06 11:23:53,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:53,017 INFO L225 Difference]: With dead ends: 38 [2021-05-06 11:23:53,017 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 11:23:53,017 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 11:23:53,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 11:23:53,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2021-05-06 11:23:53,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:53,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-05-06 11:23:53,022 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2021-05-06 11:23:53,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:53,023 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-05-06 11:23:53,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:53,023 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-05-06 11:23:53,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 11:23:53,023 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:53,024 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:53,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 11:23:53,024 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:53,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:53,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1397426067, now seen corresponding path program 2 times [2021-05-06 11:23:53,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:53,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673715270] [2021-05-06 11:23:53,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:53,030 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:53,030 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:53,031 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:53,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:53,105 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:53,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673715270] [2021-05-06 11:23:53,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1673715270] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:53,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:53,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 11:23:53,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244673284] [2021-05-06 11:23:53,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 11:23:53,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:53,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 11:23:53,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 11:23:53,107 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:53,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:53,217 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-05-06 11:23:53,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 11:23:53,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-06 11:23:53,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:53,219 INFO L225 Difference]: With dead ends: 28 [2021-05-06 11:23:53,219 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 11:23:53,220 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-06 11:23:53,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 11:23:53,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-05-06 11:23:53,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:53,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-05-06 11:23:53,230 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2021-05-06 11:23:53,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:53,230 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-05-06 11:23:53,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:53,230 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-05-06 11:23:53,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-06 11:23:53,231 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:53,231 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:53,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 11:23:53,231 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:53,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:53,231 INFO L82 PathProgramCache]: Analyzing trace with hash -706411172, now seen corresponding path program 1 times [2021-05-06 11:23:53,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:53,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281900499] [2021-05-06 11:23:53,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:53,238 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:53,238 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:53,239 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:53,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:53,345 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:53,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281900499] [2021-05-06 11:23:53,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1281900499] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:53,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:53,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 11:23:53,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771988913] [2021-05-06 11:23:53,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 11:23:53,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:53,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 11:23:53,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 11:23:53,349 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:53,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:53,477 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-05-06 11:23:53,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 11:23:53,478 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-06 11:23:53,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:53,480 INFO L225 Difference]: With dead ends: 32 [2021-05-06 11:23:53,480 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 11:23:53,481 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-06 11:23:53,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 11:23:53,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-05-06 11:23:53,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:53,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-05-06 11:23:53,494 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2021-05-06 11:23:53,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:53,494 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-05-06 11:23:53,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:53,495 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-05-06 11:23:53,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 11:23:53,496 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:53,496 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:53,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-06 11:23:53,500 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:53,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:53,501 INFO L82 PathProgramCache]: Analyzing trace with hash 336152307, now seen corresponding path program 2 times [2021-05-06 11:23:53,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:53,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100493800] [2021-05-06 11:23:53,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:53,511 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:53,511 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:53,513 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:53,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:53,589 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:53,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100493800] [2021-05-06 11:23:53,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2100493800] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:53,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:53,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 11:23:53,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255116155] [2021-05-06 11:23:53,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 11:23:53,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:53,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 11:23:53,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 11:23:53,592 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:53,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:53,661 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-05-06 11:23:53,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 11:23:53,661 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-06 11:23:53,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:53,663 INFO L225 Difference]: With dead ends: 47 [2021-05-06 11:23:53,664 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 11:23:53,664 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 11:23:53,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 11:23:53,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2021-05-06 11:23:53,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:53,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-05-06 11:23:53,674 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2021-05-06 11:23:53,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:53,674 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-05-06 11:23:53,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:53,674 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-05-06 11:23:53,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 11:23:53,675 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:53,675 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:53,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-06 11:23:53,676 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:53,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:53,676 INFO L82 PathProgramCache]: Analyzing trace with hash -842525419, now seen corresponding path program 3 times [2021-05-06 11:23:53,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:53,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053208703] [2021-05-06 11:23:53,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:53,683 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:53,684 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:53,685 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:53,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:53,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:53,775 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:53,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053208703] [2021-05-06 11:23:53,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2053208703] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:53,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:53,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 11:23:53,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447470803] [2021-05-06 11:23:53,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 11:23:53,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:53,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 11:23:53,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 11:23:53,776 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:53,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:53,848 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-05-06 11:23:53,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 11:23:53,848 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-06 11:23:53,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:53,849 INFO L225 Difference]: With dead ends: 53 [2021-05-06 11:23:53,849 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 11:23:53,850 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 11:23:53,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 11:23:53,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2021-05-06 11:23:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:53,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-05-06 11:23:53,858 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2021-05-06 11:23:53,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:53,859 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-05-06 11:23:53,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:53,859 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-05-06 11:23:53,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 11:23:53,859 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:53,860 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:53,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-06 11:23:53,860 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:53,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:53,860 INFO L82 PathProgramCache]: Analyzing trace with hash 319546039, now seen corresponding path program 4 times [2021-05-06 11:23:53,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:53,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815593275] [2021-05-06 11:23:53,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:53,869 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:53,870 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:53,871 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:53,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:53,969 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:53,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815593275] [2021-05-06 11:23:53,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [815593275] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:53,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:53,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 11:23:53,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645081884] [2021-05-06 11:23:53,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 11:23:53,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:53,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 11:23:53,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 11:23:53,972 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:54,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:54,050 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-05-06 11:23:54,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 11:23:54,050 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-06 11:23:54,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:54,051 INFO L225 Difference]: With dead ends: 59 [2021-05-06 11:23:54,051 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 11:23:54,054 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 11:23:54,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 11:23:54,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2021-05-06 11:23:54,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:54,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-05-06 11:23:54,063 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2021-05-06 11:23:54,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:54,065 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-05-06 11:23:54,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-05-06 11:23:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 11:23:54,067 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:54,067 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:54,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-06 11:23:54,070 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:54,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:54,071 INFO L82 PathProgramCache]: Analyzing trace with hash 378720217, now seen corresponding path program 5 times [2021-05-06 11:23:54,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:54,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666928634] [2021-05-06 11:23:54,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:54,077 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:54,077 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:54,078 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:54,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:54,173 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:54,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666928634] [2021-05-06 11:23:54,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [666928634] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:54,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:54,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 11:23:54,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499496914] [2021-05-06 11:23:54,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 11:23:54,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:54,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 11:23:54,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 11:23:54,175 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:54,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:54,260 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-05-06 11:23:54,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 11:23:54,261 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-06 11:23:54,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:54,263 INFO L225 Difference]: With dead ends: 65 [2021-05-06 11:23:54,264 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 11:23:54,264 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 11:23:54,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 11:23:54,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2021-05-06 11:23:54,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:54,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-05-06 11:23:54,278 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2021-05-06 11:23:54,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:54,278 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-05-06 11:23:54,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:54,279 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-05-06 11:23:54,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 11:23:54,279 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:54,279 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:54,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-06 11:23:54,280 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:54,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:54,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1410530427, now seen corresponding path program 6 times [2021-05-06 11:23:54,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:54,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213932155] [2021-05-06 11:23:54,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:54,285 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:54,286 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:54,287 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:54,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:54,403 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:54,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213932155] [2021-05-06 11:23:54,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1213932155] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:54,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:54,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-06 11:23:54,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178142207] [2021-05-06 11:23:54,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 11:23:54,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:54,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 11:23:54,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 11:23:54,405 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:54,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:54,499 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2021-05-06 11:23:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 11:23:54,499 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-06 11:23:54,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:54,500 INFO L225 Difference]: With dead ends: 71 [2021-05-06 11:23:54,500 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 11:23:54,501 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 11:23:54,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 11:23:54,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 35. [2021-05-06 11:23:54,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:54,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-05-06 11:23:54,518 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2021-05-06 11:23:54,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:54,518 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-05-06 11:23:54,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:54,518 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-05-06 11:23:54,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 11:23:54,522 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:54,522 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:54,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-06 11:23:54,522 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:54,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:54,523 INFO L82 PathProgramCache]: Analyzing trace with hash 842696861, now seen corresponding path program 7 times [2021-05-06 11:23:54,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:54,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633280780] [2021-05-06 11:23:54,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:54,528 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:54,528 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:54,529 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:54,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:54,647 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:54,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633280780] [2021-05-06 11:23:54,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1633280780] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:54,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:54,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-06 11:23:54,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455196452] [2021-05-06 11:23:54,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 11:23:54,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:54,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 11:23:54,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 11:23:54,649 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:54,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:54,729 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2021-05-06 11:23:54,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 11:23:54,730 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-06 11:23:54,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:54,730 INFO L225 Difference]: With dead ends: 77 [2021-05-06 11:23:54,731 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 11:23:54,731 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 11:23:54,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 11:23:54,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 37. [2021-05-06 11:23:54,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:54,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-05-06 11:23:54,735 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2021-05-06 11:23:54,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:54,735 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-05-06 11:23:54,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:54,735 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-05-06 11:23:54,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 11:23:54,736 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:54,736 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:54,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-06 11:23:54,736 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:54,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:54,736 INFO L82 PathProgramCache]: Analyzing trace with hash 615486527, now seen corresponding path program 8 times [2021-05-06 11:23:54,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:54,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251817203] [2021-05-06 11:23:54,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:54,741 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:54,741 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:54,742 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:54,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:54,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:54,844 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:54,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251817203] [2021-05-06 11:23:54,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [251817203] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:54,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:54,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-06 11:23:54,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151957395] [2021-05-06 11:23:54,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 11:23:54,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:54,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 11:23:54,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 11:23:54,846 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:54,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:54,939 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2021-05-06 11:23:54,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 11:23:54,940 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-06 11:23:54,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:54,940 INFO L225 Difference]: With dead ends: 83 [2021-05-06 11:23:54,940 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 11:23:54,941 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 11:23:54,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 11:23:54,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2021-05-06 11:23:54,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:54,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-05-06 11:23:54,945 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2021-05-06 11:23:54,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:54,945 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-05-06 11:23:54,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:54,945 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-05-06 11:23:54,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 11:23:54,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:54,946 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:54,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-06 11:23:54,946 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:54,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:54,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1309687649, now seen corresponding path program 9 times [2021-05-06 11:23:54,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:54,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81933239] [2021-05-06 11:23:54,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:54,951 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:54,951 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:54,952 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:55,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:55,063 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:55,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81933239] [2021-05-06 11:23:55,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [81933239] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:55,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:55,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-06 11:23:55,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678995995] [2021-05-06 11:23:55,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 11:23:55,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:55,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 11:23:55,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 11:23:55,065 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:55,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:55,190 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2021-05-06 11:23:55,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 11:23:55,190 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-06 11:23:55,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:55,191 INFO L225 Difference]: With dead ends: 89 [2021-05-06 11:23:55,191 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 11:23:55,191 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 11:23:55,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 11:23:55,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 41. [2021-05-06 11:23:55,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:55,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-05-06 11:23:55,195 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2021-05-06 11:23:55,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:55,195 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-05-06 11:23:55,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:55,196 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-05-06 11:23:55,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 11:23:55,196 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:55,196 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:55,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-06 11:23:55,196 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:55,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:55,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1577932285, now seen corresponding path program 10 times [2021-05-06 11:23:55,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:55,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768778079] [2021-05-06 11:23:55,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:55,201 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:55,201 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:55,202 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:55,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:55,323 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:55,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768778079] [2021-05-06 11:23:55,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1768778079] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:55,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:55,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-06 11:23:55,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069477074] [2021-05-06 11:23:55,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 11:23:55,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:55,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 11:23:55,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 11:23:55,324 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:55,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:55,430 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2021-05-06 11:23:55,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 11:23:55,431 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-06 11:23:55,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:55,432 INFO L225 Difference]: With dead ends: 95 [2021-05-06 11:23:55,432 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 11:23:55,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 11:23:55,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 11:23:55,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 43. [2021-05-06 11:23:55,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:55,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-05-06 11:23:55,436 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2021-05-06 11:23:55,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:55,437 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-05-06 11:23:55,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:55,437 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-05-06 11:23:55,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 11:23:55,437 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:55,437 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:55,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-06 11:23:55,438 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:55,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:55,438 INFO L82 PathProgramCache]: Analyzing trace with hash -2031815643, now seen corresponding path program 11 times [2021-05-06 11:23:55,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:55,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559984801] [2021-05-06 11:23:55,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:55,443 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:55,443 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:55,444 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:55,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:55,581 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:55,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559984801] [2021-05-06 11:23:55,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [559984801] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:55,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:55,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-06 11:23:55,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016346766] [2021-05-06 11:23:55,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 11:23:55,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:55,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 11:23:55,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 11:23:55,582 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:55,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:55,688 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2021-05-06 11:23:55,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 11:23:55,688 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-06 11:23:55,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:55,689 INFO L225 Difference]: With dead ends: 101 [2021-05-06 11:23:55,689 INFO L226 Difference]: Without dead ends: 87 [2021-05-06 11:23:55,690 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 11:23:55,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-06 11:23:55,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 45. [2021-05-06 11:23:55,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:55,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-05-06 11:23:55,694 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2021-05-06 11:23:55,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:55,694 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-05-06 11:23:55,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:55,694 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-05-06 11:23:55,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 11:23:55,695 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:55,695 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:55,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-06 11:23:55,695 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:55,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:55,696 INFO L82 PathProgramCache]: Analyzing trace with hash -127058489, now seen corresponding path program 12 times [2021-05-06 11:23:55,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:55,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802075785] [2021-05-06 11:23:55,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:55,702 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:55,702 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:55,703 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:55,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:55,876 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:55,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802075785] [2021-05-06 11:23:55,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1802075785] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:55,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:55,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-06 11:23:55,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027081838] [2021-05-06 11:23:55,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 11:23:55,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:55,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 11:23:55,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 11:23:55,878 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:56,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:56,001 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2021-05-06 11:23:56,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 11:23:56,002 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-06 11:23:56,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:56,003 INFO L225 Difference]: With dead ends: 107 [2021-05-06 11:23:56,003 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 11:23:56,003 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 11:23:56,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 11:23:56,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 47. [2021-05-06 11:23:56,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:56,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-05-06 11:23:56,007 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2021-05-06 11:23:56,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:56,007 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-05-06 11:23:56,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:56,008 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-05-06 11:23:56,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 11:23:56,008 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:56,008 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:56,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-06 11:23:56,008 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:56,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:56,009 INFO L82 PathProgramCache]: Analyzing trace with hash 688498409, now seen corresponding path program 13 times [2021-05-06 11:23:56,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:56,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569605165] [2021-05-06 11:23:56,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:56,015 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:56,015 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:56,016 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:56,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:56,191 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:56,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569605165] [2021-05-06 11:23:56,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [569605165] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:56,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:56,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-06 11:23:56,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432252183] [2021-05-06 11:23:56,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 11:23:56,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:56,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 11:23:56,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-06 11:23:56,193 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:56,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:56,312 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2021-05-06 11:23:56,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 11:23:56,312 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-06 11:23:56,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:56,313 INFO L225 Difference]: With dead ends: 113 [2021-05-06 11:23:56,313 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 11:23:56,314 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-06 11:23:56,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 11:23:56,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 49. [2021-05-06 11:23:56,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-05-06 11:23:56,319 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2021-05-06 11:23:56,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:56,320 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-05-06 11:23:56,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:56,320 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-05-06 11:23:56,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 11:23:56,321 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:56,321 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:56,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-06 11:23:56,321 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:56,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:56,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1540337781, now seen corresponding path program 14 times [2021-05-06 11:23:56,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:56,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633036290] [2021-05-06 11:23:56,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:56,327 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:56,328 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:56,329 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:56,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:56,536 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:56,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633036290] [2021-05-06 11:23:56,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1633036290] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:56,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:56,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-06 11:23:56,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681543932] [2021-05-06 11:23:56,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 11:23:56,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:56,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 11:23:56,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-06 11:23:56,538 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:56,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:56,690 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2021-05-06 11:23:56,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 11:23:56,690 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-06 11:23:56,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:56,691 INFO L225 Difference]: With dead ends: 119 [2021-05-06 11:23:56,692 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 11:23:56,692 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-06 11:23:56,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 11:23:56,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 51. [2021-05-06 11:23:56,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:56,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-05-06 11:23:56,700 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2021-05-06 11:23:56,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:56,700 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-05-06 11:23:56,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:56,700 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-05-06 11:23:56,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 11:23:56,701 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:56,701 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:56,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-06 11:23:56,701 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:56,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:56,701 INFO L82 PathProgramCache]: Analyzing trace with hash -263235667, now seen corresponding path program 15 times [2021-05-06 11:23:56,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:56,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36823577] [2021-05-06 11:23:56,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:56,707 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:56,707 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:56,708 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:56,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:56,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:56,907 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:56,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36823577] [2021-05-06 11:23:56,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [36823577] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:56,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:56,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-06 11:23:56,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948351320] [2021-05-06 11:23:56,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 11:23:56,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:56,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 11:23:56,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-06 11:23:56,908 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:57,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:57,040 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2021-05-06 11:23:57,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 11:23:57,041 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-06 11:23:57,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:57,042 INFO L225 Difference]: With dead ends: 125 [2021-05-06 11:23:57,042 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 11:23:57,042 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-06 11:23:57,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 11:23:57,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 53. [2021-05-06 11:23:57,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:57,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-05-06 11:23:57,047 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2021-05-06 11:23:57,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:57,047 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-05-06 11:23:57,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:57,048 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-05-06 11:23:57,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 11:23:57,048 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:57,048 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:57,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-06 11:23:57,048 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:57,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:57,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1328750769, now seen corresponding path program 16 times [2021-05-06 11:23:57,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:57,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027941994] [2021-05-06 11:23:57,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:57,054 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:57,054 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:57,055 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:57,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:57,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:57,313 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:57,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027941994] [2021-05-06 11:23:57,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1027941994] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:57,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:57,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-06 11:23:57,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112139443] [2021-05-06 11:23:57,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 11:23:57,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:57,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 11:23:57,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-06 11:23:57,315 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:57,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:57,549 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2021-05-06 11:23:57,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 11:23:57,549 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-06 11:23:57,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:57,550 INFO L225 Difference]: With dead ends: 131 [2021-05-06 11:23:57,550 INFO L226 Difference]: Without dead ends: 117 [2021-05-06 11:23:57,551 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 223.7ms TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-06 11:23:57,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-06 11:23:57,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 55. [2021-05-06 11:23:57,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:57,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-05-06 11:23:57,556 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2021-05-06 11:23:57,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:57,556 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-05-06 11:23:57,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:57,557 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-05-06 11:23:57,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 11:23:57,557 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:57,557 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:57,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-06 11:23:57,557 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:57,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:57,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1208419953, now seen corresponding path program 17 times [2021-05-06 11:23:57,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:57,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987948285] [2021-05-06 11:23:57,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:57,562 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:57,562 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:57,563 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:57,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:57,805 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:57,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987948285] [2021-05-06 11:23:57,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [987948285] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:57,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:57,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-06 11:23:57,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585282624] [2021-05-06 11:23:57,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 11:23:57,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:57,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 11:23:57,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-06 11:23:57,809 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:57,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:57,975 INFO L93 Difference]: Finished difference Result 137 states and 155 transitions. [2021-05-06 11:23:57,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 11:23:57,976 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-05-06 11:23:57,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:57,977 INFO L225 Difference]: With dead ends: 137 [2021-05-06 11:23:57,977 INFO L226 Difference]: Without dead ends: 123 [2021-05-06 11:23:57,978 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 204.9ms TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-06 11:23:57,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-06 11:23:57,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 57. [2021-05-06 11:23:57,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:57,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-05-06 11:23:57,984 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2021-05-06 11:23:57,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:57,984 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-05-06 11:23:57,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:57,984 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-05-06 11:23:57,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 11:23:57,985 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:57,985 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:57,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-06 11:23:57,985 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:57,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:57,985 INFO L82 PathProgramCache]: Analyzing trace with hash -111940333, now seen corresponding path program 18 times [2021-05-06 11:23:57,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:57,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332716561] [2021-05-06 11:23:57,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:57,990 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:57,990 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:57,992 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:58,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:58,240 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:58,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332716561] [2021-05-06 11:23:58,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1332716561] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:58,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:58,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-06 11:23:58,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305914646] [2021-05-06 11:23:58,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 11:23:58,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:58,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 11:23:58,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-06 11:23:58,242 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:58,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:58,422 INFO L93 Difference]: Finished difference Result 143 states and 162 transitions. [2021-05-06 11:23:58,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 11:23:58,422 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-06 11:23:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:58,423 INFO L225 Difference]: With dead ends: 143 [2021-05-06 11:23:58,423 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 11:23:58,424 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 198.8ms TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-06 11:23:58,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 11:23:58,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 59. [2021-05-06 11:23:58,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:58,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-05-06 11:23:58,428 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2021-05-06 11:23:58,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:58,429 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-05-06 11:23:58,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:58,429 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-05-06 11:23:58,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 11:23:58,429 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:58,429 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:58,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-06 11:23:58,429 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:58,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:58,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1962822859, now seen corresponding path program 19 times [2021-05-06 11:23:58,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:58,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692325368] [2021-05-06 11:23:58,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:58,434 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:58,434 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:58,435 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:58,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:58,699 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:58,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692325368] [2021-05-06 11:23:58,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1692325368] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:58,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:58,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-06 11:23:58,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282168765] [2021-05-06 11:23:58,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 11:23:58,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:58,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 11:23:58,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-06 11:23:58,700 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:58,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:58,884 INFO L93 Difference]: Finished difference Result 149 states and 169 transitions. [2021-05-06 11:23:58,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-06 11:23:58,885 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-06 11:23:58,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:58,886 INFO L225 Difference]: With dead ends: 149 [2021-05-06 11:23:58,886 INFO L226 Difference]: Without dead ends: 135 [2021-05-06 11:23:58,887 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 222.5ms TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-06 11:23:58,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-06 11:23:58,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 61. [2021-05-06 11:23:58,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:58,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-05-06 11:23:58,893 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2021-05-06 11:23:58,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:58,893 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-05-06 11:23:58,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:58,893 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-05-06 11:23:58,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 11:23:58,893 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:58,893 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:58,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-06 11:23:58,894 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:58,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:58,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1750497495, now seen corresponding path program 20 times [2021-05-06 11:23:58,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:58,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474347573] [2021-05-06 11:23:58,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:58,901 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:58,901 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:58,902 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:59,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:59,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:59,205 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:59,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474347573] [2021-05-06 11:23:59,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1474347573] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:59,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:59,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-06 11:23:59,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029819337] [2021-05-06 11:23:59,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-06 11:23:59,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:59,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-06 11:23:59,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-06 11:23:59,207 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:59,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:59,412 INFO L93 Difference]: Finished difference Result 155 states and 176 transitions. [2021-05-06 11:23:59,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 11:23:59,412 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-06 11:23:59,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:59,413 INFO L225 Difference]: With dead ends: 155 [2021-05-06 11:23:59,413 INFO L226 Difference]: Without dead ends: 141 [2021-05-06 11:23:59,414 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 260.0ms TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-06 11:23:59,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-06 11:23:59,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 63. [2021-05-06 11:23:59,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:59,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-05-06 11:23:59,421 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2021-05-06 11:23:59,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:59,421 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-05-06 11:23:59,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:59,421 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-05-06 11:23:59,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 11:23:59,421 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:59,422 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:59,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-06 11:23:59,422 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:59,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:59,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1133534713, now seen corresponding path program 21 times [2021-05-06 11:23:59,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:59,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900306498] [2021-05-06 11:23:59,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:59,428 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:59,428 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:59,429 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:59,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:59,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:59,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:59,735 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:59,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900306498] [2021-05-06 11:23:59,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1900306498] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:59,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:59,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-06 11:23:59,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328929283] [2021-05-06 11:23:59,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-06 11:23:59,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:59,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-06 11:23:59,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-06 11:23:59,736 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:59,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:59,930 INFO L93 Difference]: Finished difference Result 161 states and 183 transitions. [2021-05-06 11:23:59,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-06 11:23:59,931 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-06 11:23:59,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:59,932 INFO L225 Difference]: With dead ends: 161 [2021-05-06 11:23:59,932 INFO L226 Difference]: Without dead ends: 147 [2021-05-06 11:23:59,932 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 269.0ms TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-06 11:23:59,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-06 11:23:59,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 65. [2021-05-06 11:23:59,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:59,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-05-06 11:23:59,940 