java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/xor3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:40:57,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:40:57,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:40:57,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:40:57,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:40:57,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:40:57,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:40:57,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:40:57,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:40:57,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:40:57,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:40:57,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:40:57,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:40:57,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:40:57,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:40:57,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:40:57,531 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:40:57,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:40:57,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:40:57,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:40:57,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:40:57,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:40:57,542 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:40:57,543 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:40:57,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:40:57,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:40:57,548 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:40:57,549 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:40:57,550 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:40:57,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:40:57,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:40:57,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:40:57,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:40:57,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:40:57,559 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:40:57,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:40:57,561 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:40:57,561 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:40:57,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:40:57,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:40:57,567 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:40:57,569 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 [2019-10-14 21:40:57,594 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:40:57,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:40:57,596 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:40:57,597 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:40:57,597 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:40:57,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:40:57,597 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:40:57,598 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:40:57,598 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:40:57,598 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:40:57,599 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:40:57,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:40:57,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:40:57,600 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:40:57,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:40:57,601 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:40:57,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:40:57,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:40:57,601 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:40:57,602 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:40:57,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:40:57,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:40:57,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:40:57,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:40:57,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:40:57,603 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:40:57,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:40:57,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:40:57,604 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:40:57,912 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:40:57,928 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:40:57,931 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:40:57,933 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:40:57,933 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:40:57,934 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/xor3.i [2019-10-14 21:40:57,996 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe71419e6/82d5984f3911424095cbb84d1ed9acbb/FLAG5be63d1d2 [2019-10-14 21:40:58,404 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:40:58,405 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/xor3.i [2019-10-14 21:40:58,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe71419e6/82d5984f3911424095cbb84d1ed9acbb/FLAG5be63d1d2 [2019-10-14 21:40:58,826 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe71419e6/82d5984f3911424095cbb84d1ed9acbb [2019-10-14 21:40:58,836 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:40:58,838 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:40:58,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:40:58,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:40:58,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:40:58,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:40:58" (1/1) ... [2019-10-14 21:40:58,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fac7d7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:58, skipping insertion in model container [2019-10-14 21:40:58,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:40:58" (1/1) ... [2019-10-14 21:40:58,855 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:40:58,874 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:40:59,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:40:59,135 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:40:59,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:40:59,266 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:40:59,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:59 WrapperNode [2019-10-14 21:40:59,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:40:59,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:40:59,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:40:59,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:40:59,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:59" (1/1) ... [2019-10-14 21:40:59,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:59" (1/1) ... [2019-10-14 21:40:59,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:59" (1/1) ... [2019-10-14 21:40:59,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:59" (1/1) ... [2019-10-14 21:40:59,305 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:59" (1/1) ... [2019-10-14 21:40:59,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:59" (1/1) ... [2019-10-14 21:40:59,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:59" (1/1) ... [2019-10-14 21:40:59,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:40:59,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:40:59,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:40:59,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:40:59,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:59" (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 [2019-10-14 21:40:59,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:40:59,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:40:59,376 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2019-10-14 21:40:59,376 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:40:59,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:40:59,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:40:59,376 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2019-10-14 21:40:59,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:40:59,376 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:40:59,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:40:59,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:40:59,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:40:59,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:40:59,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:40:59,718 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:40:59,719 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:40:59,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:40:59 BoogieIcfgContainer [2019-10-14 21:40:59,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:40:59,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:40:59,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:40:59,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:40:59,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:40:58" (1/3) ... [2019-10-14 21:40:59,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43cfd1b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:40:59, skipping insertion in model container [2019-10-14 21:40:59,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:59" (2/3) ... [2019-10-14 21:40:59,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43cfd1b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:40:59, skipping insertion in model container [2019-10-14 21:40:59,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:40:59" (3/3) ... [2019-10-14 21:40:59,728 INFO L109 eAbstractionObserver]: Analyzing ICFG xor3.i [2019-10-14 21:40:59,738 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:40:59,745 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:40:59,756 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:40:59,778 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:40:59,779 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:40:59,779 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:40:59,779 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:40:59,779 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:40:59,779 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:40:59,779 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:40:59,779 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:40:59,795 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-14 21:40:59,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:40:59,802 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:59,803 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:59,805 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:59,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:59,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1461178031, now seen corresponding path program 1 times [2019-10-14 21:40:59,820 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:59,821 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105921317] [2019-10-14 21:40:59,821 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:59,821 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:59,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:41:00,035 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105921317] [2019-10-14 21:41:00,036 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:00,036 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:41:00,036 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081671260] [2019-10-14 21:41:00,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:41:00,041 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:00,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:41:00,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:41:00,058 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-10-14 21:41:00,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:00,168 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-10-14 21:41:00,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:41:00,171 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 21:41:00,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:00,181 INFO L225 Difference]: With dead ends: 54 [2019-10-14 21:41:00,181 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 21:41:00,185 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:41:00,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 21:41:00,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-14 21:41:00,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:41:00,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-14 21:41:00,226 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-10-14 21:41:00,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:00,226 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-14 21:41:00,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:41:00,227 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-14 21:41:00,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:41:00,229 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:00,229 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:00,230 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:00,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:00,230 INFO L82 PathProgramCache]: Analyzing trace with hash -595992629, now seen corresponding path program 1 times [2019-10-14 21:41:00,230 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:00,231 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465205085] [2019-10-14 21:41:00,231 