/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 02:08:19,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 02:08:19,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 02:08:19,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 02:08:19,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 02:08:19,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 02:08:19,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 02:08:19,749 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 02:08:19,765 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 02:08:19,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 02:08:19,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 02:08:19,768 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 02:08:19,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 02:08:19,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 02:08:19,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 02:08:19,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 02:08:19,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 02:08:19,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 02:08:19,770 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 02:08:19,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 02:08:19,770 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 02:08:19,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 02:08:19,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 02:08:19,771 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 02:08:19,771 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 02:08:19,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 02:08:19,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 02:08:19,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 02:08:19,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 02:08:19,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 02:08:19,773 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 02:08:20,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 02:08:20,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 02:08:20,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 02:08:20,304 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 02:08:20,305 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 02:08:20,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-11-07 02:08:20,418 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b8f16a86/1ffb39e352a048e090413a36ffbc1f2e/FLAG23e479022 [2020-11-07 02:08:21,073 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 02:08:21,074 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-11-07 02:08:21,084 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b8f16a86/1ffb39e352a048e090413a36ffbc1f2e/FLAG23e479022 [2020-11-07 02:08:21,470 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b8f16a86/1ffb39e352a048e090413a36ffbc1f2e [2020-11-07 02:08:21,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 02:08:21,485 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 02:08:21,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 02:08:21,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 02:08:21,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 02:08:21,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:08:21" (1/1) ... [2020-11-07 02:08:21,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3397ad59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:21, skipping insertion in model container [2020-11-07 02:08:21,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:08:21" (1/1) ... [2020-11-07 02:08:21,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 02:08:21,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 02:08:21,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:08:21,890 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 02:08:21,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:08:21,941 INFO L208 MainTranslator]: Completed translation [2020-11-07 02:08:21,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:21 WrapperNode [2020-11-07 02:08:21,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 02:08:21,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 02:08:21,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 02:08:21,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 02:08:21,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:21" (1/1) ... [2020-11-07 02:08:21,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:21" (1/1) ... [2020-11-07 02:08:21,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:21" (1/1) ... [2020-11-07 02:08:21,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:21" (1/1) ... [2020-11-07 02:08:22,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:21" (1/1) ... [2020-11-07 02:08:22,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:21" (1/1) ... [2020-11-07 02:08:22,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:21" (1/1) ... [2020-11-07 02:08:22,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 02:08:22,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 02:08:22,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 02:08:22,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 02:08:22,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:21" (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 [2020-11-07 02:08:22,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 02:08:22,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 02:08:22,142 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 02:08:22,142 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 02:08:22,142 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 02:08:22,142 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 02:08:22,143 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 02:08:22,143 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 02:08:22,143 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 02:08:22,143 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 02:08:22,143 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 02:08:22,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 02:08:22,144 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 02:08:22,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 02:08:22,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 02:08:22,144 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 02:08:22,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 02:08:22,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 02:08:22,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 02:08:22,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 02:08:22,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 02:08:22,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 02:08:22,487 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 02:08:22,488 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 02:08:22,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:08:22 BoogieIcfgContainer [2020-11-07 02:08:22,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 02:08:22,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 02:08:22,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 02:08:22,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 02:08:22,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:08:21" (1/3) ... [2020-11-07 02:08:22,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149bb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:08:22, skipping insertion in model container [2020-11-07 02:08:22,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:21" (2/3) ... [2020-11-07 02:08:22,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149bb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:08:22, skipping insertion in model container [2020-11-07 02:08:22,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:08:22" (3/3) ... [2020-11-07 02:08:22,508 INFO L111 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-11-07 02:08:22,533 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 02:08:22,539 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 02:08:22,559 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 02:08:22,619 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 02:08:22,619 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 02:08:22,619 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 02:08:22,620 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 02:08:22,620 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 02:08:22,620 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 02:08:22,620 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 02:08:22,621 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 02:08:22,669 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-11-07 02:08:22,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-07 02:08:22,701 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:22,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:22,706 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:22,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:22,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1975152354, now seen corresponding path program 1 times [2020-11-07 02:08:22,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:22,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822493571] [2020-11-07 02:08:22,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:22,839 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:23,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:23,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822493571] [2020-11-07 02:08:23,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:23,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 02:08:23,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141660407] [2020-11-07 02:08:23,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 02:08:23,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:23,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 02:08:23,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 02:08:23,123 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2020-11-07 02:08:23,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:23,311 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-11-07 02:08:23,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 02:08:23,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-11-07 02:08:23,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:23,335 INFO L225 Difference]: With dead ends: 56 [2020-11-07 02:08:23,336 INFO L226 Difference]: Without dead ends: 31 [2020-11-07 02:08:23,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 02:08:23,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-07 02:08:23,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-07 02:08:23,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-07 02:08:23,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-11-07 02:08:23,419 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 20 [2020-11-07 02:08:23,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:23,420 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-11-07 02:08:23,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 02:08:23,420 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-11-07 02:08:23,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-07 02:08:23,422 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:23,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:23,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 02:08:23,423 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:23,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:23,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1632308722, now seen corresponding path program 1 times [2020-11-07 02:08:23,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:23,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918182196] [2020-11-07 02:08:23,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:23,430 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:23,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:23,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918182196] [2020-11-07 02:08:23,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:23,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 02:08:23,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114951078] [2020-11-07 02:08:23,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 02:08:23,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:23,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 02:08:23,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:08:23,747 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 7 states. [2020-11-07 02:08:24,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:24,386 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-11-07 02:08:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 02:08:24,387 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-11-07 02:08:24,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:24,389 INFO L225 Difference]: With dead ends: 49 [2020-11-07 02:08:24,390 INFO L226 Difference]: Without dead ends: 40 [2020-11-07 02:08:24,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-11-07 02:08:24,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-07 02:08:24,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-11-07 02:08:24,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-07 02:08:24,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-11-07 02:08:24,406 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 24 [2020-11-07 02:08:24,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:24,407 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-11-07 02:08:24,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 02:08:24,408 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-11-07 02:08:24,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-07 02:08:24,409 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:24,409 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:24,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 02:08:24,410 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:24,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:24,411 INFO L82 PathProgramCache]: Analyzing trace with hash -7380593, now seen corresponding path program 1 times [2020-11-07 02:08:24,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:24,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389745775] [2020-11-07 02:08:24,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:24,438 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:24,440 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:24,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:24,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:24,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389745775] [2020-11-07 02:08:24,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:24,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 02:08:24,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850136639] [2020-11-07 02:08:24,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 02:08:24,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:24,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 02:08:24,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:08:24,540 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 4 states. [2020-11-07 02:08:24,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:24,715 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-11-07 02:08:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 02:08:24,716 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-11-07 02:08:24,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:24,717 INFO L225 Difference]: With dead ends: 56 [2020-11-07 02:08:24,718 INFO L226 Difference]: Without dead ends: 37 [2020-11-07 02:08:24,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:08:24,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-07 02:08:24,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-07 02:08:24,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-07 02:08:24,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-11-07 02:08:24,730 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2020-11-07 02:08:24,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:24,731 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-11-07 02:08:24,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 02:08:24,731 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-11-07 02:08:24,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-07 02:08:24,733 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:24,733 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:24,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 02:08:24,733 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:24,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:24,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1203694188, now seen corresponding path program 1 times [2020-11-07 02:08:24,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:24,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167480492] [2020-11-07 02:08:24,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:24,867 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-11-07 02:08:24,927 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:24,929 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:25,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:25,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:25,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167480492] [2020-11-07 02:08:25,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:25,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 02:08:25,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54844289] [2020-11-07 02:08:25,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 02:08:25,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:25,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 02:08:25,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-07 02:08:25,065 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 6 states. [2020-11-07 02:08:25,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:25,532 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-11-07 02:08:25,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 02:08:25,534 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-11-07 02:08:25,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:25,537 INFO L225 Difference]: With dead ends: 63 [2020-11-07 02:08:25,537 INFO L226 Difference]: Without dead ends: 53 [2020-11-07 02:08:25,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-11-07 02:08:25,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-07 02:08:25,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2020-11-07 02:08:25,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-07 02:08:25,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-11-07 02:08:25,555 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 33 [2020-11-07 02:08:25,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:25,555 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-11-07 02:08:25,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 02:08:25,556 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-11-07 02:08:25,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-07 02:08:25,557 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:25,557 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:25,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 02:08:25,558 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:25,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:25,558 INFO L82 PathProgramCache]: Analyzing trace with hash -944784977, now seen corresponding path program 1 times [2020-11-07 02:08:25,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:25,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463549766] [2020-11-07 02:08:25,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:25,679 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:25,681 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:25,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:25,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463549766] [2020-11-07 02:08:25,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:25,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 02:08:25,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905826797] [2020-11-07 02:08:25,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 02:08:25,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:25,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 02:08:25,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-07 02:08:25,810 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 8 states. [2020-11-07 02:08:26,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:26,158 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-11-07 02:08:26,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 02:08:26,159 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-11-07 02:08:26,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:26,160 INFO L225 Difference]: With dead ends: 58 [2020-11-07 02:08:26,161 INFO L226 Difference]: Without dead ends: 49 [2020-11-07 02:08:26,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-11-07 02:08:26,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-07 02:08:26,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-11-07 02:08:26,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-07 02:08:26,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-11-07 02:08:26,174 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 35 [2020-11-07 02:08:26,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:26,175 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-11-07 02:08:26,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 02:08:26,175 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-11-07 02:08:26,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-07 02:08:26,176 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:26,177 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:26,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 02:08:26,177 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:26,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:26,178 INFO L82 PathProgramCache]: Analyzing trace with hash 2061662002, now seen corresponding path program 2 times [2020-11-07 02:08:26,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:26,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009281657] [2020-11-07 02:08:26,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:26,347 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:26,349 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:26,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:26,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009281657] [2020-11-07 02:08:26,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:26,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 02:08:26,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450486688] [2020-11-07 02:08:26,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 02:08:26,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:26,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 02:08:26,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:08:26,451 