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2021-05-06 11:23:59,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:59,940 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-05-06 11:23:59,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:59,941 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-05-06 11:23:59,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 11:23:59,941 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:59,941 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:59,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-06 11:23:59,942 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:59,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:59,942 INFO L82 PathProgramCache]: Analyzing trace with hash 937788059, now seen corresponding path program 22 times [2021-05-06 11:23:59,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:59,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708934801] [2021-05-06 11:23:59,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:59,947 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:59,948 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:59,949 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:00,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:00,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:00,308 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:00,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708934801] [2021-05-06 11:24:00,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [708934801] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:00,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:00,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-06 11:24:00,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832935845] [2021-05-06 11:24:00,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-06 11:24:00,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:00,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-06 11:24:00,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-06 11:24:00,311 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:00,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:00,503 INFO L93 Difference]: Finished difference Result 167 states and 190 transitions. [2021-05-06 11:24:00,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 11:24:00,503 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-05-06 11:24:00,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:00,504 INFO L225 Difference]: With dead ends: 167 [2021-05-06 11:24:00,504 INFO L226 Difference]: Without dead ends: 153 [2021-05-06 11:24:00,505 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 304.7ms TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-06 11:24:00,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-06 11:24:00,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 67. [2021-05-06 11:24:00,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:00,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-05-06 11:24:00,512 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2021-05-06 11:24:00,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:00,512 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-05-06 11:24:00,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:00,512 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-05-06 11:24:00,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 11:24:00,513 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:00,513 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:00,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-06 11:24:00,513 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:00,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:00,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1803814589, now seen corresponding path program 23 times [2021-05-06 11:24:00,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:00,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975949100] [2021-05-06 11:24:00,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:00,520 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:00,520 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:00,521 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:00,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:00,918 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:00,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975949100] [2021-05-06 11:24:00,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1975949100] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:00,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:00,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-06 11:24:00,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437823614] [2021-05-06 11:24:00,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-06 11:24:00,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:00,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-06 11:24:00,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-06 11:24:00,920 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:01,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:01,159 INFO L93 Difference]: Finished difference Result 173 states and 197 transitions. [2021-05-06 11:24:01,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-06 11:24:01,159 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-05-06 11:24:01,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:01,160 INFO L225 Difference]: With dead ends: 173 [2021-05-06 11:24:01,161 INFO L226 Difference]: Without dead ends: 159 [2021-05-06 11:24:01,162 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 332.9ms TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-06 11:24:01,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-06 11:24:01,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 69. [2021-05-06 11:24:01,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:01,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-05-06 11:24:01,170 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2021-05-06 11:24:01,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:01,170 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-05-06 11:24:01,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:01,170 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-05-06 11:24:01,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 11:24:01,171 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:01,171 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:01,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-06 11:24:01,171 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:01,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:01,171 INFO L82 PathProgramCache]: Analyzing trace with hash 831654495, now seen corresponding path program 24 times [2021-05-06 11:24:01,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:01,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446116892] [2021-05-06 11:24:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:01,176 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:01,176 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:01,177 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:01,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:01,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:01,562 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:01,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446116892] [2021-05-06 11:24:01,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [446116892] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:01,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:01,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-06 11:24:01,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670529756] [2021-05-06 11:24:01,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-06 11:24:01,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:01,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-06 11:24:01,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-06 11:24:01,563 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:01,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:01,801 INFO L93 Difference]: Finished difference Result 179 states and 204 transitions. [2021-05-06 11:24:01,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 11:24:01,802 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-05-06 11:24:01,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:01,803 INFO L225 Difference]: With dead ends: 179 [2021-05-06 11:24:01,803 INFO L226 Difference]: Without dead ends: 165 [2021-05-06 11:24:01,803 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 317.2ms TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-06 11:24:01,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-06 11:24:01,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 71. [2021-05-06 11:24:01,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:01,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-05-06 11:24:01,810 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2021-05-06 11:24:01,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:01,811 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-05-06 11:24:01,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:01,811 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-05-06 11:24:01,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 11:24:01,811 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:01,811 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:01,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-06 11:24:01,812 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:01,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:01,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1406292607, now seen corresponding path program 25 times [2021-05-06 11:24:01,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:01,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727162850] [2021-05-06 11:24:01,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:01,820 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:01,820 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:01,821 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:02,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:02,184 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:02,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727162850] [2021-05-06 11:24:02,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [727162850] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:02,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:02,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-06 11:24:02,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552772879] [2021-05-06 11:24:02,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-06 11:24:02,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:02,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-06 11:24:02,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-06 11:24:02,185 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:02,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:02,427 INFO L93 Difference]: Finished difference Result 185 states and 211 transitions. [2021-05-06 11:24:02,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-06 11:24:02,427 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-06 11:24:02,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:02,428 INFO L225 Difference]: With dead ends: 185 [2021-05-06 11:24:02,428 INFO L226 Difference]: Without dead ends: 171 [2021-05-06 11:24:02,429 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 320.9ms TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-06 11:24:02,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-06 11:24:02,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 73. [2021-05-06 11:24:02,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:02,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-05-06 11:24:02,436 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2021-05-06 11:24:02,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:02,436 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-05-06 11:24:02,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:02,437 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-05-06 11:24:02,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 11:24:02,437 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:02,437 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:02,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-06 11:24:02,438 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:02,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:02,438 INFO L82 PathProgramCache]: Analyzing trace with hash -294842333, now seen corresponding path program 26 times [2021-05-06 11:24:02,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:02,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167768016] [2021-05-06 11:24:02,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:02,442 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:02,442 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:02,444 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:02,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:02,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:02,858 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:02,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167768016] [2021-05-06 11:24:02,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1167768016] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:02,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:02,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-06 11:24:02,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124413944] [2021-05-06 11:24:02,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-06 11:24:02,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:02,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-06 11:24:02,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-06 11:24:02,860 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:03,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:03,092 INFO L93 Difference]: Finished difference Result 191 states and 218 transitions. [2021-05-06 11:24:03,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 11:24:03,093 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-06 11:24:03,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:03,094 INFO L225 Difference]: With dead ends: 191 [2021-05-06 11:24:03,094 INFO L226 Difference]: Without dead ends: 177 [2021-05-06 11:24:03,097 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 365.9ms TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-06 11:24:03,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-06 11:24:03,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 75. [2021-05-06 11:24:03,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:03,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-05-06 11:24:03,105 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2021-05-06 11:24:03,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:03,105 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-05-06 11:24:03,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:03,105 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-05-06 11:24:03,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 11:24:03,106 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:03,106 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:03,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-06 11:24:03,106 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:03,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:03,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1637985723, now seen corresponding path program 27 times [2021-05-06 11:24:03,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:03,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352328924] [2021-05-06 11:24:03,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:03,111 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:03,111 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:03,113 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:03,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:03,535 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:03,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352328924] [2021-05-06 11:24:03,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [352328924] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:03,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:03,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-06 11:24:03,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969313375] [2021-05-06 11:24:03,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-06 11:24:03,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:03,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-06 11:24:03,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-06 11:24:03,536 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:03,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:03,756 INFO L93 Difference]: Finished difference Result 197 states and 225 transitions. [2021-05-06 11:24:03,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-06 11:24:03,757 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-06 11:24:03,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:03,757 INFO L225 Difference]: With dead ends: 197 [2021-05-06 11:24:03,758 INFO L226 Difference]: Without dead ends: 183 [2021-05-06 11:24:03,758 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 377.7ms TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-06 11:24:03,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-06 11:24:03,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 77. [2021-05-06 11:24:03,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:03,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-05-06 11:24:03,766 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2021-05-06 11:24:03,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:03,766 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-05-06 11:24:03,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:03,766 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-05-06 11:24:03,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 11:24:03,767 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:03,767 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:03,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-06 11:24:03,767 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:03,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:03,767 INFO L82 PathProgramCache]: Analyzing trace with hash 386372583, now seen corresponding path program 28 times [2021-05-06 11:24:03,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:03,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686523833] [2021-05-06 11:24:03,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:03,772 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:03,772 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:03,773 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:04,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:04,242 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:04,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686523833] [2021-05-06 11:24:04,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1686523833] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:04,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:04,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-06 11:24:04,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208462831] [2021-05-06 11:24:04,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-06 11:24:04,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:04,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-06 11:24:04,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-06 11:24:04,245 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:04,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:04,506 INFO L93 Difference]: Finished difference Result 203 states and 232 transitions. [2021-05-06 11:24:04,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 11:24:04,506 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-06 11:24:04,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:04,507 INFO L225 Difference]: With dead ends: 203 [2021-05-06 11:24:04,508 INFO L226 Difference]: Without dead ends: 189 [2021-05-06 11:24:04,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 425.7ms TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-06 11:24:04,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-06 11:24:04,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 79. [2021-05-06 11:24:04,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:04,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2021-05-06 11:24:04,518 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2021-05-06 11:24:04,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:04,518 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2021-05-06 11:24:04,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:04,518 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2021-05-06 11:24:04,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 11:24:04,519 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:04,519 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:04,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-06 11:24:04,519 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:04,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:04,520 INFO L82 PathProgramCache]: Analyzing trace with hash 174519561, now seen corresponding path program 29 times [2021-05-06 11:24:04,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:04,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957947794] [2021-05-06 11:24:04,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:04,524 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:04,524 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:04,525 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:05,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:05,019 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:05,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957947794] [2021-05-06 11:24:05,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [957947794] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:05,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:05,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-06 11:24:05,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287375955] [2021-05-06 11:24:05,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-06 11:24:05,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:05,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-06 11:24:05,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 11:24:05,020 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:05,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:05,294 INFO L93 Difference]: Finished difference Result 209 states and 239 transitions. [2021-05-06 11:24:05,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-06 11:24:05,295 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-05-06 11:24:05,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:05,296 INFO L225 Difference]: With dead ends: 209 [2021-05-06 11:24:05,296 INFO L226 Difference]: Without dead ends: 195 [2021-05-06 11:24:05,297 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 444.8ms TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 11:24:05,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-06 11:24:05,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 81. [2021-05-06 11:24:05,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:05,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-05-06 11:24:05,305 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2021-05-06 11:24:05,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:05,305 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-05-06 11:24:05,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:05,305 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-05-06 11:24:05,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 11:24:05,306 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:05,306 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:05,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-06 11:24:05,307 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:05,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:05,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1552771669, now seen corresponding path program 30 times [2021-05-06 11:24:05,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:05,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301564345] [2021-05-06 11:24:05,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:05,311 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:05,311 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:05,312 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:05,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:05,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:05,817 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:05,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301564345] [2021-05-06 11:24:05,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1301564345] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:05,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:05,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-06 11:24:05,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554344547] [2021-05-06 11:24:05,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-06 11:24:05,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:05,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-06 11:24:05,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 11:24:05,819 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:06,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:06,099 INFO L93 Difference]: Finished difference Result 215 states and 246 transitions. [2021-05-06 11:24:06,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-06 11:24:06,099 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2021-05-06 11:24:06,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:06,100 INFO L225 Difference]: With dead ends: 215 [2021-05-06 11:24:06,100 INFO L226 Difference]: Without dead ends: 201 [2021-05-06 11:24:06,101 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 447.5ms TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 11:24:06,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-06 11:24:06,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 83. [2021-05-06 11:24:06,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:06,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-05-06 11:24:06,109 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2021-05-06 11:24:06,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:06,110 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-05-06 11:24:06,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:06,110 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-05-06 11:24:06,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 11:24:06,110 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:06,110 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:06,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-06 11:24:06,111 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:06,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:06,111 INFO L82 PathProgramCache]: Analyzing trace with hash 672699853, now seen corresponding path program 31 times [2021-05-06 11:24:06,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:06,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768306512] [2021-05-06 11:24:06,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:06,116 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:06,116 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:06,116 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:06,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:06,689 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:06,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768306512] [2021-05-06 11:24:06,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1768306512] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:06,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:06,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-06 11:24:06,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950301234] [2021-05-06 11:24:06,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-06 11:24:06,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:06,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-06 11:24:06,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 11:24:06,691 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:06,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:06,956 INFO L93 Difference]: Finished difference Result 221 states and 253 transitions. [2021-05-06 11:24:06,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-06 11:24:06,957 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-06 11:24:06,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:06,957 INFO L225 Difference]: With dead ends: 221 [2021-05-06 11:24:06,958 INFO L226 Difference]: Without dead ends: 207 [2021-05-06 11:24:06,958 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 504.8ms TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 11:24:06,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-06 11:24:06,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 85. [2021-05-06 11:24:06,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:06,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-05-06 11:24:06,968 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2021-05-06 11:24:06,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:06,968 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-05-06 11:24:06,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:06,968 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-05-06 11:24:06,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-06 11:24:06,969 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:06,969 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:06,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-06 11:24:06,969 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:06,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:06,969 INFO L82 PathProgramCache]: Analyzing trace with hash 457119087, now seen corresponding path program 32 times [2021-05-06 11:24:06,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:06,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754358690] [2021-05-06 11:24:06,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:06,973 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:06,974 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:06,975 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:07,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:07,505 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:07,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754358690] [2021-05-06 11:24:07,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1754358690] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:07,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:07,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-06 11:24:07,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894703761] [2021-05-06 11:24:07,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-06 11:24:07,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:07,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-06 11:24:07,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 11:24:07,507 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:07,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:07,800 INFO L93 Difference]: Finished difference Result 227 states and 260 transitions. [2021-05-06 11:24:07,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-06 11:24:07,801 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-05-06 11:24:07,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:07,802 INFO L225 Difference]: With dead ends: 227 [2021-05-06 11:24:07,802 INFO L226 Difference]: Without dead ends: 213 [2021-05-06 11:24:07,802 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 478.6ms TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 11:24:07,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-06 11:24:07,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 87. [2021-05-06 11:24:07,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:07,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-05-06 11:24:07,809 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2021-05-06 11:24:07,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:07,809 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-05-06 11:24:07,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:07,809 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-05-06 11:24:07,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 11:24:07,810 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:07,810 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:07,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-06 11:24:07,810 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:07,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:07,811 INFO L82 PathProgramCache]: Analyzing trace with hash -557566831, now seen corresponding path program 33 times [2021-05-06 11:24:07,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:07,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440407547] [2021-05-06 11:24:07,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:07,815 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:07,815 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:07,816 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:08,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:08,380 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:08,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440407547] [2021-05-06 11:24:08,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [440407547] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:08,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:08,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-06 11:24:08,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285276994] [2021-05-06 11:24:08,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-06 11:24:08,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:08,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-06 11:24:08,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-06 11:24:08,382 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:08,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:08,710 INFO L93 Difference]: Finished difference Result 233 states and 267 transitions. [2021-05-06 11:24:08,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-06 11:24:08,710 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2021-05-06 11:24:08,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:08,712 INFO L225 Difference]: With dead ends: 233 [2021-05-06 11:24:08,712 INFO L226 Difference]: Without dead ends: 219 [2021-05-06 11:24:08,713 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 516.6ms TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-06 11:24:08,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-06 11:24:08,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 89. [2021-05-06 11:24:08,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:08,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-05-06 11:24:08,723 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2021-05-06 11:24:08,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:08,724 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-05-06 11:24:08,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:08,724 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-05-06 11:24:08,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-06 11:24:08,724 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:08,724 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:08,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-06 11:24:08,725 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:08,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:08,725 INFO L82 PathProgramCache]: Analyzing trace with hash -713157837, now seen corresponding path program 34 times [2021-05-06 11:24:08,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:08,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487404115] [2021-05-06 11:24:08,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:08,729 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:08,730 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:08,731 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:09,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:09,371 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:09,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487404115] [2021-05-06 11:24:09,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1487404115] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:09,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:09,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-06 11:24:09,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023392961] [2021-05-06 11:24:09,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-06 11:24:09,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:09,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-06 11:24:09,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 11:24:09,373 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:09,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:09,677 INFO L93 Difference]: Finished difference Result 239 states and 274 transitions. [2021-05-06 11:24:09,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-06 11:24:09,678 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-05-06 11:24:09,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:09,679 INFO L225 Difference]: With dead ends: 239 [2021-05-06 11:24:09,679 INFO L226 Difference]: Without dead ends: 225 [2021-05-06 11:24:09,679 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 588.9ms TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 11:24:09,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-06 11:24:09,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 91. [2021-05-06 11:24:09,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:09,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2021-05-06 11:24:09,690 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2021-05-06 11:24:09,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:09,690 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2021-05-06 11:24:09,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:09,690 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2021-05-06 11:24:09,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 11:24:09,690 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:09,691 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:09,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-06 11:24:09,691 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:09,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:09,691 INFO L82 PathProgramCache]: Analyzing trace with hash 87740757, now seen corresponding path program 35 times [2021-05-06 11:24:09,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:09,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143459300] [2021-05-06 11:24:09,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:09,696 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:09,696 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:09,696 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:10,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:10,369 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:10,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143459300] [2021-05-06 11:24:10,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2143459300] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:10,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:10,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-06 11:24:10,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060856401] [2021-05-06 11:24:10,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-06 11:24:10,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:10,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-06 11:24:10,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-06 11:24:10,371 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:10,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:10,687 INFO L93 Difference]: Finished difference Result 245 states and 281 transitions. [2021-05-06 11:24:10,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-06 11:24:10,687 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2021-05-06 11:24:10,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:10,688 INFO L225 Difference]: With dead ends: 245 [2021-05-06 11:24:10,688 INFO L226 Difference]: Without dead ends: 231 [2021-05-06 11:24:10,689 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 611.5ms TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-06 11:24:10,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-06 11:24:10,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 93. [2021-05-06 11:24:10,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:10,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-05-06 11:24:10,700 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2021-05-06 11:24:10,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:10,700 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-05-06 11:24:10,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:10,700 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-05-06 11:24:10,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 11:24:10,700 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:10,700 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:10,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-06 11:24:10,701 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:10,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:10,701 INFO L82 PathProgramCache]: Analyzing trace with hash 952143607, now seen corresponding path program 36 times [2021-05-06 11:24:10,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:10,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942896591] [2021-05-06 11:24:10,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:10,705 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:10,705 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:10,706 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:11,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:11,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:11,349 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:11,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942896591] [2021-05-06 11:24:11,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1942896591] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:11,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:11,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-06 11:24:11,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708505471] [2021-05-06 11:24:11,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-06 11:24:11,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:11,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-06 11:24:11,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 11:24:11,351 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:11,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:11,697 INFO L93 Difference]: Finished difference Result 251 states and 288 transitions. [2021-05-06 11:24:11,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-06 11:24:11,698 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-05-06 11:24:11,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:11,699 INFO L225 Difference]: With dead ends: 251 [2021-05-06 11:24:11,699 INFO L226 Difference]: Without dead ends: 237 [2021-05-06 11:24:11,700 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 575.1ms TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 11:24:11,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-06 11:24:11,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 95. [2021-05-06 11:24:11,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:11,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-05-06 11:24:11,711 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2021-05-06 11:24:11,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:11,711 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-05-06 11:24:11,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:11,711 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-05-06 11:24:11,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 11:24:11,712 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:11,712 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:11,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-06 11:24:11,712 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:11,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:11,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1580372967, now seen corresponding path program 37 times [2021-05-06 11:24:11,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:11,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925921116] [2021-05-06 11:24:11,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:11,717 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:11,717 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:11,718 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:12,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:12,393 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:12,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925921116] [2021-05-06 11:24:12,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1925921116] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:12,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:12,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-06 11:24:12,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143475569] [2021-05-06 11:24:12,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-06 11:24:12,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:12,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-06 11:24:12,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-06 11:24:12,395 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:12,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:12,702 INFO L93 Difference]: Finished difference Result 257 states and 295 transitions. [2021-05-06 11:24:12,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-06 11:24:12,702 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-05-06 11:24:12,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:12,704 INFO L225 Difference]: With dead ends: 257 [2021-05-06 11:24:12,704 INFO L226 Difference]: Without dead ends: 243 [2021-05-06 11:24:12,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 614.0ms TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-06 11:24:12,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-06 11:24:12,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 97. [2021-05-06 11:24:12,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:12,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2021-05-06 11:24:12,716 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2021-05-06 11:24:12,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:12,716 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2021-05-06 11:24:12,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:12,716 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2021-05-06 11:24:12,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-06 11:24:12,717 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:12,717 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:12,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-06 11:24:12,717 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:12,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:12,718 INFO L82 PathProgramCache]: Analyzing trace with hash -82343749, now seen corresponding path program 38 times [2021-05-06 11:24:12,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:12,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511419973] [2021-05-06 11:24:12,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:12,722 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:12,722 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:12,723 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:13,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:13,482 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:13,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511419973] [2021-05-06 11:24:13,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1511419973] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:13,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:13,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-06 11:24:13,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054711887] [2021-05-06 11:24:13,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-06 11:24:13,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:13,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-06 11:24:13,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 11:24:13,484 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:13,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:13,760 INFO L93 Difference]: Finished difference Result 263 states and 302 transitions. [2021-05-06 11:24:13,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-06 11:24:13,761 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2021-05-06 11:24:13,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:13,762 INFO L225 Difference]: With dead ends: 263 [2021-05-06 11:24:13,762 INFO L226 Difference]: Without dead ends: 249 [2021-05-06 11:24:13,763 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 684.5ms TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 11:24:13,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-06 11:24:13,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 99. [2021-05-06 11:24:13,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:13,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2021-05-06 11:24:13,776 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2021-05-06 11:24:13,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:13,776 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2021-05-06 11:24:13,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:13,776 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2021-05-06 11:24:13,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 11:24:13,777 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:13,777 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:13,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-06 11:24:13,777 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:13,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:13,778 INFO L82 PathProgramCache]: Analyzing trace with hash 709690589, now seen corresponding path program 39 times [2021-05-06 11:24:13,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:13,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355966778] [2021-05-06 11:24:13,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:13,782 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:13,782 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:13,783 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:14,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:14,526 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:14,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355966778] [2021-05-06 11:24:14,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1355966778] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:14,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:14,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-06 11:24:14,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837683980] [2021-05-06 11:24:14,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-06 11:24:14,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:14,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-06 11:24:14,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-06 11:24:14,528 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:14,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:14,862 INFO L93 Difference]: Finished difference Result 269 states and 309 transitions. [2021-05-06 11:24:14,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-06 11:24:14,862 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2021-05-06 11:24:14,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:14,863 INFO L225 Difference]: With dead ends: 269 [2021-05-06 11:24:14,864 INFO L226 Difference]: Without dead ends: 255 [2021-05-06 11:24:14,864 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 666.9ms TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-06 11:24:14,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-06 11:24:14,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 101. [2021-05-06 11:24:14,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:14,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-05-06 11:24:14,879 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2021-05-06 11:24:14,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:14,881 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-05-06 11:24:14,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:14,881 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-05-06 11:24:14,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 11:24:14,882 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:14,882 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:14,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-06 11:24:14,882 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:14,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:14,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1645478015, now seen corresponding path program 40 times [2021-05-06 11:24:14,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:14,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507828422] [2021-05-06 11:24:14,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:14,887 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:14,887 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:14,888 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:15,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:15,681 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:15,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507828422] [2021-05-06 11:24:15,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1507828422] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:15,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:15,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-06 11:24:15,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107916201] [2021-05-06 11:24:15,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-06 11:24:15,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:15,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-06 11:24:15,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 11:24:15,683 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:16,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:16,029 INFO L93 Difference]: Finished difference Result 275 states and 316 transitions. [2021-05-06 11:24:16,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-06 11:24:16,030 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2021-05-06 11:24:16,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:16,031 INFO L225 Difference]: With dead ends: 275 [2021-05-06 11:24:16,031 INFO L226 Difference]: Without dead ends: 261 [2021-05-06 11:24:16,032 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 727.9ms TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 11:24:16,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-05-06 11:24:16,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 103. [2021-05-06 11:24:16,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:16,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-05-06 11:24:16,045 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2021-05-06 11:24:16,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:16,046 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-05-06 11:24:16,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:16,046 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-05-06 11:24:16,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-06 11:24:16,046 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:16,046 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:16,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-06 11:24:16,046 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:16,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:16,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1005937759, now seen corresponding path program 41 times [2021-05-06 11:24:16,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:16,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012214392] [2021-05-06 11:24:16,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:16,054 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:16,054 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:16,055 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:16,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:16,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:16,855 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:16,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012214392] [2021-05-06 11:24:16,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1012214392] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:16,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:16,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-06 11:24:16,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875428980] [2021-05-06 11:24:16,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-06 11:24:16,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:16,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-06 11:24:16,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-06 11:24:16,858 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:17,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:17,211 INFO L93 Difference]: Finished difference Result 281 states and 323 transitions. [2021-05-06 11:24:17,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-06 11:24:17,211 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-06 11:24:17,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:17,212 INFO L225 Difference]: With dead ends: 281 [2021-05-06 11:24:17,212 INFO L226 Difference]: Without dead ends: 267 [2021-05-06 11:24:17,213 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 740.5ms TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-06 11:24:17,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-05-06 11:24:17,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 105. [2021-05-06 11:24:17,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:17,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2021-05-06 11:24:17,227 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2021-05-06 11:24:17,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:17,228 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2021-05-06 11:24:17,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:17,228 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2021-05-06 11:24:17,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 11:24:17,228 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:17,228 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:17,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-06 11:24:17,229 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:17,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:17,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2100890045, now seen corresponding path program 42 times [2021-05-06 11:24:17,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:17,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330181619] [2021-05-06 11:24:17,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:17,235 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:17,235 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:17,236 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:18,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:18,069 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:18,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330181619] [2021-05-06 11:24:18,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1330181619] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:18,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:18,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-06 11:24:18,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002040695] [2021-05-06 11:24:18,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-06 11:24:18,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:18,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-06 11:24:18,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 11:24:18,071 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:18,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:18,453 INFO L93 Difference]: Finished difference Result 287 states and 330 transitions. [2021-05-06 11:24:18,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-06 11:24:18,454 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2021-05-06 11:24:18,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:18,455 INFO L225 Difference]: With dead ends: 287 [2021-05-06 11:24:18,455 INFO L226 Difference]: Without dead ends: 273 [2021-05-06 11:24:18,455 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 763.8ms TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 11:24:18,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-05-06 11:24:18,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 107. [2021-05-06 11:24:18,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:18,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2021-05-06 11:24:18,470 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2021-05-06 11:24:18,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:18,471 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2021-05-06 11:24:18,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:18,471 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2021-05-06 11:24:18,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-06 11:24:18,471 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:18,471 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:18,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-06 11:24:18,471 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:18,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:18,472 INFO L82 PathProgramCache]: Analyzing trace with hash -2083049371, now seen corresponding path program 43 times [2021-05-06 11:24:18,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:18,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620662676] [2021-05-06 11:24:18,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:18,476 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:18,477 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:18,477 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:19,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:19,410 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:19,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620662676] [2021-05-06 