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:00,231 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:00,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:41:00,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465205085] [2019-10-14 21:41:00,403 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137076462] [2019-10-14 21:41:00,403 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 [2019-10-14 21:41:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 21:41:00,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:41:00,536 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:41:00,537 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 21:41:00,537 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050730431] [2019-10-14 21:41:00,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:41:00,541 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:00,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:41:00,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:41:00,542 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-10-14 21:41:00,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:00,566 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-10-14 21:41:00,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:41:00,567 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 21:41:00,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:00,569 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:41:00,569 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 21:41:00,571 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:41:00,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 21:41:00,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-14 21:41:00,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:41:00,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-14 21:41:00,587 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-10-14 21:41:00,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:00,587 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-14 21:41:00,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:41:00,588 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-14 21:41:00,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 21:41:00,590 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:00,590 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:41:00,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:00,794 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:00,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:00,795 INFO L82 PathProgramCache]: Analyzing trace with hash 169606189, now seen corresponding path program 1 times [2019-10-14 21:41:00,796 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:00,796 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819282796] [2019-10-14 21:41:00,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:00,797 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:00,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:41:00,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819282796] [2019-10-14 21:41:00,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704151101] [2019-10-14 21:41:00,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 21:41:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 21:41:01,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:01,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:41:01,033 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:41:01,033 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-10-14 21:41:01,033 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682654137] [2019-10-14 21:41:01,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:41:01,034 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:01,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:41:01,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:41:01,035 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-10-14 21:41:01,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:01,048 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-10-14 21:41:01,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:41:01,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-14 21:41:01,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:01,050 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:41:01,050 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 21:41:01,051 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:41:01,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 21:41:01,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-14 21:41:01,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:41:01,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-14 21:41:01,057 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-10-14 21:41:01,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:01,058 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-14 21:41:01,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:41:01,058 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-14 21:41:01,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 21:41:01,059 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:01,060 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:41:01,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:01,272 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:01,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:01,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1462689141, now seen corresponding path program 1 times [2019-10-14 21:41:01,274 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:01,274 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745971670] [2019-10-14 21:41:01,274 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:01,274 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:01,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,406 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:41:01,406 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745971670] [2019-10-14 21:41:01,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827171581] [2019-10-14 21:41:01,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 21:41:01,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:41:01,479 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:41:01,480 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:41:01,480 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750537580] [2019-10-14 21:41:01,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:41:01,484 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:01,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:41:01,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:01,484 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-10-14 21:41:01,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:01,506 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-10-14 21:41:01,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:41:01,510 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-10-14 21:41:01,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:01,511 INFO L225 Difference]: With dead ends: 43 [2019-10-14 21:41:01,512 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:41:01,513 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:01,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:41:01,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 21:41:01,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:41:01,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-14 21:41:01,521 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-10-14 21:41:01,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:01,524 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-14 21:41:01,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:41:01,525 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-14 21:41:01,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 21:41:01,530 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:01,530 INFO L380 BasicCegarLoop]: trace histogram [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, 1] [2019-10-14 21:41:01,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:01,731 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:01,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:01,732 INFO L82 PathProgramCache]: Analyzing trace with hash -233991671, now seen corresponding path program 1 times [2019-10-14 21:41:01,732 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:01,733 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301164616] [2019-10-14 21:41:01,733 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:01,734 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:01,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:41:01,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301164616] [2019-10-14 21:41:01,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509996821] [2019-10-14 21:41:01,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 21:41:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:41:01,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-14 21:41:01,982 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:01,983 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-10-14 21:41:01,983 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001428683] [2019-10-14 21:41:01,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:41:01,984 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:01,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:41:01,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:41:01,985 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-10-14 21:41:02,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:02,117 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-10-14 21:41:02,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:41:02,117 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-10-14 21:41:02,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:02,118 INFO L225 Difference]: With dead ends: 55 [2019-10-14 21:41:02,119 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 21:41:02,122 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:41:02,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 21:41:02,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-10-14 21:41:02,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 21:41:02,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-14 21:41:02,139 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-10-14 21:41:02,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:02,140 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-14 21:41:02,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:41:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-14 21:41:02,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 21:41:02,143 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:02,143 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:02,344 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:02,345 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:02,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:02,345 INFO L82 PathProgramCache]: Analyzing trace with hash -52274487, now seen corresponding path program 2 times [2019-10-14 21:41:02,346 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:02,346 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010590582] [2019-10-14 21:41:02,347 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:02,347 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:02,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:41:02,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010590582] [2019-10-14 21:41:02,461 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370756092] [2019-10-14 21:41:02,461 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 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 [2019-10-14 21:41:02,525 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:02,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:02,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:02,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:41:02,566 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:02,566 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:41:02,567 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196564346] [2019-10-14 21:41:02,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:41:02,568 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:02,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:41:02,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:02,568 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-10-14 21:41:02,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:02,659 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-10-14 21:41:02,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:02,659 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-10-14 21:41:02,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:02,660 INFO L225 Difference]: With dead ends: 58 [2019-10-14 21:41:02,660 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 21:41:02,661 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:02,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 21:41:02,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-10-14 21:41:02,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:41:02,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-10-14 21:41:02,676 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-10-14 21:41:02,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:02,676 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-10-14 21:41:02,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:41:02,677 