/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:15:12,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:15:12,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:15:12,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:15:12,245 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:15:12,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:15:12,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:15:12,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:15:12,262 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:15:12,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:15:12,266 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:15:12,268 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:15:12,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:15:12,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:15:12,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:15:12,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:15:12,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:15:12,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:15:12,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:15:12,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:15:12,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:15:12,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:15:12,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:15:12,282 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:15:12,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:15:12,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:15:12,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:15:12,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:15:12,293 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 [2019-11-23 20:15:12,312 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:15:12,313 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:15:12,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:15:12,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:15:12,315 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:15:12,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:15:12,315 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:15:12,316 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:15:12,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:15:12,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:15:12,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:15:12,317 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:15:12,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:15:12,318 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:15:12,318 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:15:12,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:15:12,318 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:15:12,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:15:12,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:15:12,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:15:12,319 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:15:12,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:15:12,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:15:12,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:15:12,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:15:12,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:15:12,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:15:12,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:15:12,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:15:12,321 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:15:12,577 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:15:12,589 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:15:12,593 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:15:12,594 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:15:12,594 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:15:12,595 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum4.c [2019-11-23 20:15:12,655 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa491b35b/a39ac6e1a00945e4b7ffcc41dabe7119/FLAG2b6b1f1ee [2019-11-23 20:15:13,101 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:15:13,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum4.c [2019-11-23 20:15:13,107 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa491b35b/a39ac6e1a00945e4b7ffcc41dabe7119/FLAG2b6b1f1ee [2019-11-23 20:15:13,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa491b35b/a39ac6e1a00945e4b7ffcc41dabe7119 [2019-11-23 20:15:13,468 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:15:13,470 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:15:13,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:15:13,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:15:13,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:15:13,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:15:13" (1/1) ... [2019-11-23 20:15:13,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24b77595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:13, skipping insertion in model container [2019-11-23 20:15:13,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:15:13" (1/1) ... [2019-11-23 20:15:13,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:15:13,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:15:13,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:15:13,727 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:15:13,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:15:13,792 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:15:13,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:13 WrapperNode [2019-11-23 20:15:13,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:15:13,793 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:15:13,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:15:13,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:15:13,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:13" (1/1) ... [2019-11-23 20:15:13,882 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:13" (1/1) ... [2019-11-23 20:15:13,906 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:15:13,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:15:13,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:15:13,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:15:13,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:13" (1/1) ... [2019-11-23 20:15:13,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:13" (1/1) ... [2019-11-23 20:15:13,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:13" (1/1) ... [2019-11-23 20:15:13,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:13" (1/1) ... [2019-11-23 20:15:13,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:13" (1/1) ... [2019-11-23 20:15:13,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:13" (1/1) ... [2019-11-23 20:15:13,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:13" (1/1) ... [2019-11-23 20:15:13,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:15:13,934 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:15:13,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:15:13,935 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:15:13,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:13" (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 [2019-11-23 20:15:14,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:15:14,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:15:14,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:15:14,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:15:14,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:15:14,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:15:14,371 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:15:14,371 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 20:15:14,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:15:14 BoogieIcfgContainer [2019-11-23 20:15:14,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:15:14,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:15:14,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:15:14,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:15:14,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:15:13" (1/3) ... [2019-11-23 20:15:14,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d0bf595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:15:14, skipping insertion in model container [2019-11-23 20:15:14,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:13" (2/3) ... [2019-11-23 20:15:14,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d0bf595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:15:14, skipping insertion in model container [2019-11-23 20:15:14,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:15:14" (3/3) ... [2019-11-23 20:15:14,380 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum4.c [2019-11-23 20:15:14,389 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:15:14,396 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:15:14,407 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:15:14,428 