11:24:19,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [620662676] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:19,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:19,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-06 11:24:19,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936872328] [2021-05-06 11:24:19,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-06 11:24:19,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:19,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-06 11:24:19,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-06 11:24:19,412 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:19,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:19,800 INFO L93 Difference]: Finished difference Result 293 states and 337 transitions. [2021-05-06 11:24:19,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-06 11:24:19,801 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2021-05-06 11:24:19,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:19,802 INFO L225 Difference]: With dead ends: 293 [2021-05-06 11:24:19,802 INFO L226 Difference]: Without dead ends: 279 [2021-05-06 11:24:19,802 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 863.5ms TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-06 11:24:19,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-05-06 11:24:19,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 109. [2021-05-06 11:24:19,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:19,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-05-06 11:24:19,817 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2021-05-06 11:24:19,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:19,817 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-05-06 11:24:19,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:19,817 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-05-06 11:24:19,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-06 11:24:19,817 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:19,817 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:19,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-06 11:24:19,818 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:19,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:19,818 INFO L82 PathProgramCache]: Analyzing trace with hash -2118030841, now seen corresponding path program 44 times [2021-05-06 11:24:19,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:19,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54789453] [2021-05-06 11:24:19,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:19,826 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:19,826 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:19,827 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:20,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:20,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:20,826 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:20,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54789453] [2021-05-06 11:24:20,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [54789453] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:20,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:20,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-06 11:24:20,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551314670] [2021-05-06 11:24:20,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-06 11:24:20,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:20,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-06 11:24:20,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-06 11:24:20,827 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:21,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:21,183 INFO L93 Difference]: Finished difference Result 299 states and 344 transitions. [2021-05-06 11:24:21,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-06 11:24:21,184 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2021-05-06 11:24:21,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:21,185 INFO L225 Difference]: With dead ends: 299 [2021-05-06 11:24:21,185 INFO L226 Difference]: Without dead ends: 285 [2021-05-06 11:24:21,185 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 938.5ms TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-06 11:24:21,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-05-06 11:24:21,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 111. [2021-05-06 11:24:21,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:21,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2021-05-06 11:24:21,201 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2021-05-06 11:24:21,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:21,202 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2021-05-06 11:24:21,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2021-05-06 11:24:21,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-06 11:24:21,202 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:21,203 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:21,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-06 11:24:21,203 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:21,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:21,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1375485143, now seen corresponding path program 45 times [2021-05-06 11:24:21,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:21,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261460706] [2021-05-06 11:24:21,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:21,211 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:21,211 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:21,212 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:22,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:22,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:22,137 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:22,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261460706] [2021-05-06 11:24:22,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [261460706] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:22,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:22,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-06 11:24:22,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110778188] [2021-05-06 11:24:22,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-06 11:24:22,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:22,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-06 11:24:22,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-06 11:24:22,139 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:22,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:22,533 INFO L93 Difference]: Finished difference Result 305 states and 351 transitions. [2021-05-06 11:24:22,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-06 11:24:22,533 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2021-05-06 11:24:22,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:22,534 INFO L225 Difference]: With dead ends: 305 [2021-05-06 11:24:22,534 INFO L226 Difference]: Without dead ends: 291 [2021-05-06 11:24:22,535 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 856.6ms TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-06 11:24:22,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-05-06 11:24:22,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 113. [2021-05-06 11:24:22,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:22,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2021-05-06 11:24:22,552 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2021-05-06 11:24:22,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:22,552 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2021-05-06 11:24:22,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:22,552 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2021-05-06 11:24:22,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-06 11:24:22,553 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:22,553 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:22,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-06 11:24:22,553 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:22,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:22,553 INFO L82 PathProgramCache]: Analyzing trace with hash -753640501, now seen corresponding path program 46 times [2021-05-06 11:24:22,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:22,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406965299] [2021-05-06 11:24:22,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:22,557 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:22,557 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:22,558 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:23,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:23,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:23,550 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:23,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406965299] [2021-05-06 11:24:23,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1406965299] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:23,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:23,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-06 11:24:23,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372951087] [2021-05-06 11:24:23,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-06 11:24:23,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:23,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-06 11:24:23,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-06 11:24:23,551 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:23,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:23,946 INFO L93 Difference]: Finished difference Result 311 states and 358 transitions. [2021-05-06 11:24:23,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-06 11:24:23,947 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2021-05-06 11:24:23,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:23,948 INFO L225 Difference]: With dead ends: 311 [2021-05-06 11:24:23,948 INFO L226 Difference]: Without dead ends: 297 [2021-05-06 11:24:23,948 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 932.6ms TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-06 11:24:23,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-05-06 11:24:23,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 115. [2021-05-06 11:24:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:23,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2021-05-06 11:24:23,967 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2021-05-06 11:24:23,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:23,967 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2021-05-06 11:24:23,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:23,967 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2021-05-06 11:24:23,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-06 11:24:23,968 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:23,968 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:23,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-06 11:24:23,968 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:23,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:23,968 INFO L82 PathProgramCache]: Analyzing trace with hash -161393683, now seen corresponding path program 47 times [2021-05-06 11:24:23,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:23,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643754750] [2021-05-06 11:24:23,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:23,973 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:23,973 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:23,974 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:25,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:25,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:25,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:25,025 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:25,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643754750] [2021-05-06 11:24:25,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [643754750] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:25,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:25,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-06 11:24:25,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812317717] [2021-05-06 11:24:25,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-06 11:24:25,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:25,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-06 11:24:25,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-06 11:24:25,027 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:25,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:25,504 INFO L93 Difference]: Finished difference Result 317 states and 365 transitions. [2021-05-06 11:24:25,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-06 11:24:25,504 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2021-05-06 11:24:25,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:25,506 INFO L225 Difference]: With dead ends: 317 [2021-05-06 11:24:25,506 INFO L226 Difference]: Without dead ends: 303 [2021-05-06 11:24:25,506 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 992.0ms TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-06 11:24:25,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-05-06 11:24:25,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 117. [2021-05-06 11:24:25,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:25,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-05-06 11:24:25,529 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2021-05-06 11:24:25,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:25,529 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-05-06 11:24:25,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:25,530 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-05-06 11:24:25,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 11:24:25,530 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:25,530 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:25,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-06 11:24:25,531 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:25,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:25,531 INFO L82 PathProgramCache]: Analyzing trace with hash 2052115343, now seen corresponding path program 48 times [2021-05-06 11:24:25,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:25,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420602564] [2021-05-06 11:24:25,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:25,535 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:25,535 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:25,536 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:26,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:26,629 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:26,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420602564] [2021-05-06 11:24:26,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [420602564] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:26,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:26,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-06 11:24:26,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684692465] [2021-05-06 11:24:26,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-06 11:24:26,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:26,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-06 11:24:26,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 11:24:26,631 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:27,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:27,007 INFO L93 Difference]: Finished difference Result 323 states and 372 transitions. [2021-05-06 11:24:27,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-06 11:24:27,007 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2021-05-06 11:24:27,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:27,008 INFO L225 Difference]: With dead ends: 323 [2021-05-06 11:24:27,008 INFO L226 Difference]: Without dead ends: 309 [2021-05-06 11:24:27,009 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1020.8ms TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 11:24:27,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-05-06 11:24:27,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 119. [2021-05-06 11:24:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:27,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2021-05-06 11:24:27,028 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2021-05-06 11:24:27,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:27,028 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2021-05-06 11:24:27,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:27,029 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2021-05-06 11:24:27,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-06 11:24:27,029 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:27,029 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:27,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-06 11:24:27,029 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:27,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:27,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1069489487, now seen corresponding path program 49 times [2021-05-06 11:24:27,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:27,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785598109] [2021-05-06 11:24:27,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:27,034 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:27,034 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:27,034 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:28,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:28,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:28,117 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:28,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785598109] [2021-05-06 11:24:28,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1785598109] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:28,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:28,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-06 11:24:28,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475034990] [2021-05-06 11:24:28,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-06 11:24:28,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:28,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-06 11:24:28,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-06 11:24:28,118 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:28,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:28,578 INFO L93 Difference]: Finished difference Result 329 states and 379 transitions. [2021-05-06 11:24:28,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-06 11:24:28,578 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2021-05-06 11:24:28,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:28,580 INFO L225 Difference]: With dead ends: 329 [2021-05-06 11:24:28,580 INFO L226 Difference]: Without dead ends: 315 [2021-05-06 11:24:28,580 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1019.1ms TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-06 11:24:28,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-05-06 11:24:28,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 121. [2021-05-06 11:24:28,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:28,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2021-05-06 11:24:28,600 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2021-05-06 11:24:28,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:28,600 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2021-05-06 11:24:28,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:28,601 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2021-05-06 11:24:28,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-06 11:24:28,601 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:28,601 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:28,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-06 11:24:28,601 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:28,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:28,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1250408787, now seen corresponding path program 50 times [2021-05-06 11:24:28,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:28,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510817058] [2021-05-06 11:24:28,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:28,606 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:28,606 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:28,606 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:29,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:29,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:29,719 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:29,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510817058] [2021-05-06 11:24:29,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1510817058] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:29,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:29,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-06 11:24:29,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930636765] [2021-05-06 11:24:29,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-06 11:24:29,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:29,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-06 11:24:29,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 11:24:29,721 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:30,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:30,189 INFO L93 Difference]: Finished difference Result 335 states and 386 transitions. [2021-05-06 11:24:30,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-06 11:24:30,190 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2021-05-06 11:24:30,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:30,191 INFO L225 Difference]: With dead ends: 335 [2021-05-06 11:24:30,191 INFO L226 Difference]: Without dead ends: 321 [2021-05-06 11:24:30,192 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1047.6ms TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 11:24:30,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-05-06 11:24:30,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 123. [2021-05-06 11:24:30,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:30,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2021-05-06 11:24:30,212 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2021-05-06 11:24:30,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:30,213 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2021-05-06 11:24:30,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:30,213 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2021-05-06 11:24:30,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 11:24:30,213 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:30,214 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:30,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-06 11:24:30,214 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:30,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:30,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1584623477, now seen corresponding path program 51 times [2021-05-06 11:24:30,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:30,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910736851] [2021-05-06 11:24:30,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:30,218 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:30,218 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:30,219 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:31,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:31,426 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:31,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910736851] [2021-05-06 11:24:31,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1910736851] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:31,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:31,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-06 11:24:31,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136900710] [2021-05-06 11:24:31,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-06 11:24:31,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:31,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-06 11:24:31,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-06 11:24:31,428 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:31,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:31,878 INFO L93 Difference]: Finished difference Result 341 states and 393 transitions. [2021-05-06 11:24:31,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-06 11:24:31,879 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2021-05-06 11:24:31,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:31,880 INFO L225 Difference]: With dead ends: 341 [2021-05-06 11:24:31,880 INFO L226 Difference]: Without dead ends: 327 [2021-05-06 11:24:31,881 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1143.3ms TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-06 11:24:31,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-05-06 11:24:31,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 125. [2021-05-06 11:24:31,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:31,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-05-06 11:24:31,902 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2021-05-06 11:24:31,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:31,902 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-05-06 11:24:31,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:31,903 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-05-06 11:24:31,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-06 11:24:31,903 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:31,903 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:31,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-06 11:24:31,903 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:31,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:31,904 INFO L82 PathProgramCache]: Analyzing trace with hash 642393367, now seen corresponding path program 52 times [2021-05-06 11:24:31,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:31,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763445078] [2021-05-06 11:24:31,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:31,908 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:31,908 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:31,909 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:33,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:33,107 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:33,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763445078] [2021-05-06 11:24:33,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [763445078] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:33,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:33,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-06 11:24:33,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959832016] [2021-05-06 11:24:33,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-06 11:24:33,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:33,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-06 11:24:33,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 11:24:33,109 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:33,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:33,582 INFO L93 Difference]: Finished difference Result 347 states and 400 transitions. [2021-05-06 11:24:33,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-06 11:24:33,582 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2021-05-06 11:24:33,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:33,583 INFO L225 Difference]: With dead ends: 347 [2021-05-06 11:24:33,583 INFO L226 Difference]: Without dead ends: 333 [2021-05-06 11:24:33,583 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1135.5ms TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 11:24:33,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-05-06 11:24:33,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 127. [2021-05-06 11:24:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2021-05-06 11:24:33,599 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2021-05-06 11:24:33,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:33,599 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2021-05-06 11:24:33,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2021-05-06 11:24:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-05-06 11:24:33,600 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:33,600 INFO L523 BasicCegarLoop]: trace histogram [53, 53, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:33,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-06 11:24:33,600 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:33,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:33,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1397357113, now seen corresponding path program 53 times [2021-05-06 11:24:33,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:33,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726483103] [2021-05-06 11:24:33,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:33,612 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:33,613 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:33,613 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:34,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:34,836 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:34,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726483103] [2021-05-06 11:24:34,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [726483103] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:34,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:34,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-06 11:24:34,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515182573] [2021-05-06 11:24:34,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-06 11:24:34,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:34,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-06 11:24:34,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-06 11:24:34,838 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:35,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:35,250 INFO L93 Difference]: Finished difference Result 353 states and 407 transitions. [2021-05-06 11:24:35,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-06 11:24:35,255 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2021-05-06 11:24:35,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:35,256 INFO L225 Difference]: With dead ends: 353 [2021-05-06 11:24:35,256 INFO L226 Difference]: Without dead ends: 339 [2021-05-06 11:24:35,257 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1160.7ms TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-06 11:24:35,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-06 11:24:35,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 129. [2021-05-06 11:24:35,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:35,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2021-05-06 11:24:35,280 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2021-05-06 11:24:35,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:35,281 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2021-05-06 11:24:35,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:35,281 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2021-05-06 11:24:35,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-06 11:24:35,281 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:35,281 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:35,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-06 11:24:35,282 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:35,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:35,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1068043995, now seen corresponding path program 54 times [2021-05-06 11:24:35,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:35,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170664105] [2021-05-06 11:24:35,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:35,286 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:35,286 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:35,287 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:36,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:36,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:36,571 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:36,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170664105] [2021-05-06 11:24:36,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [170664105] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:36,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:36,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-06 11:24:36,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589770823] [2021-05-06 11:24:36,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-06 11:24:36,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:36,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-06 11:24:36,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 11:24:36,573 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:36,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:36,990 INFO L93 Difference]: Finished difference Result 359 states and 414 transitions. [2021-05-06 11:24:36,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-06 11:24:36,991 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2021-05-06 11:24:36,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:36,992 INFO L225 Difference]: With dead ends: 359 [2021-05-06 11:24:36,992 INFO L226 Difference]: Without dead ends: 345 [2021-05-06 11:24:36,992 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1210.3ms TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 11:24:36,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-06 11:24:37,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 131. [2021-05-06 11:24:37,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:37,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2021-05-06 11:24:37,015 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2021-05-06 11:24:37,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:37,015 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2021-05-06 11:24:37,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:37,015 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2021-05-06 11:24:37,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-06 11:24:37,016 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:37,016 INFO L523 BasicCegarLoop]: trace histogram [55, 55, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:37,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-06 11:24:37,016 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:37,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:37,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1869249795, now seen corresponding path program 55 times [2021-05-06 11:24:37,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:37,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362395815] [2021-05-06 11:24:37,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:37,020 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:37,021 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:37,021 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:38,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:38,395 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:38,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362395815] [2021-05-06 11:24:38,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [362395815] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:38,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:38,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-06 11:24:38,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127818145] [2021-05-06 11:24:38,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-06 11:24:38,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:38,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-06 11:24:38,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-06 11:24:38,396 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:38,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:38,871 INFO L93 Difference]: Finished difference Result 365 states and 421 transitions. [2021-05-06 11:24:38,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-06 11:24:38,875 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2021-05-06 11:24:38,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:38,876 INFO L225 Difference]: With dead ends: 365 [2021-05-06 11:24:38,876 INFO L226 Difference]: Without dead ends: 351 [2021-05-06 11:24:38,876 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1302.7ms TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-06 11:24:38,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-05-06 11:24:38,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 133. [2021-05-06 11:24:38,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:38,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2021-05-06 11:24:38,894 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2021-05-06 11:24:38,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:38,894 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2021-05-06 11:24:38,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:38,894 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2021-05-06 11:24:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 11:24:38,895 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:38,895 INFO L523 BasicCegarLoop]: trace histogram [56, 56, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:38,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-06 11:24:38,895 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:38,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:38,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1479898783, now seen corresponding path program 56 times [2021-05-06 11:24:38,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:38,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825214564] [2021-05-06 11:24:38,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:38,900 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:38,900 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:38,900 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:38,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:40,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:40,339 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:40,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825214564] [2021-05-06 11:24:40,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1825214564] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:40,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:40,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-06 11:24:40,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631779878] [2021-05-06 11:24:40,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-06 11:24:40,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:40,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-06 11:24:40,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-06 11:24:40,340 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:40,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:40,916 INFO L93 Difference]: Finished difference Result 371 states and 428 transitions. [2021-05-06 11:24:40,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-06 11:24:40,916 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 132 [2021-05-06 11:24:40,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:40,919 INFO L225 Difference]: With dead ends: 371 [2021-05-06 11:24:40,919 INFO L226 Difference]: Without dead ends: 357 [2021-05-06 11:24:40,919 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1368.5ms TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-06 11:24:40,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-05-06 11:24:40,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 135. [2021-05-06 11:24:40,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:40,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2021-05-06 11:24:40,937 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2021-05-06 11:24:40,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:40,937 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2021-05-06 11:24:40,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:40,937 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2021-05-06 11:24:40,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-06 11:24:40,938 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:40,938 INFO L523 BasicCegarLoop]: trace histogram [57, 57, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:40,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-06 11:24:40,938 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:40,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:40,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1213789759, now seen corresponding path program 57 times [2021-05-06 11:24:40,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:40,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252150534] [2021-05-06 11:24:40,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:40,941 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:40,941 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:40,942 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:40,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:42,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:42,335 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:42,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252150534] [2021-05-06 11:24:42,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [252150534] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:42,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:42,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-06 11:24:42,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794404299] [2021-05-06 11:24:42,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-06 11:24:42,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:42,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-06 11:24:42,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-06 11:24:42,337 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:42,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:42,825 INFO L93 Difference]: Finished difference Result 377 states and 435 transitions. [2021-05-06 11:24:42,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-06 11:24:42,825 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2021-05-06 11:24:42,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:42,826 INFO L225 Difference]: With dead ends: 377 [2021-05-06 11:24:42,826 INFO L226 Difference]: Without dead ends: 363 [2021-05-06 11:24:42,827 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1327.7ms TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-06 11:24:42,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-05-06 11:24:42,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 137. [2021-05-06 11:24:42,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:42,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2021-05-06 11:24:42,846 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2021-05-06 11:24:42,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:42,846 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2021-05-06 11:24:42,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:42,846 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2021-05-06 11:24:42,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-05-06 11:24:42,847 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:42,847 INFO L523 BasicCegarLoop]: trace histogram [58, 58, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:42,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-06 11:24:42,847 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:42,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:42,847 INFO L82 PathProgramCache]: Analyzing trace with hash 16800867, now seen corresponding path program 58 times [2021-05-06 11:24:42,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:42,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713445733] [2021-05-06 11:24:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:42,862 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:42,863 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:42,863 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:44,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:44,311 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:44,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713445733] [2021-05-06 11:24:44,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1713445733] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:44,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:44,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-06 11:24:44,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316493480] [2021-05-06 11:24:44,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-06 11:24:44,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:44,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-06 11:24:44,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 11:24:44,313 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:44,904 INFO L93 Difference]: Finished difference Result 383 states and 442 transitions. [2021-05-06 11:24:44,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-06 11:24:44,905 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2021-05-06 11:24:44,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:44,906 INFO L225 Difference]: With dead ends: 383 [2021-05-06 11:24:44,906 INFO L226 Difference]: Without dead ends: 369 [2021-05-06 11:24:44,907 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1381.5ms TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 11:24:44,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-06 11:24:44,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 139. [2021-05-06 11:24:44,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:44,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2021-05-06 11:24:44,927 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2021-05-06 11:24:44,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:44,927 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2021-05-06 11:24:44,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:44,927 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2021-05-06 11:24:44,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-06 11:24:44,928 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:44,928 INFO L523 BasicCegarLoop]: trace histogram [59, 59, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:44,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-06 11:24:44,928 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:44,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:44,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1498386053, now seen corresponding path program 59 times [2021-05-06 11:24:44,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:44,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995588214] [2021-05-06 11:24:44,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:44,931 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:44,932 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:44,932 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:46,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:46,461 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:46,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995588214] [2021-05-06 11:24:46,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [995588214] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:46,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:46,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-06 11:24:46,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805885961] [2021-05-06 11:24:46,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-06 11:24:46,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:46,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-06 11:24:46,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-06 11:24:46,463 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:46,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:46,989 INFO L93 Difference]: Finished difference Result 389 states and 449 transitions. [2021-05-06 11:24:46,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-06 11:24:46,989 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2021-05-06 11:24:46,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:46,990 INFO L225 Difference]: With dead ends: 389 [2021-05-06 11:24:46,990 INFO L226 Difference]: Without dead ends: 375 [2021-05-06 11:24:46,991 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1437.4ms TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-06 11:24:46,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-05-06 11:24:47,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 141. [2021-05-06 11:24:47,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:47,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2021-05-06 11:24:47,011 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2021-05-06 11:24:47,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:47,011 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2021-05-06 11:24:47,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:47,011 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2021-05-06 11:24:47,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-06 11:24:47,011 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:47,012 INFO L523 BasicCegarLoop]: trace histogram [60, 60, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:47,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-06 11:24:47,012 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:47,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:47,012 INFO L82 PathProgramCache]: Analyzing trace with hash -627392473, now seen corresponding path program 60 times [2021-05-06 11:24:47,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:47,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071812521] [2021-05-06 11:24:47,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:47,016 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:47,016 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:47,017 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:48,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:48,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:48,600 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:48,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071812521] [2021-05-06 11:24:48,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1071812521] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:48,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:48,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-06 11:24:48,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263171929] [2021-05-06 11:24:48,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-06 11:24:48,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:48,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-06 11:24:48,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 11:24:48,603 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:49,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:49,144 INFO L93 Difference]: Finished difference Result 395 states and 456 transitions. [2021-05-06 11:24:49,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-06 11:24:49,144 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2021-05-06 11:24:49,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:49,146 INFO L225 Difference]: With dead ends: 395 [2021-05-06 11:24:49,146 INFO L226 Difference]: Without dead ends: 381 [2021-05-06 11:24:49,146 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1507.8ms TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 11:24:49,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-05-06 11:24:49,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 143. [2021-05-06 11:24:49,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 138 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:49,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2021-05-06 11:24:49,175 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2021-05-06 11:24:49,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:49,175 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2021-05-06 11:24:49,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:49,175 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2021-05-06 11:24:49,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-05-06 11:24:49,176 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:49,176 INFO L523 BasicCegarLoop]: trace histogram [61, 61, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:49,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-06 11:24:49,176 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:49,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:49,177 INFO L82 PathProgramCache]: Analyzing trace with hash 903876937, now seen corresponding path program 61 times [2021-05-06 11:24:49,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:49,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234663805] [2021-05-06 11:24:49,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:49,180 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:49,180 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:49,181 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:50,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:50,791 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:50,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234663805] [2021-05-06 11:24:50,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [234663805] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:50,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:50,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-06 11:24:50,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27694030] [2021-05-06 11:24:50,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-06 11:24:50,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:50,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-06 11:24:50,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-05-06 11:24:50,793 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:51,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:51,445 INFO L93 Difference]: Finished difference Result 401 states and 463 transitions. [2021-05-06 11:24:51,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-06 11:24:51,445 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2021-05-06 11:24:51,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:51,446 INFO L225 Difference]: With dead ends: 401 [2021-05-06 11:24:51,446 INFO L226 Difference]: Without dead ends: 387 [2021-05-06 11:24:51,447 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1534.0ms TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-05-06 11:24:51,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-05-06 11:24:51,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 145. [2021-05-06 11:24:51,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:51,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2021-05-06 11:24:51,479 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2021-05-06 11:24:51,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:51,479 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2021-05-06 11:24:51,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:51,479 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2021-05-06 11:24:51,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-05-06 11:24:51,480 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:51,480 INFO L523 BasicCegarLoop]: trace histogram [62, 62, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:51,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-06 11:24:51,480 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:51,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:51,481 INFO L82 PathProgramCache]: Analyzing trace with hash -720002581, now seen corresponding path program 62 times [2021-05-06 11:24:51,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:51,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431018993] [2021-05-06 11:24:51,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:51,488 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:51,488 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:51,489 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:53,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:53,115 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:53,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431018993] [2021-05-06 11:24:53,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1431018993] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:53,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:53,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-06 11:24:53,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855723767] [2021-05-06 11:24:53,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-06 11:24:53,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:53,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-06 11:24:53,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-06 11:24:53,116 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:53,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:53,697 INFO L93 Difference]: Finished difference Result 407 states and 470 transitions. [2021-05-06 11:24:53,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-06 11:24:53,697 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2021-05-06 11:24:53,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:53,698 INFO L225 Difference]: With dead ends: 407 [2021-05-06 11:24:53,698 INFO L226 Difference]: Without dead ends: 393 [2021-05-06 11:24:53,699 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1551.9ms TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-06 11:24:53,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-05-06 11:24:53,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 147. [2021-05-06 11:24:53,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:53,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2021-05-06 11:24:53,732 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2021-05-06 11:24:53,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:53,732 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2021-05-06 11:24:53,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:53,732 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2021-05-06 11:24:53,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-06 11:24:53,733 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:53,733 INFO L523 BasicCegarLoop]: trace histogram [63, 63, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:53,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-06 11:24:53,733 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:53,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:53,733 INFO L82 PathProgramCache]: Analyzing trace with hash 2099876365, now seen corresponding path program 63 times [2021-05-06 11:24:53,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:53,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519998781] [2021-05-06 11:24:53,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:53,748 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:53,748 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:53,748 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:55,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:55,458 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:55,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519998781] [2021-05-06 11:24:55,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1519998781] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:55,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:55,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-06 11:24:55,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41564642] [2021-05-06 11:24:55,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-06 11:24:55,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:55,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-06 11:24:55,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-06 11:24:55,460 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:56,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:56,003 INFO L93 Difference]: Finished difference Result 413 states and 477 transitions. [2021-05-06 11:24:56,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-06 11:24:56,004 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2021-05-06 11:24:56,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:56,005 INFO L225 Difference]: With dead ends: 413 [2021-05-06 11:24:56,005 INFO L226 Difference]: Without dead ends: 399 [2021-05-06 11:24:56,005 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1639.7ms TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-06 11:24:56,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-05-06 11:24:56,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 149. [2021-05-06 11:24:56,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:56,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2021-05-06 11:24:56,048 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2021-05-06 11:24:56,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:56,049 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2021-05-06 11:24:56,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:56,049 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2021-05-06 11:24:56,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-05-06 11:24:56,049 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:56,050 INFO L523 BasicCegarLoop]: trace histogram [64, 64, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:56,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-06 11:24:56,050 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:56,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:56,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1879179695, now seen corresponding path program 64 times [2021-05-06 11:24:56,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:56,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657042450] [2021-05-06 11:24:56,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:56,054 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:56,054 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:56,055 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:57,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:57,768 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:57,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657042450] [2021-05-06 11:24:57,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1657042450] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:57,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:57,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-06 11:24:57,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672398463] [2021-05-06 