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 7 states. [2020-11-07 02:08:26,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:26,892 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-11-07 02:08:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 02:08:26,894 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-11-07 02:08:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:26,899 INFO L225 Difference]: With dead ends: 72 [2020-11-07 02:08:26,899 INFO L226 Difference]: Without dead ends: 62 [2020-11-07 02:08:26,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-11-07 02:08:26,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-07 02:08:26,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2020-11-07 02:08:26,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-07 02:08:26,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-11-07 02:08:26,937 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 42 [2020-11-07 02:08:26,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:26,937 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-11-07 02:08:26,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 02:08:26,938 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-11-07 02:08:26,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-07 02:08:26,942 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:26,942 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:26,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 02:08:26,943 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:26,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:26,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1071436555, now seen corresponding path program 2 times [2020-11-07 02:08:26,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:26,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635662437] [2020-11-07 02:08:26,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:27,109 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:27,111 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:27,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:27,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635662437] [2020-11-07 02:08:27,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:27,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 02:08:27,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127460922] [2020-11-07 02:08:27,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 02:08:27,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:27,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 02:08:27,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-11-07 02:08:27,300 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 10 states. [2020-11-07 02:08:27,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:27,791 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-11-07 02:08:27,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 02:08:27,792 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-11-07 02:08:27,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:27,793 INFO L225 Difference]: With dead ends: 67 [2020-11-07 02:08:27,794 INFO L226 Difference]: Without dead ends: 58 [2020-11-07 02:08:27,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-11-07 02:08:27,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-07 02:08:27,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-11-07 02:08:27,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-07 02:08:27,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-11-07 02:08:27,821 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 44 [2020-11-07 02:08:27,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:27,822 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-11-07 02:08:27,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 02:08:27,822 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-11-07 02:08:27,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-07 02:08:27,823 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:27,823 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:27,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 02:08:27,824 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:27,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:27,824 INFO L82 PathProgramCache]: Analyzing trace with hash 969533740, now seen corresponding path program 3 times [2020-11-07 02:08:27,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:27,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322549736] [2020-11-07 02:08:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:27,999 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:28,001 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:28,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:28,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:28,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322549736] [2020-11-07 02:08:28,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:28,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 02:08:28,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200426225] [2020-11-07 02:08:28,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 02:08:28,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:28,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 02:08:28,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-07 02:08:28,142 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 8 states. [2020-11-07 02:08:28,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:28,631 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-11-07 02:08:28,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 02:08:28,633 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-11-07 02:08:28,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:28,635 INFO L225 Difference]: With dead ends: 81 [2020-11-07 02:08:28,635 INFO L226 Difference]: Without dead ends: 71 [2020-11-07 02:08:28,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-11-07 02:08:28,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-07 02:08:28,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2020-11-07 02:08:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-07 02:08:28,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-11-07 02:08:28,654 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 51 [2020-11-07 02:08:28,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:28,655 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-11-07 02:08:28,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 02:08:28,655 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-11-07 02:08:28,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-07 02:08:28,656 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:28,656 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:28,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 02:08:28,657 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:28,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:28,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1660291183, now seen corresponding path program 3 times [2020-11-07 02:08:28,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:28,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813788815] [2020-11-07 02:08:28,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:28,820 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:28,822 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:29,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:29,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:29,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813788815] [2020-11-07 02:08:29,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:29,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 02:08:29,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196165950] [2020-11-07 02:08:29,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 02:08:29,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:29,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 02:08:29,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-11-07 02:08:29,041 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 12 states. [2020-11-07 02:08:29,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:29,872 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2020-11-07 02:08:29,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-07 02:08:29,874 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-11-07 02:08:29,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:29,876 INFO L225 Difference]: With dead ends: 89 [2020-11-07 02:08:29,879 INFO L226 Difference]: Without dead ends: 76 [2020-11-07 02:08:29,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2020-11-07 02:08:29,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-07 02:08:29,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-11-07 02:08:29,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-07 02:08:29,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-11-07 02:08:29,927 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 53 [2020-11-07 02:08:29,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:29,927 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-11-07 02:08:29,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 02:08:29,928 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-11-07 02:08:29,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-11-07 02:08:29,936 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:29,937 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:29,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 02:08:29,939 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:29,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:29,940 INFO L82 PathProgramCache]: Analyzing trace with hash -904218644, now seen corresponding path program 4 times [2020-11-07 02:08:29,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:29,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026402746] [2020-11-07 02:08:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:30,117 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:30,119 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:30,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:30,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026402746] [2020-11-07 02:08:30,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:30,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 02:08:30,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304822661] [2020-11-07 02:08:30,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 02:08:30,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:30,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 02:08:30,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-11-07 02:08:30,280 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 10 states. [2020-11-07 02:08:30,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:30,993 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-11-07 02:08:30,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 02:08:30,994 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-11-07 02:08:30,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:30,996 INFO L225 Difference]: With dead ends: 99 [2020-11-07 02:08:30,996 INFO L226 Difference]: Without dead ends: 89 [2020-11-07 02:08:30,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2020-11-07 02:08:30,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-07 02:08:31,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-11-07 02:08:31,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-07 02:08:31,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-11-07 02:08:31,047 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 69 [2020-11-07 02:08:31,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:31,049 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-11-07 02:08:31,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 02:08:31,049 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-11-07 02:08:31,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-07 02:08:31,056 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:31,057 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:31,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 02:08:31,057 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:31,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:31,058 INFO L82 PathProgramCache]: Analyzing trace with hash 575547183, now seen corresponding path program 4 times [2020-11-07 02:08:31,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:31,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625556100] [2020-11-07 02:08:31,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:31,231 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:31,234 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:31,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:31,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625556100] [2020-11-07 02:08:31,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:31,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 02:08:31,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242691626] [2020-11-07 02:08:31,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 02:08:31,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:31,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 02:08:31,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-11-07 02:08:31,606 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 16 states. [2020-11-07 02:08:32,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:32,798 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2020-11-07 02:08:32,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 02:08:32,799 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-11-07 02:08:32,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:32,800 INFO L225 Difference]: With dead ends: 107 [2020-11-07 02:08:32,801 INFO L226 Difference]: Without dead ends: 94 [2020-11-07 02:08:32,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2020-11-07 02:08:32,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-07 02:08:32,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2020-11-07 02:08:32,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-07 02:08:32,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-11-07 02:08:32,826 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 71 [2020-11-07 02:08:32,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:32,827 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-11-07 02:08:32,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 02:08:32,827 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-11-07 02:08:32,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-11-07 02:08:32,829 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:32,829 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:32,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 02:08:32,829 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:32,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:32,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1088247468, now seen corresponding path program 5 times [2020-11-07 02:08:32,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:32,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050086189] [2020-11-07 02:08:32,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:32,989 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:32,991 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:33,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:33,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050086189] [2020-11-07 02:08:33,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:33,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 02:08:33,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908654927] [2020-11-07 02:08:33,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 02:08:33,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:33,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 02:08:33,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-11-07 02:08:33,186 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 12 states. [2020-11-07 02:08:34,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:34,091 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2020-11-07 02:08:34,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-07 02:08:34,094 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 87 [2020-11-07 02:08:34,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:34,096 INFO L225 Difference]: With dead ends: 117 [2020-11-07 02:08:34,096 INFO L226 Difference]: Without dead ends: 107 [2020-11-07 02:08:34,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=531, Unknown=0, NotChecked=0, Total=812 [2020-11-07 02:08:34,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-07 02:08:34,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 97. [2020-11-07 02:08:34,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-07 02:08:34,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-11-07 02:08:34,144 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 87 [2020-11-07 02:08:34,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:34,144 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-11-07 02:08:34,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 02:08:34,144 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-11-07 02:08:34,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-11-07 02:08:34,145 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:34,146 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:34,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 02:08:34,146 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:34,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:34,147 INFO L82 PathProgramCache]: Analyzing trace with hash -219933201, now seen corresponding path program 5 times [2020-11-07 02:08:34,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:34,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36700179] [2020-11-07 02:08:34,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:34,296 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:34,298 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:34,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:34,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36700179] [2020-11-07 02:08:34,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:34,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-11-07 02:08:34,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459647804] [2020-11-07 02:08:34,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 02:08:34,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:34,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 02:08:34,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-11-07 02:08:34,702 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 20 states. [2020-11-07 02:08:36,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:36,392 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2020-11-07 02:08:36,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 02:08:36,393 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2020-11-07 02:08:36,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:36,395 INFO L225 Difference]: With dead ends: 125 [2020-11-07 02:08:36,395 INFO L226 Difference]: Without dead ends: 112 [2020-11-07 02:08:36,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=159, Invalid=1323, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 02:08:36,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-07 02:08:36,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2020-11-07 02:08:36,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-07 02:08:36,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2020-11-07 02:08:36,437 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 89 [2020-11-07 02:08:36,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:36,438 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2020-11-07 02:08:36,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 02:08:36,438 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2020-11-07 02:08:36,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-07 02:08:36,439 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:36,439 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:36,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 02:08:36,440 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:36,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:36,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1287797396, now seen corresponding path program 6 times [2020-11-07 02:08:36,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:36,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761800813] [2020-11-07 02:08:36,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:36,595 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:36,598 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:36,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:36,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761800813] [2020-11-07 02:08:36,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:36,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-07 02:08:36,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812877169] [2020-11-07 02:08:36,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 02:08:36,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:36,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 02:08:36,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-11-07 02:08:36,885 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 14 states. [2020-11-07 02:08:38,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:38,115 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2020-11-07 02:08:38,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 02:08:38,116 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 105 [2020-11-07 02:08:38,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:38,117 INFO L225 Difference]: With dead ends: 135 [2020-11-07 02:08:38,117 INFO L226 Difference]: Without dead ends: 125 [2020-11-07 02:08:38,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=409, Invalid=781, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 02:08:38,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-11-07 02:08:38,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2020-11-07 02:08:38,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-11-07 02:08:38,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2020-11-07 02:08:38,147 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 105 [2020-11-07 02:08:38,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:38,147 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2020-11-07 02:08:38,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 02:08:38,147 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2020-11-07 02:08:38,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-11-07 02:08:38,148 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:38,149 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:38,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 02:08:38,149 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:38,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:38,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1323553967, now seen corresponding path program 6 times [2020-11-07 