/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:40:20,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:40:20,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:40:20,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:40:20,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:40:20,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:40:20,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:40:20,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:40:20,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:40:20,640 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:40:20,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:40:20,642 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:40:20,642 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:40:20,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:40:20,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:40:20,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:40:20,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:40:20,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:40:20,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:40:20,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:40:20,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:40:20,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:40:20,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:40:20,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:40:20,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:40:20,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:40:20,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:40:20,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:40:20,686 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:40:20,712 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:40:20,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:40:20,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:40:20,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:40:20,715 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:40:20,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:40:20,715 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:40:20,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:40:20,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:40:20,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:40:20,717 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:40:20,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:40:20,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:40:20,718 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:40:20,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:40:20,718 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:40:20,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:40:20,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:40:20,719 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:40:20,719 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:40:20,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:40:20,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:40:20,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:40:20,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:40:20,720 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:40:20,721 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:40:20,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:40:20,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:40:20,721 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:40:21,023 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:40:21,036 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:40:21,040 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:40:21,041 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:40:21,042 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:40:21,042 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2019-11-06 18:40:21,105 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3536119ef/c7a90022a62e48ae9f73003c62f55f09/FLAG5cafe44f1 [2019-11-06 18:40:21,531 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:40:21,532 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2019-11-06 18:40:21,538 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3536119ef/c7a90022a62e48ae9f73003c62f55f09/FLAG5cafe44f1 [2019-11-06 18:40:21,954 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3536119ef/c7a90022a62e48ae9f73003c62f55f09 [2019-11-06 18:40:21,964 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:40:21,966 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:40:21,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:40:21,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:40:21,974 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:40:21,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:40:21" (1/1) ... [2019-11-06 18:40:21,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6db4361f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:21, skipping insertion in model container [2019-11-06 18:40:21,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:40:21" (1/1) ... [2019-11-06 18:40:21,989 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:40:22,005 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:40:22,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:40:22,230 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:40:22,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:40:22,291 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:40:22,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:22 WrapperNode [2019-11-06 18:40:22,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:40:22,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:40:22,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:40:22,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:40:22,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:22" (1/1) ... [2019-11-06 18:40:22,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:22" (1/1) ... [2019-11-06 18:40:22,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:22" (1/1) ... [2019-11-06 18:40:22,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:22" (1/1) ... [2019-11-06 18:40:22,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:22" (1/1) ... [2019-11-06 18:40:22,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:22" (1/1) ... [2019-11-06 18:40:22,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:22" (1/1) ... [2019-11-06 18:40:22,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:40:22,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:40:22,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:40:22,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:40:22,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:22" (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 [2019-11-06 18:40:22,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:40:22,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:40:22,509 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:40:22,509 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:40:22,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:40:22,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:40:22,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:40:22,510 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:40:22,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:40:22,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:40:22,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:40:22,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:40:22,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:40:22,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:40:22,796 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:40:22,796 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-06 18:40:22,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:40:22 BoogieIcfgContainer [2019-11-06 18:40:22,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:40:22,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:40:22,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:40:22,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:40:22,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:40:21" (1/3) ... [2019-11-06 