11:24:57,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-06 11:24:57,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:57,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-06 11:24:57,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-06 11:24:57,770 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:58,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:58,504 INFO L93 Difference]: Finished difference Result 419 states and 484 transitions. [2021-05-06 11:24:58,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-06 11:24:58,505 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 148 [2021-05-06 11:24:58,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:58,506 INFO L225 Difference]: With dead ends: 419 [2021-05-06 11:24:58,506 INFO L226 Difference]: Without dead ends: 405 [2021-05-06 11:24:58,506 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1635.4ms TimeCoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-06 11:24:58,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-05-06 11:24:58,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 151. [2021-05-06 11:24:58,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:58,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2021-05-06 11:24:58,543 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2021-05-06 11:24:58,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:58,543 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2021-05-06 11:24:58,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:58,544 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2021-05-06 11:24:58,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-06 11:24:58,544 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:58,544 INFO L523 BasicCegarLoop]: trace histogram [65, 65, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:58,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-06 11:24:58,544 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:58,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:58,545 INFO L82 PathProgramCache]: Analyzing trace with hash 243077329, now seen corresponding path program 65 times [2021-05-06 11:24:58,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:58,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364938440] [2021-05-06 11:24:58,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:58,549 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:58,549 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:58,549 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:00,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:00,348 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:00,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364938440] [2021-05-06 11:25:00,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [364938440] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:00,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:00,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-06 11:25:00,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853732842] [2021-05-06 11:25:00,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-06 11:25:00,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:00,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-06 11:25:00,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2021-05-06 11:25:00,349 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:00,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:00,991 INFO L93 Difference]: Finished difference Result 425 states and 491 transitions. [2021-05-06 11:25:00,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-06 11:25:00,991 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2021-05-06 11:25:00,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:00,992 INFO L225 Difference]: With dead ends: 425 [2021-05-06 11:25:00,992 INFO L226 Difference]: Without dead ends: 411 [2021-05-06 11:25:00,993 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1718.1ms TimeCoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2021-05-06 11:25:00,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-05-06 11:25:01,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 153. [2021-05-06 11:25:01,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:01,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2021-05-06 11:25:01,022 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2021-05-06 11:25:01,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:01,022 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2021-05-06 11:25:01,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:01,022 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2021-05-06 11:25:01,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-05-06 11:25:01,023 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:01,023 INFO L523 BasicCegarLoop]: trace histogram [66, 66, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:01,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-06 11:25:01,023 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:01,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:01,024 INFO L82 PathProgramCache]: Analyzing trace with hash -93266061, now seen corresponding path program 66 times [2021-05-06 11:25:01,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:01,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651686610] [2021-05-06 11:25:01,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:01,039 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:01,039 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:01,040 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:02,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:02,866 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:02,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651686610] [2021-05-06 11:25:02,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [651686610] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:02,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:02,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2021-05-06 11:25:02,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356684036] [2021-05-06 11:25:02,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-06 11:25:02,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:02,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-06 11:25:02,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-06 11:25:02,868 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:03,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:03,674 INFO L93 Difference]: Finished difference Result 431 states and 498 transitions. [2021-05-06 11:25:03,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-06 11:25:03,674 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2021-05-06 11:25:03,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:03,675 INFO L225 Difference]: With dead ends: 431 [2021-05-06 11:25:03,676 INFO L226 Difference]: Without dead ends: 417 [2021-05-06 11:25:03,676 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1752.1ms TimeCoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-06 11:25:03,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-05-06 11:25:03,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 155. [2021-05-06 11:25:03,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0133333333333334) internal successors, (152), 150 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:03,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2021-05-06 11:25:03,714 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2021-05-06 11:25:03,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:03,714 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2021-05-06 11:25:03,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:03,715 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2021-05-06 11:25:03,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-06 11:25:03,715 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:03,715 INFO L523 BasicCegarLoop]: trace histogram [67, 67, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:03,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-06 11:25:03,715 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:03,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:03,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1196716651, now seen corresponding path program 67 times [2021-05-06 11:25:03,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:03,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938189270] [2021-05-06 11:25:03,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:03,719 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:03,719 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:03,719 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:05,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:05,596 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:05,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938189270] [2021-05-06 11:25:05,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1938189270] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:05,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:05,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-06 11:25:05,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081283468] [2021-05-06 11:25:05,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-06 11:25:05,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:05,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-06 11:25:05,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-06 11:25:05,597 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:06,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:06,283 INFO L93 Difference]: Finished difference Result 437 states and 505 transitions. [2021-05-06 11:25:06,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-06 11:25:06,283 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2021-05-06 11:25:06,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:06,284 INFO L225 Difference]: With dead ends: 437 [2021-05-06 11:25:06,284 INFO L226 Difference]: Without dead ends: 423 [2021-05-06 11:25:06,285 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1806.2ms TimeCoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-06 11:25:06,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-06 11:25:06,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 157. [2021-05-06 11:25:06,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:06,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2021-05-06 11:25:06,312 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2021-05-06 11:25:06,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:06,313 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2021-05-06 11:25:06,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:06,313 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2021-05-06 11:25:06,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-06 11:25:06,313 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:06,313 INFO L523 BasicCegarLoop]: trace histogram [68, 68, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:06,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-06 11:25:06,313 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:06,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:06,314 INFO L82 PathProgramCache]: Analyzing trace with hash -755811529, now seen corresponding path program 68 times [2021-05-06 11:25:06,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:06,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035266700] [2021-05-06 11:25:06,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:06,317 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:06,317 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:06,318 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:08,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:08,289 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:08,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035266700] [2021-05-06 11:25:08,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1035266700] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:08,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:08,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2021-05-06 11:25:08,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182820862] [2021-05-06 11:25:08,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-06 11:25:08,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:08,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-06 11:25:08,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2021-05-06 11:25:08,290 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:08,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:08,920 INFO L93 Difference]: Finished difference Result 443 states and 512 transitions. [2021-05-06 11:25:08,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-06 11:25:08,920 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 156 [2021-05-06 11:25:08,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:08,921 INFO L225 Difference]: With dead ends: 443 [2021-05-06 11:25:08,921 INFO L226 Difference]: Without dead ends: 429 [2021-05-06 11:25:08,922 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1886.9ms TimeCoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2021-05-06 11:25:08,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-05-06 11:25:08,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 159. [2021-05-06 11:25:08,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:08,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2021-05-06 11:25:08,962 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2021-05-06 11:25:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:08,963 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2021-05-06 11:25:08,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:08,963 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2021-05-06 11:25:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-05-06 11:25:08,963 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:08,963 INFO L523 BasicCegarLoop]: trace histogram [69, 69, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:08,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-06 11:25:08,964 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:08,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:08,964 INFO L82 PathProgramCache]: Analyzing trace with hash 2047215705, now seen corresponding path program 69 times [2021-05-06 11:25:08,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:08,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285260942] [2021-05-06 11:25:08,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:08,968 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:08,968 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:08,969 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:10,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:10,942 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:10,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285260942] [2021-05-06 11:25:10,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [285260942] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:10,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:10,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2021-05-06 11:25:10,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720005219] [2021-05-06 11:25:10,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-06 11:25:10,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:10,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-06 11:25:10,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-06 11:25:10,943 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:11,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:11,572 INFO L93 Difference]: Finished difference Result 449 states and 519 transitions. [2021-05-06 11:25:11,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-06 11:25:11,573 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2021-05-06 11:25:11,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:11,575 INFO L225 Difference]: With dead ends: 449 [2021-05-06 11:25:11,575 INFO L226 Difference]: Without dead ends: 435 [2021-05-06 11:25:11,575 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1897.2ms TimeCoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-06 11:25:11,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-05-06 11:25:11,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 161. [2021-05-06 11:25:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2021-05-06 11:25:11,619 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2021-05-06 11:25:11,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:11,619 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2021-05-06 11:25:11,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2021-05-06 11:25:11,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-06 11:25:11,620 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:11,620 INFO L523 BasicCegarLoop]: trace histogram [70, 70, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:11,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-06 11:25:11,621 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:11,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:11,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1483074309, now seen corresponding path program 70 times [2021-05-06 11:25:11,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:11,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134592593] [2021-05-06 11:25:11,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:11,625 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:11,625 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:11,626 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:13,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:13,646 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:13,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134592593] [2021-05-06 11:25:13,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2134592593] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:13,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:13,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2021-05-06 11:25:13,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959084673] [2021-05-06 11:25:13,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-06 11:25:13,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:13,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-06 11:25:13,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-06 11:25:13,647 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:14,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:14,336 INFO L93 Difference]: Finished difference Result 455 states and 526 transitions. [2021-05-06 11:25:14,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-06 11:25:14,336 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2021-05-06 11:25:14,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:14,337 INFO L225 Difference]: With dead ends: 455 [2021-05-06 11:25:14,337 INFO L226 Difference]: Without dead ends: 441 [2021-05-06 11:25:14,338 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1939.9ms TimeCoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-06 11:25:14,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-05-06 11:25:14,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 163. [2021-05-06 11:25:14,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2021-05-06 11:25:14,371 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2021-05-06 11:25:14,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:14,371 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2021-05-06 11:25:14,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:14,372 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2021-05-06 11:25:14,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-06 11:25:14,372 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:14,372 INFO L523 BasicCegarLoop]: trace histogram [71, 71, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:14,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-06 11:25:14,373 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:14,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:14,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1067613923, now seen corresponding path program 71 times [2021-05-06 11:25:14,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:14,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089534252] [2021-05-06 11:25:14,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:14,391 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:14,391 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:14,392 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:16,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:16,469 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:16,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089534252] [2021-05-06 11:25:16,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1089534252] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:16,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:16,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2021-05-06 11:25:16,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575056192] [2021-05-06 11:25:16,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-06 11:25:16,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:16,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-06 11:25:16,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2021-05-06 11:25:16,471 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:17,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:17,416 INFO L93 Difference]: Finished difference Result 461 states and 533 transitions. [2021-05-06 11:25:17,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-06 11:25:17,416 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 162 [2021-05-06 11:25:17,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:17,417 INFO L225 Difference]: With dead ends: 461 [2021-05-06 11:25:17,417 INFO L226 Difference]: Without dead ends: 447 [2021-05-06 11:25:17,418 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2001.4ms TimeCoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2021-05-06 11:25:17,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-05-06 11:25:17,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 165. [2021-05-06 11:25:17,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:17,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2021-05-06 11:25:17,450 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2021-05-06 11:25:17,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:17,450 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2021-05-06 11:25:17,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:17,450 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2021-05-06 11:25:17,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-05-06 11:25:17,450 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:17,450 INFO L523 BasicCegarLoop]: trace histogram [72, 72, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:17,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-06 11:25:17,451 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:17,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:17,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1242141505, now seen corresponding path program 72 times [2021-05-06 11:25:17,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:17,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132555008] [2021-05-06 11:25:17,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:17,464 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:17,464 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:17,465 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:19,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:19,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:19,642 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:19,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132555008] [2021-05-06 11:25:19,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2132555008] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:19,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:19,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-06 11:25:19,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637783785] [2021-05-06 11:25:19,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-06 11:25:19,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:19,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-06 11:25:19,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-06 11:25:19,643 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 75 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:20,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:20,424 INFO L93 Difference]: Finished difference Result 467 states and 540 transitions. [2021-05-06 11:25:20,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-06 11:25:20,424 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 75 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2021-05-06 11:25:20,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:20,426 INFO L225 Difference]: With dead ends: 467 [2021-05-06 11:25:20,426 INFO L226 Difference]: Without dead ends: 453 [2021-05-06 11:25:20,426 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2089.7ms TimeCoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-06 11:25:20,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-05-06 11:25:20,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 167. [2021-05-06 11:25:20,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0123456790123457) internal successors, (164), 162 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:20,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2021-05-06 11:25:20,464 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2021-05-06 11:25:20,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:20,464 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2021-05-06 11:25:20,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 75 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:20,464 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2021-05-06 11:25:20,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-05-06 11:25:20,465 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:20,465 INFO L523 BasicCegarLoop]: trace histogram [73, 73, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:20,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-06 11:25:20,465 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:20,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:20,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1459423263, now seen corresponding path program 73 times [2021-05-06 11:25:20,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:20,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338794061] [2021-05-06 11:25:20,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:20,469 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:20,469 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:20,470 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:22,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:22,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:22,673 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:22,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338794061] [2021-05-06 11:25:22,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [338794061] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:22,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:22,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2021-05-06 11:25:22,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109012630] [2021-05-06 11:25:22,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-06 11:25:22,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:22,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-06 11:25:22,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2021-05-06 11:25:22,674 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 76 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:23,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:23,623 INFO L93 Difference]: Finished difference Result 473 states and 547 transitions. [2021-05-06 11:25:23,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-06 11:25:23,623 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 76 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2021-05-06 11:25:23,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:23,625 INFO L225 Difference]: With dead ends: 473 [2021-05-06 11:25:23,625 INFO L226 Difference]: Without dead ends: 459 [2021-05-06 11:25:23,625 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 2114.0ms TimeCoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2021-05-06 11:25:23,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-05-06 11:25:23,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 169. [2021-05-06 11:25:23,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:23,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2021-05-06 11:25:23,661 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 166 [2021-05-06 11:25:23,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:23,661 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2021-05-06 11:25:23,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 76 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:23,662 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2021-05-06 11:25:23,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-05-06 11:25:23,662 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:23,662 INFO L523 BasicCegarLoop]: trace histogram [74, 74, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:23,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-06 11:25:23,662 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:23,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:23,662 INFO L82 PathProgramCache]: Analyzing trace with hash 186204803, now seen corresponding path program 74 times [2021-05-06 11:25:23,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:23,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950253684] [2021-05-06 11:25:23,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:23,667 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:23,667 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:23,668 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:25,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:25,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:25,932 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:25,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950253684] [2021-05-06 11:25:25,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [950253684] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:25,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:25,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2021-05-06 11:25:25,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539295178] [2021-05-06 11:25:25,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-06 11:25:25,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:25,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-06 11:25:25,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2021-05-06 11:25:25,934 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 78 states, 78 states have (on average 2.051282051282051) internal successors, (160), 77 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:26,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:26,648 INFO L93 Difference]: Finished difference Result 479 states and 554 transitions. [2021-05-06 11:25:26,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-06 11:25:26,648 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.051282051282051) internal successors, (160), 77 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 168 [2021-05-06 11:25:26,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:26,649 INFO L225 Difference]: With dead ends: 479 [2021-05-06 11:25:26,649 INFO L226 Difference]: Without dead ends: 465 [2021-05-06 11:25:26,650 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2185.1ms TimeCoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2021-05-06 11:25:26,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-05-06 11:25:26,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 171. [2021-05-06 11:25:26,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0120481927710843) internal successors, (168), 166 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:26,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2021-05-06 11:25:26,692 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2021-05-06 11:25:26,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:26,692 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2021-05-06 11:25:26,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.051282051282051) internal successors, (160), 77 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:26,692 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2021-05-06 11:25:26,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-06 11:25:26,693 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:26,693 INFO L523 BasicCegarLoop]: trace histogram [75, 75, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:26,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-06 11:25:26,693 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:26,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:26,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1086811301, now seen corresponding path program 75 times [2021-05-06 11:25:26,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:26,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480601359] [2021-05-06 11:25:26,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:26,697 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:26,697 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:26,698 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:29,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:29,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:29,040 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:29,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480601359] [2021-05-06 11:25:29,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [480601359] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:29,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:29,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2021-05-06 11:25:29,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322305667] [2021-05-06 11:25:29,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-06 11:25:29,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:29,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-06 11:25:29,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-06 11:25:29,041 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand has 79 states, 79 states have (on average 2.050632911392405) internal successors, (162), 78 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:29,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:29,899 INFO L93 Difference]: Finished difference Result 485 states and 561 transitions. [2021-05-06 11:25:29,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-06 11:25:29,900 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.050632911392405) internal successors, (162), 78 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2021-05-06 11:25:29,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:29,901 INFO L225 Difference]: With dead ends: 485 [2021-05-06 11:25:29,901 INFO L226 Difference]: Without dead ends: 471 [2021-05-06 11:25:29,901 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2262.5ms TimeCoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-06 11:25:29,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-05-06 11:25:29,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 173. [2021-05-06 11:25:29,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:29,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2021-05-06 11:25:29,938 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2021-05-06 11:25:29,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:29,939 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2021-05-06 11:25:29,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 2.050632911392405) internal successors, (162), 78 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:29,939 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2021-05-06 11:25:29,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-05-06 11:25:29,939 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:29,939 INFO L523 BasicCegarLoop]: trace histogram [76, 76, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:29,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-06 11:25:29,940 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:29,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:29,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1013737913, now seen corresponding path program 76 times [2021-05-06 11:25:29,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:29,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589951002] [2021-05-06 11:25:29,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:29,946 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:29,946 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:29,946 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:32,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:32,315 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:32,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589951002] [2021-05-06 11:25:32,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [589951002] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:32,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:32,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2021-05-06 11:25:32,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959040764] [2021-05-06 11:25:32,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-06 11:25:32,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:32,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-06 11:25:32,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-06 11:25:32,316 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 80 states, 80 states have (on average 2.05) internal successors, (164), 79 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:33,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:33,333 INFO L93 Difference]: Finished difference Result 491 states and 568 transitions. [2021-05-06 11:25:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-06 11:25:33,333 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.05) internal successors, (164), 79 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 172 [2021-05-06 11:25:33,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:33,335 INFO L225 Difference]: With dead ends: 491 [2021-05-06 11:25:33,335 INFO L226 Difference]: Without dead ends: 477 [2021-05-06 11:25:33,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2290.7ms TimeCoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-06 11:25:33,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-05-06 11:25:33,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 175. [2021-05-06 11:25:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.011764705882353) internal successors, (172), 170 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2021-05-06 11:25:33,396 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 172 [2021-05-06 11:25:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:33,396 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2021-05-06 11:25:33,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 2.05) internal successors, (164), 79 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:33,397 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2021-05-06 11:25:33,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-05-06 11:25:33,397 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:33,397 INFO L523 BasicCegarLoop]: trace histogram [77, 77, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:33,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-06 11:25:33,397 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:33,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:33,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1006903447, now seen corresponding path program 77 times [2021-05-06 11:25:33,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:33,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200728432] [2021-05-06 11:25:33,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:33,402 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:33,402 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:33,402 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:35,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:35,833 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:35,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200728432] [2021-05-06 11:25:35,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [200728432] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:35,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:35,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2021-05-06 11:25:35,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896894072] [2021-05-06 11:25:35,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-06 11:25:35,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:35,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-06 11:25:35,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2021-05-06 11:25:35,835 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand has 81 states, 81 states have (on average 2.049382716049383) internal successors, (166), 80 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:36,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:36,741 INFO L93 Difference]: Finished difference Result 497 states and 575 transitions. [2021-05-06 11:25:36,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-06 11:25:36,741 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.049382716049383) internal successors, (166), 80 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2021-05-06 11:25:36,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:36,743 INFO L225 Difference]: With dead ends: 497 [2021-05-06 11:25:36,743 INFO L226 Difference]: Without dead ends: 483 [2021-05-06 11:25:36,743 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2348.4ms TimeCoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2021-05-06 11:25:36,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-05-06 11:25:36,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 177. [2021-05-06 11:25:36,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:36,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2021-05-06 11:25:36,780 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 174 [2021-05-06 11:25:36,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:36,781 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2021-05-06 11:25:36,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.049382716049383) internal successors, (166), 80 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:36,781 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2021-05-06 11:25:36,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-05-06 11:25:36,781 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:36,782 INFO L523 BasicCegarLoop]: trace histogram [78, 78, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:36,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-06 11:25:36,782 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:36,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:36,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1266051083, now seen corresponding path program 78 times [2021-05-06 11:25:36,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:36,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734497136] [2021-05-06 11:25:36,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:36,787 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:36,788 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:36,788 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:39,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:39,250 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:39,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734497136] [2021-05-06 11:25:39,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [734497136] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:39,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:39,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2021-05-06 11:25:39,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143539497] [2021-05-06 11:25:39,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-06 11:25:39,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:39,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-06 11:25:39,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-06 11:25:39,251 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 82 states, 82 states have (on average 2.048780487804878) internal successors, (168), 81 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:40,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:40,058 INFO L93 Difference]: Finished difference Result 503 states and 582 transitions. [2021-05-06 11:25:40,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-06 11:25:40,058 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.048780487804878) internal successors, (168), 81 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 176 [2021-05-06 11:25:40,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:40,059 INFO L225 Difference]: With dead ends: 503 [2021-05-06 11:25:40,059 INFO L226 Difference]: Without dead ends: 489 [2021-05-06 11:25:40,060 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2378.8ms TimeCoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-06 11:25:40,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-05-06 11:25:40,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 179. [2021-05-06 11:25:40,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0114942528735633) internal successors, (176), 174 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:40,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2021-05-06 11:25:40,099 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2021-05-06 11:25:40,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:40,099 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2021-05-06 11:25:40,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.048780487804878) internal successors, (168), 81 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:40,099 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2021-05-06 11:25:40,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-05-06 11:25:40,099 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:40,100 INFO L523 BasicCegarLoop]: trace histogram [79, 79, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:40,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-06 11:25:40,100 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:40,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:40,100 INFO L82 PathProgramCache]: Analyzing trace with hash -562999251, now seen corresponding path program 79 times [2021-05-06 11:25:40,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:40,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587576358] [2021-05-06 11:25:40,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:40,106 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:40,106 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:40,107 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:42,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:42,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:42,649 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:42,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587576358] [2021-05-06 11:25:42,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1587576358] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:42,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:42,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2021-05-06 11:25:42,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325736272] [2021-05-06 11:25:42,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-06 11:25:42,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:42,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-06 11:25:42,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2021-05-06 11:25:42,650 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand has 83 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 82 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:43,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:43,701 INFO L93 Difference]: Finished difference Result 509 states and 589 transitions. [2021-05-06 11:25:43,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-06 11:25:43,701 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 82 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 178 [2021-05-06 11:25:43,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:43,702 INFO L225 Difference]: With dead ends: 509 [2021-05-06 11:25:43,703 INFO L226 Difference]: Without dead ends: 495 [2021-05-06 11:25:43,703 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2459.0ms TimeCoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2021-05-06 11:25:43,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-05-06 11:25:43,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 181. [2021-05-06 11:25:43,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:43,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2021-05-06 11:25:43,751 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2021-05-06 11:25:43,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:43,751 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2021-05-06 11:25:43,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 82 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:43,751 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2021-05-06 11:25:43,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-06 11:25:43,751 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:43,752 INFO L523 BasicCegarLoop]: trace histogram [80, 80, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:43,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-06 11:25:43,752 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:43,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:43,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1638746161, now seen corresponding path program 80 times [2021-05-06 11:25:43,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:43,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787266538] [2021-05-06 11:25:43,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:43,756 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:43,756 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:43,756 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:46,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:46,348 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:46,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787266538] [2021-05-06 11:25:46,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [787266538] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:46,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:46,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2021-05-06 11:25:46,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851109209] [2021-05-06 11:25:46,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-06 11:25:46,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:46,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-06 11:25:46,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2021-05-06 11:25:46,350 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 84 states, 84 states have (on average 2.0476190476190474) internal successors, (172), 83 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:47,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:47,334 INFO L93 Difference]: Finished difference Result 515 states and 596 transitions. [2021-05-06 11:25:47,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-06 11:25:47,335 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0476190476190474) internal successors, (172), 83 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2021-05-06 11:25:47,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:47,336 INFO L225 Difference]: With dead ends: 515 [2021-05-06 11:25:47,336 INFO L226 Difference]: Without dead ends: 501 [2021-05-06 11:25:47,336 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2510.4ms TimeCoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2021-05-06 11:25:47,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-05-06 11:25:47,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 183. [2021-05-06 11:25:47,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0112359550561798) internal successors, (180), 178 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:47,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2021-05-06 11:25:47,378 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 180 [2021-05-06 11:25:47,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:47,378 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2021-05-06 11:25:47,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 2.0476190476190474) internal successors, (172), 83 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:47,378 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2021-05-06 11:25:47,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-05-06 11:25:47,379 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:47,379 INFO L523 BasicCegarLoop]: trace histogram [81, 81, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:47,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-06 11:25:47,379 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:47,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:47,379 INFO L82 PathProgramCache]: Analyzing trace with hash -344408335, now seen corresponding path program 81 times [2021-05-06 11:25:47,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:47,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067991331] [2021-05-06 11:25:47,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:47,383 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:47,383 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:47,384 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:50,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:50,034 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:50,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067991331] [2021-05-06 11:25:50,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1067991331] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:50,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:50,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2021-05-06 11:25:50,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409981031] [2021-05-06 11:25:50,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-06 11:25:50,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:50,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-06 11:25:50,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-06 11:25:50,036 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand has 85 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 84 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:51,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:51,246 INFO L93 Difference]: Finished difference Result 521 states and 603 transitions. [2021-05-06 11:25:51,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-06 11:25:51,247 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 84 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2021-05-06 11:25:51,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:51,248 INFO L225 Difference]: With dead ends: 521 [2021-05-06 11:25:51,248 INFO L226 Difference]: Without dead ends: 507 [2021-05-06 11:25:51,249 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2570.0ms TimeCoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-06 11:25:51,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-05-06 11:25:51,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 185. [2021-05-06 11:25:51,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.011111111111111) internal successors, (182), 180 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:51,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2021-05-06 11:25:51,300 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 182 [2021-05-06 11:25:51,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:51,300 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2021-05-06 11:25:51,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 84 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:51,300 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2021-05-06 11:25:51,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-05-06 11:25:51,301 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:51,301 INFO L523 BasicCegarLoop]: trace histogram [82, 82, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:51,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-06 11:25:51,301 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:51,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:51,302 INFO L82 PathProgramCache]: Analyzing trace with hash -2026273389, now seen corresponding path program 82 times [2021-05-06 11:25:51,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:51,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943989569] [2021-05-06 11:25:51,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:51,306 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:51,306 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:51,307 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:54,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:54,003 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:54,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943989569] [2021-05-06 11:25:54,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [943989569] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:54,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:54,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2021-05-06 11:25:54,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555446449] [2021-05-06 11:25:54,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-06 11:25:54,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:54,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-06 11:25:54,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-06 11:25:54,004 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 86 states, 86 states have (on average 2.046511627906977) internal successors, (176), 85 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:54,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:54,863 INFO L93 Difference]: Finished difference Result 527 states and 610 transitions. [2021-05-06 11:25:54,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-06 11:25:54,863 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.046511627906977) internal successors, (176), 85 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 184 [2021-05-06 11:25:54,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:54,865 INFO L225 Difference]: With dead ends: 527 [2021-05-06 11:25:54,865 INFO L226 Difference]: Without dead ends: 513 [2021-05-06 11:25:54,865 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2614.0ms TimeCoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-06 11:25:54,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-05-06 11:25:54,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 187. [2021-05-06 11:25:54,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.010989010989011) internal successors, (184), 182 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:54,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2021-05-06 11:25:54,927 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2021-05-06 11:25:54,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:54,928 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2021-05-06 11:25:54,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.046511627906977) internal successors, (176), 85 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:54,928 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2021-05-06 11:25:54,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-05-06 11:25:54,928 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:54,928 INFO L523 BasicCegarLoop]: trace histogram [83, 83, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:54,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-06 11:25:54,929 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:54,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:54,929 INFO L82 PathProgramCache]: Analyzing trace with hash 904080309, now seen corresponding path program 83 times [2021-05-06 11:25:54,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:54,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154668947] [2021-05-06 11:25:54,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:54,932 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:54,932 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:54,933 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:57,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:57,734 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:57,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154668947] [2021-05-06 11:25:57,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [154668947] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:57,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:57,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2021-05-06 11:25:57,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857694373] [2021-05-06 11:25:57,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-06 11:25:57,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:57,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-06 11:25:57,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2021-05-06 11:25:57,736 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand has 87 states, 87 states have (on average 2.045977011494253) internal successors, (178), 86 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:58,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:58,711 INFO L93 Difference]: Finished difference Result 533 states and 617 transitions. [2021-05-06 11:25:58,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-06 11:25:58,711 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.045977011494253) internal successors, (178), 86 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 186 [2021-05-06 11:25:58,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:58,713 INFO L225 Difference]: With dead ends: 533 [2021-05-06 11:25:58,713 INFO L226 Difference]: Without dead ends: 519 [2021-05-06 11:25:58,713 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2708.1ms TimeCoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2021-05-06 11:25:58,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-05-06 11:25:58,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 189. [2021-05-06 11:25:58,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:58,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2021-05-06 11:25:58,759 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2021-05-06 11:25:58,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:58,759 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2021-05-06 11:25:58,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 