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-10-14 21:41:02,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 21:41:02,678 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:02,678 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 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] [2019-10-14 21:41:02,881 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:02,882 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:02,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:02,882 INFO L82 PathProgramCache]: Analyzing trace with hash 602858155, now seen corresponding path program 3 times [2019-10-14 21:41:02,882 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:02,883 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184069005] [2019-10-14 21:41:02,883 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:02,883 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:02,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:41:03,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184069005] [2019-10-14 21:41:03,009 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467833674] [2019-10-14 21:41:03,009 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 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 [2019-10-14 21:41:03,068 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:41:03,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:03,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:41:03,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-14 21:41:03,109 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:03,109 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-14 21:41:03,110 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325194750] [2019-10-14 21:41:03,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:41:03,110 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:03,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:41:03,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:41:03,111 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-10-14 21:41:03,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:03,208 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-10-14 21:41:03,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:41:03,209 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-10-14 21:41:03,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:03,210 INFO L225 Difference]: With dead ends: 63 [2019-10-14 21:41:03,210 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 21:41:03,210 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:41:03,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 21:41:03,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-10-14 21:41:03,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 21:41:03,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-10-14 21:41:03,217 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-10-14 21:41:03,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:03,217 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-10-14 21:41:03,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:41:03,217 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-10-14 21:41:03,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:41:03,218 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:03,218 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:03,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:03,422 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:03,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:03,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1804278027, now seen corresponding path program 4 times [2019-10-14 21:41:03,423 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:03,423 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451111128] [2019-10-14 21:41:03,424 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:03,424 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:03,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:03,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:03,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:41:03,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451111128] [2019-10-14 21:41:03,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314462806] [2019-10-14 21:41:03,543 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:03,596 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:41:03,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:03,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:41:03,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:41:03,626 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:03,626 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:41:03,626 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555273216] [2019-10-14 21:41:03,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:41:03,627 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:03,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:41:03,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:41:03,630 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-10-14 21:41:03,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:03,725 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-10-14 21:41:03,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:41:03,725 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-10-14 21:41:03,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:03,726 INFO L225 Difference]: With dead ends: 66 [2019-10-14 21:41:03,726 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 21:41:03,727 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:41:03,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 21:41:03,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-14 21:41:03,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:41:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-10-14 21:41:03,733 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 56 [2019-10-14 21:41:03,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:03,734 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-10-14 21:41:03,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:41:03,734 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-10-14 21:41:03,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-14 21:41:03,735 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:03,735 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:03,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:03,939 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:03,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:03,939 INFO L82 PathProgramCache]: Analyzing trace with hash 907456365, now seen corresponding path program 5 times [2019-10-14 21:41:03,939 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:03,940 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398648607] [2019-10-14 21:41:03,940 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:03,941 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:03,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:41:04,061 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398648607] [2019-10-14 21:41:04,061 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628416626] [2019-10-14 21:41:04,061 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:04,157 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 21:41:04,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:04,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:04,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 21:41:04,192 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:04,192 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 21:41:04,192 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42927411] [2019-10-14 21:41:04,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:41:04,193 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:04,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:41:04,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:41:04,194 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2019-10-14 21:41:04,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:04,344 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-10-14 21:41:04,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:41:04,345 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-10-14 21:41:04,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:04,346 INFO L225 Difference]: With dead ends: 71 [2019-10-14 21:41:04,346 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 21:41:04,347 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:41:04,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 21:41:04,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-10-14 21:41:04,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 21:41:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-10-14 21:41:04,353 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 58 [2019-10-14 21:41:04,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:04,353 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-10-14 21:41:04,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:41:04,354 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-10-14 21:41:04,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 21:41:04,355 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:04,355 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:04,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:04,566 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:04,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:04,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1617233875, now seen corresponding path program 6 times [2019-10-14 21:41:04,567 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:04,568 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746388915] [2019-10-14 21:41:04,568 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:04,568 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:04,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-14 21:41:04,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746388915] [2019-10-14 21:41:04,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319614078] [2019-10-14 21:41:04,667 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:04,748 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:41:04,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:04,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:41:04,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-10-14 21:41:04,796 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:04,796 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-10-14 21:41:04,796 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789257347] [2019-10-14 21:41:04,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:41:04,797 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:04,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:41:04,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:41:04,797 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-10-14 21:41:04,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:04,986 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-10-14 21:41:04,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:41:04,987 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-10-14 21:41:04,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:04,988 INFO L225 Difference]: With dead ends: 77 [2019-10-14 21:41:04,988 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 21:41:04,989 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:41:04,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 21:41:05,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-10-14 21:41:05,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:41:05,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-10-14 21:41:05,010 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 66 [2019-10-14 21:41:05,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:05,012 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-10-14 21:41:05,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:41:05,012 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-10-14 21:41:05,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-14 21:41:05,015 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:05,015 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:05,229 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:05,230 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:05,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:05,231 INFO L82 PathProgramCache]: Analyzing trace with hash 592539373, now seen corresponding path program 7 times [2019-10-14 21:41:05,231 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:05,231 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650300447] [2019-10-14 21:41:05,232 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:05,232 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:05,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:05,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:41:05,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650300447] [2019-10-14 21:41:05,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890883739] [2019-10-14 21:41:05,338 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:05,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:41:05,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:05,440 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:41:05,440 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:05,441 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:41:05,441 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886228328] [2019-10-14 