02:08:38,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:38,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802453016] [2020-11-07 02:08:38,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:38,311 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:38,313 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:38,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:38,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802453016] [2020-11-07 02:08:38,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:38,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-11-07 02:08:38,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492120081] [2020-11-07 02:08:38,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 02:08:38,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:38,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 02:08:38,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2020-11-07 02:08:38,844 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 24 states. [2020-11-07 02:08:41,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:41,145 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2020-11-07 02:08:41,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-07 02:08:41,146 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 107 [2020-11-07 02:08:41,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:41,147 INFO L225 Difference]: With dead ends: 143 [2020-11-07 02:08:41,147 INFO L226 Difference]: Without dead ends: 130 [2020-11-07 02:08:41,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=195, Invalid=1967, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 02:08:41,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-07 02:08:41,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-11-07 02:08:41,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-11-07 02:08:41,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-11-07 02:08:41,175 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 107 [2020-11-07 02:08:41,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:41,176 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-11-07 02:08:41,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 02:08:41,176 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-11-07 02:08:41,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-11-07 02:08:41,177 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:41,177 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:41,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 02:08:41,178 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:41,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:41,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1016593364, now seen corresponding path program 7 times [2020-11-07 02:08:41,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:41,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303356507] [2020-11-07 02:08:41,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:41,345 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:41,347 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:41,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:41,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:41,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303356507] [2020-11-07 02:08:41,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:41,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 02:08:41,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033289316] [2020-11-07 02:08:41,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 02:08:41,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:41,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 02:08:41,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-11-07 02:08:41,727 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 16 states. [2020-11-07 02:08:43,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:43,193 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2020-11-07 02:08:43,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-07 02:08:43,194 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 123 [2020-11-07 02:08:43,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:43,196 INFO L225 Difference]: With dead ends: 153 [2020-11-07 02:08:43,196 INFO L226 Difference]: Without dead ends: 143 [2020-11-07 02:08:43,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=561, Invalid=1079, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 02:08:43,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-11-07 02:08:43,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 133. [2020-11-07 02:08:43,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-11-07 02:08:43,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2020-11-07 02:08:43,231 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 123 [2020-11-07 02:08:43,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:43,231 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2020-11-07 02:08:43,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 02:08:43,231 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2020-11-07 02:08:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-11-07 02:08:43,233 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:43,233 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:43,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 02:08:43,234 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:43,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:43,234 INFO L82 PathProgramCache]: Analyzing trace with hash -42376337, now seen corresponding path program 7 times [2020-11-07 02:08:43,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:43,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938418492] [2020-11-07 02:08:43,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:43,405 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:43,407 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:43,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:44,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938418492] [2020-11-07 02:08:44,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:44,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-11-07 02:08:44,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182100093] [2020-11-07 02:08:44,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 02:08:44,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:44,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 02:08:44,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2020-11-07 02:08:44,048 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 28 states. [2020-11-07 02:08:46,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:46,875 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2020-11-07 02:08:46,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 02:08:46,876 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 125 [2020-11-07 02:08:46,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:46,877 INFO L225 Difference]: With dead ends: 161 [2020-11-07 02:08:46,877 INFO L226 Difference]: Without dead ends: 148 [2020-11-07 02:08:46,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=231, Invalid=2739, Unknown=0, NotChecked=0, Total=2970 [2020-11-07 02:08:46,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-11-07 02:08:46,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 145. [2020-11-07 02:08:46,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-07 02:08:46,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2020-11-07 02:08:46,926 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 125 [2020-11-07 02:08:46,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:46,927 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2020-11-07 02:08:46,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 02:08:46,927 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2020-11-07 02:08:46,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-07 02:08:46,929 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:46,929 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:46,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 02:08:46,929 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:46,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:46,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1619530476, now seen corresponding path program 8 times [2020-11-07 02:08:46,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:46,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427033409] [2020-11-07 02:08:46,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:47,094 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:47,096 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:47,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:47,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427033409] [2020-11-07 02:08:47,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:47,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-11-07 02:08:47,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030298073] [2020-11-07 02:08:47,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 02:08:47,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:47,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 02:08:47,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-11-07 02:08:47,419 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 18 states. [2020-11-07 02:08:49,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:49,112 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2020-11-07 02:08:49,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-07 02:08:49,113 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 141 [2020-11-07 02:08:49,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:49,115 INFO L225 Difference]: With dead ends: 171 [2020-11-07 02:08:49,115 INFO L226 Difference]: Without dead ends: 161 [2020-11-07 02:08:49,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=737, Invalid=1425, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 02:08:49,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-11-07 02:08:49,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 151. [2020-11-07 02:08:49,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-11-07 02:08:49,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2020-11-07 02:08:49,155 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 141 [2020-11-07 02:08:49,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:49,156 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2020-11-07 02:08:49,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 02:08:49,156 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2020-11-07 02:08:49,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-11-07 02:08:49,157 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:49,158 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:49,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 02:08:49,158 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:49,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:49,159 INFO L82 PathProgramCache]: Analyzing trace with hash -758070737, now seen corresponding path program 8 times [2020-11-07 02:08:49,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:49,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433355815] [2020-11-07 02:08:49,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:49,323 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:49,324 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:50,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:50,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433355815] [2020-11-07 02:08:50,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:50,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-11-07 02:08:50,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597331769] [2020-11-07 02:08:50,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-07 02:08:50,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:50,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-07 02:08:50,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2020-11-07 02:08:50,152 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 32 states. [2020-11-07 02:08:53,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:53,854 INFO L93 Difference]: Finished difference Result 179 states and 182 transitions. [2020-11-07 02:08:53,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-07 02:08:53,855 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 143 [2020-11-07 02:08:53,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:53,857 INFO L225 Difference]: With dead ends: 179 [2020-11-07 02:08:53,857 INFO L226 Difference]: Without dead ends: 166 [2020-11-07 02:08:53,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=267, Invalid=3639, Unknown=0, NotChecked=0, Total=3906 [2020-11-07 02:08:53,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-11-07 02:08:53,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2020-11-07 02:08:53,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-11-07 02:08:53,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2020-11-07 02:08:53,901 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 143 [2020-11-07 02:08:53,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:53,901 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2020-11-07 02:08:53,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-07 02:08:53,901 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2020-11-07 02:08:53,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-11-07 02:08:53,903 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:53,903 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:53,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 02:08:53,903 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:53,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:53,904 INFO L82 PathProgramCache]: Analyzing trace with hash -2033585748, now seen corresponding path program 9 times [2020-11-07 02:08:53,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:53,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72527301] [2020-11-07 02:08:53,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:54,077 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:54,079 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:54,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:54,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72527301] [2020-11-07 02:08:54,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:54,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-11-07 02:08:54,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063902335] [2020-11-07 02:08:54,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 02:08:54,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:54,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 02:08:54,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-11-07 02:08:54,433 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 20 states. [2020-11-07 02:08:56,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:56,401 INFO L93 Difference]: Finished difference Result 189 states and 191 transitions. [2020-11-07 02:08:56,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 02:08:56,402 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 159 [2020-11-07 02:08:56,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:56,404 INFO L225 Difference]: With dead ends: 189 [2020-11-07 02:08:56,404 INFO L226 Difference]: Without dead ends: 179 [2020-11-07 02:08:56,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=937, Invalid=1819, Unknown=0, NotChecked=0, Total=2756 [2020-11-07 02:08:56,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-07 02:08:56,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 169. [2020-11-07 02:08:56,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-11-07 02:08:56,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2020-11-07 02:08:56,441 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 159 [2020-11-07 02:08:56,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:56,441 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2020-11-07 02:08:56,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 02:08:56,442 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2020-11-07 02:08:56,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-11-07 02:08:56,444 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:56,444 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:56,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 02:08:56,444 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:56,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:56,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1880486127, now seen corresponding path program 9 times [2020-11-07 02:08:56,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:56,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824184884] [2020-11-07 02:08:56,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:56,605 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:56,607 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:57,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:57,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824184884] [2020-11-07 02:08:57,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:57,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-11-07 02:08:57,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056559384] [2020-11-07 02:08:57,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-07 02:08:57,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:57,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-07 02:08:57,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1176, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 02:08:57,625 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 36 states. [2020-11-07 02:09:02,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:09:02,015 INFO L93 Difference]: Finished difference Result 197 states and 200 transitions. [2020-11-07 02:09:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-07 02:09:02,016 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 161 [2020-11-07 02:09:02,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:09:02,017 INFO L225 Difference]: With dead ends: 197 [2020-11-07 02:09:02,018 INFO L226 Difference]: Without dead ends: 184 [2020-11-07 02:09:02,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=303, Invalid=4667, Unknown=0, NotChecked=0, Total=4970 [2020-11-07 02:09:02,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-11-07 02:09:02,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 181. [2020-11-07 02:09:02,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-11-07 02:09:02,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2020-11-07 02:09:02,078 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 161 [2020-11-07 02:09:02,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:09:02,079 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2020-11-07 02:09:02,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-07 02:09:02,079 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2020-11-07 02:09:02,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-11-07 02:09:02,081 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:09:02,081 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:09:02,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 02:09:02,082 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:09:02,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:09:02,082 INFO L82 PathProgramCache]: Analyzing trace with hash -10903444, now seen corresponding path program 10 times [2020-11-07 02:09:02,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:09:02,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116828576] [2020-11-07 02:09:02,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:09:02,256 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:09:02,258 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:09:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:02,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:09:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:09:02,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116828576] [2020-11-07 02:09:02,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:09:02,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-11-07 02:09:02,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146288337] [2020-11-07 02:09:02,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 02:09:02,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:09:02,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 02:09:02,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-11-07 02:09:02,706 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 22 states. [2020-11-07 02:09:05,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:09:05,071 INFO L93 Difference]: Finished difference Result 207 states and 209 transitions. [2020-11-07 02:09:05,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-07 02:09:05,075 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 177 [2020-11-07 02:09:05,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:09:05,077 INFO L225 Difference]: With dead ends: 207 [2020-11-07 02:09:05,077 INFO L226 Difference]: Without dead ends: 197 [2020-11-07 02:09:05,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1161, Invalid=2261, Unknown=0, NotChecked=0, Total=3422 [2020-11-07 02:09:05,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-11-07 02:09:05,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 187. [2020-11-07 02:09:05,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-11-07 02:09:05,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2020-11-07 02:09:05,126 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 177 [2020-11-07 02:09:05,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:09:05,127 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2020-11-07 02:09:05,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 02:09:05,127 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2020-11-07 02:09:05,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-11-07 02:09:05,128 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:09:05,128 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:09:05,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 02:09:05,129 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:09:05,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:09:05,129 INFO L82 PathProgramCache]: Analyzing trace with hash 57995183, now seen corresponding path program 10 times [2020-11-07 02:09:05,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:09:05,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765687436] [2020-11-07 02:09:05,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:09:05,301 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:09:05,303 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:09:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:06,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:09:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:09:06,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765687436] [2020-11-07 02:09:06,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:09:06,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-11-07 02:09:06,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464709210] [2020-11-07 