2.045977011494253) internal successors, (178), 86 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:58,759 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2021-05-06 11:25:58,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-05-06 11:25:58,759 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:58,760 INFO L523 BasicCegarLoop]: trace histogram [84, 84, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:58,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-06 11:25:58,760 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:58,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:58,760 INFO L82 PathProgramCache]: Analyzing trace with hash -524562089, now seen corresponding path program 84 times [2021-05-06 11:25:58,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:58,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640482267] [2021-05-06 11:25:58,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:58,763 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:58,763 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:58,764 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:01,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:01,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:01,594 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:01,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640482267] [2021-05-06 11:26:01,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [640482267] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:01,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:01,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2021-05-06 11:26:01,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543553652] [2021-05-06 11:26:01,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-06 11:26:01,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:01,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-06 11:26:01,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-06 11:26:01,596 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 88 states, 88 states have (on average 2.0454545454545454) internal successors, (180), 87 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:02,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:02,581 INFO L93 Difference]: Finished difference Result 539 states and 624 transitions. [2021-05-06 11:26:02,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-06 11:26:02,582 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0454545454545454) internal successors, (180), 87 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2021-05-06 11:26:02,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:02,583 INFO L225 Difference]: With dead ends: 539 [2021-05-06 11:26:02,583 INFO L226 Difference]: Without dead ends: 525 [2021-05-06 11:26:02,583 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2741.7ms TimeCoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-06 11:26:02,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-05-06 11:26:02,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 191. [2021-05-06 11:26:02,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.010752688172043) internal successors, (188), 186 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:02,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2021-05-06 11:26:02,644 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 188 [2021-05-06 11:26:02,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:02,644 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2021-05-06 11:26:02,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 2.0454545454545454) internal successors, (180), 87 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:02,645 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2021-05-06 11:26:02,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-06 11:26:02,645 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:02,645 INFO L523 BasicCegarLoop]: trace histogram [85, 85, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:02,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-06 11:26:02,645 INFO L428 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:02,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:02,646 INFO L82 PathProgramCache]: Analyzing trace with hash 939628153, now seen corresponding path program 85 times [2021-05-06 11:26:02,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:02,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772368853] [2021-05-06 11:26:02,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:02,650 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:02,650 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:02,650 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:05,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:05,550 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:05,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772368853] [2021-05-06 11:26:05,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1772368853] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:05,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:05,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2021-05-06 11:26:05,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267093745] [2021-05-06 11:26:05,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-06 11:26:05,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:05,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-06 11:26:05,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2021-05-06 11:26:05,552 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand has 89 states, 89 states have (on average 2.044943820224719) internal successors, (182), 88 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:06,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:06,476 INFO L93 Difference]: Finished difference Result 545 states and 631 transitions. [2021-05-06 11:26:06,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-06 11:26:06,477 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.044943820224719) internal successors, (182), 88 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2021-05-06 11:26:06,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:06,478 INFO L225 Difference]: With dead ends: 545 [2021-05-06 11:26:06,478 INFO L226 Difference]: Without dead ends: 531 [2021-05-06 11:26:06,479 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2814.0ms TimeCoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2021-05-06 11:26:06,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-05-06 11:26:06,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 193. [2021-05-06 11:26:06,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:06,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2021-05-06 11:26:06,537 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 190 [2021-05-06 11:26:06,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:06,537 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2021-05-06 11:26:06,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 2.044943820224719) internal successors, (182), 88 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:06,537 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2021-05-06 11:26:06,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-05-06 11:26:06,537 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:06,537 INFO L523 BasicCegarLoop]: trace histogram [86, 86, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:06,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-06 11:26:06,538 INFO L428 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:06,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:06,538 INFO L82 PathProgramCache]: Analyzing trace with hash -722822373, now seen corresponding path program 86 times [2021-05-06 11:26:06,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:06,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655618036] [2021-05-06 11:26:06,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:06,546 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:06,546 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:06,547 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:09,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:09,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:09,529 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:09,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655618036] [2021-05-06 11:26:09,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1655618036] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:09,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:09,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2021-05-06 11:26:09,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414827228] [2021-05-06 11:26:09,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-06 11:26:09,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:09,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-06 11:26:09,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2021-05-06 11:26:09,530 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand has 90 states, 90 states have (on average 2.0444444444444443) internal successors, (184), 89 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:10,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:10,710 INFO L93 Difference]: Finished difference Result 551 states and 638 transitions. [2021-05-06 11:26:10,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-06 11:26:10,720 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.0444444444444443) internal successors, (184), 89 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 192 [2021-05-06 11:26:10,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:10,721 INFO L225 Difference]: With dead ends: 551 [2021-05-06 11:26:10,721 INFO L226 Difference]: Without dead ends: 537 [2021-05-06 11:26:10,722 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2881.9ms TimeCoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2021-05-06 11:26:10,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-05-06 11:26:10,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 195. [2021-05-06 11:26:10,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0105263157894737) internal successors, (192), 190 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:10,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2021-05-06 11:26:10,770 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2021-05-06 11:26:10,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:10,770 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2021-05-06 11:26:10,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.0444444444444443) internal successors, (184), 89 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:10,770 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2021-05-06 11:26:10,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-05-06 11:26:10,771 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:10,771 INFO L523 BasicCegarLoop]: trace histogram [87, 87, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:10,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-06 11:26:10,771 INFO L428 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:10,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:10,772 INFO L82 PathProgramCache]: Analyzing trace with hash -609943747, now seen corresponding path program 87 times [2021-05-06 11:26:10,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:10,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554344679] [2021-05-06 11:26:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:10,784 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:10,785 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:10,785 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:13,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:13,811 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:13,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554344679] [2021-05-06 11:26:13,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [554344679] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:13,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:13,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2021-05-06 11:26:13,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613025373] [2021-05-06 11:26:13,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-06 11:26:13,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:13,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-06 11:26:13,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-06 11:26:13,813 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand has 91 states, 91 states have (on average 2.043956043956044) internal successors, (186), 90 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:15,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:15,076 INFO L93 Difference]: Finished difference Result 557 states and 645 transitions. [2021-05-06 11:26:15,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-06 11:26:15,076 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.043956043956044) internal successors, (186), 90 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 194 [2021-05-06 11:26:15,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:15,078 INFO L225 Difference]: With dead ends: 557 [2021-05-06 11:26:15,078 INFO L226 Difference]: Without dead ends: 543 [2021-05-06 11:26:15,079 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2935.2ms TimeCoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-06 11:26:15,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-05-06 11:26:15,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 197. [2021-05-06 11:26:15,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 192 states have internal predecessors, (194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:15,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2021-05-06 11:26:15,130 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2021-05-06 11:26:15,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:15,130 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2021-05-06 11:26:15,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 2.043956043956044) internal successors, (186), 90 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:15,130 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2021-05-06 11:26:15,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-05-06 11:26:15,131 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:15,131 INFO L523 BasicCegarLoop]: trace histogram [88, 88, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:15,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-06 11:26:15,131 INFO L428 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:15,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:15,131 INFO L82 PathProgramCache]: Analyzing trace with hash 492233439, now seen corresponding path program 88 times [2021-05-06 11:26:15,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:15,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420815481] [2021-05-06 11:26:15,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:15,136 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:15,136 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:15,136 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:18,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:18,203 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:18,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420815481] [2021-05-06 11:26:18,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1420815481] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:18,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:18,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2021-05-06 11:26:18,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708469137] [2021-05-06 11:26:18,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-06 11:26:18,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:18,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-06 11:26:18,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-06 11:26:18,204 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 92 states, 92 states have (on average 2.0434782608695654) internal successors, (188), 91 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:19,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:19,298 INFO L93 Difference]: Finished difference Result 563 states and 652 transitions. [2021-05-06 11:26:19,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-06 11:26:19,298 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0434782608695654) internal successors, (188), 91 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 196 [2021-05-06 11:26:19,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:19,300 INFO L225 Difference]: With dead ends: 563 [2021-05-06 11:26:19,300 INFO L226 Difference]: Without dead ends: 549 [2021-05-06 11:26:19,300 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2981.0ms TimeCoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-06 11:26:19,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-05-06 11:26:19,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 199. [2021-05-06 11:26:19,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0103092783505154) internal successors, (196), 194 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:19,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2021-05-06 11:26:19,375 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 196 [2021-05-06 11:26:19,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:19,375 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2021-05-06 11:26:19,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 2.0434782608695654) internal successors, (188), 91 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:19,375 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2021-05-06 11:26:19,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-05-06 11:26:19,376 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:19,376 INFO L523 BasicCegarLoop]: trace histogram [89, 89, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:19,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-06 11:26:19,376 INFO L428 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:19,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:19,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1172412927, now seen corresponding path program 89 times [2021-05-06 11:26:19,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:19,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417591386] [2021-05-06 11:26:19,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:19,380 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:19,380 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:19,380 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:22,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:22,533 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:22,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417591386] [2021-05-06 11:26:22,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [417591386] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:22,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:22,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2021-05-06 11:26:22,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590469915] [2021-05-06 11:26:22,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-05-06 11:26:22,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:22,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-05-06 11:26:22,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2021-05-06 11:26:22,534 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand has 93 states, 93 states have (on average 2.043010752688172) internal successors, (190), 92 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:23,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:23,665 INFO L93 Difference]: Finished difference Result 569 states and 659 transitions. [2021-05-06 11:26:23,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-06 11:26:23,666 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.043010752688172) internal successors, (190), 92 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 198 [2021-05-06 11:26:23,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:23,667 INFO L225 Difference]: With dead ends: 569 [2021-05-06 11:26:23,667 INFO L226 Difference]: Without dead ends: 555 [2021-05-06 11:26:23,667 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 3074.6ms TimeCoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2021-05-06 11:26:23,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-05-06 11:26:23,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 201. [2021-05-06 11:26:23,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:23,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2021-05-06 11:26:23,721 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 198 [2021-05-06 11:26:23,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:23,721 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2021-05-06 11:26:23,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 93 states, 93 states have (on average 2.043010752688172) internal successors, (190), 92 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:23,721 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2021-05-06 11:26:23,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-06 11:26:23,722 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:23,722 INFO L523 BasicCegarLoop]: trace histogram [90, 90, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:23,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-06 11:26:23,722 INFO L428 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:23,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:23,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1125230755, now seen corresponding path program 90 times [2021-05-06 11:26:23,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:23,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707422234] [2021-05-06 11:26:23,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:23,728 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:23,728 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:23,728 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:26,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:26,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:26,947 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:26,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707422234] [2021-05-06 11:26:26,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [707422234] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:26,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:26,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2021-05-06 11:26:26,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017835571] [2021-05-06 11:26:26,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-06 11:26:26,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:26,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-06 11:26:26,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-06 11:26:26,949 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand has 94 states, 94 states have (on average 2.0425531914893615) internal successors, (192), 93 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:28,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:28,439 INFO L93 Difference]: Finished difference Result 575 states and 666 transitions. [2021-05-06 11:26:28,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-06 11:26:28,439 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0425531914893615) internal successors, (192), 93 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2021-05-06 11:26:28,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:28,441 INFO L225 Difference]: With dead ends: 575 [2021-05-06 11:26:28,441 INFO L226 Difference]: Without dead ends: 561 [2021-05-06 11:26:28,441 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 3138.3ms TimeCoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-06 11:26:28,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-05-06 11:26:28,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 203. [2021-05-06 11:26:28,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.0101010101010102) internal successors, (200), 198 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:28,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2021-05-06 11:26:28,497 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2021-05-06 11:26:28,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:28,497 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2021-05-06 11:26:28,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.0425531914893615) internal successors, (192), 93 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:28,497 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2021-05-06 11:26:28,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-05-06 11:26:28,498 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:28,498 INFO L523 BasicCegarLoop]: trace histogram [91, 91, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:28,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-06 11:26:28,498 INFO L428 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:28,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:28,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1547619013, now seen corresponding path program 91 times [2021-05-06 11:26:28,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:28,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228684040] [2021-05-06 11:26:28,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:28,502 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:28,502 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:28,503 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:31,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:31,796 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:31,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228684040] [2021-05-06 11:26:31,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [228684040] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:31,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:31,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2021-05-06 11:26:31,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446651616] [2021-05-06 11:26:31,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-06 11:26:31,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:31,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-06 11:26:31,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2021-05-06 11:26:31,797 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand has 95 states, 95 states have (on average 2.042105263157895) internal successors, (194), 94 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:33,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:33,294 INFO L93 Difference]: Finished difference Result 581 states and 673 transitions. [2021-05-06 11:26:33,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-06 11:26:33,313 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.042105263157895) internal successors, (194), 94 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 202 [2021-05-06 11:26:33,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:33,315 INFO L225 Difference]: With dead ends: 581 [2021-05-06 11:26:33,315 INFO L226 Difference]: Without dead ends: 567 [2021-05-06 11:26:33,315 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 3198.4ms TimeCoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2021-05-06 11:26:33,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-05-06 11:26:33,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 205. [2021-05-06 11:26:33,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.01) internal successors, (202), 200 states have internal predecessors, (202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:33,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2021-05-06 11:26:33,410 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 202 [2021-05-06 11:26:33,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:33,411 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2021-05-06 11:26:33,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 95 states, 95 states have (on average 2.042105263157895) internal successors, (194), 94 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:33,411 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2021-05-06 11:26:33,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-05-06 11:26:33,412 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:33,412 INFO L523 BasicCegarLoop]: trace histogram [92, 92, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:33,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-06 11:26:33,412 INFO L428 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:33,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:33,412 INFO L82 PathProgramCache]: Analyzing trace with hash -559158169, now seen corresponding path program 92 times [2021-05-06 11:26:33,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:33,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581882217] [2021-05-06 11:26:33,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:33,420 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:33,420 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:33,426 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:36,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:36,855 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:36,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581882217] [2021-05-06 11:26:36,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1581882217] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:36,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:36,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2021-05-06 11:26:36,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478960934] [2021-05-06 11:26:36,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-06 11:26:36,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:36,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-06 11:26:36,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2021-05-06 11:26:36,857 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 96 states, 96 states have (on average 2.0416666666666665) internal successors, (196), 95 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:38,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:38,423 INFO L93 Difference]: Finished difference Result 587 states and 680 transitions. [2021-05-06 11:26:38,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-06 11:26:38,424 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0416666666666665) internal successors, (196), 95 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 204 [2021-05-06 11:26:38,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:38,425 INFO L225 Difference]: With dead ends: 587 [2021-05-06 11:26:38,426 INFO L226 Difference]: Without dead ends: 573 [2021-05-06 11:26:38,426 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 3332.0ms TimeCoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2021-05-06 11:26:38,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-05-06 11:26:38,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 207. [2021-05-06 11:26:38,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.00990099009901) internal successors, (204), 202 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:38,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2021-05-06 11:26:38,485 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 204 [2021-05-06 11:26:38,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:38,485 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2021-05-06 11:26:38,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 96 states, 96 states have (on average 2.0416666666666665) internal successors, (196), 95 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:38,485 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2021-05-06 11:26:38,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-05-06 11:26:38,485 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:38,485 INFO L523 BasicCegarLoop]: trace histogram [93, 93, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:38,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-06 11:26:38,486 INFO L428 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:38,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:38,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2052533641, now seen corresponding path program 93 times [2021-05-06 11:26:38,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:38,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546862193] [2021-05-06 11:26:38,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:38,489 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:38,489 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:38,490 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:41,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:41,898 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:41,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546862193] [2021-05-06 11:26:41,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1546862193] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:41,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:41,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2021-05-06 11:26:41,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825553469] [2021-05-06 11:26:41,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-06 11:26:41,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:41,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-06 11:26:41,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-06 11:26:41,900 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand has 97 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 96 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:43,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:43,238 INFO L93 Difference]: Finished difference Result 593 states and 687 transitions. [2021-05-06 11:26:43,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-06 11:26:43,238 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 96 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2021-05-06 11:26:43,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:43,240 INFO L225 Difference]: With dead ends: 593 [2021-05-06 11:26:43,240 INFO L226 Difference]: Without dead ends: 579 [2021-05-06 11:26:43,240 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 3314.7ms TimeCoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-06 11:26:43,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-05-06 11:26:43,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 209. [2021-05-06 11:26:43,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0098039215686274) internal successors, (206), 204 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:43,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2021-05-06 11:26:43,301 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 206 [2021-05-06 11:26:43,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:43,302 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2021-05-06 11:26:43,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 96 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:43,302 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2021-05-06 11:26:43,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-05-06 11:26:43,302 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:43,303 INFO L523 BasicCegarLoop]: trace histogram [94, 94, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:43,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-05-06 11:26:43,303 INFO L428 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:43,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:43,303 INFO L82 PathProgramCache]: Analyzing trace with hash -667505109, now seen corresponding path program 94 times [2021-05-06 11:26:43,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:43,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519918618] [2021-05-06 11:26:43,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:43,306 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:43,306 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:43,307 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:46,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:46,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:46,776 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:46,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519918618] [2021-05-06 11:26:46,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1519918618] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:46,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:46,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2021-05-06 11:26:46,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484628644] [2021-05-06 11:26:46,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-06 11:26:46,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:46,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-06 11:26:46,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-06 11:26:46,778 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand has 98 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 97 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:47,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:47,942 INFO L93 Difference]: Finished difference Result 599 states and 694 transitions. [2021-05-06 11:26:47,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-06 11:26:47,943 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 97 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 208 [2021-05-06 11:26:47,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:47,945 INFO L225 Difference]: With dead ends: 599 [2021-05-06 11:26:47,945 INFO L226 Difference]: Without dead ends: 585 [2021-05-06 11:26:47,945 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3380.5ms TimeCoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-06 11:26:47,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-05-06 11:26:48,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 211. [2021-05-06 11:26:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0097087378640777) internal successors, (208), 206 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2021-05-06 11:26:48,009 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 208 [2021-05-06 11:26:48,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:48,009 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2021-05-06 11:26:48,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 97 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:48,009 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2021-05-06 11:26:48,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-06 11:26:48,010 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:48,010 INFO L523 BasicCegarLoop]: trace histogram [95, 95, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:48,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-05-06 11:26:48,010 INFO L428 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:48,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:48,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1010339405, now seen corresponding path program 95 times [2021-05-06 11:26:48,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:48,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020444386] [2021-05-06 11:26:48,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:48,014 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:48,014 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:48,014 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:51,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:51,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:51,604 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:51,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020444386] [2021-05-06 11:26:51,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1020444386] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:51,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:51,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2021-05-06 11:26:51,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976757064] [2021-05-06 11:26:51,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2021-05-06 11:26:51,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:51,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-05-06 11:26:51,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2021-05-06 11:26:51,605 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand has 99 states, 99 states have (on average 2.04040404040404) internal successors, (202), 98 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:53,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:53,343 INFO L93 Difference]: Finished difference Result 605 states and 701 transitions. [2021-05-06 11:26:53,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-06 11:26:53,344 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.04040404040404) internal successors, (202), 98 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 210 [2021-05-06 11:26:53,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:53,345 INFO L225 Difference]: With dead ends: 605 [2021-05-06 11:26:53,345 INFO L226 Difference]: Without dead ends: 591 [2021-05-06 11:26:53,346 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 3488.6ms TimeCoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2021-05-06 11:26:53,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-05-06 11:26:53,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 213. [2021-05-06 11:26:53,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.0096153846153846) internal successors, (210), 208 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2021-05-06 11:26:53,411 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 210 [2021-05-06 11:26:53,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:53,411 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2021-05-06 11:26:53,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 99 states, 99 states have (on average 2.04040404040404) internal successors, (202), 98 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:53,411 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2021-05-06 11:26:53,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-05-06 11:26:53,411 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:53,412 INFO L523 BasicCegarLoop]: trace histogram [96, 96, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:53,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-05-06 11:26:53,412 INFO L428 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:53,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:53,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1488785937, now seen corresponding path program 96 times [2021-05-06 11:26:53,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:53,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601112240] [2021-05-06 11:26:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:53,420 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:53,420 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:53,420 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:57,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:57,057 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:57,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601112240] [2021-05-06 11:26:57,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1601112240] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:57,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:57,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2021-05-06 11:26:57,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270725564] [2021-05-06 11:26:57,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-06 11:26:57,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:57,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-06 11:26:57,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-06 11:26:57,059 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand has 100 states, 100 states have (on average 2.04) internal successors, (204), 99 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:58,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:58,315 INFO L93 Difference]: Finished difference Result 611 states and 708 transitions. [2021-05-06 11:26:58,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-05-06 11:26:58,315 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.04) internal successors, (204), 99 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 212 [2021-05-06 11:26:58,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:58,316 INFO L225 Difference]: With dead ends: 611 [2021-05-06 11:26:58,316 INFO L226 Difference]: Without dead ends: 597 [2021-05-06 11:26:58,317 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 3544.2ms TimeCoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-06 11:26:58,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-05-06 11:26:58,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 215. [2021-05-06 11:26:58,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.0095238095238095) internal successors, (212), 210 states have internal predecessors, (212), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:58,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2021-05-06 11:26:58,391 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 212 [2021-05-06 11:26:58,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:58,391 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2021-05-06 11:26:58,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 100 states have (on average 2.04) internal successors, (204), 99 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:58,391 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2021-05-06 11:26:58,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-05-06 11:26:58,392 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:58,392 INFO L523 BasicCegarLoop]: trace histogram [97, 97, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:58,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-05-06 11:26:58,392 INFO L428 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:58,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:58,392 INFO L82 PathProgramCache]: Analyzing trace with hash 2033446161, now seen corresponding path program 97 times [2021-05-06 11:26:58,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:58,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301718812] [2021-05-06 11:26:58,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:58,396 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:58,396 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:58,397 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:02,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:02,105 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:02,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301718812] [2021-05-06 11:27:02,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1301718812] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:02,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:02,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2021-05-06 11:27:02,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405161909] [2021-05-06 11:27:02,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2021-05-06 11:27:02,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:02,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-05-06 11:27:02,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2021-05-06 11:27:02,106 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand has 101 states, 101 states have (on average 2.0396039603960396) internal successors, (206), 100 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:03,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:03,578 INFO L93 Difference]: Finished difference Result 617 states and 715 transitions. [2021-05-06 11:27:03,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-06 11:27:03,578 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0396039603960396) internal successors, (206), 100 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 214 [2021-05-06 11:27:03,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:03,579 INFO L225 Difference]: With dead ends: 617 [2021-05-06 11:27:03,579 INFO L226 Difference]: Without dead ends: 603 [2021-05-06 11:27:03,580 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 3614.8ms TimeCoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2021-05-06 11:27:03,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-05-06 11:27:03,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 217. [2021-05-06 11:27:03,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.009433962264151) internal successors, (214), 212 states have internal predecessors, (214), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:03,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2021-05-06 11:27:03,647 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 214 [2021-05-06 11:27:03,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:03,648 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2021-05-06 11:27:03,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 101 states, 101 states have (on average 2.0396039603960396) internal successors, (206), 100 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:03,648 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2021-05-06 11:27:03,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-05-06 11:27:03,648 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:03,648 INFO L523 BasicCegarLoop]: trace histogram [98, 98, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:03,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-05-06 11:27:03,649 INFO L428 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:03,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:03,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1830704205, now seen corresponding path program 98 times [2021-05-06 11:27:03,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:03,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519300402] [2021-05-06 11:27:03,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:03,654 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:03,654 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:03,655 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:07,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:07,412 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:07,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519300402] [2021-05-06 11:27:07,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1519300402] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:07,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:07,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2021-05-06 11:27:07,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725739728] [2021-05-06 11:27:07,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-05-06 11:27:07,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:07,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-05-06 11:27:07,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2021-05-06 11:27:07,414 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand has 102 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 101 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:09,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:09,262 INFO L93 Difference]: Finished difference Result 623 states and 722 transitions. [2021-05-06 11:27:09,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-06 11:27:09,263 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 101 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 216 [2021-05-06 11:27:09,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:09,264 INFO L225 Difference]: With dead ends: 623 [2021-05-06 11:27:09,264 INFO L226 Difference]: Without dead ends: 609 [2021-05-06 11:27:09,264 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 3666.6ms TimeCoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2021-05-06 11:27:09,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-05-06 11:27:09,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 219. [2021-05-06 11:27:09,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.0093457943925233) internal successors, (216), 214 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:09,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2021-05-06 11:27:09,333 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 216 [2021-05-06 11:27:09,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:09,333 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2021-05-06 11:27:09,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 101 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:09,333 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2021-05-06 11:27:09,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-05-06 11:27:09,334 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:09,334 INFO L523 BasicCegarLoop]: trace histogram [99, 99, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:09,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-05-06 11:27:09,334 INFO L428 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:09,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:09,334 INFO L82 PathProgramCache]: Analyzing trace with hash -132494891, now seen corresponding path program 99 times [2021-05-06 11:27:09,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:09,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708228967] [2021-05-06 11:27:09,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:09,337 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:09,337 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:09,338 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:13,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:13,203 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:13,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708228967] [2021-05-06 11:27:13,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [708228967] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:13,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:13,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2021-05-06 11:27:13,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763519464] [2021-05-06 11:27:13,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2021-05-06 11:27:13,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:13,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-05-06 11:27:13,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-06 11:27:13,205 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand has 103 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 102 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:15,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:15,086 INFO L93 Difference]: Finished difference Result 629 states and 729 transitions. [2021-05-06 11:27:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-06 11:27:15,086 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 102 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 218 [2021-05-06 11:27:15,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:15,087 INFO L225 Difference]: With dead ends: 629 [2021-05-06 11:27:15,087 INFO L226 Difference]: Without dead ends: 615 [2021-05-06 11:27:15,088 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 3774.5ms TimeCoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-06 11:27:15,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-05-06 11:27:15,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 221. [2021-05-06 11:27:15,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.0092592592592593) internal successors, (218), 216 states have internal predecessors, (218), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:15,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 222 transitions. [2021-05-06 11:27:15,158 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 222 transitions. Word has length 218 [2021-05-06 11:27:15,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:15,158 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 222 transitions. [2021-05-06 11:27:15,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 103 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 102 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:15,158 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 222 transitions. [2021-05-06 11:27:15,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-05-06 11:27:15,159 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:15,159 INFO L523 BasicCegarLoop]: trace histogram [100, 100, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:15,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-05-06 11:27:15,159 INFO L428 AbstractCegarLoop]: === Iteration 104 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:15,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:15,159 INFO L82 PathProgramCache]: Analyzing trace with hash -240916617, now seen corresponding path program 100 times [2021-05-06 11:27:15,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:15,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783486680] [2021-05-06 11:27:15,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:15,163 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:15,163 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:15,163 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:19,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:19,151 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:19,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783486680] [2021-05-06 11:27:19,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1783486680] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:19,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:19,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2021-05-06 11:27:19,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381409011] [2021-05-06 11:27:19,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2021-05-06 11:27:19,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:19,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-05-06 11:27:19,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2021-05-06 11:27:19,152 INFO L87 Difference]: Start difference. First operand 221 states and 222 transitions. Second operand has 104 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 103 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:20,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:20,898 INFO L93 Difference]: Finished difference Result 635 states and 736 transitions. [2021-05-06 11:27:20,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-06 11:27:20,898 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 103 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 220 [2021-05-06 11:27:20,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:20,899 INFO L225 Difference]: With dead ends: 635 [2021-05-06 11:27:20,899 INFO L226 Difference]: Without dead ends: 621 [2021-05-06 11:27:20,900 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 3885.9ms TimeCoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2021-05-06 11:27:20,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-05-06 11:27:20,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 223. [2021-05-06 11:27:20,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.0091743119266054) internal successors, (220), 218 states have internal predecessors, (220), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2021-05-06 11:27:20,980 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 220 [2021-05-06 11:27:20,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:20,981 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2021-05-06 11:27:20,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 104 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 103 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:20,981 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2021-05-06 11:27:20,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-05-06 11:27:20,981 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:20,981 INFO L523 BasicCegarLoop]: trace histogram [101, 101, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:20,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-05-06 11:27:20,982 INFO L428 AbstractCegarLoop]: === Iteration 105 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:20,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:20,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1354980199, now seen corresponding path program 101 times [2021-05-06 11:27:20,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:20,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317160968] [2021-05-06 11:27:20,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:20,987 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:20,987 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:20,987 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:25,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:25,014 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:25,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317160968] [2021-05-06 11:27:25,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1317160968] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:25,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:25,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2021-05-06 11:27:25,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942274549] [2021-05-06 11:27:25,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2021-05-06 11:27:25,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:25,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-05-06 11:27:25,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2021-05-06 11:27:25,016 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand has 105 states, 105 states have (on average 2.038095238095238) internal successors, (214), 104 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:26,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:26,592 INFO L93 Difference]: Finished difference Result 641 states and 743 transitions. [2021-05-06 11:27:26,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-06 11:27:26,592 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.038095238095238) internal successors, (214), 104 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 222 [2021-05-06 11:27:26,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:26,593 INFO L225 Difference]: With dead ends: 641 [2021-05-06 11:27:26,593 INFO L226 Difference]: Without dead ends: 627 [2021-05-06 11:27:26,594 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 3922.1ms TimeCoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2021-05-06 11:27:26,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-05-06 11:27:26,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 225. [2021-05-06 11:27:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.009090909090909) internal successors, (222), 220 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:26,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2021-05-06 11:27:26,668 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 222 [2021-05-06 11:27:26,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:26,669 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2021-05-06 11:27:26,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 105 states, 105 states have (on average 2.038095238095238) internal successors, (214), 104 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:26,669 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2021-05-06 