21:41:05,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:41:05,442 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:05,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:41:05,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:41:05,442 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2019-10-14 21:41:05,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:05,532 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-10-14 21:41:05,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:41:05,532 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-10-14 21:41:05,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:05,533 INFO L225 Difference]: With dead ends: 80 [2019-10-14 21:41:05,533 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 21:41:05,534 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:41:05,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 21:41:05,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-10-14 21:41:05,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:41:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-10-14 21:41:05,540 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 74 [2019-10-14 21:41:05,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:05,540 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-10-14 21:41:05,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:41:05,541 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-10-14 21:41:05,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-14 21:41:05,542 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:05,542 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:05,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:05,747 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:05,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:05,747 INFO L82 PathProgramCache]: Analyzing trace with hash 295497935, now seen corresponding path program 8 times [2019-10-14 21:41:05,748 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:05,748 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903326088] [2019-10-14 21:41:05,748 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:05,748 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:05,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:05,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:05,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:41:05,892 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903326088] [2019-10-14 21:41:05,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124426729] [2019-10-14 21:41:05,893 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:05,963 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:05,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:05,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:41:05,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:41:05,999 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:06,000 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:41:06,000 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575893708] [2019-10-14 21:41:06,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:41:06,001 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:06,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:41:06,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:41:06,003 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2019-10-14 21:41:06,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:06,107 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2019-10-14 21:41:06,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:41:06,108 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-10-14 21:41:06,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:06,109 INFO L225 Difference]: With dead ends: 82 [2019-10-14 21:41:06,109 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 21:41:06,110 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:41:06,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 21:41:06,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-10-14 21:41:06,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:41:06,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-10-14 21:41:06,119 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-10-14 21:41:06,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:06,120 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-10-14 21:41:06,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:41:06,120 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-10-14 21:41:06,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 21:41:06,121 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:06,121 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:06,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:06,324 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:06,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:06,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1693482447, now seen corresponding path program 9 times [2019-10-14 21:41:06,324 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:06,324 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648362244] [2019-10-14 21:41:06,324 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:06,324 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:06,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:06,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:41:06,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648362244] [2019-10-14 21:41:06,471 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172647303] [2019-10-14 21:41:06,471 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:06,541 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 21:41:06,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:06,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:06,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-10-14 21:41:06,607 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:06,607 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-10-14 21:41:06,608 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344061569] [2019-10-14 21:41:06,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:41:06,609 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:06,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:41:06,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:41:06,609 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2019-10-14 21:41:06,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:06,767 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-10-14 21:41:06,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 21:41:06,768 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-10-14 21:41:06,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:06,769 INFO L225 Difference]: With dead ends: 87 [2019-10-14 21:41:06,769 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 21:41:06,769 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:41:06,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 21:41:06,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-10-14 21:41:06,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 21:41:06,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2019-10-14 21:41:06,776 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 78 [2019-10-14 21:41:06,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:06,776 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2019-10-14 21:41:06,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:41:06,776 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2019-10-14 21:41:06,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-14 21:41:06,777 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:06,778 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 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] [2019-10-14 21:41:06,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:06,988 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:06,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:06,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1088178321, now seen corresponding path program 10 times [2019-10-14 21:41:06,989 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:06,989 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282425579] [2019-10-14 21:41:06,990 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:06,990 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:06,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:07,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-10-14 21:41:07,131 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282425579] [2019-10-14 21:41:07,131 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334075062] [2019-10-14 21:41:07,132 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:07,201 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:41:07,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:07,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:41:07,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-10-14 21:41:07,305 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:07,305 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-10-14 21:41:07,305 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573525427] [2019-10-14 21:41:07,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:41:07,306 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:07,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:41:07,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:41:07,307 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2019-10-14 21:41:07,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:07,561 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-10-14 21:41:07,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:41:07,561 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2019-10-14 21:41:07,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:07,562 INFO L225 Difference]: With dead ends: 93 [2019-10-14 21:41:07,563 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 21:41:07,565 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:41:07,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 21:41:07,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-10-14 21:41:07,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 21:41:07,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-10-14 21:41:07,576 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2019-10-14 21:41:07,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:07,577 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-10-14 21:41:07,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:41:07,577 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-10-14 21:41:07,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-14 21:41:07,578 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:07,578 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 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] [2019-10-14 21:41:07,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:07,779 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:07,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:07,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1682227375, now seen corresponding path program 11 times [2019-10-14 21:41:07,780 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:07,780 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886127348] [2019-10-14 21:41:07,781 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:07,781 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:07,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:07,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-10-14 21:41:07,929 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886127348] [2019-10-14 21:41:07,929 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684477509] [2019-10-14 21:41:07,929 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:08,250 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 21:41:08,250 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:08,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:41:08,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-10-14 21:41:08,349 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:08,350 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-10-14 21:41:08,350 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623705354] [2019-10-14 21:41:08,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:41:08,351 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:08,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:41:08,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:41:08,352 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 21 states. [2019-10-14 21:41:08,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:08,639 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-10-14 21:41:08,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:41:08,640 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2019-10-14 21:41:08,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:08,641 INFO L225 Difference]: With dead ends: 99 [2019-10-14 21:41:08,641 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 21:41:08,642 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:41:08,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 21:41:08,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-10-14 21:41:08,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 21:41:08,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-10-14 21:41:08,648 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 90 [2019-10-14 21:41:08,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:08,648 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-10-14 21:41:08,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:41:08,648 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-10-14 21:41:08,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-14 21:41:08,649 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:08,650 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 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] [2019-10-14 21:41:08,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:08,861 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:08,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:08,861 INFO L82 PathProgramCache]: Analyzing trace with hash -204807151, now seen corresponding path program 12 times [2019-10-14 21:41:08,862 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:08,862 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834121864] [2019-10-14 21:41:08,862 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:08,862 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:08,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 21:41:09,024 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834121864] [2019-10-14 21:41:09,024 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094322139] [2019-10-14 21:41:09,025 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:09,134 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-14 21:41:09,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:09,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:41:09,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:09,196 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 178 proven. 