02:09:06,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-07 02:09:06,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:09:06,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-07 02:09:06,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1466, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 02:09:06,522 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 40 states. [2020-11-07 02:09:12,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:09:12,011 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2020-11-07 02:09:12,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-07 02:09:12,013 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 179 [2020-11-07 02:09:12,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:09:12,014 INFO L225 Difference]: With dead ends: 215 [2020-11-07 02:09:12,014 INFO L226 Difference]: Without dead ends: 202 [2020-11-07 02:09:12,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1589 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=339, Invalid=5823, Unknown=0, NotChecked=0, Total=6162 [2020-11-07 02:09:12,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-11-07 02:09:12,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2020-11-07 02:09:12,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-11-07 02:09:12,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2020-11-07 02:09:12,091 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 179 [2020-11-07 02:09:12,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:09:12,091 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2020-11-07 02:09:12,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-07 02:09:12,092 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2020-11-07 02:09:12,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-11-07 02:09:12,093 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:09:12,094 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:09:12,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-07 02:09:12,094 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:09:12,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:09:12,095 INFO L82 PathProgramCache]: Analyzing trace with hash 543366956, now seen corresponding path program 11 times [2020-11-07 02:09:12,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:09:12,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189250860] [2020-11-07 02:09:12,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:09:12,250 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:09:12,252 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:09:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:12,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:09:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:09:12,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189250860] [2020-11-07 02:09:12,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:09:12,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-11-07 02:09:12,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955795495] [2020-11-07 02:09:12,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 02:09:12,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:09:12,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 02:09:12,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-11-07 02:09:12,821 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 24 states. [2020-11-07 02:09:15,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:09:15,476 INFO L93 Difference]: Finished difference Result 225 states and 227 transitions. [2020-11-07 02:09:15,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-07 02:09:15,477 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 195 [2020-11-07 02:09:15,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:09:15,479 INFO L225 Difference]: With dead ends: 225 [2020-11-07 02:09:15,479 INFO L226 Difference]: Without dead ends: 215 [2020-11-07 02:09:15,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1409, Invalid=2751, Unknown=0, NotChecked=0, Total=4160 [2020-11-07 02:09:15,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-11-07 02:09:15,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 205. [2020-11-07 02:09:15,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-11-07 02:09:15,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2020-11-07 02:09:15,540 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 195 [2020-11-07 02:09:15,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:09:15,540 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2020-11-07 02:09:15,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 02:09:15,541 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2020-11-07 02:09:15,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-11-07 02:09:15,542 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:09:15,542 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:09:15,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-07 02:09:15,543 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:09:15,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:09:15,543 INFO L82 PathProgramCache]: Analyzing trace with hash 135904879, now seen corresponding path program 11 times [2020-11-07 02:09:15,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:09:15,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311253803] [2020-11-07 02:09:15,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:09:15,721 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:09:15,722 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:09:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:17,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:09:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:09:17,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311253803] [2020-11-07 02:09:17,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:09:17,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-11-07 02:09:17,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618187566] [2020-11-07 02:09:17,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-07 02:09:17,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:09:17,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-07 02:09:17,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1788, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 02:09:17,225 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand 44 states. [2020-11-07 02:09:23,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:09:23,811 INFO L93 Difference]: Finished difference Result 233 states and 236 transitions. [2020-11-07 02:09:23,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-07 02:09:23,812 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 197 [2020-11-07 02:09:23,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:09:23,814 INFO L225 Difference]: With dead ends: 233 [2020-11-07 02:09:23,814 INFO L226 Difference]: Without dead ends: 220 [2020-11-07 02:09:23,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1965 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=375, Invalid=7107, Unknown=0, NotChecked=0, Total=7482 [2020-11-07 02:09:23,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-11-07 02:09:23,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2020-11-07 02:09:23,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-11-07 02:09:23,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2020-11-07 02:09:23,899 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 197 [2020-11-07 02:09:23,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:09:23,900 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2020-11-07 02:09:23,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-07 02:09:23,900 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2020-11-07 02:09:23,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-11-07 02:09:23,902 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:09:23,903 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:09:23,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-07 02:09:23,903 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:09:23,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:09:23,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1928172052, now seen corresponding path program 12 times [2020-11-07 02:09:23,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:09:23,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885689085] [2020-11-07 02:09:23,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:09:24,072 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:09:24,074 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:09:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:24,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:09:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:09:24,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885689085] [2020-11-07 02:09:24,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:09:24,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-11-07 02:09:24,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324383152] [2020-11-07 02:09:24,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-07 02:09:24,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:09:24,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-07 02:09:24,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-11-07 02:09:24,644 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand 26 states. [2020-11-07 02:09:27,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:09:27,755 INFO L93 Difference]: Finished difference Result 243 states and 245 transitions. [2020-11-07 02:09:27,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-07 02:09:27,756 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 213 [2020-11-07 02:09:27,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:09:27,759 INFO L225 Difference]: With dead ends: 243 [2020-11-07 02:09:27,759 INFO L226 Difference]: Without dead ends: 233 [2020-11-07 02:09:27,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1681, Invalid=3289, Unknown=0, NotChecked=0, Total=4970 [2020-11-07 02:09:27,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-11-07 02:09:27,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 223. [2020-11-07 02:09:27,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-11-07 02:09:27,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2020-11-07 02:09:27,858 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 213 [2020-11-07 02:09:27,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:09:27,859 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2020-11-07 02:09:27,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-07 02:09:27,860 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2020-11-07 02:09:27,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-11-07 02:09:27,862 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:09:27,862 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:09:27,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-07 02:09:27,862 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:09:27,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:09:27,863 INFO L82 PathProgramCache]: Analyzing trace with hash 103832879, now seen corresponding path program 12 times [2020-11-07 02:09:27,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:09:27,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217057485] [2020-11-07 02:09:27,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:09:28,042 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:09:28,044 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:09:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:29,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:09:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:09:29,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217057485] [2020-11-07 02:09:29,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:09:29,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2020-11-07 02:09:29,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453917874] [2020-11-07 02:09:29,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-11-07 02:09:29,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:09:29,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-11-07 02:09:29,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=2142, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 02:09:29,824 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand 48 states. [2020-11-07 02:09:37,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:09:37,686 INFO L93 Difference]: Finished difference Result 251 states and 254 transitions. [2020-11-07 02:09:37,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-07 02:09:37,687 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 215 [2020-11-07 02:09:37,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:09:37,689 INFO L225 Difference]: With dead ends: 251 [2020-11-07 02:09:37,689 INFO L226 Difference]: Without dead ends: 238 [2020-11-07 02:09:37,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2381 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=411, Invalid=8519, Unknown=0, NotChecked=0, Total=8930 [2020-11-07 02:09:37,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-11-07 02:09:37,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 235. [2020-11-07 02:09:37,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-11-07 02:09:37,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2020-11-07 02:09:37,765 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 215 [2020-11-07 02:09:37,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:09:37,766 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2020-11-07 02:09:37,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-11-07 02:09:37,766 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2020-11-07 02:09:37,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-11-07 02:09:37,768 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:09:37,768 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:09:37,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-07 02:09:37,768 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:09:37,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:09:37,769 INFO L82 PathProgramCache]: Analyzing trace with hash -174879572, now seen corresponding path program 13 times [2020-11-07 02:09:37,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:09:37,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689099673] [2020-11-07 02:09:37,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:09:37,957 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:09:37,958 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:09:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:38,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:09:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:09:38,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689099673] [2020-11-07 02:09:38,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:09:38,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-11-07 02:09:38,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56834054] [2020-11-07 02:09:38,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 02:09:38,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:09:38,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 02:09:38,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-11-07 02:09:38,743 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand 28 states. [2020-11-07 02:09:42,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:09:42,290 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2020-11-07 02:09:42,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-07 02:09:42,291 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 231 [2020-11-07 02:09:42,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:09:42,294 INFO L225 Difference]: With dead ends: 261 [2020-11-07 02:09:42,294 INFO L226 Difference]: Without dead ends: 251 [2020-11-07 02:09:42,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1977, Invalid=3875, Unknown=0, NotChecked=0, Total=5852 [2020-11-07 02:09:42,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-11-07 02:09:42,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 241. [2020-11-07 02:09:42,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-11-07 02:09:42,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2020-11-07 02:09:42,354 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 231 [2020-11-07 02:09:42,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:09:42,354 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2020-11-07 02:09:42,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 02:09:42,354 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2020-11-07 02:09:42,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-11-07 02:09:42,356 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:09:42,356 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:09:42,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-07 02:09:42,356 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:09:42,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:09:42,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1390726127, now seen corresponding path program 13 times [2020-11-07 02:09:42,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:09:42,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373901035] [2020-11-07 02:09:42,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:09:42,540 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:09:42,542 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:09:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:44,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:09:44,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:09:44,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373901035] [2020-11-07 02:09:44,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:09:44,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2020-11-07 02:09:44,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672664604] [2020-11-07 02:09:44,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-11-07 02:09:44,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:09:44,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-11-07 02:09:44,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=2528, Unknown=0, NotChecked=0, Total=2652 [2020-11-07 02:09:44,661 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand 52 states. [2020-11-07 02:09:53,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:09:53,924 INFO L93 Difference]: Finished difference Result 269 states and 272 transitions. [2020-11-07 02:09:53,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-07 02:09:53,925 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 233 [2020-11-07 02:09:53,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:09:53,928 INFO L225 Difference]: With dead ends: 269 [2020-11-07 02:09:53,928 INFO L226 Difference]: Without dead ends: 256 [2020-11-07 02:09:53,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2837 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=447, Invalid=10059, Unknown=0, NotChecked=0, Total=10506 [2020-11-07 02:09:53,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-11-07 02:09:54,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 253. [2020-11-07 02:09:54,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-11-07 02:09:54,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2020-11-07 02:09:54,033 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 233 [2020-11-07 02:09:54,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:09:54,033 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2020-11-07 02:09:54,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-11-07 02:09:54,033 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2020-11-07 02:09:54,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-11-07 02:09:54,035 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:09:54,035 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:09:54,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-07 02:09:54,036 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:09:54,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:09:54,037 INFO L82 PathProgramCache]: Analyzing trace with hash -686654612, now seen corresponding path program 14 times [2020-11-07 02:09:54,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:09:54,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500999370] [2020-11-07 02:09:54,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:09:54,228 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:09:54,230 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:09:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:55,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:09:55,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:09:55,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500999370] [2020-11-07 02:09:55,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:09:55,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-11-07 02:09:55,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293491976] [2020-11-07 02:09:55,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-07 02:09:55,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:09:55,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-07 02:09:55,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-11-07 02:09:55,085 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand 30 states. [2020-11-07 02:09:58,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:09:58,945 INFO L93 Difference]: Finished difference Result 279 states and 281 transitions. [2020-11-07 02:09:58,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-07 02:09:58,946 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 249 [2020-11-07 02:09:58,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:09:58,949 INFO L225 Difference]: With dead ends: 279 [2020-11-07 02:09:58,950 INFO L226 Difference]: Without dead ends: 269 [2020-11-07 02:09:58,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2297, Invalid=4509, Unknown=0, NotChecked=0, Total=6806 [2020-11-07 02:09:58,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-11-07 02:09:59,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 259. [2020-11-07 02:09:59,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-11-07 02:09:59,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2020-11-07 02:09:59,066 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 249 [2020-11-07 02:09:59,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:09:59,067 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2020-11-07 02:09:59,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-07 02:09:59,067 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2020-11-07 02:09:59,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-11-07 02:09:59,069 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:09:59,069 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:09:59,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-07 02:09:59,069 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:09:59,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:09:59,070 INFO L82 PathProgramCache]: Analyzing trace with hash -798815569, now seen corresponding path program 14 times [2020-11-07 