11:27:26,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-05-06 11:27:26,669 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:26,669 INFO L523 BasicCegarLoop]: trace histogram [102, 102, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:26,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-05-06 11:27:26,670 INFO L428 AbstractCegarLoop]: === Iteration 106 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:26,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:26,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1771741499, now seen corresponding path program 102 times [2021-05-06 11:27:26,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:26,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895954015] [2021-05-06 11:27:26,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:26,673 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:26,673 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:26,673 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:30,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:30,789 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:30,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895954015] [2021-05-06 11:27:30,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1895954015] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:30,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:30,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2021-05-06 11:27:30,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870845298] [2021-05-06 11:27:30,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-06 11:27:30,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:30,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-06 11:27:30,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-06 11:27:30,790 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand has 106 states, 106 states have (on average 2.0377358490566038) internal successors, (216), 105 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:32,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:32,819 INFO L93 Difference]: Finished difference Result 647 states and 750 transitions. [2021-05-06 11:27:32,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-06 11:27:32,819 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0377358490566038) internal successors, (216), 105 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 224 [2021-05-06 11:27:32,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:32,820 INFO L225 Difference]: With dead ends: 647 [2021-05-06 11:27:32,820 INFO L226 Difference]: Without dead ends: 633 [2021-05-06 11:27:32,821 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 4020.9ms TimeCoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-06 11:27:32,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-05-06 11:27:32,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 227. [2021-05-06 11:27:32,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.009009009009009) internal successors, (224), 222 states have internal predecessors, (224), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:32,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2021-05-06 11:27:32,907 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 224 [2021-05-06 11:27:32,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:32,907 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2021-05-06 11:27:32,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.0377358490566038) internal successors, (216), 105 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:32,907 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2021-05-06 11:27:32,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-05-06 11:27:32,908 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:32,908 INFO L523 BasicCegarLoop]: trace histogram [103, 103, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:32,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-05-06 11:27:32,908 INFO L428 AbstractCegarLoop]: === Iteration 107 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:32,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:32,909 INFO L82 PathProgramCache]: Analyzing trace with hash 74186077, now seen corresponding path program 103 times [2021-05-06 11:27:32,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:32,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654239276] [2021-05-06 11:27:32,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:32,918 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:32,918 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:32,919 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:37,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:37,183 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:37,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654239276] [2021-05-06 11:27:37,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1654239276] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:37,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:37,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2021-05-06 11:27:37,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894183362] [2021-05-06 11:27:37,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 107 states [2021-05-06 11:27:37,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:37,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-05-06 11:27:37,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2021-05-06 11:27:37,184 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand has 107 states, 107 states have (on average 2.0373831775700935) internal successors, (218), 106 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:38,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:38,843 INFO L93 Difference]: Finished difference Result 653 states and 757 transitions. [2021-05-06 11:27:38,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-05-06 11:27:38,843 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0373831775700935) internal successors, (218), 106 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 226 [2021-05-06 11:27:38,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:38,844 INFO L225 Difference]: With dead ends: 653 [2021-05-06 11:27:38,844 INFO L226 Difference]: Without dead ends: 639 [2021-05-06 11:27:38,845 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 4137.6ms TimeCoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2021-05-06 11:27:38,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-05-06 11:27:38,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 229. [2021-05-06 11:27:38,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.0089285714285714) internal successors, (226), 224 states have internal predecessors, (226), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:38,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2021-05-06 11:27:38,941 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 226 [2021-05-06 11:27:38,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:38,941 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2021-05-06 11:27:38,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 107 states, 107 states have (on average 2.0373831775700935) internal successors, (218), 106 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:38,941 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2021-05-06 11:27:38,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-05-06 11:27:38,942 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:38,942 INFO L523 BasicCegarLoop]: trace histogram [104, 104, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:38,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-05-06 11:27:38,942 INFO L428 AbstractCegarLoop]: === Iteration 108 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:38,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:38,942 INFO L82 PathProgramCache]: Analyzing trace with hash 810998015, now seen corresponding path program 104 times [2021-05-06 11:27:38,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:38,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398581170] [2021-05-06 11:27:38,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:38,946 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:38,946 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:38,946 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:43,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:43,238 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:43,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398581170] [2021-05-06 11:27:43,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1398581170] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:43,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:43,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2021-05-06 11:27:43,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032711116] [2021-05-06 11:27:43,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2021-05-06 11:27:43,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:43,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-05-06 11:27:43,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2021-05-06 11:27:43,240 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand has 108 states, 108 states have (on average 2.037037037037037) internal successors, (220), 107 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:45,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:45,587 INFO L93 Difference]: Finished difference Result 659 states and 764 transitions. [2021-05-06 11:27:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-05-06 11:27:45,587 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.037037037037037) internal successors, (220), 107 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 228 [2021-05-06 11:27:45,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:45,588 INFO L225 Difference]: With dead ends: 659 [2021-05-06 11:27:45,588 INFO L226 Difference]: Without dead ends: 645 [2021-05-06 11:27:45,589 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 4152.6ms TimeCoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2021-05-06 11:27:45,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-05-06 11:27:45,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 231. [2021-05-06 11:27:45,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.008849557522124) internal successors, (228), 226 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:45,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2021-05-06 11:27:45,677 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 228 [2021-05-06 11:27:45,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:45,678 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2021-05-06 11:27:45,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 108 states, 108 states have (on average 2.037037037037037) internal successors, (220), 107 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:45,678 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2021-05-06 11:27:45,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-05-06 11:27:45,678 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:45,678 INFO L523 BasicCegarLoop]: trace histogram [105, 105, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:45,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-05-06 11:27:45,678 INFO L428 AbstractCegarLoop]: === Iteration 109 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:45,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:45,679 INFO L82 PathProgramCache]: Analyzing trace with hash 217666593, now seen corresponding path program 105 times [2021-05-06 11:27:45,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:45,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717707718] [2021-05-06 11:27:45,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:45,684 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:45,684 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:45,685 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:49,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:49,998 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:49,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717707718] [2021-05-06 11:27:49,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [717707718] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:49,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:49,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2021-05-06 11:27:49,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405048394] [2021-05-06 11:27:49,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 109 states [2021-05-06 11:27:49,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:49,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-05-06 11:27:49,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2021-05-06 11:27:50,000 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand has 109 states, 109 states have (on average 2.036697247706422) internal successors, (222), 108 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:52,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:52,075 INFO L93 Difference]: Finished difference Result 665 states and 771 transitions. [2021-05-06 11:27:52,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-05-06 11:27:52,076 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.036697247706422) internal successors, (222), 108 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 230 [2021-05-06 11:27:52,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:52,077 INFO L225 Difference]: With dead ends: 665 [2021-05-06 11:27:52,077 INFO L226 Difference]: Without dead ends: 651 [2021-05-06 11:27:52,077 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 4222.2ms TimeCoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2021-05-06 11:27:52,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-05-06 11:27:52,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 233. [2021-05-06 11:27:52,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.0087719298245614) internal successors, (230), 228 states have internal predecessors, (230), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:52,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 234 transitions. [2021-05-06 11:27:52,158 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 234 transitions. Word has length 230 [2021-05-06 11:27:52,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:52,158 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 234 transitions. [2021-05-06 11:27:52,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 109 states, 109 states have (on average 2.036697247706422) internal successors, (222), 108 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:52,158 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 234 transitions. [2021-05-06 11:27:52,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-05-06 11:27:52,159 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:52,159 INFO L523 BasicCegarLoop]: trace histogram [106, 106, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:52,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-05-06 11:27:52,159 INFO L428 AbstractCegarLoop]: === Iteration 110 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:52,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:52,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1256820419, now seen corresponding path program 106 times [2021-05-06 11:27:52,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:52,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904758024] [2021-05-06 11:27:52,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:52,163 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:52,163 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:52,164 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:56,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:56,594 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:56,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904758024] [2021-05-06 11:27:56,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1904758024] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:56,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:56,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2021-05-06 11:27:56,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790949545] [2021-05-06 11:27:56,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-05-06 11:27:56,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:56,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-05-06 11:27:56,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2021-05-06 11:27:56,595 INFO L87 Difference]: Start difference. First operand 233 states and 234 transitions. Second operand has 110 states, 110 states have (on average 2.036363636363636) internal successors, (224), 109 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:58,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:58,348 INFO L93 Difference]: Finished difference Result 671 states and 778 transitions. [2021-05-06 11:27:58,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-05-06 11:27:58,348 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.036363636363636) internal successors, (224), 109 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 232 [2021-05-06 11:27:58,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:58,349 INFO L225 Difference]: With dead ends: 671 [2021-05-06 11:27:58,349 INFO L226 Difference]: Without dead ends: 657 [2021-05-06 11:27:58,350 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 4303.7ms TimeCoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2021-05-06 11:27:58,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-05-06 11:27:58,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 235. [2021-05-06 11:27:58,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.008695652173913) internal successors, (232), 230 states have internal predecessors, (232), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:58,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2021-05-06 11:27:58,434 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 232 [2021-05-06 11:27:58,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:58,434 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2021-05-06 11:27:58,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 110 states, 110 states have (on average 2.036363636363636) internal successors, (224), 109 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:58,435 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2021-05-06 11:27:58,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-05-06 11:27:58,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:58,435 INFO L523 BasicCegarLoop]: trace histogram [107, 107, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:58,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-05-06 11:27:58,435 INFO L428 AbstractCegarLoop]: === Iteration 111 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:58,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:58,436 INFO L82 PathProgramCache]: Analyzing trace with hash -843732763, now seen corresponding path program 107 times [2021-05-06 11:27:58,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:58,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267532298] [2021-05-06 11:27:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:58,439 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:58,439 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:58,439 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:02,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:02,937 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:02,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267532298] [2021-05-06 11:28:02,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1267532298] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:02,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:02,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2021-05-06 11:28:02,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609876201] [2021-05-06 11:28:02,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 111 states [2021-05-06 11:28:02,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:02,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-05-06 11:28:02,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2021-05-06 11:28:02,939 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand has 111 states, 111 states have (on average 2.036036036036036) internal successors, (226), 110 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:05,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:05,017 INFO L93 Difference]: Finished difference Result 677 states and 785 transitions. [2021-05-06 11:28:05,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-05-06 11:28:05,017 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.036036036036036) internal successors, (226), 110 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 234 [2021-05-06 11:28:05,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:05,019 INFO L225 Difference]: With dead ends: 677 [2021-05-06 11:28:05,019 INFO L226 Difference]: Without dead ends: 663 [2021-05-06 11:28:05,019 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 4396.4ms TimeCoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2021-05-06 11:28:05,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-05-06 11:28:05,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 237. [2021-05-06 11:28:05,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.0086206896551724) internal successors, (234), 232 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:05,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2021-05-06 11:28:05,114 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 234 [2021-05-06 11:28:05,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:05,115 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2021-05-06 11:28:05,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 111 states, 111 states have (on average 2.036036036036036) internal successors, (226), 110 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:05,115 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2021-05-06 11:28:05,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-05-06 11:28:05,115 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:05,115 INFO L523 BasicCegarLoop]: trace histogram [108, 108, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:05,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-05-06 11:28:05,115 INFO L428 AbstractCegarLoop]: === Iteration 112 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:05,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:05,116 INFO L82 PathProgramCache]: Analyzing trace with hash -840711545, now seen corresponding path program 108 times [2021-05-06 11:28:05,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:05,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145570904] [2021-05-06 11:28:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:05,119 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:05,119 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:05,119 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:09,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:09,689 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:09,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145570904] [2021-05-06 11:28:09,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2145570904] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:09,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:09,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2021-05-06 11:28:09,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699692926] [2021-05-06 11:28:09,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 112 states [2021-05-06 11:28:09,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:09,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-05-06 11:28:09,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2021-05-06 11:28:09,691 INFO L87 Difference]: Start difference. First operand 237 states and 238 transitions. Second operand has 112 states, 112 states have (on average 2.0357142857142856) internal successors, (228), 111 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:12,170 INFO L93 Difference]: Finished difference Result 683 states and 792 transitions. [2021-05-06 11:28:12,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-05-06 11:28:12,170 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0357142857142856) internal successors, (228), 111 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 236 [2021-05-06 11:28:12,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:12,171 INFO L225 Difference]: With dead ends: 683 [2021-05-06 11:28:12,171 INFO L226 Difference]: Without dead ends: 669 [2021-05-06 11:28:12,172 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 4475.6ms TimeCoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2021-05-06 11:28:12,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-05-06 11:28:12,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 239. [2021-05-06 11:28:12,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.0085470085470085) internal successors, (236), 234 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:12,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2021-05-06 11:28:12,259 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 236 [2021-05-06 11:28:12,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:12,259 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2021-05-06 11:28:12,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 112 states, 112 states have (on average 2.0357142857142856) internal successors, (228), 111 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:12,260 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2021-05-06 11:28:12,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-05-06 11:28:12,260 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:12,261 INFO L523 BasicCegarLoop]: trace histogram [109, 109, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:12,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-05-06 11:28:12,261 INFO L428 AbstractCegarLoop]: === Iteration 113 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:12,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:12,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2062678953, now seen corresponding path program 109 times [2021-05-06 11:28:12,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:12,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389947516] [2021-05-06 11:28:12,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:12,275 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:12,275 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:12,276 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:17,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:17,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:17,063 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:17,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389947516] [2021-05-06 11:28:17,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [389947516] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:17,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:17,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2021-05-06 11:28:17,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570715707] [2021-05-06 11:28:17,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 113 states [2021-05-06 11:28:17,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:17,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-05-06 11:28:17,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2021-05-06 11:28:17,065 INFO L87 Difference]: Start difference. First operand 239 states and 240 transitions. Second operand has 113 states, 113 states have (on average 2.0353982300884956) internal successors, (230), 112 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:19,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:19,197 INFO L93 Difference]: Finished difference Result 689 states and 799 transitions. [2021-05-06 11:28:19,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-05-06 11:28:19,198 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0353982300884956) internal successors, (230), 112 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 238 [2021-05-06 11:28:19,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:19,199 INFO L225 Difference]: With dead ends: 689 [2021-05-06 11:28:19,199 INFO L226 Difference]: Without dead ends: 675 [2021-05-06 11:28:19,199 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 4666.4ms TimeCoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2021-05-06 11:28:19,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-05-06 11:28:19,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 241. [2021-05-06 11:28:19,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0084745762711864) internal successors, (238), 236 states have internal predecessors, (238), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:19,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2021-05-06 11:28:19,289 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 238 [2021-05-06 11:28:19,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:19,290 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2021-05-06 11:28:19,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 113 states, 113 states have (on average 2.0353982300884956) internal successors, (230), 112 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:19,290 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2021-05-06 11:28:19,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-05-06 11:28:19,290 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:19,290 INFO L523 BasicCegarLoop]: trace histogram [110, 110, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:19,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-05-06 11:28:19,290 INFO L428 AbstractCegarLoop]: === Iteration 114 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:19,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:19,291 INFO L82 PathProgramCache]: Analyzing trace with hash 492205131, now seen corresponding path program 110 times [2021-05-06 11:28:19,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:19,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038000255] [2021-05-06 11:28:19,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:19,295 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:19,295 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:19,296 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:24,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:24,053 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:24,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038000255] [2021-05-06 11:28:24,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2038000255] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:24,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:24,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2021-05-06 11:28:24,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231601433] [2021-05-06 11:28:24,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 114 states [2021-05-06 11:28:24,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:24,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-05-06 11:28:24,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2021-05-06 11:28:24,055 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand has 114 states, 114 states have (on average 2.0350877192982457) internal successors, (232), 113 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:26,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:26,194 INFO L93 Difference]: Finished difference Result 695 states and 806 transitions. [2021-05-06 11:28:26,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-05-06 11:28:26,194 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.0350877192982457) internal successors, (232), 113 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 240 [2021-05-06 11:28:26,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:26,205 INFO L225 Difference]: With dead ends: 695 [2021-05-06 11:28:26,205 INFO L226 Difference]: Without dead ends: 681 [2021-05-06 11:28:26,206 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 4646.9ms TimeCoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2021-05-06 11:28:26,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-05-06 11:28:26,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 243. [2021-05-06 11:28:26,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.0084033613445378) internal successors, (240), 238 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:26,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2021-05-06 11:28:26,298 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 240 [2021-05-06 11:28:26,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:26,299 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2021-05-06 11:28:26,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 114 states, 114 states have (on average 2.0350877192982457) internal successors, (232), 113 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:26,299 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2021-05-06 11:28:26,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-05-06 11:28:26,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:26,299 INFO L523 BasicCegarLoop]: trace histogram [111, 111, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:26,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-05-06 11:28:26,300 INFO L428 AbstractCegarLoop]: === Iteration 115 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:26,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:26,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1199616915, now seen corresponding path program 111 times [2021-05-06 11:28:26,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:26,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694277438] [2021-05-06 11:28:26,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:26,303 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:26,303 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:26,304 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:31,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:31,094 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:31,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694277438] [2021-05-06 11:28:31,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [694277438] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:31,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:31,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2021-05-06 11:28:31,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661102065] [2021-05-06 11:28:31,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 115 states [2021-05-06 11:28:31,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:31,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-05-06 11:28:31,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2021-05-06 11:28:31,096 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand has 115 states, 115 states have (on average 2.034782608695652) internal successors, (234), 114 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:33,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:33,751 INFO L93 Difference]: Finished difference Result 701 states and 813 transitions. [2021-05-06 11:28:33,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-05-06 11:28:33,752 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.034782608695652) internal successors, (234), 114 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 242 [2021-05-06 11:28:33,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:33,753 INFO L225 Difference]: With dead ends: 701 [2021-05-06 11:28:33,753 INFO L226 Difference]: Without dead ends: 687 [2021-05-06 11:28:33,753 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 4693.7ms TimeCoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2021-05-06 11:28:33,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-05-06 11:28:33,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 245. [2021-05-06 11:28:33,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.0083333333333333) internal successors, (242), 240 states have internal predecessors, (242), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:33,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 246 transitions. [2021-05-06 11:28:33,847 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 246 transitions. Word has length 242 [2021-05-06 11:28:33,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:33,848 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 246 transitions. [2021-05-06 11:28:33,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 115 states, 115 states have (on average 2.034782608695652) internal successors, (234), 114 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:33,848 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 246 transitions. [2021-05-06 11:28:33,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-05-06 11:28:33,849 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:33,849 INFO L523 BasicCegarLoop]: trace histogram [112, 112, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:33,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-05-06 11:28:33,849 INFO L428 AbstractCegarLoop]: === Iteration 116 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:33,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:33,849 INFO L82 PathProgramCache]: Analyzing trace with hash 752002063, now seen corresponding path program 112 times [2021-05-06 11:28:33,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:33,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896830240] [2021-05-06 11:28:33,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:33,856 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:33,856 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:33,857 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:38,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:38,721 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:38,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896830240] [2021-05-06 11:28:38,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1896830240] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:38,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:38,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2021-05-06 11:28:38,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246712284] [2021-05-06 11:28:38,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 116 states [2021-05-06 11:28:38,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:38,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-05-06 11:28:38,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2021-05-06 11:28:38,723 INFO L87 Difference]: Start difference. First operand 245 states and 246 transitions. Second operand has 116 states, 116 states have (on average 2.0344827586206895) internal successors, (236), 115 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:41,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:41,623 INFO L93 Difference]: Finished difference Result 707 states and 820 transitions. [2021-05-06 11:28:41,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-05-06 11:28:41,624 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0344827586206895) internal successors, (236), 115 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 244 [2021-05-06 11:28:41,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:41,625 INFO L225 Difference]: With dead ends: 707 [2021-05-06 11:28:41,625 INFO L226 Difference]: Without dead ends: 693 [2021-05-06 11:28:41,625 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 4770.1ms TimeCoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2021-05-06 11:28:41,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-05-06 11:28:41,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 247. [2021-05-06 11:28:41,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.0082644628099173) internal successors, (244), 242 states have internal predecessors, (244), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:41,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions. [2021-05-06 11:28:41,724 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 244 [2021-05-06 11:28:41,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:41,724 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 248 transitions. [2021-05-06 11:28:41,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 116 states, 116 states have (on average 2.0344827586206895) internal successors, (236), 115 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:41,724 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions. [2021-05-06 11:28:41,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-05-06 11:28:41,725 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:41,725 INFO L523 BasicCegarLoop]: trace histogram [113, 113, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:41,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-05-06 11:28:41,725 INFO L428 AbstractCegarLoop]: === Iteration 117 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:41,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:41,725 INFO L82 PathProgramCache]: Analyzing trace with hash -642868431, now seen corresponding path program 113 times [2021-05-06 11:28:41,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:41,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310020493] [2021-05-06 11:28:41,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:41,728 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:41,728 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:41,729 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:46,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:46,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:46,698 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:46,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310020493] [2021-05-06 11:28:46,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [310020493] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:46,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:46,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2021-05-06 11:28:46,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026093465] [2021-05-06 11:28:46,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 117 states [2021-05-06 11:28:46,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:46,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-05-06 11:28:46,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2021-05-06 11:28:46,701 INFO L87 Difference]: Start difference. First operand 247 states and 248 transitions. Second operand has 117 states, 117 states have (on average 2.034188034188034) internal successors, (238), 116 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:49,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:49,110 INFO L93 Difference]: Finished difference Result 713 states and 827 transitions. [2021-05-06 11:28:49,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-05-06 11:28:49,111 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.034188034188034) internal successors, (238), 116 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 246 [2021-05-06 11:28:49,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:49,112 INFO L225 Difference]: With dead ends: 713 [2021-05-06 11:28:49,112 INFO L226 Difference]: Without dead ends: 699 [2021-05-06 11:28:49,113 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 4868.8ms TimeCoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2021-05-06 11:28:49,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-05-06 11:28:49,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 249. [2021-05-06 11:28:49,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.0081967213114753) internal successors, (246), 244 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:49,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2021-05-06 11:28:49,212 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 246 [2021-05-06 11:28:49,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:49,212 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2021-05-06 11:28:49,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 117 states, 117 states have (on average 2.034188034188034) internal successors, (238), 116 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:49,212 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2021-05-06 11:28:49,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-05-06 11:28:49,213 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:49,213 INFO L523 BasicCegarLoop]: trace histogram [114, 114, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:49,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-05-06 11:28:49,214 INFO L428 AbstractCegarLoop]: === Iteration 118 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:49,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:49,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1083616813, now seen corresponding path program 114 times [2021-05-06 11:28:49,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:49,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903775578] [2021-05-06 11:28:49,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:49,231 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:49,232 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:49,232 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:54,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:54,443 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:54,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903775578] [2021-05-06 11:28:54,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [903775578] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:54,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:54,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2021-05-06 11:28:54,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902350611] [2021-05-06 11:28:54,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 118 states [2021-05-06 11:28:54,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:54,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-05-06 11:28:54,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2021-05-06 11:28:54,445 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand has 118 states, 118 states have (on average 2.0338983050847457) internal successors, (240), 117 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:56,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:56,696 INFO L93 Difference]: Finished difference Result 719 states and 834 transitions. [2021-05-06 11:28:56,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-06 11:28:56,696 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0338983050847457) internal successors, (240), 117 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 248 [2021-05-06 11:28:56,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:56,697 INFO L225 Difference]: With dead ends: 719 [2021-05-06 11:28:56,698 INFO L226 Difference]: Without dead ends: 705 [2021-05-06 11:28:56,698 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 5066.3ms TimeCoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2021-05-06 11:28:56,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-05-06 11:28:56,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 251. [2021-05-06 11:28:56,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.008130081300813) internal successors, (248), 246 states have internal predecessors, (248), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:56,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 252 transitions. [2021-05-06 11:28:56,808 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 252 transitions. Word has length 248 [2021-05-06 11:28:56,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:56,808 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 252 transitions. [2021-05-06 11:28:56,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 118 states, 118 states have (on average 2.0338983050847457) internal successors, (240), 117 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 252 transitions. [2021-05-06 11:28:56,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-05-06 11:28:56,809 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:56,809 INFO L523 BasicCegarLoop]: trace histogram [115, 115, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:56,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-05-06 11:28:56,809 INFO L428 AbstractCegarLoop]: === Iteration 119 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:56,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:56,810 INFO L82 PathProgramCache]: Analyzing trace with hash 558950389, now seen corresponding path program 115 times [2021-05-06 11:28:56,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:56,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479611056] [2021-05-06 11:28:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:56,813 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:56,813 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:56,814 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:01,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:29:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:29:01,969 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:29:01,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479611056] [2021-05-06 11:29:01,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1479611056] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:29:01,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:29:01,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2021-05-06 11:29:01,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322094062] [2021-05-06 11:29:01,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 119 states [2021-05-06 11:29:01,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:29:01,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-05-06 11:29:01,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2021-05-06 11:29:01,971 INFO L87 Difference]: Start difference. First operand 251 states and 252 transitions. Second operand has 119 states, 119 states have (on average 2.033613445378151) internal successors, (242), 118 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:04,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:29:04,691 INFO L93 Difference]: Finished difference Result 725 states and 841 transitions. [2021-05-06 11:29:04,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-05-06 11:29:04,692 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.033613445378151) internal successors, (242), 118 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 250 [2021-05-06 11:29:04,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:29:04,693 INFO L225 Difference]: With dead ends: 725 [2021-05-06 11:29:04,693 INFO L226 Difference]: Without dead ends: 711 [2021-05-06 11:29:04,694 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 5034.2ms TimeCoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2021-05-06 11:29:04,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-05-06 11:29:04,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 253. [2021-05-06 11:29:04,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.0080645161290323) internal successors, (250), 248 states have internal predecessors, (250), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:04,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2021-05-06 11:29:04,798 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 250 [2021-05-06 11:29:04,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:29:04,798 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2021-05-06 11:29:04,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 119 states, 119 states have (on average 2.033613445378151) internal successors, (242), 118 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:04,798 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2021-05-06 11:29:04,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-05-06 11:29:04,799 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:29:04,799 INFO L523 BasicCegarLoop]: trace histogram [116, 116, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:29:04,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-05-06 11:29:04,799 INFO L428 AbstractCegarLoop]: === Iteration 120 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:29:04,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:29:04,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1481933417, now seen corresponding path program 116 times [2021-05-06 11:29:04,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:29:04,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328809104] [2021-05-06 11:29:04,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:29:04,815 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:29:04,816 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:29:04,816 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:29:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:10,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:29:10,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:29:10,108 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:29:10,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328809104] [2021-05-06 11:29:10,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [328809104] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:29:10,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:29:10,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2021-05-06 11:29:10,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381279966] [2021-05-06 11:29:10,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 120 states [2021-05-06 11:29:10,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:29:10,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-05-06 11:29:10,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2021-05-06 11:29:10,111 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand has 120 states, 120 states have (on average 2.033333333333333) internal successors, (244), 119 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:13,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:29:13,342 INFO L93 Difference]: Finished difference Result 731 states and 848 transitions. [2021-05-06 11:29:13,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-05-06 11:29:13,342 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.033333333333333) internal successors, (244), 119 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 252 [2021-05-06 11:29:13,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:29:13,343 INFO L225 Difference]: With dead ends: 731 [2021-05-06 11:29:13,343 INFO L226 Difference]: Without dead ends: 717 [2021-05-06 11:29:13,344 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 5160.7ms TimeCoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2021-05-06 11:29:13,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-05-06 11:29:13,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 255. [2021-05-06 11:29:13,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.008) internal successors, (252), 250 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:13,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 256 transitions. [2021-05-06 11:29:13,452 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 256 transitions. Word has length 252 [2021-05-06 11:29:13,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:29:13,452 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 256 transitions. [2021-05-06 11:29:13,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 120 states, 120 states have (on average 2.033333333333333) internal successors, (244), 119 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:13,452 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 256 transitions. [2021-05-06 11:29:13,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-05-06 11:29:13,453 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:29:13,453 INFO L523 BasicCegarLoop]: trace histogram [117, 117, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:29:13,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-05-06 11:29:13,453 INFO L428 AbstractCegarLoop]: === Iteration 121 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:29:13,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:29:13,453 INFO L82 PathProgramCache]: Analyzing trace with hash 28783289, now seen corresponding path program 117 times [2021-05-06 11:29:13,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:29:13,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909032253] [2021-05-06 11:29:13,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:29:13,457 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:29:13,457 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:29:13,457 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:29:13,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:18,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:29:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:29:18,786 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:29:18,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909032253] [2021-05-06 11:29:18,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [909032253] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:29:18,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:29:18,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2021-05-06 11:29:18,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854353191] [2021-05-06 11:29:18,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 121 states [2021-05-06 11:29:18,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:29:18,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-05-06 11:29:18,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2021-05-06 11:29:18,787 INFO L87 Difference]: Start difference. First operand 255 states and 256 transitions. Second operand has 121 states, 121 states have (on average 2.0330578512396693) internal successors, (246), 120 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:21,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:29:21,402 INFO L93 Difference]: Finished difference Result 737 states and 855 transitions. [2021-05-06 11:29:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-05-06 11:29:21,403 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.0330578512396693) internal successors, (246), 120 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 254 [2021-05-06 11:29:21,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:29:21,404 INFO L225 Difference]: With dead ends: 737 [2021-05-06 11:29:21,404 INFO L226 Difference]: Without dead ends: 723 [2021-05-06 11:29:21,405 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 5212.4ms TimeCoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2021-05-06 11:29:21,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-05-06 11:29:21,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 257. [2021-05-06 11:29:21,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.007936507936508) internal successors, (254), 252 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:21,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 258 transitions. [2021-05-06 11:29:21,533 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 258 transitions. Word has length 254 [2021-05-06 11:29:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:29:21,533 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 258 transitions. [2021-05-06 11:29:21,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 121 states, 121 states have (on average 2.0330578512396693) internal successors, (246), 120 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:21,534 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 258 transitions. [2021-05-06 11:29:21,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-05-06 11:29:21,534 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:29:21,534 INFO L523 BasicCegarLoop]: trace histogram [118, 118, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:29:21,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-05-06 11:29:21,534 INFO L428 AbstractCegarLoop]: === Iteration 122 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:29:21,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:29:21,535 INFO L82 PathProgramCache]: Analyzing trace with hash 128591707, now seen corresponding path program 118 times [2021-05-06 11:29:21,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:29:21,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241443169] [2021-05-06 11:29:21,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:29:21,538 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:29:21,538 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:29:21,538 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:29:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:27,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:29:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:29:27,037 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:29:27,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241443169] [2021-05-06 11:29:27,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1241443169] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:29:27,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:29:27,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2021-05-06 11:29:27,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362922804] [2021-05-06 11:29:27,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 122 states [2021-05-06 11:29:27,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:29:27,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-05-06 11:29:27,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2021-05-06 11:29:27,039 INFO L87 Difference]: Start difference. First operand 257 states and 258 transitions. Second operand has 122 states, 122 states have (on average 2.0327868852459017) internal successors, (248), 121 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:30,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:29:30,399 INFO L93 Difference]: Finished difference Result 743 states and 862 transitions. [2021-05-06 11:29:30,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-06 11:29:30,400 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0327868852459017) internal successors, (248), 121 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 256 [2021-05-06 11:29:30,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:29:30,401 INFO L225 Difference]: With dead ends: 743 [2021-05-06 11:29:30,401 INFO L226 Difference]: Without dead ends: 729 [2021-05-06 11:29:30,401 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 5393.4ms TimeCoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2021-05-06 11:29:30,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-05-06 11:29:30,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 259. [2021-05-06 11:29:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.0078740157480315) internal successors, (256), 254 states have internal predecessors, (256), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:30,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2021-05-06 11:29:30,529 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 256 [2021-05-06 11:29:30,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:29:30,529 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2021-05-06 11:29:30,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 122 states, 122 states have (on average 2.0327868852459017) internal successors, (248), 121 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:30,529 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2021-05-06 