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:15:14,428 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:15:14,428 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:15:14,429 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:15:14,429 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:15:14,429 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:15:14,429 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:15:14,429 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:15:14,445 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2019-11-23 20:15:14,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:15:14,452 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:14,453 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, 1, 1] [2019-11-23 20:15:14,454 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:14,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:14,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2094998668, now seen corresponding path program 1 times [2019-11-23 20:15:14,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:14,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956264131] [2019-11-23 20:15:14,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:14,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:14,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956264131] [2019-11-23 20:15:14,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:15:14,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:15:14,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623043340] [2019-11-23 20:15:14,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:15:14,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:14,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:15:14,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:15:14,604 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 2 states. [2019-11-23 20:15:14,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:14,627 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2019-11-23 20:15:14,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:15:14,628 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2019-11-23 20:15:14,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:14,636 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:15:14,637 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 20:15:14,640 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:15:14,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 20:15:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-23 20:15:14,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:15:14,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2019-11-23 20:15:14,676 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23 [2019-11-23 20:15:14,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:14,677 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2019-11-23 20:15:14,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:15:14,677 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2019-11-23 20:15:14,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:15:14,679 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:14,679 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, 1, 1] [2019-11-23 20:15:14,679 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:14,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:14,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1680934388, now seen corresponding path program 1 times [2019-11-23 20:15:14,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:14,681 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846055689] [2019-11-23 20:15:14,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:14,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846055689] [2019-11-23 20:15:14,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:15:14,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:15:14,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742537772] [2019-11-23 20:15:14,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:15:14,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:14,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:15:14,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:15:14,785 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 4 states. [2019-11-23 20:15:14,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:14,883 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2019-11-23 20:15:14,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:15:14,884 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-23 20:15:14,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:14,886 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:15:14,886 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 20:15:14,887 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:15:14,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 20:15:14,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-23 20:15:14,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:15:14,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2019-11-23 20:15:14,897 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 23 [2019-11-23 20:15:14,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:14,898 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2019-11-23 20:15:14,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:15:14,898 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2019-11-23 20:15:14,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:15:14,899 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:14,899 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, 1, 1, 1, 1] [2019-11-23 20:15:14,900 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:14,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:14,900 INFO L82 PathProgramCache]: Analyzing trace with hash -807143506, now seen corresponding path program 1 times [2019-11-23 20:15:14,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:14,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359228350] [2019-11-23 20:15:14,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:14,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:15:14,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359228350] [2019-11-23 20:15:14,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:15:14,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:15:14,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829524295] [2019-11-23 20:15:14,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:15:14,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:14,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:15:14,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:15:14,969 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand 3 states. [2019-11-23 20:15:15,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:15,037 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2019-11-23 20:15:15,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:15:15,038 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 20:15:15,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:15,039 INFO L225 Difference]: With dead ends: 93 [2019-11-23 20:15:15,039 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:15:15,041 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:15:15,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:15:15,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-11-23 20:15:15,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 20:15:15,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2019-11-23 20:15:15,056 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 25 [2019-11-23 20:15:15,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:15,057 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2019-11-23 20:15:15,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:15:15,057 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2019-11-23 20:15:15,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:15:15,058 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:15,058 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, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:15,058 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:15,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:15,059 INFO L82 PathProgramCache]: Analyzing trace with hash 293663568, now seen corresponding path program 1 times [2019-11-23 20:15:15,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:15,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105681412] [2019-11-23 20:15:15,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:15:15,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105681412] [2019-11-23 20:15:15,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:15:15,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:15:15,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142399153] [2019-11-23 20:15:15,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:15:15,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:15,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:15:15,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:15:15,162 