02:09:59,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:09:59,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052823696] [2020-11-07 02:09:59,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:09:59,258 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:09:59,259 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:09:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:01,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:10:01,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:10:01,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052823696] [2020-11-07 02:10:01,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:10:01,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2020-11-07 02:10:01,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925463160] [2020-11-07 02:10:01,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-11-07 02:10:01,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:10:01,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-11-07 02:10:01,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2946, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 02:10:01,752 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand 56 states. [2020-11-07 02:10:12,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:10:12,544 INFO L93 Difference]: Finished difference Result 287 states and 290 transitions. [2020-11-07 02:10:12,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-11-07 02:10:12,545 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 251 [2020-11-07 02:10:12,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:10:12,547 INFO L225 Difference]: With dead ends: 287 [2020-11-07 02:10:12,548 INFO L226 Difference]: Without dead ends: 274 [2020-11-07 02:10:12,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3333 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=483, Invalid=11727, Unknown=0, NotChecked=0, Total=12210 [2020-11-07 02:10:12,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-11-07 02:10:12,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-11-07 02:10:12,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-11-07 02:10:12,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2020-11-07 02:10:12,626 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 251 [2020-11-07 02:10:12,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:10:12,626 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2020-11-07 02:10:12,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-11-07 02:10:12,626 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2020-11-07 02:10:12,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-11-07 02:10:12,627 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:10:12,627 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:10:12,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-07 02:10:12,628 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:10:12,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:10:12,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1002125868, now seen corresponding path program 15 times [2020-11-07 02:10:12,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:10:12,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264221570] [2020-11-07 02:10:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:10:12,819 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:10:12,820 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:10:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:13,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:10:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:10:13,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264221570] [2020-11-07 02:10:13,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:10:13,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-11-07 02:10:13,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723185347] [2020-11-07 02:10:13,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-07 02:10:13,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:10:13,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-07 02:10:13,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-11-07 02:10:13,778 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand 32 states. [2020-11-07 02:10:18,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:10:18,343 INFO L93 Difference]: Finished difference Result 297 states and 299 transitions. [2020-11-07 02:10:18,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-07 02:10:18,345 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 267 [2020-11-07 02:10:18,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:10:18,348 INFO L225 Difference]: With dead ends: 297 [2020-11-07 02:10:18,348 INFO L226 Difference]: Without dead ends: 287 [2020-11-07 02:10:18,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2641, Invalid=5191, Unknown=0, NotChecked=0, Total=7832 [2020-11-07 02:10:18,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-11-07 02:10:18,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 277. [2020-11-07 02:10:18,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-11-07 02:10:18,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2020-11-07 02:10:18,457 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 267 [2020-11-07 02:10:18,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:10:18,458 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2020-11-07 02:10:18,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-07 02:10:18,458 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2020-11-07 02:10:18,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-11-07 02:10:18,459 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:10:18,460 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:10:18,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-07 02:10:18,460 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:10:18,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:10:18,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1378412177, now seen corresponding path program 15 times [2020-11-07 02:10:18,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:10:18,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025102547] [2020-11-07 02:10:18,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:10:18,663 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:10:18,665 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:10:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:21,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:10:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:10:21,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025102547] [2020-11-07 02:10:21,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:10:21,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2020-11-07 02:10:21,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085586444] [2020-11-07 02:10:21,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-11-07 02:10:21,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:10:21,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-11-07 02:10:21,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=3396, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 02:10:21,582 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand 60 states. [2020-11-07 02:10:34,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:10:34,146 INFO L93 Difference]: Finished difference Result 305 states and 308 transitions. [2020-11-07 02:10:34,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-11-07 02:10:34,147 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 269 [2020-11-07 02:10:34,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:10:34,149 INFO L225 Difference]: With dead ends: 305 [2020-11-07 02:10:34,150 INFO L226 Difference]: Without dead ends: 292 [2020-11-07 02:10:34,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3869 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=519, Invalid=13523, Unknown=0, NotChecked=0, Total=14042 [2020-11-07 02:10:34,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-11-07 02:10:34,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 289. [2020-11-07 02:10:34,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-11-07 02:10:34,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2020-11-07 02:10:34,252 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 269 [2020-11-07 02:10:34,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:10:34,252 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2020-11-07 02:10:34,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-11-07 02:10:34,252 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2020-11-07 02:10:34,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-11-07 02:10:34,253 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:10:34,254 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:10:34,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-07 02:10:34,254 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:10:34,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:10:34,254 INFO L82 PathProgramCache]: Analyzing trace with hash 2058995948, now seen corresponding path program 16 times [2020-11-07 02:10:34,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:10:34,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690945368] [2020-11-07 02:10:34,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:10:34,452 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:10:34,453 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:10:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:35,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:10:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:10:35,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690945368] [2020-11-07 02:10:35,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:10:35,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-11-07 02:10:35,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097650369] [2020-11-07 02:10:35,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-07 02:10:35,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:10:35,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-07 02:10:35,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 02:10:35,570 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand 34 states. [2020-11-07 02:10:40,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:10:40,647 INFO L93 Difference]: Finished difference Result 315 states and 317 transitions. [2020-11-07 02:10:40,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-07 02:10:40,648 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 285 [2020-11-07 02:10:40,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:10:40,650 INFO L225 Difference]: With dead ends: 315 [2020-11-07 02:10:40,650 INFO L226 Difference]: Without dead ends: 305 [2020-11-07 02:10:40,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2293 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3009, Invalid=5921, Unknown=0, NotChecked=0, Total=8930 [2020-11-07 02:10:40,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-11-07 02:10:40,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 295. [2020-11-07 02:10:40,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-11-07 02:10:40,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2020-11-07 02:10:40,734 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 285 [2020-11-07 02:10:40,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:10:40,735 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2020-11-07 02:10:40,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-07 02:10:40,735 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2020-11-07 02:10:40,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-11-07 02:10:40,736 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:10:40,736 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:10:40,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-07 02:10:40,737 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:10:40,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:10:40,737 INFO L82 PathProgramCache]: Analyzing trace with hash 661452847, now seen corresponding path program 16 times [2020-11-07 02:10:40,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:10:40,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852575722] [2020-11-07 02:10:40,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:10:40,935 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:10:40,937 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:10:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:44,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:10:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:10:44,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852575722] [2020-11-07 02:10:44,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:10:44,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2020-11-07 02:10:44,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032989976] [2020-11-07 02:10:44,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-11-07 02:10:44,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:10:44,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-11-07 02:10:44,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3878, Unknown=0, NotChecked=0, Total=4032 [2020-11-07 02:10:44,433 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand 64 states. [2020-11-07 02:10:59,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:10:59,238 INFO L93 Difference]: Finished difference Result 323 states and 326 transitions. [2020-11-07 02:10:59,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-11-07 02:10:59,240 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 287 [2020-11-07 02:10:59,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:10:59,243 INFO L225 Difference]: With dead ends: 323 [2020-11-07 02:10:59,243 INFO L226 Difference]: Without dead ends: 310 [2020-11-07 02:10:59,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4445 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=555, Invalid=15447, Unknown=0, NotChecked=0, Total=16002 [2020-11-07 02:10:59,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-11-07 02:10:59,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 307. [2020-11-07 02:10:59,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-11-07 02:10:59,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2020-11-07 02:10:59,396 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 287 [2020-11-07 02:10:59,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:10:59,396 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2020-11-07 02:10:59,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-11-07 02:10:59,396 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2020-11-07 02:10:59,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-11-07 02:10:59,398 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:10:59,399 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:10:59,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-07 02:10:59,399 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:10:59,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:10:59,400 INFO L82 PathProgramCache]: Analyzing trace with hash -130406484, now seen corresponding path program 17 times [2020-11-07 02:10:59,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:10:59,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053260744] [2020-11-07 02:10:59,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:10:59,623 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:10:59,624 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:10:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:00,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:00,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:11:00,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053260744] [2020-11-07 02:11:00,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:00,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-11-07 02:11:00,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892611373] [2020-11-07 02:11:00,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-07 02:11:00,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:00,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-07 02:11:00,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 02:11:00,922 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand 36 states. [2020-11-07 02:11:06,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:06,857 INFO L93 Difference]: Finished difference Result 333 states and 335 transitions. [2020-11-07 02:11:06,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-11-07 02:11:06,866 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 303 [2020-11-07 02:11:06,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:06,868 INFO L225 Difference]: With dead ends: 333 [2020-11-07 02:11:06,868 INFO L226 Difference]: Without dead ends: 323 [2020-11-07 02:11:06,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=3401, Invalid=6699, Unknown=0, NotChecked=0, Total=10100 [2020-11-07 02:11:06,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-11-07 02:11:06,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 313. [2020-11-07 02:11:06,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-11-07 02:11:06,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 314 transitions. [2020-11-07 02:11:06,990 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 314 transitions. Word has length 303 [2020-11-07 02:11:06,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:06,991 INFO L481 AbstractCegarLoop]: Abstraction has 313 states and 314 transitions. [2020-11-07 02:11:06,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-07 02:11:06,991 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 314 transitions. [2020-11-07 02:11:06,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-11-07 02:11:06,993 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:06,993 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:11:06,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-11-07 02:11:06,994 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:06,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:06,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1179690735, now seen corresponding path program 17 times [2020-11-07 02:11:06,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:06,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126954245] [2020-11-07 02:11:06,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:07,190 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:11:07,192 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:11,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:11:11,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126954245] [2020-11-07 02:11:11,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:11,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2020-11-07 02:11:11,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530580890] [2020-11-07 02:11:11,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-11-07 02:11:11,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:11,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-11-07 02:11:11,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=4392, Unknown=0, NotChecked=0, Total=4556 [2020-11-07 02:11:11,319 INFO L87 Difference]: Start difference. First operand 313 states and 314 transitions. Second operand 68 states. [2020-11-07 02:11:28,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:28,460 INFO L93 Difference]: Finished difference Result 341 states and 344 transitions. [2020-11-07 02:11:28,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-11-07 02:11:28,462 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 305 [2020-11-07 02:11:28,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:28,465 INFO L225 Difference]: With dead ends: 341 [2020-11-07 02:11:28,465 INFO L226 Difference]: Without dead ends: 328 [2020-11-07 02:11:28,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5061 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=591, Invalid=17499, Unknown=0, NotChecked=0, Total=18090 [2020-11-07 02:11:28,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-11-07 02:11:28,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 325. [2020-11-07 02:11:28,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-11-07 02:11:28,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 326 transitions. [2020-11-07 02:11:28,594 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 326 transitions. Word has length 305 [2020-11-07 02:11:28,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:28,595 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 326 transitions. [2020-11-07 02:11:28,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-11-07 02:11:28,595 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 326 transitions. [2020-11-07 02:11:28,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-11-07 02:11:28,598 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:28,598 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:11:28,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-11-07 02:11:28,598 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:28,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:28,599 INFO L82 PathProgramCache]: Analyzing trace with hash -446146964, now seen corresponding path program 18 times [2020-11-07 02:11:28,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:28,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676198216] [2020-11-07 02:11:28,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:28,829 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:11:28,830 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:30,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:11:30,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676198216] [2020-11-07 02:11:30,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:30,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-11-07 02:11:30,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961096411] [2020-11-07 02:11:30,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-07 02:11:30,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:30,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-07 02:11:30,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2020-11-07 02:11:30,446 INFO L87 Difference]: Start difference. First operand 325 states and 326 transitions. Second operand 38 states. [2020-11-07 02:11:37,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:37,226 INFO L93 Difference]: Finished difference Result 351 states and 353 transitions. [2020-11-07 02:11:37,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-11-07 02:11:37,227 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 321 [2020-11-07 02:11:37,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:37,230 INFO L225 Difference]: With dead ends: 351 [2020-11-07 02:11:37,230 INFO L226 Difference]: Without dead ends: 341 [2020-11-07 02:11:37,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2939 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=3817, Invalid=7525, Unknown=0, NotChecked=0, Total=11342 [2020-11-07 02:11:37,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-11-07 02:11:37,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 331. [2020-11-07 02:11:37,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-11-07 