11:29:30,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-05-06 11:29:30,530 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:29:30,530 INFO L523 BasicCegarLoop]: trace histogram [119, 119, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:29:30,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-05-06 11:29:30,530 INFO L428 AbstractCegarLoop]: === Iteration 123 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:29:30,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:29:30,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1555200893, now seen corresponding path program 119 times [2021-05-06 11:29:30,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:29:30,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240531666] [2021-05-06 11:29:30,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:29:30,537 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:29:30,537 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:29:30,538 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:29:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:36,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:29:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:29:36,114 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:29:36,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240531666] [2021-05-06 11:29:36,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1240531666] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:29:36,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:29:36,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2021-05-06 11:29:36,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401007] [2021-05-06 11:29:36,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 123 states [2021-05-06 11:29:36,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:29:36,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-05-06 11:29:36,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2021-05-06 11:29:36,117 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand has 123 states, 123 states have (on average 2.032520325203252) internal successors, (250), 122 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:38,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:29:38,259 INFO L93 Difference]: Finished difference Result 749 states and 869 transitions. [2021-05-06 11:29:38,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-05-06 11:29:38,259 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.032520325203252) internal successors, (250), 122 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 258 [2021-05-06 11:29:38,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:29:38,260 INFO L225 Difference]: With dead ends: 749 [2021-05-06 11:29:38,260 INFO L226 Difference]: Without dead ends: 735 [2021-05-06 11:29:38,261 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 5443.3ms TimeCoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2021-05-06 11:29:38,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2021-05-06 11:29:38,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 261. [2021-05-06 11:29:38,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.0078125) internal successors, (258), 256 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:38,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 262 transitions. [2021-05-06 11:29:38,385 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 262 transitions. Word has length 258 [2021-05-06 11:29:38,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:29:38,385 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 262 transitions. [2021-05-06 11:29:38,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 123 states, 123 states have (on average 2.032520325203252) internal successors, (250), 122 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:38,385 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 262 transitions. [2021-05-06 11:29:38,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-05-06 11:29:38,386 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:29:38,386 INFO L523 BasicCegarLoop]: trace histogram [120, 120, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:29:38,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-05-06 11:29:38,386 INFO L428 AbstractCegarLoop]: === Iteration 124 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:29:38,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:29:38,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1862906081, now seen corresponding path program 120 times [2021-05-06 11:29:38,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:29:38,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569882782] [2021-05-06 11:29:38,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:29:38,389 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:29:38,389 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:29:38,390 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:29:38,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:43,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:29:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:29:43,985 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:29:43,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569882782] [2021-05-06 11:29:43,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1569882782] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:29:43,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:29:43,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2021-05-06 11:29:43,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747724455] [2021-05-06 11:29:43,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 124 states [2021-05-06 11:29:43,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:29:43,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-05-06 11:29:43,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2021-05-06 11:29:43,987 INFO L87 Difference]: Start difference. First operand 261 states and 262 transitions. Second operand has 124 states, 124 states have (on average 2.032258064516129) internal successors, (252), 123 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:46,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:29:46,970 INFO L93 Difference]: Finished difference Result 755 states and 876 transitions. [2021-05-06 11:29:46,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-05-06 11:29:46,970 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.032258064516129) internal successors, (252), 123 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 260 [2021-05-06 11:29:46,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:29:46,972 INFO L225 Difference]: With dead ends: 755 [2021-05-06 11:29:46,972 INFO L226 Difference]: Without dead ends: 741 [2021-05-06 11:29:46,972 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 5483.6ms TimeCoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2021-05-06 11:29:46,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-05-06 11:29:47,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 263. [2021-05-06 11:29:47,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.0077519379844961) internal successors, (260), 258 states have internal predecessors, (260), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:47,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 264 transitions. [2021-05-06 11:29:47,113 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 264 transitions. Word has length 260 [2021-05-06 11:29:47,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:29:47,113 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 264 transitions. [2021-05-06 11:29:47,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 124 states, 124 states have (on average 2.032258064516129) internal successors, (252), 123 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:47,114 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 264 transitions. [2021-05-06 11:29:47,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-05-06 11:29:47,114 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:29:47,114 INFO L523 BasicCegarLoop]: trace histogram [121, 121, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:29:47,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-05-06 11:29:47,114 INFO L428 AbstractCegarLoop]: === Iteration 125 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:29:47,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:29:47,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1013726655, now seen corresponding path program 121 times [2021-05-06 11:29:47,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:29:47,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941019166] [2021-05-06 11:29:47,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:29:47,118 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:29:47,119 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:29:47,119 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:29:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:52,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:29:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:52,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:29:52,814 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:29:52,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941019166] [2021-05-06 11:29:52,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [941019166] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:29:52,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:29:52,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2021-05-06 11:29:52,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840586928] [2021-05-06 11:29:52,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 125 states [2021-05-06 11:29:52,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:29:52,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-05-06 11:29:52,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2021-05-06 11:29:52,816 INFO L87 Difference]: Start difference. First operand 263 states and 264 transitions. Second operand has 125 states, 125 states have (on average 2.032) internal successors, (254), 124 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:55,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:29:55,373 INFO L93 Difference]: Finished difference Result 761 states and 883 transitions. [2021-05-06 11:29:55,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-05-06 11:29:55,373 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.032) internal successors, (254), 124 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 262 [2021-05-06 11:29:55,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:29:55,375 INFO L225 Difference]: With dead ends: 761 [2021-05-06 11:29:55,375 INFO L226 Difference]: Without dead ends: 747 [2021-05-06 11:29:55,375 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 5590.3ms TimeCoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2021-05-06 11:29:55,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2021-05-06 11:29:55,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 265. [2021-05-06 11:29:55,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.0076923076923077) internal successors, (262), 260 states have internal predecessors, (262), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:55,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2021-05-06 11:29:55,549 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 262 [2021-05-06 11:29:55,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:29:55,549 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2021-05-06 11:29:55,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 125 states, 125 states have (on average 2.032) internal successors, (254), 124 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:55,549 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2021-05-06 11:29:55,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-05-06 11:29:55,550 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:29:55,550 INFO L523 BasicCegarLoop]: trace histogram [122, 122, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:29:55,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-05-06 11:29:55,550 INFO L428 AbstractCegarLoop]: === Iteration 126 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:29:55,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:29:55,551 INFO L82 PathProgramCache]: Analyzing trace with hash -996084509, now seen corresponding path program 122 times [2021-05-06 11:29:55,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:29:55,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287250546] [2021-05-06 11:29:55,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:29:55,554 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:29:55,554 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:29:55,554 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:29:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:01,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:30:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:30:01,301 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:30:01,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287250546] [2021-05-06 11:30:01,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1287250546] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:30:01,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:30:01,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2021-05-06 11:30:01,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415734815] [2021-05-06 11:30:01,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 126 states [2021-05-06 11:30:01,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:30:01,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-05-06 11:30:01,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2021-05-06 11:30:01,303 INFO L87 Difference]: Start difference. First operand 265 states and 266 transitions. Second operand has 126 states, 126 states have (on average 2.0317460317460316) internal successors, (256), 125 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:04,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:30:04,955 INFO L93 Difference]: Finished difference Result 767 states and 890 transitions. [2021-05-06 11:30:04,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-05-06 11:30:04,955 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0317460317460316) internal successors, (256), 125 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 264 [2021-05-06 11:30:04,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:30:04,957 INFO L225 Difference]: With dead ends: 767 [2021-05-06 11:30:04,957 INFO L226 Difference]: Without dead ends: 753 [2021-05-06 11:30:04,958 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 5638.2ms TimeCoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2021-05-06 11:30:04,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-05-06 11:30:05,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 267. [2021-05-06 11:30:05,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.0076335877862594) internal successors, (264), 262 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:05,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2021-05-06 11:30:05,122 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 264 [2021-05-06 11:30:05,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:30:05,122 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2021-05-06 11:30:05,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 126 states, 126 states have (on average 2.0317460317460316) internal successors, (256), 125 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:05,122 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2021-05-06 11:30:05,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-05-06 11:30:05,123 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:30:05,123 INFO L523 BasicCegarLoop]: trace histogram [123, 123, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:30:05,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-05-06 11:30:05,123 INFO L428 AbstractCegarLoop]: === Iteration 127 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:30:05,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:30:05,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1221851387, now seen corresponding path program 123 times [2021-05-06 11:30:05,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:30:05,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433354293] [2021-05-06 11:30:05,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:30:05,127 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:30:05,127 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:30:05,128 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:30:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:11,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:30:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:30:11,022 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:30:11,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433354293] [2021-05-06 11:30:11,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [433354293] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:30:11,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:30:11,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2021-05-06 11:30:11,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181194973] [2021-05-06 11:30:11,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 127 states [2021-05-06 11:30:11,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:30:11,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-05-06 11:30:11,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2021-05-06 11:30:11,024 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand has 127 states, 127 states have (on average 2.031496062992126) internal successors, (258), 126 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:13,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:30:13,399 INFO L93 Difference]: Finished difference Result 773 states and 897 transitions. [2021-05-06 11:30:13,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-05-06 11:30:13,400 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.031496062992126) internal successors, (258), 126 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 266 [2021-05-06 11:30:13,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:30:13,401 INFO L225 Difference]: With dead ends: 773 [2021-05-06 11:30:13,401 INFO L226 Difference]: Without dead ends: 759 [2021-05-06 11:30:13,402 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 5777.6ms TimeCoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2021-05-06 11:30:13,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-05-06 11:30:13,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 269. [2021-05-06 11:30:13,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.0075757575757576) internal successors, (266), 264 states have internal predecessors, (266), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:13,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 270 transitions. [2021-05-06 11:30:13,543 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 270 transitions. Word has length 266 [2021-05-06 11:30:13,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:30:13,544 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 270 transitions. [2021-05-06 11:30:13,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 127 states, 127 states have (on average 2.031496062992126) internal successors, (258), 126 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:13,544 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 270 transitions. [2021-05-06 11:30:13,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-05-06 11:30:13,545 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:30:13,545 INFO L523 BasicCegarLoop]: trace histogram [124, 124, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:30:13,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-05-06 11:30:13,545 INFO L428 AbstractCegarLoop]: === Iteration 128 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:30:13,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:30:13,545 INFO L82 PathProgramCache]: Analyzing trace with hash 859510951, now seen corresponding path program 124 times [2021-05-06 11:30:13,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:30:13,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314303420] [2021-05-06 11:30:13,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:30:13,551 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:30:13,551 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:30:13,552 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:30:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:19,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:30:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:30:19,593 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:30:19,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314303420] [2021-05-06 11:30:19,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [314303420] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:30:19,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:30:19,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2021-05-06 11:30:19,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789510143] [2021-05-06 11:30:19,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 128 states [2021-05-06 11:30:19,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:30:19,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-05-06 11:30:19,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2021-05-06 11:30:19,596 INFO L87 Difference]: Start difference. First operand 269 states and 270 transitions. Second operand has 128 states, 128 states have (on average 2.03125) internal successors, (260), 127 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:22,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:30:22,981 INFO L93 Difference]: Finished difference Result 779 states and 904 transitions. [2021-05-06 11:30:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-05-06 11:30:22,981 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.03125) internal successors, (260), 127 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 268 [2021-05-06 11:30:22,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:30:22,983 INFO L225 Difference]: With dead ends: 779 [2021-05-06 11:30:22,983 INFO L226 Difference]: Without dead ends: 765 [2021-05-06 11:30:22,984 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 5914.5ms TimeCoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2021-05-06 11:30:22,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-05-06 11:30:23,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 271. [2021-05-06 11:30:23,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.0075187969924813) internal successors, (268), 266 states have internal predecessors, (268), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:23,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2021-05-06 11:30:23,113 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 268 [2021-05-06 11:30:23,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:30:23,113 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2021-05-06 11:30:23,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 128 states, 128 states have (on average 2.03125) internal successors, (260), 127 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:23,113 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2021-05-06 11:30:23,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-05-06 11:30:23,114 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:30:23,114 INFO L523 BasicCegarLoop]: trace histogram [125, 125, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:30:23,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-05-06 11:30:23,114 INFO L428 AbstractCegarLoop]: === Iteration 129 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:30:23,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:30:23,115 INFO L82 PathProgramCache]: Analyzing trace with hash -406042167, now seen corresponding path program 125 times [2021-05-06 11:30:23,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:30:23,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178470391] [2021-05-06 11:30:23,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:30:23,118 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:30:23,118 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:30:23,118 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:30:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:29,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:30:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:30:29,175 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:30:29,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178470391] [2021-05-06 11:30:29,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [178470391] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:30:29,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:30:29,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2021-05-06 11:30:29,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302728414] [2021-05-06 11:30:29,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 129 states [2021-05-06 11:30:29,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:30:29,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-05-06 11:30:29,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2021-05-06 11:30:29,177 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand has 129 states, 129 states have (on average 2.0310077519379846) internal successors, (262), 128 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:33,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:30:33,307 INFO L93 Difference]: Finished difference Result 785 states and 911 transitions. [2021-05-06 11:30:33,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-05-06 11:30:33,309 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0310077519379846) internal successors, (262), 128 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 270 [2021-05-06 11:30:33,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:30:33,311 INFO L225 Difference]: With dead ends: 785 [2021-05-06 11:30:33,311 INFO L226 Difference]: Without dead ends: 771 [2021-05-06 11:30:33,311 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 5936.8ms TimeCoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2021-05-06 11:30:33,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-05-06 11:30:33,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 273. [2021-05-06 11:30:33,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 268 states have (on average 1.007462686567164) internal successors, (270), 268 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:33,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 274 transitions. [2021-05-06 11:30:33,456 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 274 transitions. Word has length 270 [2021-05-06 11:30:33,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:30:33,456 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 274 transitions. [2021-05-06 11:30:33,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 129 states, 129 states have (on average 2.0310077519379846) internal successors, (262), 128 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:33,456 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 274 transitions. [2021-05-06 11:30:33,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-05-06 11:30:33,457 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:30:33,457 INFO L523 BasicCegarLoop]: trace histogram [126, 126, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:30:33,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-05-06 11:30:33,457 INFO L428 AbstractCegarLoop]: === Iteration 130 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:30:33,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:30:33,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1126843797, now seen corresponding path program 126 times [2021-05-06 11:30:33,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:30:33,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078166943] [2021-05-06 11:30:33,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:30:33,461 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:30:33,461 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:30:33,462 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:30:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:39,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:30:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:39,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:30:39,634 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:30:39,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078166943] [2021-05-06 11:30:39,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2078166943] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:30:39,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:30:39,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2021-05-06 11:30:39,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099160930] [2021-05-06 11:30:39,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 130 states [2021-05-06 11:30:39,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:30:39,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-05-06 11:30:39,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2021-05-06 11:30:39,636 INFO L87 Difference]: Start difference. First operand 273 states and 274 transitions. Second operand has 130 states, 130 states have (on average 2.0307692307692307) internal successors, (264), 129 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:42,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:30:42,678 INFO L93 Difference]: Finished difference Result 791 states and 918 transitions. [2021-05-06 11:30:42,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-05-06 11:30:42,679 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.0307692307692307) internal successors, (264), 129 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 272 [2021-05-06 11:30:42,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:30:42,680 INFO L225 Difference]: With dead ends: 791 [2021-05-06 11:30:42,680 INFO L226 Difference]: Without dead ends: 777 [2021-05-06 11:30:42,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 6034.0ms TimeCoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2021-05-06 11:30:42,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-05-06 11:30:42,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 275. [2021-05-06 11:30:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.0074074074074073) internal successors, (272), 270 states have internal predecessors, (272), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2021-05-06 11:30:42,865 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 272 [2021-05-06 11:30:42,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:30:42,865 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2021-05-06 11:30:42,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 130 states, 130 states have (on average 2.0307692307692307) internal successors, (264), 129 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:42,865 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2021-05-06 11:30:42,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-05-06 11:30:42,866 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:30:42,866 INFO L523 BasicCegarLoop]: trace histogram [127, 127, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:30:42,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-05-06 11:30:42,866 INFO L428 AbstractCegarLoop]: === Iteration 131 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:30:42,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:30:42,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1967491725, now seen corresponding path program 127 times [2021-05-06 11:30:42,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:30:42,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384774622] [2021-05-06 11:30:42,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:30:42,874 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:30:42,874 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:30:42,875 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:30:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:49,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:30:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:30:49,189 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:30:49,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384774622] [2021-05-06 11:30:49,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1384774622] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:30:49,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:30:49,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2021-05-06 11:30:49,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413295840] [2021-05-06 11:30:49,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 131 states [2021-05-06 11:30:49,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:30:49,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-05-06 11:30:49,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2021-05-06 11:30:49,191 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand has 131 states, 131 states have (on average 2.030534351145038) internal successors, (266), 130 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:51,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:30:51,876 INFO L93 Difference]: Finished difference Result 797 states and 925 transitions. [2021-05-06 11:30:51,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-05-06 11:30:51,876 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.030534351145038) internal successors, (266), 130 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 274 [2021-05-06 11:30:51,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:30:51,877 INFO L225 Difference]: With dead ends: 797 [2021-05-06 11:30:51,877 INFO L226 Difference]: Without dead ends: 783 [2021-05-06 11:30:51,878 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 6180.0ms TimeCoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2021-05-06 11:30:51,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-05-06 11:30:52,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 277. [2021-05-06 11:30:52,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 272 states have (on average 1.0073529411764706) internal successors, (274), 272 states have internal predecessors, (274), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:52,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2021-05-06 11:30:52,053 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 274 [2021-05-06 11:30:52,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:30:52,053 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2021-05-06 11:30:52,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 131 states, 131 states have (on average 2.030534351145038) internal successors, (266), 130 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:52,053 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2021-05-06 11:30:52,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-05-06 11:30:52,054 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:30:52,054 INFO L523 BasicCegarLoop]: trace histogram [128, 128, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:30:52,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-05-06 11:30:52,054 INFO L428 AbstractCegarLoop]: === Iteration 132 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:30:52,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:30:52,054 INFO L82 PathProgramCache]: Analyzing trace with hash -788407761, now seen corresponding path program 128 times [2021-05-06 11:30:52,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:30:52,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105899482] [2021-05-06 11:30:52,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:30:52,057 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:30:52,057 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:30:52,058 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:30:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:58,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:30:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:30:58,437 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:30:58,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105899482] [2021-05-06 11:30:58,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2105899482] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:30:58,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:30:58,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2021-05-06 11:30:58,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087915068] [2021-05-06 11:30:58,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 132 states [2021-05-06 11:30:58,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:30:58,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-05-06 11:30:58,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2021-05-06 11:30:58,439 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand has 132 states, 132 states have (on average 2.0303030303030303) internal successors, (268), 131 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:01,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:31:01,302 INFO L93 Difference]: Finished difference Result 803 states and 932 transitions. [2021-05-06 11:31:01,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-05-06 11:31:01,302 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.0303030303030303) internal successors, (268), 131 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 276 [2021-05-06 11:31:01,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:31:01,304 INFO L225 Difference]: With dead ends: 803 [2021-05-06 11:31:01,304 INFO L226 Difference]: Without dead ends: 789 [2021-05-06 11:31:01,304 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 6246.3ms TimeCoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2021-05-06 11:31:01,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-05-06 11:31:01,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 279. [2021-05-06 11:31:01,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 274 states have (on average 1.0072992700729928) internal successors, (276), 274 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:01,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 280 transitions. [2021-05-06 11:31:01,446 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 280 transitions. Word has length 276 [2021-05-06 11:31:01,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:31:01,446 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 280 transitions. [2021-05-06 11:31:01,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 132 states, 132 states have (on average 2.0303030303030303) internal successors, (268), 131 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:01,446 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 280 transitions. [2021-05-06 11:31:01,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-05-06 11:31:01,447 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:31:01,447 INFO L523 BasicCegarLoop]: trace histogram [129, 129, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:31:01,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-05-06 11:31:01,447 INFO L428 AbstractCegarLoop]: === Iteration 133 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:31:01,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:31:01,447 INFO L82 PathProgramCache]: Analyzing trace with hash 787007825, now seen corresponding path program 129 times [2021-05-06 11:31:01,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:31:01,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323632559] [2021-05-06 11:31:01,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:31:01,450 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:31:01,450 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:31:01,451 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:31:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:07,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:31:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:31:07,931 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:31:07,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323632559] [2021-05-06 11:31:07,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [323632559] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:31:07,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:31:07,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2021-05-06 11:31:07,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763066536] [2021-05-06 11:31:07,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 133 states [2021-05-06 11:31:07,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:31:07,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2021-05-06 11:31:07,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2021-05-06 11:31:07,933 INFO L87 Difference]: Start difference. First operand 279 states and 280 transitions. Second operand has 133 states, 133 states have (on average 2.030075187969925) internal successors, (270), 132 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:10,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:31:10,932 INFO L93 Difference]: Finished difference Result 809 states and 939 transitions. [2021-05-06 11:31:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-05-06 11:31:10,932 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.030075187969925) internal successors, (270), 132 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 278 [2021-05-06 11:31:10,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:31:10,933 INFO L225 Difference]: With dead ends: 809 [2021-05-06 11:31:10,933 INFO L226 Difference]: Without dead ends: 795 [2021-05-06 11:31:10,934 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 6347.5ms TimeCoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2021-05-06 11:31:10,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2021-05-06 11:31:11,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 281. [2021-05-06 11:31:11,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0072463768115942) internal successors, (278), 276 states have internal predecessors, (278), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:11,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 282 transitions. [2021-05-06 11:31:11,088 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 282 transitions. Word has length 278 [2021-05-06 11:31:11,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:31:11,088 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 282 transitions. [2021-05-06 11:31:11,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 133 states, 133 states have (on average 2.030075187969925) internal successors, (270), 132 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:11,089 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 282 transitions. [2021-05-06 11:31:11,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-05-06 11:31:11,089 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:31:11,089 INFO L523 BasicCegarLoop]: trace histogram [130, 130, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:31:11,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-05-06 11:31:11,089 INFO L428 AbstractCegarLoop]: === Iteration 134 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:31:11,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:31:11,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1362069517, now seen corresponding path program 130 times [2021-05-06 11:31:11,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:31:11,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134316078] [2021-05-06 11:31:11,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:31:11,093 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:31:11,093 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:31:11,093 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:31:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:17,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:31:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:31:17,657 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:31:17,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134316078] [2021-05-06 11:31:17,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2134316078] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:31:17,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:31:17,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2021-05-06 11:31:17,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409150899] [2021-05-06 11:31:17,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 134 states [2021-05-06 11:31:17,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:31:17,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-05-06 11:31:17,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2021-05-06 11:31:17,659 INFO L87 Difference]: Start difference. First operand 281 states and 282 transitions. Second operand has 134 states, 134 states have (on average 2.029850746268657) internal successors, (272), 133 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:20,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:31:20,908 INFO L93 Difference]: Finished difference Result 815 states and 946 transitions. [2021-05-06 11:31:20,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-05-06 11:31:20,908 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.029850746268657) internal successors, (272), 133 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 280 [2021-05-06 11:31:20,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:31:20,910 INFO L225 Difference]: With dead ends: 815 [2021-05-06 11:31:20,910 INFO L226 Difference]: Without dead ends: 801 [2021-05-06 11:31:20,910 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 6439.8ms TimeCoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2021-05-06 11:31:20,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2021-05-06 11:31:21,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 283. [2021-05-06 11:31:21,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 278 states have (on average 1.0071942446043165) internal successors, (280), 278 states have internal predecessors, (280), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:21,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 284 transitions. [2021-05-06 11:31:21,057 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 284 transitions. Word has length 280 [2021-05-06 11:31:21,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:31:21,057 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 284 transitions. [2021-05-06 11:31:21,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 134 states, 134 states have (on average 2.029850746268657) internal successors, (272), 133 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:21,057 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 284 transitions. [2021-05-06 11:31:21,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-05-06 11:31:21,058 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:31:21,058 INFO L523 BasicCegarLoop]: trace histogram [131, 131, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:31:21,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-05-06 11:31:21,058 INFO L428 AbstractCegarLoop]: === Iteration 135 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:31:21,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:31:21,058 INFO L82 PathProgramCache]: Analyzing trace with hash -746125803, now seen corresponding path program 131 times [2021-05-06 11:31:21,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:31:21,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425216052] [2021-05-06 11:31:21,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:31:21,061 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:31:21,061 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:31:21,062 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:31:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:27,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:31:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:31:27,707 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:31:27,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425216052] [2021-05-06 11:31:27,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [425216052] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:31:27,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:31:27,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2021-05-06 11:31:27,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111579768] [2021-05-06 11:31:27,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 135 states [2021-05-06 11:31:27,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:31:27,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-05-06 11:31:27,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2021-05-06 11:31:27,709 INFO L87 Difference]: Start difference. First operand 283 states and 284 transitions. Second operand has 135 states, 135 states have (on average 2.0296296296296297) internal successors, (274), 134 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:30,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:31:30,554 INFO L93 Difference]: Finished difference Result 821 states and 953 transitions. [2021-05-06 11:31:30,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-05-06 11:31:30,555 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.0296296296296297) internal successors, (274), 134 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 282 [2021-05-06 11:31:30,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:31:30,556 INFO L225 Difference]: With dead ends: 821 [2021-05-06 11:31:30,556 INFO L226 Difference]: Without dead ends: 807 [2021-05-06 11:31:30,557 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 6530.3ms TimeCoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2021-05-06 11:31:30,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-05-06 11:31:30,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 285. [2021-05-06 11:31:30,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.0071428571428571) internal successors, (282), 280 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:30,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 286 transitions. [2021-05-06 11:31:30,793 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 286 transitions. Word has length 282 [2021-05-06 11:31:30,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:31:30,793 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 286 transitions. [2021-05-06 11:31:30,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 135 states, 135 states have (on average 2.0296296296296297) internal successors, (274), 134 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:30,793 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 286 transitions. [2021-05-06 11:31:30,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-05-06 11:31:30,794 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:31:30,794 INFO L523 BasicCegarLoop]: trace histogram [132, 132, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:31:30,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-05-06 11:31:30,794 INFO L428 AbstractCegarLoop]: === Iteration 136 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:31:30,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:31:30,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1529703497, now seen corresponding path program 132 times [2021-05-06 11:31:30,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:31:30,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193893141] [2021-05-06 11:31:30,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:31:30,797 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:31:30,797 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:31:30,798 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:31:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:37,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:31:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:31:37,559 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:31:37,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193893141] [2021-05-06 11:31:37,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [193893141] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:31:37,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:31:37,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2021-05-06 11:31:37,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36778897] [2021-05-06 11:31:37,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 136 states [2021-05-06 11:31:37,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:31:37,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-05-06 11:31:37,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2021-05-06 11:31:37,561 INFO L87 Difference]: Start difference. First operand 285 states and 286 transitions. Second operand has 136 states, 136 states have (on average 2.0294117647058822) internal successors, (276), 135 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:42,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:31:42,229 INFO L93 Difference]: Finished difference Result 827 states and 960 transitions. [2021-05-06 11:31:42,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-05-06 11:31:42,230 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0294117647058822) internal successors, (276), 135 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 284 [2021-05-06 11:31:42,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:31:42,231 INFO L225 Difference]: With dead ends: 827 [2021-05-06 11:31:42,231 INFO L226 Difference]: Without dead ends: 813 [2021-05-06 11:31:42,231 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 6636.1ms TimeCoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2021-05-06 11:31:42,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-05-06 11:31:42,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 287. [2021-05-06 11:31:42,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 282 states have (on average 1.0070921985815602) internal successors, (284), 282 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:42,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 288 transitions. [2021-05-06 11:31:42,393 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 288 transitions. Word has length 284 [2021-05-06 11:31:42,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:31:42,394 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 288 transitions. [2021-05-06 11:31:42,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 136 states, 136 states have (on average 2.0294117647058822) internal successors, (276), 135 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:42,394 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 288 transitions. [2021-05-06 11:31:42,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-05-06 11:31:42,395 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:31:42,395 INFO L523 BasicCegarLoop]: trace histogram [133, 133, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:31:42,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-05-06 11:31:42,395 INFO L428 AbstractCegarLoop]: === Iteration 137 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:31:42,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:31:42,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1366376665, now seen corresponding path program 133 times [2021-05-06 11:31:42,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:31:42,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406328677] [2021-05-06 11:31:42,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:31:42,400 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:31:42,400 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:31:42,401 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:31:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:49,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:31:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:49,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:31:49,272 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:31:49,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406328677] [2021-05-06 11:31:49,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1406328677] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:31:49,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:31:49,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2021-05-06 11:31:49,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034310425] [2021-05-06 11:31:49,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 137 states [2021-05-06 11:31:49,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:31:49,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2021-05-06 11:31:49,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2021-05-06 11:31:49,274 INFO L87 Difference]: Start difference. First operand 287 states and 288 transitions. Second operand has 137 states, 137 states have (on average 2.0291970802919708) internal successors, (278), 136 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:53,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:31:53,908 INFO L93 Difference]: Finished difference Result 833 states and 967 transitions. [2021-05-06 11:31:53,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-05-06 11:31:53,909 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.0291970802919708) internal successors, (278), 136 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 286 [2021-05-06 11:31:53,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:31:53,910 INFO L225 Difference]: With dead ends: 833 [2021-05-06 11:31:53,910 INFO L226 Difference]: Without dead ends: 819 [2021-05-06 11:31:53,910 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 6755.1ms TimeCoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2021-05-06 11:31:53,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-05-06 11:31:54,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 289. [2021-05-06 11:31:54,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.0070422535211268) internal successors, (286), 284 states have internal predecessors, (286), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:54,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2021-05-06 11:31:54,070 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 286 [2021-05-06 11:31:54,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:31:54,070 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2021-05-06 11:31:54,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 137 states, 137 states have (on average 2.0291970802919708) internal successors, (278), 136 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:54,070 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2021-05-06 11:31:54,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-05-06 11:31:54,071 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:31:54,071 INFO L523 BasicCegarLoop]: trace histogram [134, 134, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:31:54,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-05-06 11:31:54,071 INFO L428 AbstractCegarLoop]: === Iteration 138 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:31:54,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:31:54,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1360604539, now seen corresponding path program 134 times [2021-05-06 11:31:54,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:31:54,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917058498] [2021-05-06 11:31:54,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:31:54,074 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:31:54,074 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:31:54,075 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:31:54,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:01,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:01,018 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:01,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917058498] [2021-05-06 11:32:01,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1917058498] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:01,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:01,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2021-05-06 11:32:01,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14162722] [2021-05-06 11:32:01,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 138 states [2021-05-06 11:32:01,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:01,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2021-05-06 11:32:01,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2021-05-06 11:32:01,020 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand has 138 states, 138 states have (on average 2.028985507246377) internal successors, (280), 137 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:05,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:05,296 INFO L93 Difference]: Finished difference Result 839 states and 974 transitions. [2021-05-06 11:32:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-05-06 11:32:05,296 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.028985507246377) internal successors, (280), 137 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 288 [2021-05-06 11:32:05,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:05,297 INFO L225 Difference]: With dead ends: 839 [2021-05-06 11:32:05,297 INFO L226 Difference]: Without dead ends: 825 [2021-05-06 11:32:05,298 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 6812.7ms TimeCoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2021-05-06 11:32:05,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-05-06 11:32:05,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 291. [2021-05-06 11:32:05,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 286 states have (on average 1.006993006993007) internal successors, (288), 286 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:05,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 292 transitions. [2021-05-06 11:32:05,476 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 292 transitions. Word has length 288 [2021-05-06 11:32:05,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:05,476 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 292 transitions. [2021-05-06 11:32:05,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 138 states, 138 states have (on average 2.028985507246377) internal successors, (280), 137 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:05,476 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 292 transitions. [2021-05-06 11:32:05,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-05-06 11:32:05,477 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:05,477 INFO L523 BasicCegarLoop]: trace histogram [135, 135, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:05,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2021-05-06 11:32:05,477 INFO L428 AbstractCegarLoop]: === Iteration 139 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:05,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:05,477 INFO L82 PathProgramCache]: Analyzing trace with hash 108558749, now seen corresponding path program 135 times [2021-05-06 11:32:05,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:05,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998069] [2021-05-06 11:32:05,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:05,480 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:05,480 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:05,481 