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand 4 states. [2019-11-23 20:15:15,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:15,336 INFO L93 Difference]: Finished difference Result 88 states and 116 transitions. [2019-11-23 20:15:15,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:15:15,336 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-11-23 20:15:15,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:15,337 INFO L225 Difference]: With dead ends: 88 [2019-11-23 20:15:15,337 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:15:15,338 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:15:15,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:15:15,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2019-11-23 20:15:15,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:15:15,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2019-11-23 20:15:15,346 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 27 [2019-11-23 20:15:15,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:15,346 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2019-11-23 20:15:15,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:15:15,347 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2019-11-23 20:15:15,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:15:15,348 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:15,348 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:15,348 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:15,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:15,349 INFO L82 PathProgramCache]: Analyzing trace with hash -158323138, now seen corresponding path program 1 times [2019-11-23 20:15:15,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:15,349 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948915667] [2019-11-23 20:15:15,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:15,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:15:15,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948915667] [2019-11-23 20:15:15,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549275752] [2019-11-23 20:15:15,445 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 [2019-11-23 20:15:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:15,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:15:15,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:15:15,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:15,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 20:15:15,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912878436] [2019-11-23 20:15:15,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:15:15,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:15,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:15:15,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:15:15,587 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 6 states. [2019-11-23 20:15:15,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:15,664 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2019-11-23 20:15:15,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:15:15,668 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2019-11-23 20:15:15,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:15,669 INFO L225 Difference]: With dead ends: 81 [2019-11-23 20:15:15,669 INFO L226 Difference]: Without dead ends: 45 [2019-11-23 20:15:15,670 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:15:15,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-23 20:15:15,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-11-23 20:15:15,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:15:15,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2019-11-23 20:15:15,685 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 41 [2019-11-23 20:15:15,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:15,686 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2019-11-23 20:15:15,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:15:15,686 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2019-11-23 20:15:15,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:15:15,687 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:15,687 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:15,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:15,889 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:15,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:15,889 INFO L82 PathProgramCache]: Analyzing trace with hash 408266208, now seen corresponding path program 2 times [2019-11-23 20:15:15,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:15,890 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907470892] [2019-11-23 20:15:15,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:15:16,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907470892] [2019-11-23 20:15:16,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954799223] [2019-11-23 20:15:16,010 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 [2019-11-23 20:15:16,057 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:15:16,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:16,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:15:16,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:15:16,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:16,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2019-11-23 20:15:16,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919140891] [2019-11-23 20:15:16,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:15:16,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:16,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:15:16,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:15:16,093 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 7 states. [2019-11-23 20:15:16,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:16,266 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2019-11-23 20:15:16,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:15:16,267 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2019-11-23 20:15:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:16,268 INFO L225 Difference]: With dead ends: 100 [2019-11-23 20:15:16,268 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 20:15:16,271 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:15:16,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 20:15:16,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2019-11-23 20:15:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 20:15:16,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2019-11-23 20:15:16,278 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 43 [2019-11-23 20:15:16,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:16,278 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2019-11-23 20:15:16,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:15:16,279 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2019-11-23 20:15:16,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:15:16,280 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:16,280 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:16,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:16,484 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:16,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:16,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1004340752, now seen corresponding path program 3 times [2019-11-23 20:15:16,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:16,486 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553499549] [2019-11-23 20:15:16,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:17,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553499549] [2019-11-23 20:15:17,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599924490] [2019-11-23 20:15:17,474 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 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 [2019-11-23 20:15:17,542 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:15:17,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:17,546 WARN L253 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 86 conjunts are in the unsatisfiable core [2019-11-23 20:15:17,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:18,622 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:18,623 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2019-11-23 20:15:18,625 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-23 20:15:18,636 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:18,637 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:18,641 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:15:18,642 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:32 [2019-11-23 20:15:18,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:18,783 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:18,812 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:18,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:18,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 33 [2019-11-23 20:15:18,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332536005] [2019-11-23 20:15:18,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:15:18,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:18,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:15:18,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:15:18,876 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 33 states. [2019-11-23 20:15:20,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:20,924 INFO L93 Difference]: Finished difference Result 169 states and 193 transitions. [2019-11-23 20:15:20,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:15:20,930 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 59 [2019-11-23 20:15:20,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:20,932 INFO L225 Difference]: With dead ends: 169 [2019-11-23 20:15:20,932 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 20:15:20,934 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 45 SyntacticMatches, 21 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:15:20,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 20:15:20,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 101. [2019-11-23 20:15:20,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-23 20:15:20,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2019-11-23 20:15:20,948 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 59 [2019-11-23 20:15:20,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:20,948 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2019-11-23 20:15:20,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:15:20,948 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2019-11-23 20:15:20,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:15:20,950 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:20,950 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:21,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:21,159 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:21,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:21,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1580077422, now seen corresponding path program 4 times [2019-11-23 20:15:21,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:21,160 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145125459] [2019-11-23 20:15:21,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:15:21,238 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145125459] [2019-11-23 20:15:21,238 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986916035] [2019-11-23 20:15:21,238 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 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 [2019-11-23 20:15:21,299 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:15:21,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:21,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:15:21,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:15:21,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:21,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-23 20:15:21,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629361384] [2019-11-23 20:15:21,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:15:21,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:21,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:15:21,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:15:21,372 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand 13 states. [2019-11-23 20:15:21,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:21,709 INFO L93 Difference]: Finished difference Result 200 states and 230 transitions. [2019-11-23 20:15:21,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:15:21,709 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2019-11-23 20:15:21,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:21,710 INFO L225 Difference]: With dead ends: 200 [2019-11-23 20:15:21,710 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 20:15:21,711 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:15:21,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 20:15:21,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2019-11-23 20:15:21,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-23 20:15:21,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2019-11-23 20:15:21,739 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 61 [2019-11-23 20:15:21,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:21,739 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2019-11-23 20:15:21,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:15:21,742 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2019-11-23 20:15:21,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:15:21,744 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:21,744 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:21,945 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:21,945 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:21,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:21,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1107378484, now seen corresponding path program 5 times [2019-11-23 20:15:21,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:21,946 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593659881] [2019-11-23 20:15:21,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:22,035 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-23 20:15:22,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593659881] [2019-11-23 20:15:22,036 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233853106] [2019-11-23 20:15:22,036 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 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 [2019-11-23 20:15:22,191 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:15:22,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:22,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:15:22,196 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-23 20:15:22,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:22,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-23 20:15:22,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183783266] [2019-11-23 20:15:22,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:15:22,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:22,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:15:22,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:15:22,293 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand 13 states. [2019-11-23 20:15:22,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:22,643 INFO L93 Difference]: Finished difference Result 167 states and 195 transitions. [2019-11-23 20:15:22,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:15:22,643 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 63 [2019-11-23 20:15:22,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:22,644 INFO L225 Difference]: With dead ends: 167 [2019-11-23 20:15:22,645 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:15:22,646 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:15:22,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:15:22,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2019-11-23 20:15:22,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 20:15:22,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2019-11-23 20:15:22,654 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 63 [2019-11-23 20:15:22,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:22,654 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2019-11-23 20:15:22,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:15:22,654 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2019-11-23 20:15:22,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 20:15:22,656 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:22,656 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:22,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:22,861 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:22,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:22,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1152417058, now seen corresponding path program 6 times [2019-11-23 20:15:22,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:22,861 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427940071] [2019-11-23 20:15:22,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:23,674 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 14 [2019-11-23 20:15:23,827 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 23 [2019-11-23 20:15:24,000 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 34 [2019-11-23 20:15:24,186 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 34 [2019-11-23 20:15:24,357 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2019-11-23 20:15:24,554 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 31 [2019-11-23 20:15:24,719 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 32 [2019-11-23 20:15:24,864 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 27 [2019-11-23 20:15:25,034 