18:40:22,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@291cfb37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:40:22, skipping insertion in model container [2019-11-06 18:40:22,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:40:22" (2/3) ... [2019-11-06 18:40:22,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@291cfb37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:40:22, skipping insertion in model container [2019-11-06 18:40:22,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:40:22" (3/3) ... [2019-11-06 18:40:22,805 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2019-11-06 18:40:22,816 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:40:22,823 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:40:22,836 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:40:22,867 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:40:22,867 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:40:22,867 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:40:22,868 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:40:22,868 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:40:22,868 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:40:22,868 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:40:22,868 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:40:22,884 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-06 18:40:22,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:40:22,890 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:22,890 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:22,892 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:22,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:22,897 INFO L82 PathProgramCache]: Analyzing trace with hash -526773211, now seen corresponding path program 1 times [2019-11-06 18:40:22,906 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:22,906 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266850891] [2019-11-06 18:40:22,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:23,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:40:23,081 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266850891] [2019-11-06 18:40:23,082 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:40:23,082 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:40:23,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801571602] [2019-11-06 18:40:23,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:40:23,088 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:23,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:40:23,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:40:23,113 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-11-06 18:40:23,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:23,259 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2019-11-06 18:40:23,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:40:23,262 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-06 18:40:23,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:23,269 INFO L225 Difference]: With dead ends: 56 [2019-11-06 18:40:23,270 INFO L226 Difference]: Without dead ends: 27 [2019-11-06 18:40:23,273 INFO L630 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 [2019-11-06 18:40:23,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-06 18:40:23,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-06 18:40:23,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 18:40:23,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-11-06 18:40:23,307 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2019-11-06 18:40:23,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:23,308 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-11-06 18:40:23,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:40:23,308 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-11-06 18:40:23,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:40:23,309 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:23,309 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:23,310 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:23,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:23,310 INFO L82 PathProgramCache]: Analyzing trace with hash -777624222, now seen corresponding path program 1 times [2019-11-06 18:40:23,310 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:23,311 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873781273] [2019-11-06 18:40:23,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:23,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:40:23,399 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873781273] [2019-11-06 18:40:23,400 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:40:23,400 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:40:23,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85544389] [2019-11-06 18:40:23,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:40:23,406 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:23,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:40:23,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:40:23,410 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 4 states. [2019-11-06 18:40:23,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:23,572 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-11-06 18:40:23,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:40:23,574 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-06 18:40:23,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:23,575 INFO L225 Difference]: With dead ends: 48 [2019-11-06 18:40:23,576 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 18:40:23,578 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:40:23,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 18:40:23,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-06 18:40:23,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:40:23,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-11-06 18:40:23,595 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 16 [2019-11-06 18:40:23,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:23,596 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-11-06 18:40:23,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:40:23,597 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-11-06 18:40:23,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 18:40:23,598 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:23,599 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:23,599 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:23,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:23,600 INFO L82 PathProgramCache]: Analyzing trace with hash 2101592964, now seen corresponding path program 1 times [2019-11-06 18:40:23,601 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:23,601 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171353836] [2019-11-06 18:40:23,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:40:23,725 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171353836] [2019-11-06 18:40:23,726 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:40:23,726 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 18:40:23,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760556816] [2019-11-06 18:40:23,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:40:23,727 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:23,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:40:23,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:40:23,729 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 5 states. [2019-11-06 18:40:23,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:23,855 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-06 18:40:23,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:40:23,856 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-11-06 18:40:23,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:23,857 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:40:23,858 INFO L226 Difference]: Without dead ends: 33 [2019-11-06 18:40:23,858 