9 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2019-10-14 21:41:09,197 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:09,197 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-10-14 21:41:09,197 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206099464] [2019-10-14 21:41:09,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:41:09,198 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:09,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:41:09,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:41:09,199 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 20 states. [2019-10-14 21:41:09,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:09,384 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2019-10-14 21:41:09,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:41:09,385 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-10-14 21:41:09,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:09,386 INFO L225 Difference]: With dead ends: 105 [2019-10-14 21:41:09,386 INFO L226 Difference]: Without dead ends: 71 [2019-10-14 21:41:09,387 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:41:09,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-14 21:41:09,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-10-14 21:41:09,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-14 21:41:09,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-10-14 21:41:09,401 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 98 [2019-10-14 21:41:09,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:09,401 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-10-14 21:41:09,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:41:09,402 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-10-14 21:41:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-14 21:41:09,403 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:09,403 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:09,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:09,607 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:09,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:09,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1908818575, now seen corresponding path program 13 times [2019-10-14 21:41:09,608 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:09,608 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709139017] [2019-10-14 21:41:09,608 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:09,608 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:09,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:41:09,817 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709139017] [2019-10-14 21:41:09,818 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363453147] [2019-10-14 21:41:09,818 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:41:09,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:41:09,913 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:09,914 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 21:41:09,914 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933397095] [2019-10-14 21:41:09,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:41:09,914 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:09,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:41:09,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:41:09,915 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 18 states. [2019-10-14 21:41:10,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:10,028 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-10-14 21:41:10,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:41:10,028 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2019-10-14 21:41:10,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:10,029 INFO L225 Difference]: With dead ends: 108 [2019-10-14 21:41:10,029 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 21:41:10,030 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:41:10,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 21:41:10,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-10-14 21:41:10,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 21:41:10,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-10-14 21:41:10,035 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 102 [2019-10-14 21:41:10,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:10,035 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-10-14 21:41:10,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:41:10,036 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-10-14 21:41:10,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-14 21:41:10,037 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:10,037 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 14, 14, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:10,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:10,238 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:10,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:10,239 INFO L82 PathProgramCache]: Analyzing trace with hash 682719315, now seen corresponding path program 14 times [2019-10-14 21:41:10,239 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:10,239 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65173437] [2019-10-14 21:41:10,240 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:10,240 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:10,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:10,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:41:10,449 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65173437] [2019-10-14 21:41:10,449 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920999793] [2019-10-14 21:41:10,449 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:10,527 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:10,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:10,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:41:10,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:41:10,559 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:10,559 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 21:41:10,559 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638789065] [2019-10-14 21:41:10,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:41:10,560 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:10,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:41:10,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:41:10,561 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 19 states. [2019-10-14 21:41:10,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:10,698 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-10-14 21:41:10,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:41:10,699 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-10-14 21:41:10,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:10,700 INFO L225 Difference]: With dead ends: 110 [2019-10-14 21:41:10,700 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 21:41:10,701 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:41:10,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 21:41:10,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-14 21:41:10,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 21:41:10,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-10-14 21:41:10,707 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 104 [2019-10-14 21:41:10,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:10,707 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-10-14 21:41:10,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:41:10,708 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-10-14 21:41:10,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-14 21:41:10,709 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:10,709 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:10,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:10,914 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:10,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:10,915 INFO L82 PathProgramCache]: Analyzing trace with hash 69599925, now seen corresponding path program 15 times [2019-10-14 21:41:10,915 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:10,916 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083692267] [2019-10-14 21:41:10,916 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:10,916 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:10,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:41:11,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083692267] [2019-10-14 21:41:11,153 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103736997] [2019-10-14 21:41:11,153 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:11,239 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:41:11,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:11,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:41:11,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:11,324 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-10-14 21:41:11,324 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:11,324 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-10-14 21:41:11,324 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505975902] [2019-10-14 21:41:11,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:41:11,326 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:11,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:41:11,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:41:11,328 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 24 states. [2019-10-14 21:41:11,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:11,601 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2019-10-14 21:41:11,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:41:11,602 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2019-10-14 21:41:11,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:11,603 INFO L225 Difference]: With dead ends: 115 [2019-10-14 21:41:11,603 INFO L226 Difference]: Without dead ends: 79 [2019-10-14 21:41:11,604 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:41:11,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-14 21:41:11,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-10-14 21:41:11,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 21:41:11,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-10-14 21:41:11,610 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 106 [2019-10-14 21:41:11,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:11,610 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-10-14 21:41:11,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:41:11,611 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-10-14 21:41:11,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-14 21:41:11,612 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:11,612 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:11,817 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:11,818 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:11,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:11,818 INFO L82 PathProgramCache]: Analyzing trace with hash -901824235, now seen corresponding path program 16 times [2019-10-14 21:41:11,819 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:11,819 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111740179] [2019-10-14 21:41:11,819 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:11,819 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:11,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 21:41:12,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111740179] [2019-10-14 21:41:12,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939551793] [2019-10-14 21:41:12,077 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:12,155 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:41:12,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:12,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:41:12,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 