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 29 [2019-11-23 20:15:25,201 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 33 [2019-11-23 20:15:25,412 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36 [2019-11-23 20:15:25,585 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 32 [2019-11-23 20:15:25,735 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 25 [2019-11-23 20:15:25,879 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 19 [2019-11-23 20:15:26,027 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 19 [2019-11-23 20:15:26,311 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 23 [2019-11-23 20:15:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:28,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427940071] [2019-11-23 20:15:28,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695753993] [2019-11-23 20:15:28,398 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 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 [2019-11-23 20:15:28,463 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:15:28,463 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:28,465 WARN L253 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 116 conjunts are in the unsatisfiable core [2019-11-23 20:15:28,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:28,576 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-23 20:15:28,576 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:15:28,588 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:28,589 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:15:28,589 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2019-11-23 20:15:36,430 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:36,431 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:15:36,433 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:36,434 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:15:36,435 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:36,436 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:15:36,436 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:15:36,437 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:15:36,450 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:15:36,473 INFO L343 Elim1Store]: treesize reduction 18, result has 51.4 percent of original size [2019-11-23 20:15:36,474 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 58 treesize of output 31 [2019-11-23 20:15:36,476 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:15:36,491 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:36,492 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:15:36,492 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:87, output treesize:3 [2019-11-23 20:15:36,514 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:36,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:36,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 43] total 78 [2019-11-23 20:15:36,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202761969] [2019-11-23 20:15:36,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-11-23 20:15:36,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:36,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-11-23 20:15:36,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=726, Invalid=5279, Unknown=1, NotChecked=0, Total=6006 [2019-11-23 20:15:36,624 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand 78 states. [2019-11-23 20:16:05,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:05,328 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2019-11-23 20:16:05,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 20:16:05,329 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2019-11-23 20:16:05,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:05,331 INFO L225 Difference]: With dead ends: 149 [2019-11-23 20:16:05,331 INFO L226 Difference]: Without dead ends: 145 [2019-11-23 20:16:05,334 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 31 SyntacticMatches, 42 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4775 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=962, Invalid=7225, Unknown=3, NotChecked=0, Total=8190 [2019-11-23 20:16:05,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-11-23 20:16:05,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 131. [2019-11-23 20:16:05,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-11-23 20:16:05,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 146 transitions. [2019-11-23 20:16:05,347 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 146 transitions. Word has length 77 [2019-11-23 20:16:05,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:05,347 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 146 transitions. [2019-11-23 20:16:05,347 INFO L463 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-11-23 20:16:05,347 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 146 transitions. [2019-11-23 20:16:05,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:16:05,349 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:05,349 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:05,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:05,553 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:05,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:05,554 INFO L82 PathProgramCache]: Analyzing trace with hash -214262460, now seen corresponding path program 7 times [2019-11-23 20:16:05,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:05,554 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924565528] [2019-11-23 20:16:05,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-23 20:16:05,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924565528] [2019-11-23 20:16:05,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671997319] [2019-11-23 20:16:05,658 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 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 [2019-11-23 20:16:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:05,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:16:05,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-23 20:16:05,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:05,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-11-23 20:16:05,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26121969] [2019-11-23 20:16:05,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:16:05,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:05,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:16:05,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:16:05,789 INFO L87 Difference]: Start difference. First operand 131 states and 146 transitions. Second operand 16 states. [2019-11-23 20:16:06,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:06,183 INFO L93 Difference]: Finished difference Result 260 states and 290 transitions. [2019-11-23 20:16:06,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:16:06,183 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2019-11-23 20:16:06,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:06,185 INFO L225 Difference]: With dead ends: 260 [2019-11-23 20:16:06,185 INFO L226 Difference]: Without dead ends: 134 [2019-11-23 20:16:06,186 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:16:06,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-11-23 20:16:06,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2019-11-23 20:16:06,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-11-23 20:16:06,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 148 transitions. [2019-11-23 20:16:06,196 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 148 transitions. Word has length 79 [2019-11-23 20:16:06,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:06,197 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 148 transitions. [2019-11-23 20:16:06,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:16:06,197 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 148 transitions. [2019-11-23 20:16:06,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-23 20:16:06,198 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:06,198 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:06,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:06,402 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:06,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:06,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1053510502, now seen corresponding path program 8 times [2019-11-23 20:16:06,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:06,403 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324132140] [2019-11-23 20:16:06,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:16:06,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324132140] [2019-11-23 20:16:06,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847141035] [2019-11-23 20:16:06,491 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 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 [2019-11-23 20:16:06,549 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:16:06,550 