02:11:37,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 332 transitions. [2020-11-07 02:11:37,388 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 332 transitions. Word has length 321 [2020-11-07 02:11:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:37,389 INFO L481 AbstractCegarLoop]: Abstraction has 331 states and 332 transitions. [2020-11-07 02:11:37,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-07 02:11:37,389 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 332 transitions. [2020-11-07 02:11:37,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-11-07 02:11:37,391 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:37,392 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:11:37,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-11-07 02:11:37,392 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:37,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:37,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1599199825, now seen corresponding path program 18 times [2020-11-07 02:11:37,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:37,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882704830] [2020-11-07 02:11:37,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:37,622 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:11:37,623 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:42,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:42,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:11:42,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882704830] [2020-11-07 02:11:42,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:42,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2020-11-07 02:11:42,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009373546] [2020-11-07 02:11:42,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-11-07 02:11:42,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:42,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-11-07 02:11:42,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=4938, Unknown=0, NotChecked=0, Total=5112 [2020-11-07 02:11:42,374 INFO L87 Difference]: Start difference. First operand 331 states and 332 transitions. Second operand 72 states. [2020-11-07 02:12:02,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:12:02,008 INFO L93 Difference]: Finished difference Result 359 states and 362 transitions. [2020-11-07 02:12:02,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-11-07 02:12:02,010 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 323 [2020-11-07 02:12:02,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:12:02,013 INFO L225 Difference]: With dead ends: 359 [2020-11-07 02:12:02,013 INFO L226 Difference]: Without dead ends: 346 [2020-11-07 02:12:02,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5717 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=627, Invalid=19679, Unknown=0, NotChecked=0, Total=20306 [2020-11-07 02:12:02,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-11-07 02:12:02,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 343. [2020-11-07 02:12:02,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-11-07 02:12:02,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 344 transitions. [2020-11-07 02:12:02,169 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 344 transitions. Word has length 323 [2020-11-07 02:12:02,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:12:02,170 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 344 transitions. [2020-11-07 02:12:02,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-11-07 02:12:02,170 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 344 transitions. [2020-11-07 02:12:02,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-11-07 02:12:02,173 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:12:02,173 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:12:02,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-11-07 02:12:02,173 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:12:02,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:12:02,174 INFO L82 PathProgramCache]: Analyzing trace with hash 7361836, now seen corresponding path program 19 times [2020-11-07 02:12:02,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:12:02,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899212938] [2020-11-07 02:12:02,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:12:02,414 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:12:02,416 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:12:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:04,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:12:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:04,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:12:04,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899212938] [2020-11-07 02:12:04,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:12:04,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-11-07 02:12:04,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451195446] [2020-11-07 02:12:04,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-07 02:12:04,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:12:04,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-07 02:12:04,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 02:12:04,326 INFO L87 Difference]: Start difference. First operand 343 states and 344 transitions. Second operand 40 states. [2020-11-07 02:12:11,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:12:11,833 INFO L93 Difference]: Finished difference Result 369 states and 371 transitions. [2020-11-07 02:12:11,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-07 02:12:11,834 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 339 [2020-11-07 02:12:11,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:12:11,836 INFO L225 Difference]: With dead ends: 369 [2020-11-07 02:12:11,837 INFO L226 Difference]: Without dead ends: 359 [2020-11-07 02:12:11,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3292 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=4257, Invalid=8399, Unknown=0, NotChecked=0, Total=12656 [2020-11-07 02:12:11,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-11-07 02:12:11,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 349. [2020-11-07 02:12:11,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-11-07 02:12:11,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 350 transitions. [2020-11-07 02:12:11,970 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 350 transitions. Word has length 339 [2020-11-07 02:12:11,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:12:11,971 INFO L481 AbstractCegarLoop]: Abstraction has 349 states and 350 transitions. [2020-11-07 02:12:11,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-07 02:12:11,971 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 350 transitions. [2020-11-07 02:12:11,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-11-07 02:12:11,974 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:12:11,974 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:12:11,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-11-07 02:12:11,975 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:12:11,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:12:11,975 INFO L82 PathProgramCache]: Analyzing trace with hash 431060079, now seen corresponding path program 19 times [2020-11-07 02:12:11,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:12:11,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185133024] [2020-11-07 02:12:11,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:12:12,090 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-11-07 02:12:12,240 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:12:12,241 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:12:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:17,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:12:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:12:17,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185133024] [2020-11-07 02:12:17,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:12:17,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2020-11-07 02:12:17,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952961384] [2020-11-07 02:12:17,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-11-07 02:12:17,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:12:17,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-11-07 02:12:17,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=5516, Unknown=0, NotChecked=0, Total=5700 [2020-11-07 02:12:17,686 INFO L87 Difference]: Start difference. First operand 349 states and 350 transitions. Second operand 76 states. [2020-11-07 02:12:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:12:39,875 INFO L93 Difference]: Finished difference Result 377 states and 380 transitions. [2020-11-07 02:12:39,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-11-07 02:12:39,876 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 341 [2020-11-07 02:12:39,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:12:39,879 INFO L225 Difference]: With dead ends: 377 [2020-11-07 02:12:39,880 INFO L226 Difference]: Without dead ends: 364 [2020-11-07 02:12:39,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6413 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=663, Invalid=21987, Unknown=0, NotChecked=0, Total=22650 [2020-11-07 02:12:39,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-11-07 02:12:40,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 361. [2020-11-07 02:12:40,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-11-07 02:12:40,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 362 transitions. [2020-11-07 02:12:40,044 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 362 transitions. Word has length 341 [2020-11-07 02:12:40,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:12:40,044 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 362 transitions. [2020-11-07 02:12:40,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-11-07 02:12:40,045 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 362 transitions. [2020-11-07 02:12:40,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-11-07 02:12:40,047 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:12:40,048 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:12:40,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-11-07 02:12:40,048 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:12:40,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:12:40,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1417552876, now seen corresponding path program 20 times [2020-11-07 02:12:40,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:12:40,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080554896] [2020-11-07 02:12:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:12:40,169 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-11-07 02:12:40,318 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:12:40,319 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:12:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:42,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:12:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:12:42,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080554896] [2020-11-07 02:12:42,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:12:42,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-11-07 02:12:42,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655447520] [2020-11-07 02:12:42,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-07 02:12:42,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:12:42,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-07 02:12:42,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=938, Unknown=0, NotChecked=0, Total=1722 [2020-11-07 02:12:42,453 INFO L87 Difference]: Start difference. First operand 361 states and 362 transitions. Second operand 42 states. [2020-11-07 02:12:51,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:12:51,118 INFO L93 Difference]: Finished difference Result 387 states and 389 transitions. [2020-11-07 02:12:51,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-11-07 02:12:51,119 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 357 [2020-11-07 02:12:51,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:12:51,121 INFO L225 Difference]: With dead ends: 387 [2020-11-07 02:12:51,121 INFO L226 Difference]: Without dead ends: 377 [2020-11-07 02:12:51,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3665 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=4721, Invalid=9321, Unknown=0, NotChecked=0, Total=14042 [2020-11-07 02:12:51,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-11-07 02:12:51,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 367. [2020-11-07 02:12:51,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-11-07 02:12:51,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 368 transitions. [2020-11-07 02:12:51,348 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 368 transitions. Word has length 357 [2020-11-07 02:12:51,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:12:51,348 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 368 transitions. [2020-11-07 02:12:51,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-07 02:12:51,349 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 368 transitions. [2020-11-07 02:12:51,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-11-07 02:12:51,351 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:12:51,352 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:12:51,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-11-07 02:12:51,352 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:12:51,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:12:51,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1585016017, now seen corresponding path program 20 times [2020-11-07 02:12:51,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:12:51,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149796841] [2020-11-07 02:12:51,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:12:51,458 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-11-07 02:12:51,605 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:12:51,606 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:12:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:57,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:12:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:12:57,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149796841] [2020-11-07 02:12:57,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:12:57,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2020-11-07 02:12:57,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70880569] [2020-11-07 02:12:57,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-11-07 02:12:57,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:12:57,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-11-07 02:12:57,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=6126, Unknown=0, NotChecked=0, Total=6320 [2020-11-07 02:12:57,989 INFO L87 Difference]: Start difference. First operand 367 states and 368 transitions. Second operand 80 states. [2020-11-07 02:13:23,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:13:23,788 INFO L93 Difference]: Finished difference Result 395 states and 398 transitions. [2020-11-07 02:13:23,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-11-07 02:13:23,789 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 359 [2020-11-07 02:13:23,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:13:23,792 INFO L225 Difference]: With dead ends: 395 [2020-11-07 02:13:23,792 INFO L226 Difference]: Without dead ends: 382 [2020-11-07 02:13:23,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7149 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=699, Invalid=24423, Unknown=0, NotChecked=0, Total=25122 [2020-11-07 02:13:23,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-11-07 02:13:23,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 379. [2020-11-07 02:13:23,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-11-07 02:13:23,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 380 transitions. [2020-11-07 02:13:23,943 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 380 transitions. Word has length 359 [2020-11-07 02:13:23,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:13:23,944 INFO L481 AbstractCegarLoop]: Abstraction has 379 states and 380 transitions. [2020-11-07 02:13:23,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-11-07 02:13:23,944 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 380 transitions. [2020-11-07 02:13:23,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2020-11-07 02:13:23,947 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:13:23,947 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:13:23,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-11-07 02:13:23,947 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:13:23,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:13:23,948 INFO L82 PathProgramCache]: Analyzing trace with hash -105004372, now seen corresponding path program 21 times [2020-11-07 02:13:23,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:13:23,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104354971] [2020-11-07 02:13:23,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:13:24,198 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:13:24,200 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:13:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:26,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:13:26,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:13:26,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104354971] [2020-11-07 02:13:26,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:13:26,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-11-07 02:13:26,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363237933] [2020-11-07 02:13:26,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-07 02:13:26,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:13:26,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-07 02:13:26,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1027, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 02:13:26,755 INFO L87 Difference]: Start difference. First operand 379 states and 380 transitions. Second operand 44 states. [2020-11-07 02:13:36,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:13:36,535 INFO L93 Difference]: Finished difference Result 405 states and 407 transitions. [2020-11-07 02:13:36,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-11-07 02:13:36,537 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 375 [2020-11-07 02:13:36,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:13:36,540 INFO L225 Difference]: With dead ends: 405 [2020-11-07 02:13:36,540 INFO L226 Difference]: Without dead ends: 395 [2020-11-07 02:13:36,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4058 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=5209, Invalid=10291, Unknown=0, NotChecked=0, Total=15500 [2020-11-07 02:13:36,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-11-07 02:13:36,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 385. [2020-11-07 02:13:36,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-11-07 02:13:36,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 386 transitions. [2020-11-07 02:13:36,745 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 386 transitions. Word has length 375 [2020-11-07 02:13:36,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:13:36,745 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 386 transitions. [2020-11-07 02:13:36,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-07 02:13:36,745 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 386 transitions. [2020-11-07 02:13:36,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-11-07 02:13:36,748 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:13:36,749 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:13:36,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-11-07 02:13:36,749 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:13:36,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:13:36,750 INFO L82 PathProgramCache]: Analyzing trace with hash -178683409, now seen corresponding path program 21 times [2020-11-07 02:13:36,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:13:36,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619703343] [2020-11-07 02:13:36,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:13:37,004 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:13:37,005 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:13:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:44,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:13:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:13:44,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619703343] [2020-11-07 02:13:44,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:13:44,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2020-11-07 02:13:44,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542330338] [2020-11-07 02:13:44,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-11-07 02:13:44,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:13:44,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-11-07 02:13:44,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=6768, Unknown=0, NotChecked=0, Total=6972 [2020-11-07 02:13:44,508 INFO L87 Difference]: Start difference. First operand 385 states and 386 transitions. Second operand 84 states. [2020-11-07 02:14:13,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:14:13,658 INFO L93 Difference]: Finished difference Result 413 states and 416 transitions. [2020-11-07 02:14:13,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-11-07 02:14:13,660 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 377 [2020-11-07 02:14:13,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:14:13,663 INFO L225 Difference]: With dead ends: 413 [2020-11-07 02:14:13,663 INFO L226 Difference]: Without dead ends: 400 [2020-11-07 02:14:13,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7925 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=735, Invalid=26987, Unknown=0, NotChecked=0, Total=27722 [2020-11-07 02:14:13,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-11-07 02:14:13,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 397. [2020-11-07 02:14:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-11-07 02:14:13,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 398 transitions. [2020-11-07 02:14:13,833 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 398 transitions. Word has length 377 [2020-11-07 02:14:13,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:14:13,834 INFO L481 AbstractCegarLoop]: Abstraction has 397 states and 398 transitions. [2020-11-07 02:14:13,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-11-07 02:14:13,834 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 398 transitions. [2020-11-07 02:14:13,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-11-07 02:14:13,837 