21:41:12,179 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:12,180 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 21:41:12,180 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455163081] [2019-10-14 21:41:12,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:41:12,180 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:12,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:41:12,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:41:12,181 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 21 states. [2019-10-14 21:41:12,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:12,341 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-10-14 21:41:12,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:41:12,342 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2019-10-14 21:41:12,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:12,343 INFO L225 Difference]: With dead ends: 118 [2019-10-14 21:41:12,343 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 21:41:12,344 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:41:12,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 21:41:12,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-10-14 21:41:12,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-14 21:41:12,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-10-14 21:41:12,348 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 110 [2019-10-14 21:41:12,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:12,349 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-10-14 21:41:12,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:41:12,349 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-10-14 21:41:12,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-14 21:41:12,350 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:12,350 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:12,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:12,554 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:12,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:12,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1698235913, now seen corresponding path program 17 times [2019-10-14 21:41:12,555 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:12,556 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122348628] [2019-10-14 21:41:12,556 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:12,556 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:12,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:12,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:12,842 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 21:41:12,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122348628] [2019-10-14 21:41:12,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499712202] [2019-10-14 21:41:12,843 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:13,381 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-10-14 21:41:13,381 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:13,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:41:13,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-10-14 21:41:13,513 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:13,514 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-10-14 21:41:13,514 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214434029] [2019-10-14 21:41:13,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:41:13,515 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:13,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:41:13,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:41:13,515 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 28 states. [2019-10-14 21:41:13,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:13,894 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2019-10-14 21:41:13,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 21:41:13,894 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2019-10-14 21:41:13,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:13,896 INFO L225 Difference]: With dead ends: 123 [2019-10-14 21:41:13,896 INFO L226 Difference]: Without dead ends: 85 [2019-10-14 21:41:13,897 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:41:13,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-14 21:41:13,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-10-14 21:41:13,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-14 21:41:13,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-10-14 21:41:13,903 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 112 [2019-10-14 21:41:13,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:13,903 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-10-14 21:41:13,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:41:13,903 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-10-14 21:41:13,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-14 21:41:13,904 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:13,904 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:14,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:14,110 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:14,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:14,110 INFO L82 PathProgramCache]: Analyzing trace with hash 112259767, now seen corresponding path program 18 times [2019-10-14 21:41:14,110 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:14,111 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098073372] [2019-10-14 21:41:14,111 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:14,111 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:14,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-10-14 21:41:14,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098073372] [2019-10-14 21:41:14,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277953381] [2019-10-14 21:41:14,380 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:14,952 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 21:41:14,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:14,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:41:14,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 269 proven. 25 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-10-14 21:41:15,119 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:15,119 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 30 [2019-10-14 21:41:15,120 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484375289] [2019-10-14 21:41:15,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 21:41:15,120 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:15,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 21:41:15,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:41:15,121 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 30 states. [2019-10-14 21:41:15,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:15,481 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2019-10-14 21:41:15,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 21:41:15,481 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 120 [2019-10-14 21:41:15,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:15,482 INFO L225 Difference]: With dead ends: 130 [2019-10-14 21:41:15,482 INFO L226 Difference]: Without dead ends: 90 [2019-10-14 21:41:15,484 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=336, Invalid=924, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:41:15,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-14 21:41:15,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-10-14 21:41:15,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-14 21:41:15,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-10-14 21:41:15,490 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 120 [2019-10-14 21:41:15,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:15,491 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-10-14 21:41:15,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 21:41:15,491 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-10-14 21:41:15,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-14 21:41:15,492 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:15,492 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:15,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:15,698 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:15,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:15,698 INFO L82 PathProgramCache]: Analyzing trace with hash 514208377, now seen corresponding path program 19 times [2019-10-14 21:41:15,698 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:15,699 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245160535] [2019-10-14 21:41:15,699 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:15,699 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:15,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:41:15,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245160535] [2019-10-14 21:41:15,983 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867043180] [2019-10-14 21:41:15,983 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:16,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:41:16,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:41:16,127 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:16,127 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-14 21:41:16,127 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462237275] [2019-10-14 21:41:16,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:41:16,128 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:16,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:41:16,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:41:16,129 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 25 states. [2019-10-14 21:41:16,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:16,242 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-10-14 21:41:16,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:41:16,243 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-10-14 21:41:16,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:16,244 INFO L225 Difference]: With dead ends: 134 [2019-10-14 21:41:16,244 INFO L226 Difference]: Without dead ends: 92 [2019-10-14 21:41:16,245 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:41:16,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-14 21:41:16,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-10-14 21:41:16,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-14 21:41:16,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-10-14 21:41:16,250 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 126 [2019-10-14 21:41:16,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:16,251 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-10-14 21:41:16,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:41:16,251 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-10-14 21:41:16,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-14 21:41:16,252 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:16,252 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:16,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:16,455 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:16,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:16,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1320413019, now seen corresponding path program 20 times [2019-10-14 21:41:16,457 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:16,457 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292304507] [2019-10-14 21:41:16,457 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:16,458 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:16,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:16,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:41:16,852 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292304507] [2019-10-14 21:41:16,853 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823615619] [2019-10-14 21:41:16,853 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:16,981 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:16,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:16,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 21:41:16,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:41:17,018 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:17,018 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2019-10-14 21:41:17,019 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986019728] [2019-10-14 21:41:17,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 21:41:17,019 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:17,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 21:41:17,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:41:17,020 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 26 states. [2019-10-14 21:41:17,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:17,210 INFO L93 Difference]: Finished difference Result 136 states and 144 transitions. [2019-10-14 21:41:17,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 21:41:17,211 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 128 [2019-10-14 21:41:17,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:17,212 INFO L225 Difference]: With dead ends: 136 [2019-10-14 21:41:17,212 INFO L226 Difference]: Without dead ends: 94 [2019-10-14 21:41:17,212 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:41:17,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-14 21:41:17,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-10-14 21:41:17,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-14 21:41:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2019-10-14 21:41:17,218 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 128 [2019-10-14 21:41:17,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:17,218 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2019-10-14 21:41:17,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 21:41:17,219 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2019-10-14 21:41:17,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-14 21:41:17,219 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:17,220 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:17,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:17,424 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:17,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:17,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1306006595, now seen corresponding path program 21 times [2019-10-14 21:41:17,425 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:17,425 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978508372] [2019-10-14 21:41:17,426 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:17,426 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:17,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:41:17,749 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978508372] [2019-10-14 21:41:17,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71591704] [2019-10-14 21:41:17,750 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:17,865 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-14 21:41:17,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:17,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:41:17,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 234 proven. 