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:06,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:16:06,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:16:06,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:06,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-11-23 20:16:06,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957423184] [2019-11-23 20:16:06,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:16:06,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:06,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:16:06,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:16:06,610 INFO L87 Difference]: Start difference. First operand 133 states and 148 transitions. Second operand 16 states. [2019-11-23 20:16:07,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:07,036 INFO L93 Difference]: Finished difference Result 209 states and 237 transitions. [2019-11-23 20:16:07,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:16:07,036 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2019-11-23 20:16:07,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:07,038 INFO L225 Difference]: With dead ends: 209 [2019-11-23 20:16:07,038 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 20:16:07,039 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:16:07,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 20:16:07,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2019-11-23 20:16:07,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-23 20:16:07,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2019-11-23 20:16:07,046 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 81 [2019-11-23 20:16:07,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:07,046 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2019-11-23 20:16:07,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:16:07,046 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2019-11-23 20:16:07,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-23 20:16:07,047 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:07,047 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:07,250 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:07,251 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:07,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:07,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1202071596, now seen corresponding path program 9 times [2019-11-23 20:16:07,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:07,252 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941270402] [2019-11-23 20:16:07,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:08,567 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 12 [2019-11-23 20:16:08,734 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 14 [2019-11-23 20:16:08,941 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 23 [2019-11-23 20:16:09,199 WARN L192 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 39 [2019-11-23 20:16:09,479 WARN L192 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 32 [2019-11-23 20:16:09,739 WARN L192 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 41 [2019-11-23 20:16:10,003 WARN L192 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 37 [2019-11-23 20:16:10,301 WARN L192 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 38 [2019-11-23 20:16:10,539 WARN L192 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 34 [2019-11-23 20:16:10,812 WARN L192 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 35 [2019-11-23 20:16:11,035 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 30 [2019-11-23 20:16:11,267 WARN L192 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 35 [2019-11-23 20:16:11,498 WARN L192 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 32 [2019-11-23 20:16:11,775 WARN L192 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 36 [2019-11-23 20:16:12,055 WARN L192 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 33 [2019-11-23 20:16:12,343 WARN L192 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 36 [2019-11-23 20:16:12,613 WARN L192 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 32 [2019-11-23 20:16:12,848 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 25 [2019-11-23 20:16:13,040 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 22 [2019-11-23 20:16:13,239 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 22 [2019-11-23 20:16:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 1 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:16:15,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941270402] [2019-11-23 20:16:15,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682422397] [2019-11-23 20:16:15,919 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 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 [2019-11-23 20:16:15,994 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 20:16:15,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:16,003 WARN L253 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 153 conjunts are in the unsatisfiable core [2019-11-23 20:16:16,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:16,043 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:16:16,044 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:16:16,056 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:16:16,056 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:16:16,057 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2019-11-23 20:16:22,902 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:16:22,903 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:16:22,904 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:16:22,904 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:16:22,905 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:16:22,907 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:16:22,908 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:16:22,909 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:16:22,910 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:16:22,942 INFO L343 Elim1Store]: treesize reduction 18, result has 51.4 percent of original size [2019-11-23 20:16:22,942 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 62 treesize of output 31 [2019-11-23 20:16:22,943 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:16:22,953 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:16:22,954 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:16:22,954 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:78, output treesize:3 [2019-11-23 20:16:22,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:23,099 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 7 proven. 128 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:16:23,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:23,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 47] total 82 [2019-11-23 20:16:23,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435543831] [2019-11-23 20:16:23,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-11-23 20:16:23,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:23,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-11-23 20:16:23,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=592, Invalid=6049, Unknown=1, NotChecked=0, Total=6642 [2019-11-23 20:16:23,103 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand 82 states. [2019-11-23 20:16:25,438 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2019-11-23 20:16:31,366 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 49 [2019-11-23 20:16:32,701 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2019-11-23 20:16:37,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:37,690 INFO L93 Difference]: Finished difference Result 180 states and 195 transitions. [2019-11-23 20:16:37,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-23 20:16:37,691 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 95 [2019-11-23 20:16:37,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:37,693 INFO L225 Difference]: With dead ends: 180 [2019-11-23 20:16:37,693 INFO L226 Difference]: Without dead ends: 176 [2019-11-23 20:16:37,698 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 44 SyntacticMatches, 61 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6241 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=1204, Invalid=13074, Unknown=2, NotChecked=0, Total=14280 [2019-11-23 20:16:37,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-11-23 20:16:37,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 161. [2019-11-23 20:16:37,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-11-23 20:16:37,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 176 transitions. [2019-11-23 20:16:37,709 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 176 transitions. Word has length 95 [2019-11-23 20:16:37,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:37,709 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 176 transitions. [2019-11-23 20:16:37,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-11-23 20:16:37,710 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 176 