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:14:13,837 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:14:13,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-11-07 02:14:13,838 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:14:13,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:14:13,838 INFO L82 PathProgramCache]: Analyzing trace with hash -715443860, now seen corresponding path program 22 times [2020-11-07 02:14:13,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:14:13,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096508849] [2020-11-07 02:14:13,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:13,979 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-11-07 02:14:14,133 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-11-07 02:14:14,165 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:14:14,166 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:14:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:16,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:14:16,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:14:16,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096508849] [2020-11-07 02:14:16,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:14:16,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2020-11-07 02:14:16,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974780319] [2020-11-07 02:14:16,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-11-07 02:14:16,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:14:16,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-11-07 02:14:16,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=1120, Unknown=0, NotChecked=0, Total=2070 [2020-11-07 02:14:16,934 INFO L87 Difference]: Start difference. First operand 397 states and 398 transitions. Second operand 46 states. [2020-11-07 02:14:26,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:14:26,698 INFO L93 Difference]: Finished difference Result 423 states and 425 transitions. [2020-11-07 02:14:26,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-11-07 02:14:26,700 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 393 [2020-11-07 02:14:26,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:14:26,703 INFO L225 Difference]: With dead ends: 423 [2020-11-07 02:14:26,703 INFO L226 Difference]: Without dead ends: 413 [2020-11-07 02:14:26,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4471 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=5721, Invalid=11309, Unknown=0, NotChecked=0, Total=17030 [2020-11-07 02:14:26,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-11-07 02:14:26,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 403. [2020-11-07 02:14:26,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-11-07 02:14:26,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 404 transitions. [2020-11-07 02:14:26,859 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 404 transitions. Word has length 393 [2020-11-07 02:14:26,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:14:26,859 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 404 transitions. [2020-11-07 02:14:26,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-11-07 02:14:26,859 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 404 transitions. [2020-11-07 02:14:26,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-11-07 02:14:26,861 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:14:26,861 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:14:26,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-11-07 02:14:26,861 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:14:26,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:14:26,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1599488175, now seen corresponding path program 22 times [2020-11-07 02:14:26,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:14:26,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037272958] [2020-11-07 02:14:26,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:27,104 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:14:27,105 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:14:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:34,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:14:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:14:34,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037272958] [2020-11-07 02:14:34,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:14:34,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2020-11-07 02:14:34,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467368403] [2020-11-07 02:14:34,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-11-07 02:14:34,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:14:34,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-11-07 02:14:34,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=7442, Unknown=0, NotChecked=0, Total=7656 [2020-11-07 02:14:34,352 INFO L87 Difference]: Start difference. First operand 403 states and 404 transitions. Second operand 88 states. [2020-11-07 02:15:01,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:15:01,985 INFO L93 Difference]: Finished difference Result 431 states and 434 transitions. [2020-11-07 02:15:01,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-11-07 02:15:01,986 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 395 [2020-11-07 02:15:01,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:15:01,989 INFO L225 Difference]: With dead ends: 431 [2020-11-07 02:15:01,990 INFO L226 Difference]: Without dead ends: 418 [2020-11-07 02:15:01,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8741 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=771, Invalid=29679, Unknown=0, NotChecked=0, Total=30450 [2020-11-07 02:15:01,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-11-07 02:15:02,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 415. [2020-11-07 02:15:02,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2020-11-07 02:15:02,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 416 transitions. [2020-11-07 02:15:02,208 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 416 transitions. Word has length 395 [2020-11-07 02:15:02,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:15:02,208 INFO L481 AbstractCegarLoop]: Abstraction has 415 states and 416 transitions. [2020-11-07 02:15:02,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-11-07 02:15:02,209 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 416 transitions. [2020-11-07 02:15:02,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-11-07 02:15:02,211 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:15:02,211 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:15:02,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-11-07 02:15:02,212 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:15:02,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:15:02,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1501720620, now seen corresponding path program 23 times [2020-11-07 02:15:02,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:15:02,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156972904] [2020-11-07 02:15:02,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:15:02,319 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-11-07 02:15:02,477 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:15:02,479 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:15:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:04,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:15:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:15:05,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156972904] [2020-11-07 02:15:05,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:15:05,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2020-11-07 02:15:05,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681991479] [2020-11-07 02:15:05,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-11-07 02:15:05,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:15:05,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-11-07 02:15:05,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=1217, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 02:15:05,088 INFO L87 Difference]: Start difference. First operand 415 states and 416 transitions. Second operand 48 states. [2020-11-07 02:15:15,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:15:15,782 INFO L93 Difference]: Finished difference Result 441 states and 443 transitions. [2020-11-07 02:15:15,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-11-07 02:15:15,784 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 411 [2020-11-07 02:15:15,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:15:15,787 INFO L225 Difference]: With dead ends: 441 [2020-11-07 02:15:15,787 INFO L226 Difference]: Without dead ends: 431 [2020-11-07 02:15:15,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4904 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=6257, Invalid=12375, Unknown=0, NotChecked=0, Total=18632 [2020-11-07 02:15:15,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-11-07 02:15:15,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 421. [2020-11-07 02:15:15,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-11-07 02:15:15,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 422 transitions. [2020-11-07 02:15:15,980 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 422 transitions. Word has length 411 [2020-11-07 02:15:15,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:15:15,980 INFO L481 AbstractCegarLoop]: Abstraction has 421 states and 422 transitions. [2020-11-07 02:15:15,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-11-07 02:15:15,980 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 422 transitions. [2020-11-07 02:15:15,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-11-07 02:15:15,983 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:15:15,983 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:15:15,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-11-07 02:15:15,984 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:15:15,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:15:15,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1990774639, now seen corresponding path program 23 times [2020-11-07 02:15:15,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:15:15,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043021193] [2020-11-07 02:15:15,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:15:16,103 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-11-07 02:15:16,255 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:15:16,256 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:15:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:24,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:15:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:15:24,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043021193] [2020-11-07 02:15:24,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:15:24,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2020-11-07 02:15:24,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205216097] [2020-11-07 02:15:24,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-11-07 02:15:24,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:15:24,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-11-07 02:15:24,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=8148, Unknown=0, NotChecked=0, Total=8372 [2020-11-07 02:15:24,513 INFO L87 Difference]: Start difference. First operand 421 states and 422 transitions. Second operand 92 states. [2020-11-07 02:15:54,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:15:54,232 INFO L93 Difference]: Finished difference Result 449 states and 452 transitions. [2020-11-07 02:15:54,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-11-07 02:15:54,234 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 413 [2020-11-07 02:15:54,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:15:54,237 INFO L225 Difference]: With dead ends: 449 [2020-11-07 02:15:54,237 INFO L226 Difference]: Without dead ends: 436 [2020-11-07 02:15:54,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9597 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=807, Invalid=32499, Unknown=0, NotChecked=0, Total=33306 [2020-11-07 02:15:54,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-11-07 02:15:54,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 433. [2020-11-07 02:15:54,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-11-07 02:15:54,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 434 transitions. [2020-11-07 02:15:54,440 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 434 transitions. Word has length 413 [2020-11-07 02:15:54,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:15:54,441 INFO L481 AbstractCegarLoop]: Abstraction has 433 states and 434 transitions. [2020-11-07 02:15:54,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-11-07 02:15:54,441 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 434 transitions. [2020-11-07 02:15:54,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2020-11-07 02:15:54,443 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:15:54,443 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:15:54,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-11-07 02:15:54,443 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:15:54,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:15:54,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1163886316, now seen corresponding path program 24 times [2020-11-07 02:15:54,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:15:54,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466336815] [2020-11-07 02:15:54,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:15:54,552 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-11-07 02:15:54,715 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:15:54,716 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:15:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:57,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:15:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:15:57,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466336815] [2020-11-07 02:15:57,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:15:57,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2020-11-07 02:15:57,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488264262] [2020-11-07 02:15:57,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-11-07 02:15:57,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:15:57,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-11-07 02:15:57,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=1318, Unknown=0, NotChecked=0, Total=2450 [2020-11-07 02:15:57,698 INFO L87 Difference]: Start difference. First operand 433 states and 434 transitions. Second operand 50 states. [2020-11-07 02:16:08,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:16:08,492 INFO L93 Difference]: Finished difference Result 459 states and 461 transitions. [2020-11-07 02:16:08,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-11-07 02:16:08,494 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 429 [2020-11-07 02:16:08,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:16:08,496 INFO L225 Difference]: With dead ends: 459 [2020-11-07 02:16:08,496 INFO L226 Difference]: Without dead ends: 449 [2020-11-07 02:16:08,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5357 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=6817, Invalid=13489, Unknown=0, NotChecked=0, Total=20306 [2020-11-07 02:16:08,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-11-07 02:16:08,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 439. [2020-11-07 02:16:08,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-11-07 02:16:08,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 440 transitions. [2020-11-07 02:16:08,697 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 440 transitions. Word has length 429 [2020-11-07 02:16:08,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:16:08,697 INFO L481 AbstractCegarLoop]: Abstraction has 439 states and 440 transitions. [2020-11-07 02:16:08,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-11-07 02:16:08,697 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 440 transitions. [2020-11-07 02:16:08,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2020-11-07 02:16:08,700 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:16:08,700 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:16:08,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-11-07 02:16:08,700 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:16:08,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:16:08,701 INFO L82 PathProgramCache]: Analyzing trace with hash -545444305, now seen corresponding path program 24 times [2020-11-07 02:16:08,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:16:08,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72266427] [2020-11-07 02:16:08,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:16:08,810 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-11-07 02:16:08,948 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:16:08,950 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:16:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:16:16,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:16:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:16:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:16:17,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72266427] [2020-11-07 02:16:17,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:16:17,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2020-11-07 02:16:17,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670742082] [2020-11-07 02:16:17,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-11-07 02:16:17,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:16:17,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-11-07 02:16:17,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=8886, Unknown=0, NotChecked=0, Total=9120 [2020-11-07 02:16:17,288 INFO L87 Difference]: Start difference. First operand 439 states and 440 transitions. Second operand 96 states. [2020-11-07 02:16:49,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:16:49,357 INFO L93 Difference]: Finished difference Result 467 states and 470 transitions. [2020-11-07 02:16:49,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-11-07 02:16:49,359 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 431 [2020-11-07 02:16:49,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:16:49,363 INFO L225 Difference]: With dead ends: 467 [2020-11-07 02:16:49,363 INFO L226 Difference]: Without dead ends: 454 [2020-11-07 02:16:49,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10493 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=843, Invalid=35447, Unknown=0, NotChecked=0, Total=36290 [2020-11-07 02:16:49,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-11-07 02:16:49,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 451. [2020-11-07 02:16:49,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-11-07 02:16:49,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 452 transitions. [2020-11-07 02:16:49,564 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 452 transitions. Word has length 431 [2020-11-07 02:16:49,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:16:49,565 INFO L481 AbstractCegarLoop]: Abstraction has 451 states and 452 transitions. [2020-11-07 02:16:49,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-11-07 02:16:49,565 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 452 transitions. [2020-11-07 02:16:49,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-11-07 02:16:49,567 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:16:49,568 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:16:49,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-11-07 02:16:49,568 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:16:49,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:16:49,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1696488876, now seen corresponding path program 25 times [2020-11-07 02:16:49,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:16:49,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693071985] [2020-11-07 02:16:49,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:16:49,683 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-11-07 02:16:49,835 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-11-07 02:16:49,871 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:16:49,872 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:16:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:17:00,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:17:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:17:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:17:00,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693071985] [2020-11-07 02:17:00,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:17:00,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2020-11-07 02:17:00,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642140276] [2020-11-07 02:17:00,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-11-07 02:17:00,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:17:00,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-11-07 02:17:00,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=9957, Unknown=0, NotChecked=0, Total=10302 [2020-11-07 02:17:00,965 INFO L87 Difference]: Start difference. First operand 451 states and 452 transitions. Second operand 102 states. [2020-11-07 02:17:01,929 WARN L194 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 34 [2020-11-07 02:17:02,316 WARN L194 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 39 [2020-11-07 02:17:03,010 WARN L194 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 157 [2020-11-07 02:17:03,893 WARN L194 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 160 [2020-11-07 02:17:04,847 WARN L194 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 165 [2020-11-07 02:17:05,864 WARN L194 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 156 [2020-11-07 02:17:06,650 WARN L194 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 159 [2020-11-07 02:17:07,451 WARN L194 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 164 [2020-11-07 02:17:08,171 WARN L194 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 154 [2020-11-07 02:17:08,970 WARN L194 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 160 [2020-11-07 02:17:09,850 WARN L194 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 165 [2020-11-07 02:17:10,532 WARN L194 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 155 [2020-11-07 02:17:11,350 WARN L194 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 155 [2020-11-07 02:17:12,164 WARN L194 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 160 [2020-11-07 02:17:12,858 WARN L194 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 149 [2020-11-07 02:17:13,726 WARN L194 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 156 [2020-11-07 02:17:14,616 WARN L194 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 