36 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2019-10-14 21:41:17,989 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:17,989 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 33 [2019-10-14 21:41:17,990 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656328475] [2019-10-14 21:41:17,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 21:41:17,990 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:17,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 21:41:17,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 21:41:17,991 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 33 states. [2019-10-14 21:41:18,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:18,316 INFO L93 Difference]: Finished difference Result 141 states and 150 transitions. [2019-10-14 21:41:18,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-14 21:41:18,317 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 130 [2019-10-14 21:41:18,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:18,318 INFO L225 Difference]: With dead ends: 141 [2019-10-14 21:41:18,318 INFO L226 Difference]: Without dead ends: 99 [2019-10-14 21:41:18,319 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 21:41:18,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-14 21:41:18,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2019-10-14 21:41:18,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-14 21:41:18,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-10-14 21:41:18,323 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 130 [2019-10-14 21:41:18,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:18,324 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-10-14 21:41:18,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-14 21:41:18,324 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-10-14 21:41:18,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-14 21:41:18,325 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:18,325 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:18,529 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:18,529 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:18,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:18,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1262417379, now seen corresponding path program 22 times [2019-10-14 21:41:18,530 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:18,530 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805632387] [2019-10-14 21:41:18,530 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:18,530 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:18,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-14 21:41:18,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805632387] [2019-10-14 21:41:18,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30149123] [2019-10-14 21:41:18,906 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:19,058 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:41:19,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:19,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 21:41:19,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-14 21:41:19,124 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:19,124 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-10-14 21:41:19,124 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690119708] [2019-10-14 21:41:19,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:41:19,125 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:19,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:41:19,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:41:19,127 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 28 states. [2019-10-14 21:41:19,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:19,424 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2019-10-14 21:41:19,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:41:19,424 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 134 [2019-10-14 21:41:19,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:19,425 INFO L225 Difference]: With dead ends: 144 [2019-10-14 21:41:19,425 INFO L226 Difference]: Without dead ends: 100 [2019-10-14 21:41:19,426 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:41:19,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-14 21:41:19,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2019-10-14 21:41:19,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-14 21:41:19,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2019-10-14 21:41:19,433 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 134 [2019-10-14 21:41:19,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:19,434 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2019-10-14 21:41:19,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:41:19,434 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2019-10-14 21:41:19,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-14 21:41:19,436 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:19,437 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:19,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:19,642 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:19,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:19,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1975206657, now seen corresponding path program 23 times [2019-10-14 21:41:19,643 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:19,643 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026964479] [2019-10-14 21:41:19,643 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:19,644 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:19,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:20,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:20,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-14 21:41:20,144 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026964479] [2019-10-14 21:41:20,144 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990207863] [2019-10-14 21:41:20,144 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:21,628 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-10-14 21:41:21,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:21,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:41:21,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 228 proven. 49 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2019-10-14 21:41:21,810 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:21,811 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-10-14 21:41:21,811 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725301884] [2019-10-14 21:41:21,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 21:41:21,812 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:21,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 21:41:21,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:41:21,813 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 36 states. [2019-10-14 21:41:22,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:22,471 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2019-10-14 21:41:22,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-14 21:41:22,472 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 136 [2019-10-14 21:41:22,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:22,473 INFO L225 Difference]: With dead ends: 149 [2019-10-14 21:41:22,473 INFO L226 Difference]: Without dead ends: 105 [2019-10-14 21:41:22,475 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2019-10-14 21:41:22,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-14 21:41:22,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2019-10-14 21:41:22,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-10-14 21:41:22,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2019-10-14 21:41:22,482 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 136 [2019-10-14 21:41:22,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:22,482 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2019-10-14 21:41:22,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 21:41:22,482 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2019-10-14 21:41:22,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-14 21:41:22,487 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:22,487 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:22,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:22,695 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:22,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:22,696 INFO L82 PathProgramCache]: Analyzing trace with hash -702773313, now seen corresponding path program 24 times [2019-10-14 21:41:22,696 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:22,696 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696552342] [2019-10-14 21:41:22,696 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:22,697 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:22,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-10-14 21:41:23,181 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696552342] [2019-10-14 21:41:23,181 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391207829] [2019-10-14 21:41:23,181 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:25,118 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-14 21:41:25,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:25,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:41:25,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 953 trivial. 0 not checked. [2019-10-14 21:41:25,280 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:25,280 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 11] total 38 [2019-10-14 21:41:25,280 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215207767] [2019-10-14 21:41:25,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-14 21:41:25,281 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:25,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-14 21:41:25,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=972, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 21:41:25,282 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 38 states. [2019-10-14 21:41:25,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:25,802 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2019-10-14 21:41:25,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-14 21:41:25,803 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 144 [2019-10-14 21:41:25,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:25,804 INFO L225 Difference]: With dead ends: 155 [2019-10-14 21:41:25,804 INFO L226 Difference]: Without dead ends: 109 [2019-10-14 21:41:25,805 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=542, Invalid=1620, Unknown=0, NotChecked=0, Total=2162 [2019-10-14 21:41:25,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-10-14 21:41:25,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2019-10-14 21:41:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-14 21:41:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2019-10-14 21:41:25,811 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 144 [2019-10-14 21:41:25,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:25,811 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2019-10-14 21:41:25,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-14 21:41:25,811 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2019-10-14 21:41:25,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-14 21:41:25,813 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:25,813 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:26,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:26,020 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:26,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:26,021 INFO L82 PathProgramCache]: Analyzing trace with hash 859439231, now seen corresponding path program 25 times [2019-10-14 21:41:26,021 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:26,021 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843687389] [2019-10-14 21:41:26,022 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:26,022 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:26,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-10-14 21:41:26,567 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843687389] [2019-10-14 21:41:26,567 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505861618] [2019-10-14 21:41:26,568 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:26,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:26,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 21:41:26,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-10-14 21:41:26,707 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:26,707 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-14 21:41:26,708 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748104543] [2019-10-14 21:41:26,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 21:41:26,708 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:26,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 21:41:26,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:41:26,709 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 31 states. [2019-10-14 21:41:26,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:26,950 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-10-14 21:41:26,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 21:41:26,951 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 152 [2019-10-14 21:41:26,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:26,952 INFO L225 Difference]: With dead ends: 158 [2019-10-14 21:41:26,953 INFO L226 Difference]: Without dead ends: 110 [2019-10-14 21:41:26,954 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:41:26,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-14 21:41:26,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-10-14 21:41:26,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-14 21:41:26,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-10-14 21:41:26,959 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 152 [2019-10-14 21:41:26,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:26,960 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-10-14 21:41:26,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 21:41:26,960 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-10-14 21:41:26,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-14 21:41:26,961 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:26,961 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:27,164 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:27,165 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:27,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:27,166 INFO L82 PathProgramCache]: Analyzing trace with hash -698384671, now seen corresponding path program 26 times [2019-10-14 21:41:27,166 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:27,166 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500105052] [2019-10-14 21:41:27,166 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:27,166 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:27,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-10-14 21:41:27,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500105052] [2019-10-14 21:41:27,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656661301] [2019-10-14 21:41:27,753 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:27,863 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:27,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:27,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 21:41:27,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-10-14 21:41:27,911 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:27,911 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2019-10-14 21:41:27,912 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895091593] [2019-10-14 21:41:27,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 21:41:27,913 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:27,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 21:41:27,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:41:27,914 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 32 states. [2019-10-14 21:41:28,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:28,182 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2019-10-14 21:41:28,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 21:41:28,183 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 154 [2019-10-14 21:41:28,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:28,184 INFO L225 Difference]: With dead ends: 160 [2019-10-14 21:41:28,184 INFO L226 Difference]: Without dead ends: 112 [2019-10-14 21:41:28,186 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:41:28,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-10-14 21:41:28,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2019-10-14 21:41:28,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-14 21:41:28,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2019-10-14 21:41:28,191 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 154 [2019-10-14 21:41:28,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:28,191 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2019-10-14 21:41:28,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 21:41:28,191 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2019-10-14 21:41:28,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-14 21:41:28,192 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:28,193 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:28,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:28,397 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:28,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:28,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1176431811, now seen corresponding path program 27 times [2019-10-14 21:41:28,398 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:28,398 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098294937] [2019-10-14 21:41:28,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:28,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:28,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1631 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-10-14 21:41:28,840 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098294937] [2019-10-14 21:41:28,840 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39924836] [2019-10-14 21:41:28,840 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:29,036 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-14 21:41:29,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:29,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:41:29,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1631 backedges. 370 proven. 49 refuted. 0 times theorem prover too weak. 1212 trivial. 0 not checked. [2019-10-14 21:41:29,180 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:29,181 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 10] total 40 [2019-10-14 21:41:29,181 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3924468] [2019-10-14 21:41:29,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-14 21:41:29,181 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:29,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-14 21:41:29,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=1049, Unknown=0, NotChecked=0, Total=1560 [2019-10-14 21:41:29,183 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand 40 states. [2019-10-14 21:41:29,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:29,561 INFO L93 Difference]: Finished difference Result 165 states and 174 transitions. [2019-10-14 21:41:29,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-14 21:41:29,562 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 156 [2019-10-14 21:41:29,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:29,563 INFO L225 Difference]: With dead ends: 165 [2019-10-14 21:41:29,563 INFO L226 Difference]: Without dead ends: 117 [2019-10-14 21:41:29,564 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=511, Invalid=1049, Unknown=0, NotChecked=0, Total=1560 [2019-10-14 21:41:29,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-14 21:41:29,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2019-10-14 21:41:29,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-10-14 21:41:29,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2019-10-14 21:41:29,569 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 156 [2019-10-14 21:41:29,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:29,569 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2019-10-14 21:41:29,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-14 21:41:29,569 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2019-10-14 21:41:29,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-14 21:41:29,570 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:29,570 INFO L380 BasicCegarLoop]: trace histogram [29, 29, 27, 27, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:29,775 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:29,775 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:29,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:29,775 INFO L82 PathProgramCache]: Analyzing trace with hash 402103075, now seen corresponding path program 28 times [2019-10-14 21:41:29,775 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:29,775 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823796576] [2019-10-14 21:41:29,776 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:29,776 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:29,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2019-10-14 21:41:30,284 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823796576] [2019-10-14 21:41:30,284 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010339832] [2019-10-14 21:41:30,284 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:30,405 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:41:30,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:30,406 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:41:30,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:30,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 368 proven. 81 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2019-10-14 21:41:30,636 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:30,636 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 12] total 43 [2019-10-14 21:41:30,636 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375499424] [2019-10-14 21:41:30,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-10-14 21:41:30,637 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:30,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-10-14 21:41:30,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=1243, Unknown=0, NotChecked=0, Total=1806 [2019-10-14 21:41:30,638 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand 43 states. [2019-10-14 21:41:31,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:31,137 INFO L93 Difference]: Finished difference Result 171 states and 183 transitions. [2019-10-14 21:41:31,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-10-14 21:41:31,138 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 160 [2019-10-14 21:41:31,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:31,139 INFO L225 Difference]: With dead ends: 171 [2019-10-14 21:41:31,139 INFO L226 Difference]: Without dead ends: 121 [2019-10-14 21:41:31,140 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=693, Invalid=2063, Unknown=0, NotChecked=0, Total=2756 [2019-10-14 21:41:31,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-10-14 21:41:31,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2019-10-14 21:41:31,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-10-14 21:41:31,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2019-10-14 21:41:31,145 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 160 [2019-10-14 21:41:31,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:31,145 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2019-10-14 21:41:31,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-10-14 21:41:31,146 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2019-10-14 21:41:31,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-14 21:41:31,146 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:31,146 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:31,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:31,347 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:31,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:31,347 INFO L82 PathProgramCache]: Analyzing trace with hash -595520541, now seen corresponding path program 29 times [2019-10-14 21:41:31,348 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:31,348 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187976975] [2019-10-14 21:41:31,348 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:31,348 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:31,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:31,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:31,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:31,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2019-10-14 21:41:31,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187976975] [2019-10-14 21:41:31,817 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570227105] [2019-10-14 21:41:31,817 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true