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:40:23,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-06 18:40:23,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2019-11-06 18:40:23,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:40:23,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-11-06 18:40:23,869 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2019-11-06 18:40:23,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:23,870 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-11-06 18:40:23,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:40:23,870 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-11-06 18:40:23,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 18:40:23,872 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:23,872 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:23,873 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:23,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:23,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1818591568, now seen corresponding path program 1 times [2019-11-06 18:40:23,873 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:23,874 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230227668] [2019-11-06 18:40:23,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:24,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:24,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:40:24,006 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230227668] [2019-11-06 18:40:24,006 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:40:24,006 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 18:40:24,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223809722] [2019-11-06 18:40:24,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:40:24,007 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:24,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:40:24,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:40:24,008 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 6 states. [2019-11-06 18:40:24,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:24,205 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2019-11-06 18:40:24,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:40:24,207 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-11-06 18:40:24,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:24,208 INFO L225 Difference]: With dead ends: 62 [2019-11-06 18:40:24,208 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 18:40:24,209 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:40:24,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 18:40:24,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2019-11-06 18:40:24,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 18:40:24,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-11-06 18:40:24,219 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 21 [2019-11-06 18:40:24,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:24,219 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-11-06 18:40:24,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:40:24,220 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-11-06 18:40:24,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 18:40:24,221 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:24,221 INFO L410 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] [2019-11-06 18:40:24,221 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:24,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:24,222 INFO L82 PathProgramCache]: Analyzing trace with hash 334453631, now seen corresponding path program 1 times [2019-11-06 18:40:24,222 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:24,222 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199303577] [2019-11-06 18:40:24,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:40:24,332 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199303577] [2019-11-06 18:40:24,333 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782217335] [2019-11-06 18:40:24,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:24,390 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:40:24,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:40:24,450 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:24,450 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 18:40:24,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539962559] [2019-11-06 18:40:24,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:40:24,451 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:24,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:40:24,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:40:24,452 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 11 states. [2019-11-06 18:40:24,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:24,786 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2019-11-06 18:40:24,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:40:24,786 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2019-11-06 18:40:24,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:24,789 INFO L225 Difference]: With dead ends: 86 [2019-11-06 18:40:24,789 INFO L226 Difference]: Without dead ends: 62 [2019-11-06 18:40:24,790 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:40:24,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-06 18:40:24,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2019-11-06 18:40:24,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-06 18:40:24,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2019-11-06 18:40:24,799 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 26 [2019-11-06 18:40:24,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:24,799 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2019-11-06 18:40:24,799 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:40:24,800 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2019-11-06 18:40:24,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 18:40:24,801 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:24,801 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:25,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:25,005 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:25,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:25,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1076752728, now seen corresponding path program 2 times [2019-11-06 18:40:25,006 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:25,006 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167340540] [2019-11-06 18:40:25,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:40:25,151 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167340540] [2019-11-06 18:40:25,151 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251238452] [2019-11-06 18:40:25,151 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:25,202 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:40:25,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:25,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:40:25,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:25,237 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:40:25,238 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:25,238 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 13 [2019-11-06 18:40:25,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633125685] [2019-11-06 18:40:25,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:40:25,239 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:25,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:40:25,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:40:25,240 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 13 states. [2019-11-06 18:40:25,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:25,679 INFO L93 Difference]: Finished difference Result 145 states and 198 transitions. [2019-11-06 18:40:25,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:40:25,681 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2019-11-06 18:40:25,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:25,683 INFO L225 Difference]: With dead ends: 145 [2019-11-06 18:40:25,683 INFO L226 Difference]: Without dead ends: 116 [2019-11-06 18:40:25,684 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:40:25,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-06 18:40:25,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 63. [2019-11-06 18:40:25,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-06 18:40:25,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 84 transitions. [2019-11-06 18:40:25,705 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 84 transitions. Word has length 34 [2019-11-06 18:40:25,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:25,706 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 84 transitions. [2019-11-06 18:40:25,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:40:25,707 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 84 transitions. [2019-11-06 18:40:25,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-06 18:40:25,708 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:25,708 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:25,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:25,913 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:25,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:25,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1104086922, now seen corresponding path program 1 times [2019-11-06 18:40:25,914 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:25,914 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690086205] [2019-11-06 18:40:25,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-06 18:40:26,052 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690086205] [2019-11-06 18:40:26,052 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668117795] [2019-11-06 18:40:26,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:26,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:40:26,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:26,184 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:40:26,184 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:26,185 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-11-06 18:40:26,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935726763] [2019-11-06 18:40:26,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:40:26,186 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:26,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:40:26,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:40:26,186 INFO L87 Difference]: Start difference. First operand 63 states and 84 transitions. Second operand 13 states. [2019-11-06 18:40:26,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:26,526 INFO L93 Difference]: Finished difference Result 178 states and 250 transitions. [2019-11-06 18:40:26,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 18:40:26,528 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2019-11-06 18:40:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:26,530 INFO L225 Difference]: With dead ends: 178 [2019-11-06 18:40:26,530 INFO L226 Difference]: Without dead ends: 130 [2019-11-06 18:40:26,531 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:40:26,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-11-06 18:40:26,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 51. [2019-11-06 18:40:26,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 18:40:26,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2019-11-06 18:40:26,540 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 36 [2019-11-06 18:40:26,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:26,540 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2019-11-06 18:40:26,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:40:26,541 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2019-11-06 18:40:26,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 18:40:26,542 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:26,542 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:26,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:26,746 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:26,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:26,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1653847887, now seen corresponding path program 3 times [2019-11-06 18:40:26,747 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:26,747 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122633446] [2019-11-06 18:40:26,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:26,894 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-06 18:40:26,894 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122633446] [2019-11-06 18:40:26,894 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786129439] [2019-11-06 18:40:26,894 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:26,958 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:40:26,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:26,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:40:26,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:26,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:40:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-06 18:40:27,006 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:27,006 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 14 [2019-11-06 18:40:27,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262711047] [2019-11-06 18:40:27,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:40:27,008 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:27,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:40:27,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:40:27,008 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 14 states. [2019-11-06 18:40:27,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:27,487 INFO L93 Difference]: Finished difference Result 160 states and 221 transitions. [2019-11-06 18:40:27,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:40:27,488 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2019-11-06 18:40:27,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:27,489 INFO L225 Difference]: With dead ends: 160 [2019-11-06 18:40:27,489 INFO L226 Difference]: Without dead ends: 147 [2019-11-06 18:40:27,490 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2019-11-06 18:40:27,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-11-06 18:40:27,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 85. [2019-11-06 18:40:27,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-06 18:40:27,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2019-11-06 18:40:27,503 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 41 [2019-11-06 18:40:27,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:27,504 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2019-11-06 18:40:27,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:40:27,504 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2019-11-06 18:40:27,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-06 18:40:27,506 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:27,506 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:27,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:27,710 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:27,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:27,711 INFO L82 PathProgramCache]: Analyzing trace with hash -510083147, now seen corresponding path program 1 times [2019-11-06 18:40:27,712 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:27,712 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799723232] [2019-11-06 18:40:27,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-06 18:40:27,826 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799723232] [2019-11-06 18:40:27,827 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242761019] [2019-11-06 18:40:27,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:27,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:27,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:40:27,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 18:40:27,921 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:27,924 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2019-11-06 18:40:27,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704885132] [2019-11-06 18:40:27,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:40:27,925 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:27,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:40:27,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:40:27,925 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand 13 states. [2019-11-06 18:40:28,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:28,385 INFO L93 Difference]: Finished difference Result 366 states and 536 transitions. [2019-11-06 18:40:28,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-06 18:40:28,385 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2019-11-06 18:40:28,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:28,388 INFO L225 Difference]: With dead ends: 366 [2019-11-06 18:40:28,388 INFO L226 Difference]: Without dead ends: 298 [2019-11-06 18:40:28,389 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:40:28,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2019-11-06 18:40:28,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 93. [2019-11-06 18:40:28,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-06 18:40:28,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 128 transitions. [2019-11-06 18:40:28,406 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 128 transitions. Word has length 44 [2019-11-06 18:40:28,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:28,406 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 128 transitions. [2019-11-06 18:40:28,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:40:28,407 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 128 transitions. [2019-11-06 18:40:28,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-06 18:40:28,408 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:28,408 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:28,611 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:28,612 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:28,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:28,612 INFO L82 PathProgramCache]: Analyzing trace with hash -396829064, now seen corresponding path program 2 times [2019-11-06 18:40:28,613 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:28,613 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603343927] [2019-11-06 18:40:28,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 18:40:28,843 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603343927] [2019-11-06 18:40:28,843 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238225880] [2019-11-06 18:40:28,844 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:28,929 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:40:28,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:28,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:40:28,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:29,050 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-06 18:40:29,051 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:29,051 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2019-11-06 18:40:29,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528358448] [2019-11-06 18:40:29,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:40:29,055 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:29,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:40:29,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:40:29,056 INFO L87 Difference]: Start difference. First operand 93 states and 128 transitions. Second operand 18 states. [2019-11-06 18:40:30,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:30,158 INFO L93 Difference]: Finished difference Result 454 states and 670 transitions. [2019-11-06 18:40:30,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-06 18:40:30,159 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2019-11-06 18:40:30,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:30,161 INFO L225 Difference]: With dead ends: 454 [2019-11-06 18:40:30,161 INFO L226 Difference]: Without dead ends: 269 [2019-11-06 18:40:30,165 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=718, Invalid=2144, Unknown=0, NotChecked=0, Total=2862 [2019-11-06 18:40:30,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-11-06 18:40:30,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 105. [2019-11-06 18:40:30,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-06 18:40:30,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 131 transitions. [2019-11-06 18:40:30,188 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 131 transitions. Word has length 49 [2019-11-06 18:40:30,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:30,189 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 131 transitions. [2019-11-06 18:40:30,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:40:30,189 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 131 transitions. [2019-11-06 18:40:30,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-06 18:40:30,190 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:30,191 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:30,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:30,404 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:30,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:30,404 INFO L82 PathProgramCache]: Analyzing trace with hash -611115395, now seen corresponding path program 4 times [2019-11-06 18:40:30,405 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:30,405 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428403919] [2019-11-06 18:40:30,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-11-06 18:40:30,541 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428403919] [2019-11-06 18:40:30,542 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851040974] [2019-11-06 18:40:30,542 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:30,603 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:40:30,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:30,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:40:30,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-06 18:40:30,726 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:30,726 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-11-06 18:40:30,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271749744] [2019-11-06 18:40:30,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:40:30,727 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:30,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:40:30,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:40:30,728 INFO L87 Difference]: Start difference. First operand 105 states and 131 transitions. Second operand 19 states. [2019-11-06 18:40:31,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:31,731 INFO L93 Difference]: Finished difference Result 350 states and 472 transitions. [2019-11-06 18:40:31,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-06 18:40:31,731 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 63 [2019-11-06 18:40:31,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:31,733 INFO L225 Difference]: With dead ends: 350 [2019-11-06 18:40:31,733 INFO L226 Difference]: Without dead ends: 266 [2019-11-06 18:40:31,736 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=736, Invalid=1814, Unknown=0, NotChecked=0, Total=2550 [2019-11-06 18:40:31,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-11-06 18:40:31,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 114. [2019-11-06 18:40:31,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-06 18:40:31,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 147 transitions. [2019-11-06 18:40:31,751 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 147 transitions. Word has length 63 [2019-11-06 18:40:31,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:31,751 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 147 transitions. [2019-11-06 18:40:31,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:40:31,751 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 147 transitions. [2019-11-06 18:40:31,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-06 18:40:31,753 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:31,753 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 18, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:31,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:31,957 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:31,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:31,957 INFO L82 PathProgramCache]: Analyzing trace with hash 215199622, now seen corresponding path program 5 times [2019-11-06 18:40:31,957 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:31,957 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680608298] [2019-11-06 18:40:31,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 119 proven. 507 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-11-06 18:40:32,422 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680608298] [2019-11-06 18:40:32,422 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137014336] [2019-11-06 18:40:32,423 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:32,480 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-06 18:40:32,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:32,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:40:32,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:32,626 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:40:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 436 proven. 55 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2019-11-06 18:40:32,652 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:32,652 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 38 [2019-11-06 18:40:32,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137469176] [2019-11-06 18:40:32,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-06 18:40:32,653 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:32,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-06 18:40:32,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2019-11-06 18:40:32,654 INFO L87 Difference]: Start difference. First operand 114 states and 147 transitions. Second operand 38 states. [2019-11-06 18:40:36,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:36,704 INFO L93 Difference]: Finished difference Result 513 states and 733 transitions. [2019-11-06 18:40:36,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-11-06 18:40:36,704 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 107 [2019-11-06 18:40:36,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:36,707 INFO L225 Difference]: With dead ends: 513 [2019-11-06 18:40:36,707 INFO L226 Difference]: Without dead ends: 419 [2019-11-06 18:40:36,712 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3226 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2559, Invalid=10781, Unknown=0, NotChecked=0, Total=13340 [2019-11-06 18:40:36,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2019-11-06 18:40:36,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 205. [2019-11-06 18:40:36,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-11-06 18:40:36,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 263 transitions. [2019-11-06 18:40:36,736 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 263 transitions. Word has length 107 [2019-11-06 18:40:36,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:36,736 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 263 transitions. [2019-11-06 18:40:36,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-06 18:40:36,737 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 263 transitions. [2019-11-06 18:40:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-06 18:40:36,738 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:36,738 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 28, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:36,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:36,951 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:36,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:36,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1872470850, now seen corresponding path program 6 times [2019-11-06 18:40:36,951 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:36,951 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565352484] [2019-11-06 18:40:36,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 20 proven. 1198 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2019-11-06 18:40:37,181 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565352484] [2019-11-06 18:40:37,181 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975533392] [2019-11-06 18:40:37,181 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:37,316 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-06 18:40:37,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:37,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:40:37,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:37,375 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:40:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 0 proven. 1204 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-06 18:40:37,403 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:37,403 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 19 [2019-11-06 18:40:37,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534032434] [2019-11-06 18:40:37,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:40:37,404 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:37,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:40:37,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:40:37,405 INFO L87 Difference]: Start difference. First operand 205 states and 263 transitions. Second operand 19 states. [2019-11-06 18:40:38,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:38,356 INFO L93 Difference]: Finished difference Result 331 states and 424 transitions. [2019-11-06 18:40:38,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-06 18:40:38,357 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 137 [2019-11-06 18:40:38,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:38,361 INFO L225 Difference]: With dead ends: 331 [2019-11-06 18:40:38,361 INFO L226 Difference]: Without dead ends: 318 [2019-11-06 18:40:38,362 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=654, Invalid=1896, Unknown=0, NotChecked=0, Total=2550 [2019-11-06 18:40:38,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2019-11-06 18:40:38,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 229. [2019-11-06 18:40:38,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2019-11-06 18:40:38,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 295 transitions. [2019-11-06 18:40:38,387 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 295 transitions. Word has length 137 [2019-11-06 18:40:38,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:38,387 INFO L462 AbstractCegarLoop]: Abstraction has 229 states and 295 transitions. [2019-11-06 18:40:38,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:40:38,387 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 295 transitions. [2019-11-06 18:40:38,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-06 18:40:38,389 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:38,389 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 35, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:38,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:38,594 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:38,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:38,594 INFO L82 PathProgramCache]: Analyzing trace with hash 586009211, now seen corresponding path program 7 times [2019-11-06 18:40:38,595 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:38,595 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279131007] [2019-11-06 18:40:38,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2221 backedges. 672 proven. 159 refuted. 0 times theorem prover too weak. 1390 trivial. 0 not checked. [2019-11-06 18:40:38,813 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279131007] [2019-11-06 18:40:38,813 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888010469] [2019-11-06 18:40:38,814 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:38,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:40:38,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2221 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2157 trivial. 0 not checked. [2019-11-06 18:40:39,105 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:39,105 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 25 [2019-11-06 18:40:39,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569355693] [2019-11-06 18:40:39,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 18:40:39,106 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:39,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 18:40:39,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:40:39,107 INFO L87 Difference]: Start difference. First operand 229 states and 295 transitions. Second operand 25 states. [2019-11-06 18:40:41,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:41,183 INFO L93 Difference]: Finished difference Result 487 states and 638 transitions. [2019-11-06 18:40:41,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-11-06 18:40:41,185 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 161 [2019-11-06 18:40:41,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:41,187 INFO L225 Difference]: With dead ends: 487 [2019-11-06 18:40:41,188 INFO L226 Difference]: Without dead ends: 281 [2019-11-06 18:40:41,190 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2159 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2106, Invalid=5034, Unknown=0, NotChecked=0, Total=7140 [2019-11-06 18:40:41,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-11-06 18:40:41,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 234. [2019-11-06 18:40:41,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2019-11-06 18:40:41,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 302 transitions. [2019-11-06 18:40:41,213 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 302 transitions. Word has length 161 [2019-11-06 18:40:41,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:41,213 INFO L462 AbstractCegarLoop]: Abstraction has 234 states and 302 transitions. [2019-11-06 18:40:41,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-06 18:40:41,213 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 302 transitions. [2019-11-06 18:40:41,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-06 18:40:41,215 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:41,215 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 36, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:41,416 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:41,417 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:41,417 INFO L82 PathProgramCache]: Analyzing trace with hash -635882284, now seen corresponding path program 8 times [2019-11-06 18:40:41,418 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:41,418 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340676409] [2019-11-06 18:40:41,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2351 backedges. 23 proven. 1975 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2019-11-06 18:40:41,634 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340676409] [2019-11-06 18:40:41,635 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865202831] [2019-11-06 18:40:41,635 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:41,762 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:40:41,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:41,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:40:41,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2351 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2270 trivial. 0 not checked. [2019-11-06 18:40:41,834 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:41,834 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 20 [2019-11-06 18:40:41,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556995624] [2019-11-06 18:40:41,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:40:41,835 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:41,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:40:41,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:40:41,836 INFO L87 Difference]: Start difference. First operand 234 states and 302 transitions. Second operand 20 states. [2019-11-06 18:40:42,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:42,959 INFO L93 Difference]: Finished difference Result 573 states and 748 transitions. [2019-11-06 18:40:42,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-06 18:40:42,959 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 166 [2019-11-06 18:40:42,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:42,962 INFO L225 Difference]: With dead ends: 573 [2019-11-06 18:40:42,963 INFO L226 Difference]: Without dead ends: 364 [2019-11-06 18:40:42,965 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=826, Invalid=2366, Unknown=0, NotChecked=0, Total=3192 [2019-11-06 18:40:42,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2019-11-06 18:40:42,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 260. [2019-11-06 18:40:42,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2019-11-06 18:40:42,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 336 transitions. [2019-11-06 18:40:42,990 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 336 transitions. Word has length 166 [2019-11-06 18:40:42,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:42,990 INFO L462 AbstractCegarLoop]: Abstraction has 260 states and 336 transitions. [2019-11-06 18:40:42,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:40:42,990 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 336 transitions. [2019-11-06 18:40:42,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-11-06 18:40:42,993 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:42,993 INFO L410 BasicCegarLoop]: trace histogram [43, 43, 43, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:43,197 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:43,197 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:43,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:43,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1028235619, now seen corresponding path program 9 times [2019-11-06 18:40:43,198 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:43,199 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108684822] [2019-11-06 18:40:43,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3313 backedges. 1115 proven. 1903 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2019-11-06 18:40:43,752 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108684822] [2019-11-06 18:40:43,752 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905043343] [2019-11-06 18:40:43,752 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:43,929 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-06 18:40:43,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:43,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:40:43,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:43,984 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:40:44,007 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:40:44,033 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:40:44,034 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:40:44,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3313 backedges. 964 proven. 92 refuted. 0 times theorem prover too weak. 2257 trivial. 0 not checked. [2019-11-06 18:40:44,078 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:44,079 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 14] total 41 [2019-11-06 18:40:44,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827087756] [2019-11-06 18:40:44,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-06 18:40:44,080 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:44,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-06 18:40:44,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1446, Unknown=0, NotChecked=0, Total=1640 [2019-11-06 18:40:44,081 INFO L87 Difference]: Start difference. First operand 260 states and 336 transitions. Second operand 41 states.