161 [2020-11-07 02:17:15,360 WARN L194 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 150 [2020-11-07 02:17:16,178 WARN L194 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 151 [2020-11-07 02:17:17,028 WARN L194 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 156 [2020-11-07 02:17:17,682 WARN L194 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 137 [2020-11-07 02:17:18,470 WARN L194 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 141 [2020-11-07 02:17:19,352 WARN L194 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 151 [2020-11-07 02:17:20,078 WARN L194 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 136 [2020-11-07 02:17:20,928 WARN L194 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 141 [2020-11-07 02:17:21,737 WARN L194 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 146 [2020-11-07 02:17:22,393 WARN L194 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 132 [2020-11-07 02:17:23,222 WARN L194 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 137 [2020-11-07 02:17:24,028 WARN L194 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 142 [2020-11-07 02:17:24,722 WARN L194 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 132 [2020-11-07 02:17:25,625 WARN L194 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 137 [2020-11-07 02:17:26,496 WARN L194 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 142 [2020-11-07 02:17:27,167 WARN L194 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 127 [2020-11-07 02:17:27,971 WARN L194 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 132 [2020-11-07 02:17:28,797 WARN L194 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 137 [2020-11-07 02:17:29,470 WARN L194 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 127 [2020-11-07 02:17:30,309 WARN L194 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 127 [2020-11-07 02:17:31,111 WARN L194 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 132 [2020-11-07 02:17:31,785 WARN L194 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 122 [2020-11-07 02:17:32,611 WARN L194 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 127 [2020-11-07 02:17:33,403 WARN L194 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 132 [2020-11-07 02:17:34,107 WARN L194 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 122 [2020-11-07 02:17:34,932 WARN L194 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 122 [2020-11-07 02:17:35,792 WARN L194 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 127 [2020-11-07 02:17:36,535 WARN L194 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 117 [2020-11-07 02:17:37,452 WARN L194 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 117 [2020-11-07 02:17:38,259 WARN L194 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 122 [2020-11-07 02:17:38,944 WARN L194 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 117 [2020-11-07 02:17:39,789 WARN L194 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 117 [2020-11-07 02:17:40,590 WARN L194 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 122 [2020-11-07 02:17:41,264 WARN L194 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 112 [2020-11-07 02:17:42,102 WARN L194 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 112 [2020-11-07 02:17:42,911 WARN L194 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 117 [2020-11-07 02:17:43,613 WARN L194 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 112 [2020-11-07 02:17:44,457 WARN L194 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 112 [2020-11-07 02:17:45,255 WARN L194 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 117 [2020-11-07 02:17:45,943 WARN L194 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 107 [2020-11-07 02:17:46,779 WARN L194 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 107 [2020-11-07 02:17:47,584 WARN L194 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 112 [2020-11-07 02:17:48,285 WARN L194 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 107 [2020-11-07 02:17:49,168 WARN L194 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 102 [2020-11-07 02:17:49,994 WARN L194 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 107 [2020-11-07 02:17:50,694 WARN L194 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 102 [2020-11-07 02:17:51,639 WARN L194 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 102 [2020-11-07 02:17:52,485 WARN L194 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 107 [2020-11-07 02:17:53,158 WARN L194 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 102 [2020-11-07 02:17:54,013 WARN L194 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 97 [2020-11-07 02:17:54,798 WARN L194 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 102 [2020-11-07 02:17:55,486 WARN L194 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 97 [2020-11-07 02:17:56,382 WARN L194 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 97 [2020-11-07 02:17:57,167 WARN L194 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 102 [2020-11-07 02:17:57,833 WARN L194 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 97 [2020-11-07 02:17:58,690 WARN L194 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 92 [2020-11-07 02:17:59,486 WARN L194 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 97 [2020-11-07 02:18:00,187 WARN L194 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 92 [2020-11-07 02:18:01,072 WARN L194 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 87 [2020-11-07 02:18:01,870 WARN L194 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 92 [2020-11-07 02:18:02,537 WARN L194 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 92 [2020-11-07 02:18:03,440 WARN L194 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 87 [2020-11-07 02:18:04,217 WARN L194 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 92 [2020-11-07 02:18:04,931 WARN L194 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 87 [2020-11-07 02:18:05,812 WARN L194 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 82 [2020-11-07 02:18:06,640 WARN L194 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 87 [2020-11-07 02:18:07,317 WARN L194 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 82 [2020-11-07 02:18:08,236 WARN L194 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 82 [2020-11-07 02:18:08,980 WARN L194 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 87 [2020-11-07 02:18:09,673 WARN L194 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 82 [2020-11-07 02:18:10,577 WARN L194 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 77 [2020-11-07 02:18:11,430 WARN L194 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 82 [2020-11-07 02:18:12,136 WARN L194 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 77 [2020-11-07 02:18:13,044 WARN L194 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 77 [2020-11-07 02:18:13,839 WARN L194 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 82 [2020-11-07 02:18:14,551 WARN L194 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 77 [2020-11-07 02:18:15,477 WARN L194 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 77 [2020-11-07 02:18:16,313 WARN L194 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 77 [2020-11-07 02:18:16,993 WARN L194 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2020-11-07 02:18:17,878 WARN L194 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2020-11-07 02:18:18,714 WARN L194 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 77 [2020-11-07 02:18:19,392 WARN L194 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 72 [2020-11-07 02:18:20,257 WARN L194 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 72 [2020-11-07 02:18:21,050 WARN L194 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 77 [2020-11-07 02:18:21,711 WARN L194 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2020-11-07 02:18:22,553 WARN L194 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2020-11-07 02:18:23,349 WARN L194 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 72 [2020-11-07 02:18:24,015 WARN L194 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-11-07 02:18:24,815 WARN L194 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-11-07 02:18:25,595 WARN L194 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 72 [2020-11-07 02:18:26,223 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-11-07 02:18:27,013 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-11-07 02:18:27,780 WARN L194 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-11-07 02:18:28,374 WARN L194 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-11-07 02:18:29,133 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2020-11-07 02:18:29,853 WARN L194 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-11-07 02:18:30,468 WARN L194 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-11-07 02:18:31,207 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-11-07 02:18:31,927 WARN L194 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-11-07 02:18:32,498 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-11-07 02:18:33,192 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-11-07 02:18:33,831 WARN L194 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-11-07 02:18:34,373 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-11-07 02:18:35,066 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-11-07 02:18:35,717 WARN L194 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-11-07 02:18:36,238 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-11-07 02:18:36,859 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-11-07 02:18:37,482 WARN L194 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-11-07 02:18:38,025 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-11-07 02:18:38,678 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-11-07 02:18:39,259 WARN L194 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-11-07 02:18:39,702 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-11-07 02:18:40,205 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-11-07 02:18:40,791 WARN L194 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-11-07 02:18:41,259 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-11-07 02:18:41,781 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-11-07 02:18:42,348 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-11-07 02:18:45,373 WARN L194 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 35 [2020-11-07 02:18:47,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:18:47,554 INFO L93 Difference]: Finished difference Result 476 states and 478 transitions. [2020-11-07 02:18:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2020-11-07 02:18:47,557 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 447 [2020-11-07 02:18:47,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:18:47,560 INFO L225 Difference]: With dead ends: 476 [2020-11-07 02:18:47,561 INFO L226 Difference]: Without dead ends: 466 [2020-11-07 02:18:47,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14912 ImplicationChecksByTransitivity, 110.7s TimeCoverageRelationStatistics Valid=11505, Invalid=50247, Unknown=0, NotChecked=0, Total=61752 [2020-11-07 02:18:47,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-11-07 02:18:47,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 457. [2020-11-07 02:18:47,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2020-11-07 02:18:47,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 458 transitions. [2020-11-07 02:18:47,803 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 458 transitions. Word has length 447 [2020-11-07 02:18:47,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:18:47,803 INFO L481 AbstractCegarLoop]: Abstraction has 457 states and 458 transitions. [2020-11-07 02:18:47,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-11-07 02:18:47,803 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 458 transitions. [2020-11-07 02:18:47,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-11-07 02:18:47,805 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:18:47,805 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:18:47,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-11-07 02:18:47,805 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:18:47,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:18:47,806 INFO L82 PathProgramCache]: Analyzing trace with hash 184507631, now seen corresponding path program 25 times [2020-11-07 02:18:47,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:18:47,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295208729] [2020-11-07 02:18:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:18:47,965 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-11-07 02:18:48,169 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-11-07 02:18:48,215 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:18:48,216 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:18:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:19:01,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:19:01,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:19:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:19:01,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295208729] [2020-11-07 02:19:01,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:19:01,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2020-11-07 02:19:01,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055063934] [2020-11-07 02:19:01,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-11-07 02:19:01,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:19:01,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-11-07 02:19:01,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=9656, Unknown=0, NotChecked=0, Total=9900 [2020-11-07 02:19:01,659 INFO L87 Difference]: Start difference. First operand 457 states and 458 transitions. Second operand 100 states. [2020-11-07 02:19:59,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:19:59,733 INFO L93 Difference]: Finished difference Result 485 states and 488 transitions. [2020-11-07 02:19:59,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-11-07 02:19:59,737 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 449 [2020-11-07 02:19:59,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:19:59,740 INFO L225 Difference]: With dead ends: 485 [2020-11-07 02:19:59,740 INFO L226 Difference]: Without dead ends: 472 [2020-11-07 02:19:59,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11429 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=879, Invalid=38523, Unknown=0, NotChecked=0, Total=39402 [2020-11-07 02:19:59,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-11-07 02:20:00,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 469. [2020-11-07 02:20:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-11-07 02:20:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 470 transitions. [2020-11-07 02:20:00,009 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 470 transitions. Word has length 449 [2020-11-07 02:20:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:20:00,010 INFO L481 AbstractCegarLoop]: Abstraction has 469 states and 470 transitions. [2020-11-07 02:20:00,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-11-07 02:20:00,010 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 470 transitions. [2020-11-07 02:20:00,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-11-07 02:20:00,011 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:20:00,012 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:20:00,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-11-07 02:20:00,012 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:20:00,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:20:00,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1374358636, now seen corresponding path program 26 times [2020-11-07 02:20:00,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:20:00,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23590447] [2020-11-07 02:20:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:20:00,193 WARN L194 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-11-07 02:20:00,426 WARN L194 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-11-07 02:20:00,478 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:20:00,480 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:20:00,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:20:15,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:20:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:20:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:20:16,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23590447] [2020-11-07 02:20:16,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:20:16,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2020-11-07 02:20:16,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983768953] [2020-11-07 02:20:16,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-11-07 02:20:16,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:20:16,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-11-07 02:20:16,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=10771, Unknown=0, NotChecked=0, Total=11130 [2020-11-07 02:20:16,076 INFO L87 Difference]: Start difference. First operand 469 states and 470 transitions. Second operand 106 states. [2020-11-07 02:20:16,853 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-11-07 02:20:17,464 WARN L194 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 34 [2020-11-07 02:20:17,989 WARN L194 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 39 [2020-11-07 02:20:18,847 WARN L194 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 162 [2020-11-07 02:20:19,897 WARN L194 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 165 [2020-11-07 02:20:21,148 WARN L194 SmtUtils]: Spent 833.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 170 [2020-11-07 02:20:22,656 WARN L194 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 161 [2020-11-07 02:20:23,651 WARN L194 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 164 [2020-11-07 02:20:24,825 WARN L194 SmtUtils]: Spent 837.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 169 [2020-11-07 02:20:25,734 WARN L194 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 159 [2020-11-07 02:20:26,797 WARN L194 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 165 [2020-11-07 02:20:27,994 WARN L194 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 170 [2020-11-07 02:20:28,941 WARN L194 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 160 [2020-11-07 02:20:30,068 WARN L194 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 160 [2020-11-07 02:20:31,282 WARN L194 SmtUtils]: Spent 819.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 165 [2020-11-07 02:20:32,240 WARN L194 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 154 [2020-11-07 02:20:33,408 WARN L194 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 161 [2020-11-07 02:20:34,662 WARN L194 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 166 [2020-11-07 02:20:35,595 WARN L194 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 155 [2020-11-07 02:20:36,737 WARN L194 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 156 [2020-11-07 02:20:37,946 WARN L194 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 161 [2020-11-07 02:20:38,903 WARN L194 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 150 [2020-11-07 02:20:40,083 WARN L194 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 151 [2020-11-07 02:20:41,326 WARN L194 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 156 [2020-11-07 02:20:42,322 WARN L194 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 145 [2020-11-07 02:20:43,510 WARN L194 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 151 [2020-11-07 02:20:44,757 WARN L194 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 156 [2020-11-07 02:20:45,717 WARN L194 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 137 [2020-11-07 02:20:46,956 WARN L194 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 142 [2020-11-07 02:20:48,195 WARN L194 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 152 [2020-11-07 02:20:49,199 WARN L194 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 137 [2020-11-07 02:20:50,530 WARN L194 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 142 [2020-11-07 02:20:51,809 WARN L194 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 147 [2020-11-07 02:20:52,857 WARN L194 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 132 [2020-11-07 02:20:54,148 WARN L194 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 137 [2020-11-07 02:20:55,441 WARN L194 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 142 [2020-11-07 02:20:56,494 WARN L194 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 132 [2020-11-07 02:20:57,842 WARN L194 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 132 [2020-11-07 02:20:59,167 WARN L194 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 137 [2020-11-07 02:21:00,210 WARN L194 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 127 [2020-11-07 02:21:01,558 WARN L194 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 132 [2020-11-07 02:21:02,858 WARN L194 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 137 [2020-11-07 02:21:03,928 WARN L194 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 127 [2020-11-07 02:21:05,288 WARN L194 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 127 [2020-11-07 02:21:06,590 WARN L194 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 132 [2020-11-07 02:21:07,648 WARN L194 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 122 [2020-11-07 02:21:08,929 WARN L194 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 122 [2020-11-07 02:21:10,159 WARN L194 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 127 [2020-11-07 02:21:11,215 WARN L194 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 122 [2020-11-07 02:21:12,573 WARN L194 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 122 [2020-11-07 02:21:13,825 WARN L194 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 127 [2020-11-07 02:21:14,909 WARN L194 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 117 [2020-11-07 02:21:16,236 WARN L194 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 117 [2020-11-07 02:21:17,480 WARN L194 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 122 [2020-11-07 02:21:18,539 WARN L194 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 117 [2020-11-07 02:21:19,898 WARN L194 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 117 [2020-11-07 02:21:21,213 WARN L194 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 122 [2020-11-07 02:21:22,269 WARN L194 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 112 [2020-11-07 02:21:23,623 WARN L194 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 112 [2020-11-07 02:21:24,891 WARN L194 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 117 [2020-11-07 02:21:25,979 WARN L194 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 112 [2020-11-07 02:21:27,404 WARN L194 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 107 [2020-11-07 02:21:28,702 WARN L194 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 112 [2020-11-07 02:21:29,808 WARN L194 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 107