transitions. [2019-11-23 20:16:37,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-23 20:16:37,711 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:37,711 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:37,911 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:37,912 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:37,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:37,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1175667574, now seen corresponding path program 10 times [2019-11-23 20:16:37,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:37,912 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727708091] [2019-11-23 20:16:37,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:37,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-23 20:16:38,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727708091] [2019-11-23 20:16:38,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611707243] [2019-11-23 20:16:38,032 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 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 [2019-11-23 20:16:38,122 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:16:38,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:38,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:16:38,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:38,223 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-23 20:16:38,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:38,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2019-11-23 20:16:38,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731281093] [2019-11-23 20:16:38,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:16:38,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:38,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:16:38,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:16:38,225 INFO L87 Difference]: Start difference. First operand 161 states and 176 transitions. Second operand 19 states. [2019-11-23 20:16:38,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:38,796 INFO L93 Difference]: Finished difference Result 320 states and 350 transitions. [2019-11-23 20:16:38,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:16:38,798 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2019-11-23 20:16:38,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:38,800 INFO L225 Difference]: With dead ends: 320 [2019-11-23 20:16:38,800 INFO L226 Difference]: Without dead ends: 164 [2019-11-23 20:16:38,801 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:16:38,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-11-23 20:16:38,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2019-11-23 20:16:38,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-11-23 20:16:38,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 178 transitions. [2019-11-23 20:16:38,813 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 178 transitions. Word has length 97 [2019-11-23 20:16:38,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:38,814 INFO L462 AbstractCegarLoop]: Abstraction has 163 states and 178 transitions. [2019-11-23 20:16:38,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:16:38,814 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 178 transitions. [2019-11-23 20:16:38,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 20:16:38,815 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:38,815 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:39,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:39,019 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:39,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:39,019 INFO L82 PathProgramCache]: Analyzing trace with hash -323654376, now seen corresponding path program 11 times [2019-11-23 20:16:39,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:39,019 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963550685] [2019-11-23 20:16:39,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-23 20:16:39,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963550685] [2019-11-23 20:16:39,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651930779] [2019-11-23 20:16:39,163 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 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 [2019-11-23 20:16:39,805 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:16:39,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:39,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:16:39,808 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-23 20:16:40,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:40,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2019-11-23 20:16:40,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613373997] [2019-11-23 20:16:40,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:16:40,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:40,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:16:40,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:16:40,014 INFO L87 Difference]: Start difference. First operand 163 states and 178 transitions. Second operand 24 states. [2019-11-23 20:16:40,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:40,681 INFO L93 Difference]: Finished difference Result 251 states and 279 transitions. [2019-11-23 20:16:40,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:16:40,681 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2019-11-23 20:16:40,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:40,683 INFO L225 Difference]: With dead ends: 251 [2019-11-23 20:16:40,683 INFO L226 Difference]: Without dead ends: 122 [2019-11-23 20:16:40,684 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:16:40,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-11-23 20:16:40,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2019-11-23 20:16:40,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 20:16:40,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2019-11-23 20:16:40,692 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 99 [2019-11-23 20:16:40,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:40,692 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2019-11-23 20:16:40,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:16:40,692 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2019-11-23 20:16:40,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 20:16:40,693 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:40,693 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:40,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:40,898 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:40,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:40,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1362635270, now seen corresponding path program 12 times [2019-11-23 20:16:40,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:40,899 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388825993] [2019-11-23 20:16:40,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:42,205 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 17 [2019-11-23 20:16:42,686 WARN L192 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 24 [2019-11-23 20:16:43,274 WARN L192 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 35 [2019-11-23 20:16:43,613 WARN L192 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 34 [2019-11-23 20:16:43,935 WARN L192 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 42 [2019-11-23 20:16:44,244 WARN L192 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 34 [2019-11-23 20:16:44,584 WARN L192 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 42 [2019-11-23 20:16:44,920 WARN L192 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 38 [2019-11-23 20:16:45,262 WARN L192 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 41 [2019-11-23 20:16:45,572 WARN L192 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 37 [2019-11-23 20:16:45,910 WARN L192 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 38 [2019-11-23 20:16:46,166 WARN L192 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 33 [2019-11-23 20:16:46,439 WARN L192 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 36 [2019-11-23 20:16:46,726 WARN L192 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 40 [2019-11-23 20:16:47,033 WARN L192 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 39 [2019-11-23 20:16:47,341 WARN L192 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 36 [2019-11-23 20:16:47,641 WARN L192 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 36 [2019-11-23 20:16:47,961 WARN L192 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 34 [2019-11-23 20:16:48,240 WARN L192 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 31 [2019-11-23 20:16:48,535 WARN L192 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 29 [2019-11-23 20:16:48,777 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 25 [2019-11-23 20:16:48,992 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 19 [2019-11-23 20:16:49,211 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 19