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:12,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:12,518 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:12,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998069] [2021-05-06 11:32:12,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1998069] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:12,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:12,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2021-05-06 11:32:12,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904892879] [2021-05-06 11:32:12,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 139 states [2021-05-06 11:32:12,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:12,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-05-06 11:32:12,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2021-05-06 11:32:12,521 INFO L87 Difference]: Start difference. First operand 291 states and 292 transitions. Second operand has 139 states, 139 states have (on average 2.028776978417266) internal successors, (282), 138 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:16,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:16,603 INFO L93 Difference]: Finished difference Result 845 states and 981 transitions. [2021-05-06 11:32:16,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-05-06 11:32:16,603 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.028776978417266) internal successors, (282), 138 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 290 [2021-05-06 11:32:16,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:16,604 INFO L225 Difference]: With dead ends: 845 [2021-05-06 11:32:16,604 INFO L226 Difference]: Without dead ends: 831 [2021-05-06 11:32:16,605 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 6907.0ms TimeCoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2021-05-06 11:32:16,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-05-06 11:32:16,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 293. [2021-05-06 11:32:16,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 288 states have (on average 1.0069444444444444) internal successors, (290), 288 states have internal predecessors, (290), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:16,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 294 transitions. [2021-05-06 11:32:16,766 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 294 transitions. Word has length 290 [2021-05-06 11:32:16,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:16,766 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 294 transitions. [2021-05-06 11:32:16,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 139 states, 139 states have (on average 2.028776978417266) internal successors, (282), 138 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:16,766 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 294 transitions. [2021-05-06 11:32:16,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-05-06 11:32:16,767 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:16,767 INFO L523 BasicCegarLoop]: trace histogram [136, 136, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:16,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2021-05-06 11:32:16,767 INFO L428 AbstractCegarLoop]: === Iteration 140 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:16,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:16,767 INFO L82 PathProgramCache]: Analyzing trace with hash -516602561, now seen corresponding path program 136 times [2021-05-06 11:32:16,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:16,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390709920] [2021-05-06 11:32:16,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:16,776 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:16,776 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:16,776 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:23,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:23,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:23,918 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:23,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390709920] [2021-05-06 11:32:23,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [390709920] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:23,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:23,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2021-05-06 11:32:23,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282848525] [2021-05-06 11:32:23,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 140 states [2021-05-06 11:32:23,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:23,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2021-05-06 11:32:23,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2021-05-06 11:32:23,920 INFO L87 Difference]: Start difference. First operand 293 states and 294 transitions. Second operand has 140 states, 140 states have (on average 2.0285714285714285) internal successors, (284), 139 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:28,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:28,819 INFO L93 Difference]: Finished difference Result 851 states and 988 transitions. [2021-05-06 11:32:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-05-06 11:32:28,820 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0285714285714285) internal successors, (284), 139 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 292 [2021-05-06 11:32:28,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:28,821 INFO L225 Difference]: With dead ends: 851 [2021-05-06 11:32:28,821 INFO L226 Difference]: Without dead ends: 837 [2021-05-06 11:32:28,821 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 7011.9ms TimeCoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2021-05-06 11:32:28,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-05-06 11:32:28,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 295. [2021-05-06 11:32:28,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.006896551724138) internal successors, (292), 290 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2021-05-06 11:32:28,983 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 292 [2021-05-06 11:32:28,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:28,983 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2021-05-06 11:32:28,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 140 states, 140 states have (on average 2.0285714285714285) internal successors, (284), 139 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:28,984 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2021-05-06 11:32:28,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-05-06 11:32:28,984 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:28,984 INFO L523 BasicCegarLoop]: trace histogram [137, 137, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:28,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-05-06 11:32:28,985 INFO L428 AbstractCegarLoop]: === Iteration 141 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:28,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:28,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1200031, now seen corresponding path program 137 times [2021-05-06 11:32:28,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:28,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880474737] [2021-05-06 11:32:28,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:28,988 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:28,988 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:28,988 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:36,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:36,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:36,204 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:36,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880474737] [2021-05-06 11:32:36,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1880474737] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:36,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:36,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2021-05-06 11:32:36,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134250742] [2021-05-06 11:32:36,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 141 states [2021-05-06 11:32:36,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:36,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2021-05-06 11:32:36,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2021-05-06 11:32:36,206 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand has 141 states, 141 states have (on average 2.028368794326241) internal successors, (286), 140 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:40,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:40,016 INFO L93 Difference]: Finished difference Result 857 states and 995 transitions. [2021-05-06 11:32:40,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-05-06 11:32:40,016 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.028368794326241) internal successors, (286), 140 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 294 [2021-05-06 11:32:40,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:40,017 INFO L225 Difference]: With dead ends: 857 [2021-05-06 11:32:40,017 INFO L226 Difference]: Without dead ends: 843 [2021-05-06 11:32:40,018 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 7095.2ms TimeCoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2021-05-06 11:32:40,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-05-06 11:32:40,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 297. [2021-05-06 11:32:40,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 292 states have (on average 1.0068493150684932) internal successors, (294), 292 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:40,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 298 transitions. [2021-05-06 11:32:40,200 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 298 transitions. Word has length 294 [2021-05-06 11:32:40,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:40,201 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 298 transitions. [2021-05-06 11:32:40,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 141 states, 141 states have (on average 2.028368794326241) internal successors, (286), 140 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:40,201 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 298 transitions. [2021-05-06 11:32:40,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-05-06 11:32:40,201 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:40,202 INFO L523 BasicCegarLoop]: trace histogram [138, 138, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:40,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-05-06 11:32:40,202 INFO L428 AbstractCegarLoop]: === Iteration 142 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:40,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:40,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1379392259, now seen corresponding path program 138 times [2021-05-06 11:32:40,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:40,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981727182] [2021-05-06 11:32:40,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:40,206 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:40,206 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:40,207 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:47,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:47,501 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:47,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981727182] [2021-05-06 11:32:47,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1981727182] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:47,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:47,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2021-05-06 11:32:47,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432793664] [2021-05-06 11:32:47,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 142 states [2021-05-06 11:32:47,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:47,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2021-05-06 11:32:47,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2021-05-06 11:32:47,503 INFO L87 Difference]: Start difference. First operand 297 states and 298 transitions. Second operand has 142 states, 142 states have (on average 2.028169014084507) internal successors, (288), 141 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:52,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:52,898 INFO L93 Difference]: Finished difference Result 863 states and 1002 transitions. [2021-05-06 11:32:52,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-05-06 11:32:52,909 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.028169014084507) internal successors, (288), 141 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 296 [2021-05-06 11:32:52,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:52,910 INFO L225 Difference]: With dead ends: 863 [2021-05-06 11:32:52,911 INFO L226 Difference]: Without dead ends: 849 [2021-05-06 11:32:52,911 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 7173.4ms TimeCoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2021-05-06 11:32:52,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-05-06 11:32:53,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 299. [2021-05-06 11:32:53,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.0068027210884354) internal successors, (296), 294 states have internal predecessors, (296), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:53,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 300 transitions. [2021-05-06 11:32:53,150 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 300 transitions. Word has length 296 [2021-05-06 11:32:53,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:53,150 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 300 transitions. [2021-05-06 11:32:53,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 142 states, 142 states have (on average 2.028169014084507) internal successors, (288), 141 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:53,150 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 300 transitions. [2021-05-06 11:32:53,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-05-06 11:32:53,151 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:53,151 INFO L523 BasicCegarLoop]: trace histogram [139, 139, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:53,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-05-06 11:32:53,151 INFO L428 AbstractCegarLoop]: === Iteration 143 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:53,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:53,151 INFO L82 PathProgramCache]: Analyzing trace with hash 983688485, now seen corresponding path program 139 times [2021-05-06 11:32:53,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:53,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335455181] [2021-05-06 11:32:53,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:53,155 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:53,155 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:53,156 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:00,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:00,647 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:00,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335455181] [2021-05-06 11:33:00,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1335455181] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:00,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:00,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2021-05-06 11:33:00,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464314047] [2021-05-06 11:33:00,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 143 states [2021-05-06 11:33:00,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:00,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2021-05-06 11:33:00,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2021-05-06 11:33:00,649 INFO L87 Difference]: Start difference. First operand 299 states and 300 transitions. Second operand has 143 states, 143 states have (on average 2.027972027972028) internal successors, (290), 142 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:06,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:06,789 INFO L93 Difference]: Finished difference Result 869 states and 1009 transitions. [2021-05-06 11:33:06,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-05-06 11:33:06,790 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.027972027972028) internal successors, (290), 142 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 298 [2021-05-06 11:33:06,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:06,791 INFO L225 Difference]: With dead ends: 869 [2021-05-06 11:33:06,791 INFO L226 Difference]: Without dead ends: 855 [2021-05-06 11:33:06,791 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 7345.1ms TimeCoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2021-05-06 11:33:06,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-05-06 11:33:06,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 301. [2021-05-06 11:33:06,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 296 states have (on average 1.0067567567567568) internal successors, (298), 296 states have internal predecessors, (298), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:06,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 302 transitions. [2021-05-06 11:33:06,965 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 302 transitions. Word has length 298 [2021-05-06 11:33:06,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:06,965 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 302 transitions. [2021-05-06 11:33:06,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 143 states, 143 states have (on average 2.027972027972028) internal successors, (290), 142 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:06,965 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 302 transitions. [2021-05-06 11:33:06,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-05-06 11:33:06,966 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:06,966 INFO L523 BasicCegarLoop]: trace histogram [140, 140, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:06,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-05-06 11:33:06,966 INFO L428 AbstractCegarLoop]: === Iteration 144 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:06,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:06,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1330516281, now seen corresponding path program 140 times [2021-05-06 11:33:06,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:06,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329666261] [2021-05-06 11:33:06,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:06,969 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:06,969 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:06,970 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:14,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:14,494 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:14,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329666261] [2021-05-06 11:33:14,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [329666261] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:14,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:14,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2021-05-06 11:33:14,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841145537] [2021-05-06 11:33:14,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 144 states [2021-05-06 11:33:14,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:14,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-05-06 11:33:14,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2021-05-06 11:33:14,496 INFO L87 Difference]: Start difference. First operand 301 states and 302 transitions. Second operand has 144 states, 144 states have (on average 2.0277777777777777) internal successors, (292), 143 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:18,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:18,138 INFO L93 Difference]: Finished difference Result 875 states and 1016 transitions. [2021-05-06 11:33:18,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-05-06 11:33:18,138 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.0277777777777777) internal successors, (292), 143 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 300 [2021-05-06 11:33:18,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:18,139 INFO L225 Difference]: With dead ends: 875 [2021-05-06 11:33:18,139 INFO L226 Difference]: Without dead ends: 861 [2021-05-06 11:33:18,140 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 7376.3ms TimeCoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2021-05-06 11:33:18,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-05-06 11:33:18,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 303. [2021-05-06 11:33:18,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 298 states have (on average 1.0067114093959733) internal successors, (300), 298 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:18,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 304 transitions. [2021-05-06 11:33:18,318 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 304 transitions. Word has length 300 [2021-05-06 11:33:18,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:18,318 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 304 transitions. [2021-05-06 11:33:18,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 144 states, 144 states have (on average 2.0277777777777777) internal successors, (292), 143 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:18,319 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 304 transitions. [2021-05-06 11:33:18,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-05-06 11:33:18,319 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:18,319 INFO L523 BasicCegarLoop]: trace histogram [141, 141, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:18,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2021-05-06 11:33:18,320 INFO L428 AbstractCegarLoop]: === Iteration 145 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:18,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:18,320 INFO L82 PathProgramCache]: Analyzing trace with hash -488237079, now seen corresponding path program 141 times [2021-05-06 11:33:18,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:18,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091708763] [2021-05-06 11:33:18,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:18,339 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:18,339 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:18,340 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:25,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:25,977 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:25,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091708763] [2021-05-06 11:33:25,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1091708763] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:25,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:25,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2021-05-06 11:33:25,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818853461] [2021-05-06 11:33:25,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 145 states [2021-05-06 11:33:25,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:25,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2021-05-06 11:33:25,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2021-05-06 11:33:25,979 INFO L87 Difference]: Start difference. First operand 303 states and 304 transitions. Second operand has 145 states, 145 states have (on average 2.027586206896552) internal successors, (294), 144 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:30,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:30,471 INFO L93 Difference]: Finished difference Result 881 states and 1023 transitions. [2021-05-06 11:33:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-05-06 11:33:30,472 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.027586206896552) internal successors, (294), 144 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 302 [2021-05-06 11:33:30,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:30,473 INFO L225 Difference]: With dead ends: 881 [2021-05-06 11:33:30,473 INFO L226 Difference]: Without dead ends: 867 [2021-05-06 11:33:30,473 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 7495.5ms TimeCoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2021-05-06 11:33:30,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2021-05-06 11:33:30,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 305. [2021-05-06 11:33:30,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 300 states have (on average 1.0066666666666666) internal successors, (302), 300 states have internal predecessors, (302), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:30,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 306 transitions. [2021-05-06 11:33:30,653 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 306 transitions. Word has length 302 [2021-05-06 11:33:30,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:30,653 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 306 transitions. [2021-05-06 11:33:30,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 145 states, 145 states have (on average 2.027586206896552) internal successors, (294), 144 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:30,654 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 306 transitions. [2021-05-06 11:33:30,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-05-06 11:33:30,654 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:30,654 INFO L523 BasicCegarLoop]: trace histogram [142, 142, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:30,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2021-05-06 11:33:30,655 INFO L428 AbstractCegarLoop]: === Iteration 146 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:30,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:30,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1488224395, now seen corresponding path program 142 times [2021-05-06 11:33:30,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:30,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205243760] [2021-05-06 11:33:30,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:30,658 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:30,658 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:30,658 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:38,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:38,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:38,479 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:38,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205243760] [2021-05-06 11:33:38,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1205243760] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:38,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:38,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2021-05-06 11:33:38,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851502248] [2021-05-06 11:33:38,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 146 states [2021-05-06 11:33:38,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:38,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2021-05-06 11:33:38,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2021-05-06 11:33:38,482 INFO L87 Difference]: Start difference. First operand 305 states and 306 transitions. Second operand has 146 states, 146 states have (on average 2.0273972602739727) internal successors, (296), 145 states have internal predecessors, (296), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:44,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:44,360 INFO L93 Difference]: Finished difference Result 887 states and 1030 transitions. [2021-05-06 11:33:44,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-05-06 11:33:44,360 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.0273972602739727) internal successors, (296), 145 states have internal predecessors, (296), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 304 [2021-05-06 11:33:44,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:44,361 INFO L225 Difference]: With dead ends: 887 [2021-05-06 11:33:44,361 INFO L226 Difference]: Without dead ends: 873 [2021-05-06 11:33:44,362 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 7675.4ms TimeCoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2021-05-06 11:33:44,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-05-06 11:33:44,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 307. [2021-05-06 11:33:44,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 302 states have (on average 1.0066225165562914) internal successors, (304), 302 states have internal predecessors, (304), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:44,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2021-05-06 11:33:44,545 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 304 [2021-05-06 11:33:44,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:44,545 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2021-05-06 11:33:44,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 146 states, 146 states have (on average 2.0273972602739727) internal successors, (296), 145 states have internal predecessors, (296), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:44,545 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2021-05-06 11:33:44,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-05-06 11:33:44,546 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:44,546 INFO L523 BasicCegarLoop]: trace histogram [143, 143, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:44,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2021-05-06 11:33:44,546 INFO L428 AbstractCegarLoop]: === Iteration 147 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:44,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:44,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1802811219, now seen corresponding path program 143 times [2021-05-06 11:33:44,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:44,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210738170] [2021-05-06 11:33:44,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:44,549 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:44,550 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:44,550 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:52,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:52,350 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:52,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210738170] [2021-05-06 11:33:52,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [210738170] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:52,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:52,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2021-05-06 11:33:52,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4521719] [2021-05-06 11:33:52,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 147 states [2021-05-06 11:33:52,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:52,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2021-05-06 11:33:52,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10587, Invalid=10875, Unknown=0, NotChecked=0, Total=21462 [2021-05-06 11:33:52,352 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand has 147 states, 147 states have (on average 2.0272108843537415) internal successors, (298), 146 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:57,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:57,869 INFO L93 Difference]: Finished difference Result 893 states and 1037 transitions. [2021-05-06 11:33:57,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2021-05-06 11:33:57,869 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 2.0272108843537415) internal successors, (298), 146 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 306 [2021-05-06 11:33:57,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:57,870 INFO L225 Difference]: With dead ends: 893 [2021-05-06 11:33:57,870 INFO L226 Difference]: Without dead ends: 879 [2021-05-06 11:33:57,871 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 7671.7ms TimeCoverageRelationStatistics Valid=10587, Invalid=10875, Unknown=0, NotChecked=0, Total=21462 [2021-05-06 11:33:57,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2021-05-06 11:33:58,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 309. [2021-05-06 11:33:58,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 304 states have (on average 1.006578947368421) internal successors, (306), 304 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 310 transitions. [2021-05-06 11:33:58,071 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 310 transitions. Word has length 306 [2021-05-06 11:33:58,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:58,072 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 310 transitions. [2021-05-06 11:33:58,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 147 states, 147 states have (on average 2.0272108843537415) internal successors, (298), 146 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:58,072 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 310 transitions. [2021-05-06 11:33:58,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-05-06 11:33:58,072 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:58,073 INFO L523 BasicCegarLoop]: trace histogram [144, 144, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:58,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2021-05-06 11:33:58,073 INFO L428 AbstractCegarLoop]: === Iteration 148 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:58,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:58,073 INFO L82 PathProgramCache]: Analyzing trace with hash 902860879, now seen corresponding path program 144 times [2021-05-06 11:33:58,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:58,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766372844] [2021-05-06 11:33:58,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:58,076 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:58,076 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:58,076 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:06,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:34:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:06,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:34:06,015 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:34:06,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766372844] [2021-05-06 11:34:06,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [766372844] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:34:06,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:34:06,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [148] imperfect sequences [] total 148 [2021-05-06 11:34:06,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472903657] [2021-05-06 11:34:06,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 148 states [2021-05-06 11:34:06,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:34:06,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2021-05-06 11:34:06,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2021-05-06 11:34:06,017 INFO L87 Difference]: Start difference. First operand 309 states and 310 transitions. Second operand has 148 states, 148 states have (on average 2.027027027027027) internal successors, (300), 147 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:11,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:34:11,721 INFO L93 Difference]: Finished difference Result 899 states and 1044 transitions. [2021-05-06 11:34:11,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-05-06 11:34:11,722 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 2.027027027027027) internal successors, (300), 147 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 308 [2021-05-06 11:34:11,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:34:11,722 INFO L225 Difference]: With dead ends: 899 [2021-05-06 11:34:11,722 INFO L226 Difference]: Without dead ends: 885 [2021-05-06 11:34:11,725 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 7808.7ms TimeCoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2021-05-06 11:34:11,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2021-05-06 11:34:11,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 311. [2021-05-06 11:34:11,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 306 states have (on average 1.0065359477124183) internal successors, (308), 306 states have internal predecessors, (308), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:11,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 312 transitions. [2021-05-06 11:34:11,929 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 312 transitions. Word has length 308 [2021-05-06 11:34:11,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:34:11,929 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 312 transitions. [2021-05-06 11:34:11,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 148 states, 148 states have (on average 2.027027027027027) internal successors, (300), 147 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:11,930 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 312 transitions. [2021-05-06 11:34:11,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-05-06 11:34:11,930 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:34:11,930 INFO L523 BasicCegarLoop]: trace histogram [145, 145, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:34:11,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2021-05-06 11:34:11,931 INFO L428 AbstractCegarLoop]: === Iteration 149 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:34:11,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:34:11,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1696434319, now seen corresponding path program 145 times [2021-05-06 11:34:11,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:34:11,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040082321] [2021-05-06 11:34:11,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:34:11,934 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:34:11,934 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:34:11,935 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:34:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:19,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:34:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:34:19,966 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:34:19,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040082321] [2021-05-06 11:34:19,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1040082321] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:34:19,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:34:19,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2021-05-06 11:34:19,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778537539] [2021-05-06 11:34:19,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 149 states [2021-05-06 11:34:19,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:34:19,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2021-05-06 11:34:19,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10880, Invalid=11172, Unknown=0, NotChecked=0, Total=22052 [2021-05-06 11:34:19,968 INFO L87 Difference]: Start difference. First operand 311 states and 312 transitions. Second operand has 149 states, 149 states have (on average 2.0268456375838926) internal successors, (302), 148 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:25,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:34:25,823 INFO L93 Difference]: Finished difference Result 905 states and 1051 transitions. [2021-05-06 11:34:25,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-05-06 11:34:25,823 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.0268456375838926) internal successors, (302), 148 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 310 [2021-05-06 11:34:25,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:34:25,824 INFO L225 Difference]: With dead ends: 905 [2021-05-06 11:34:25,824 INFO L226 Difference]: Without dead ends: 891 [2021-05-06 11:34:25,825 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 7884.7ms TimeCoverageRelationStatistics Valid=10880, Invalid=11172, Unknown=0, NotChecked=0, Total=22052 [2021-05-06 11:34:25,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-05-06 11:34:26,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 313. [2021-05-06 11:34:26,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 308 states have (on average 1.0064935064935066) internal successors, (310), 308 states have internal predecessors, (310), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:26,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 314 transitions. [2021-05-06 11:34:26,066 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 314 transitions. Word has length 310 [2021-05-06 11:34:26,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:34:26,067 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 314 transitions. [2021-05-06 11:34:26,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 149 states, 149 states have (on average 2.0268456375838926) internal successors, (302), 148 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:26,067 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 314 transitions. [2021-05-06 11:34:26,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-05-06 11:34:26,067 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:34:26,068 INFO L523 BasicCegarLoop]: trace histogram [146, 146, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:34:26,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2021-05-06 11:34:26,068 INFO L428 AbstractCegarLoop]: === Iteration 150 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:34:26,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:34:26,068 INFO L82 PathProgramCache]: Analyzing trace with hash 51846675, now seen corresponding path program 146 times [2021-05-06 11:34:26,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:34:26,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943596149] [2021-05-06 11:34:26,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:34:26,071 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:34:26,071 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:34:26,072 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:34:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:34,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:34:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:34:34,243 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:34:34,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943596149] [2021-05-06 11:34:34,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1943596149] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:34:34,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:34:34,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [150] imperfect sequences [] total 150 [2021-05-06 11:34:34,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071122321] [2021-05-06 11:34:34,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 150 states [2021-05-06 11:34:34,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:34:34,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2021-05-06 11:34:34,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2021-05-06 11:34:34,245 INFO L87 Difference]: Start difference. First operand 313 states and 314 transitions. Second operand has 150 states, 150 states have (on average 2.026666666666667) internal successors, (304), 149 states have internal predecessors, (304), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:40,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:34:40,285 INFO L93 Difference]: Finished difference Result 911 states and 1058 transitions. [2021-05-06 11:34:40,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-05-06 11:34:40,285 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 2.026666666666667) internal successors, (304), 149 states have internal predecessors, (304), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 312 [2021-05-06 11:34:40,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:34:40,286 INFO L225 Difference]: With dead ends: 911 [2021-05-06 11:34:40,286 INFO L226 Difference]: Without dead ends: 897 [2021-05-06 11:34:40,287 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 8041.1ms TimeCoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2021-05-06 11:34:40,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-05-06 11:34:40,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 315. [2021-05-06 11:34:40,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 310 states have (on average 1.0064516129032257) internal successors, (312), 310 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:40,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 316 transitions. [2021-05-06 11:34:40,501 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 316 transitions. Word has length 312 [2021-05-06 11:34:40,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:34:40,501 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 316 transitions. [2021-05-06 11:34:40,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 150 states, 150 states have (on average 2.026666666666667) internal successors, (304), 149 states have internal predecessors, (304), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:40,502 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 316 transitions. [2021-05-06 11:34:40,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-05-06 11:34:40,502 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:34:40,503 INFO L523 BasicCegarLoop]: trace histogram [147, 147, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:34:40,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2021-05-06 11:34:40,503 INFO L428 AbstractCegarLoop]: === Iteration 151 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:34:40,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:34:40,503 INFO L82 PathProgramCache]: Analyzing trace with hash 817669173, now seen corresponding path program 147 times [2021-05-06 11:34:40,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:34:40,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228987002] [2021-05-06 11:34:40,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:34:40,506 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:34:40,506 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:34:40,506 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:34:40,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:48,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:34:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:34:48,903 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:34:48,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228987002] [2021-05-06 11:34:48,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1228987002] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:34:48,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:34:48,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [151] imperfect sequences [] total 151 [2021-05-06 11:34:48,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906015011] [2021-05-06 11:34:48,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 151 states [2021-05-06 11:34:48,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:34:48,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2021-05-06 11:34:48,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11177, Invalid=11473, Unknown=0, NotChecked=0, Total=22650 [2021-05-06 11:34:48,905 INFO L87 Difference]: Start difference. First operand 315 states and 316 transitions. Second operand has 151 states, 151 states have (on average 2.0264900662251657) internal successors, (306), 150 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:53,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:34:53,374 INFO L93 Difference]: Finished difference Result 917 states and 1065 transitions. [2021-05-06 11:34:53,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-05-06 11:34:53,374 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.0264900662251657) internal successors, (306), 150 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 314 [2021-05-06 11:34:53,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:34:53,375 INFO L225 Difference]: With dead ends: 917 [2021-05-06 11:34:53,375 INFO L226 Difference]: Without dead ends: 903 [2021-05-06 11:34:53,376 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 8257.4ms TimeCoverageRelationStatistics Valid=11177, Invalid=11473, Unknown=0, NotChecked=0, Total=22650 [2021-05-06 11:34:53,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2021-05-06 11:34:53,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 317. [2021-05-06 11:34:53,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 312 states have (on average 1.0064102564102564) internal successors, (314), 312 states have internal predecessors, (314), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:53,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 318 transitions. [2021-05-06 11:34:53,603 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 318 transitions. Word has length 314 [2021-05-06 11:34:53,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:34:53,603 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 318 transitions. [2021-05-06 11:34:53,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 151 states, 151 states have (on average 2.0264900662251657) internal successors, (306), 150 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:53,604 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 318 transitions. [2021-05-06 11:34:53,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-05-06 11:34:53,604 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:34:53,604 INFO L523 BasicCegarLoop]: trace histogram [148, 148, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:34:53,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2021-05-06 11:34:53,605 INFO L428 AbstractCegarLoop]: === Iteration 152 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:34:53,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:34:53,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1961285161, now seen corresponding path program 148 times [2021-05-06 11:34:53,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:34:53,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511738645] [2021-05-06 11:34:53,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:34:53,608 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:34:53,609 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:34:53,609 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:34:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:01,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:35:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:35:01,983 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:35:01,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511738645] [2021-05-06 11:35:01,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [511738645] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:35:01,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:35:01,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [152] imperfect sequences [] total 152 [2021-05-06 11:35:01,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620580613] [2021-05-06 11:35:01,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 152 states [2021-05-06 11:35:01,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:35:01,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2021-05-06 11:35:01,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2021-05-06 11:35:01,986 INFO L87 Difference]: Start difference. First operand 317 states and 318 transitions. Second operand has 152 states, 152 states have (on average 2.026315789473684) internal successors, (308), 151 states have internal predecessors, (308), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:35:07,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:35:07,566 INFO L93 Difference]: Finished difference Result 923 states and 1072 transitions. [2021-05-06 11:35:07,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-05-06 11:35:07,566 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.026315789473684) internal successors, (308), 151 states have internal predecessors, (308), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 316 [2021-05-06 11:35:07,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:35:07,567 INFO L225 Difference]: With dead ends: 923 [2021-05-06 11:35:07,567 INFO L226 Difference]: Without dead ends: 909 [2021-05-06 11:35:07,568 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 8218.4ms TimeCoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2021-05-06 11:35:07,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2021-05-06 11:35:07,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 319. [2021-05-06 11:35:07,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 314 states have (on average 1.0063694267515924) internal successors, (316), 314 states have internal predecessors, (316), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:35:07,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 320 transitions. [2021-05-06 11:35:07,774 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 320 transitions. Word has length 316 [2021-05-06 11:35:07,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:35:07,774 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 320 transitions. [2021-05-06 11:35:07,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 152 states, 152 states have (on average 2.026315789473684) internal successors, (308), 151 states have internal predecessors, (308), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:35:07,775 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 320 transitions. [2021-05-06 11:35:07,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-05-06 11:35:07,775 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:35:07,775 INFO L523 BasicCegarLoop]: trace histogram [149, 149, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:35:07,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2021-05-06 11:35:07,776 INFO L428 AbstractCegarLoop]: === Iteration 153 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:35:07,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:35:07,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1066742023, now seen corresponding path program 149 times [2021-05-06 11:35:07,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:35:07,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010046958] [2021-05-06 11:35:07,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:35:07,779 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:35:07,779 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:35:07,779 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:35:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:16,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:35:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:35:16,246 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:35:16,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010046958] [2021-05-06 11:35:16,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1010046958] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:35:16,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:35:16,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [153] imperfect sequences [] total 153 [2021-05-06 11:35:16,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847234036] [2021-05-06 11:35:16,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 153 states [2021-05-06 11:35:16,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:35:16,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2021-05-06 11:35:16,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11478, Invalid=11778, Unknown=0, NotChecked=0, Total=23256 [2021-05-06 11:35:16,249 INFO L87 Difference]: Start difference. First operand 319 states and 320 transitions. Second operand has 153 states, 153 states have (on average 2.026143790849673) internal successors, (310), 152 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:35:23,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:35:23,177 INFO L93 Difference]: Finished difference Result 929 states and 1079 transitions. [2021-05-06 11:35:23,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2021-05-06 11:35:23,177 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 2.026143790849673) internal successors, (310), 152 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 318 [2021-05-06 11:35:23,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:35:23,178 INFO L225 Difference]: With dead ends: 929 [2021-05-06 11:35:23,179 INFO L226 Difference]: Without dead ends: 915 [2021-05-06 11:35:23,179 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 8321.5ms TimeCoverageRelationStatistics Valid=11478, Invalid=11778, Unknown=0, NotChecked=0, Total=23256 [2021-05-06 11:35:23,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-05-06 11:35:23,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 321. [2021-05-06 11:35:23,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 316 states have (on average 1.0063291139240507) internal successors, (318), 316 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:35:23,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 322 transitions. [2021-05-06 11:35:23,435 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 322 transitions. Word has length 318 [2021-05-06 11:35:23,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:35:23,435 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 322 transitions. [2021-05-06 11:35:23,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 153 states, 153 states have (on average 2.026143790849673) internal successors, (310), 152 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:35:23,435 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 322 transitions. [2021-05-06 11:35:23,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-05-06 11:35:23,436 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:35:23,436 INFO L523 BasicCegarLoop]: trace histogram [150, 150, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:35:23,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2021-05-06 11:35:23,436 INFO L428 AbstractCegarLoop]: === Iteration 154 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:35:23,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:35:23,436 INFO L82 PathProgramCache]: Analyzing trace with hash -404245605, now seen corresponding path program 150 times [2021-05-06 11:35:23,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:35:23,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73900443] [2021-05-06 11:35:23,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:35:23,440 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:35:23,440 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:35:23,441 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:35:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:31,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:35:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:35:31,912 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:35:31,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73900443] [2021-05-06 11:35:31,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [73900443] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:35:31,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:35:31,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [154] imperfect sequences [] total 154 [2021-05-06 11:35:31,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850300234] [2021-05-06 11:35:31,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 154 states [2021-05-06 11:35:31,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:35:31,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2021-05-06 11:35:31,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11630, Invalid=11932, Unknown=0, NotChecked=0, Total=23562 [2021-05-06 11:35:31,915 INFO L87 Difference]: Start difference. First operand 321 states and 322 transitions. Second operand has 154 states, 154 states have (on average 2.0259740259740258) internal successors, (312), 153 states have internal predecessors, (312), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:35:37,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:35:37,634 INFO L93 Difference]: Finished difference Result 935 states and 1086 transitions. [2021-05-06 11:35:37,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2021-05-06 11:35:37,635 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 2.0259740259740258) internal successors, (312), 153 states have internal predecessors, (312), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 320 [2021-05-06 11:35:37,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:35:37,636 INFO L225 Difference]: With dead ends: 935 [2021-05-06 11:35:37,636 INFO L226 Difference]: Without dead ends: 921 [2021-05-06 11:35:37,637 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 8334.8ms TimeCoverageRelationStatistics Valid=11630, Invalid=11932, Unknown=0, NotChecked=0, Total=23562 [2021-05-06 11:35:37,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-05-06 11:35:37,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 323. [2021-05-06 11:35:37,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 318 states have (on average 1.0062893081761006) internal successors, (320), 318 states have internal predecessors, (320), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:35:37,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 324 transitions. [2021-05-06 11:35:37,868 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 324 transitions. Word has length 320 [2021-05-06 11:35:37,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:35:37,868 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 324 transitions. [2021-05-06 11:35:37,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 154 states, 154 states have (on average 2.0259740259740258) internal successors, (312), 153 states have internal predecessors, (312), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:35:37,868 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 324 transitions. [2021-05-06 11:35:37,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-05-06 11:35:37,869 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:35:37,869 INFO L523 BasicCegarLoop]: trace histogram [151, 151, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:35:37,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2021-05-06 11:35:37,869 INFO L428 AbstractCegarLoop]: === Iteration 155 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:35:37,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:35:37,869 INFO L82 PathProgramCache]: Analyzing trace with hash 599652285, now seen corresponding path program 151 times [2021-05-06 11:35:37,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:35:37,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555718593] [2021-05-06 11:35:37,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:35:37,873 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:35:37,873 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:35:37,873 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:35:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat