/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/bor2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:35:32,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:35:32,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:35:32,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:35:32,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:35:32,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:35:32,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:35:32,293 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:35:32,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:35:32,299 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:35:32,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:35:32,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:35:32,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:35:32,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:35:32,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:35:32,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:35:32,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:35:32,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:35:32,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:35:32,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:35:32,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:35:32,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:35:32,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:35:32,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:35:32,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:35:32,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:35:32,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:35:32,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:35:32,350 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:35:32,385 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:35:32,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:35:32,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:35:32,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:35:32,390 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:35:32,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:35:32,391 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:35:32,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:35:32,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:35:32,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:35:32,391 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:35:32,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:35:32,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:35:32,392 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:35:32,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:35:32,392 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:35:32,392 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:35:32,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:35:32,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:35:32,396 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:35:32,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:35:32,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:35:32,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:35:32,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:35:32,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:35:32,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:35:32,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:35:32,400 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:35:32,400 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:35:32,698 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:35:32,712 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:35:32,715 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:35:32,717 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:35:32,717 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:35:32,718 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bor2.i [2019-11-06 18:35:32,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b55f5a74b/6358121f7ed94b3eaa69dc36485acac4/FLAG3222dc5ea [2019-11-06 18:35:33,229 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:35:33,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bor2.i [2019-11-06 18:35:33,238 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b55f5a74b/6358121f7ed94b3eaa69dc36485acac4/FLAG3222dc5ea [2019-11-06 18:35:33,634 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b55f5a74b/6358121f7ed94b3eaa69dc36485acac4 [2019-11-06 18:35:33,648 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:35:33,649 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:35:33,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:35:33,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:35:33,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:35:33,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:35:33" (1/1) ... [2019-11-06 18:35:33,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@87f41dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:33, skipping insertion in model container [2019-11-06 18:35:33,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:35:33" (1/1) ... [2019-11-06 18:35:33,666 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:35:33,684 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:35:33,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:35:33,903 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:35:33,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:35:34,031 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:35:34,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34 WrapperNode [2019-11-06 18:35:34,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:35:34,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:35:34,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:35:34,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:35:34,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (1/1) ... [2019-11-06 18:35:34,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (1/1) ... [2019-11-06 18:35:34,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (1/1) ... [2019-11-06 18:35:34,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (1/1) ... [2019-11-06 18:35:34,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (1/1) ... [2019-11-06 18:35:34,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (1/1) ... [2019-11-06 18:35:34,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (1/1) ... [2019-11-06 18:35:34,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:35:34,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:35:34,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:35:34,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:35:34,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:35:34,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:35:34,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:35:34,140 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2019-11-06 18:35:34,140 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:35:34,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:35:34,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:35:34,141 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2019-11-06 18:35:34,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:35:34,141 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:35:34,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:35:34,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:35:34,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:35:34,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:35:34,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:35:34,411 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:35:34,411 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 18:35:34,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:35:34 BoogieIcfgContainer [2019-11-06 18:35:34,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:35:34,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:35:34,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:35:34,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:35:34,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:35:33" (1/3) ... [2019-11-06 18:35:34,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f9c0ebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:35:34, skipping insertion in model container [2019-11-06 18:35:34,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (2/3) ... [2019-11-06 18:35:34,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f9c0ebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:35:34, skipping insertion in model container [2019-11-06 18:35:34,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:35:34" (3/3) ... [2019-11-06 18:35:34,423 INFO L109 eAbstractionObserver]: Analyzing ICFG bor2.i [2019-11-06 18:35:34,434 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:35:34,444 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:35:34,472 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:35:34,512 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:35:34,512 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:35:34,512 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:35:34,512 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:35:34,513 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:35:34,513 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:35:34,513 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:35:34,513 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:35:34,534 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-11-06 18:35:34,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:35:34,542 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:34,543 INFO L410 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] [2019-11-06 18:35:34,545 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:34,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:34,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1283808693, now seen corresponding path program 1 times [2019-11-06 18:35:34,556 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:34,556 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967893389] [2019-11-06 18:35:34,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:34,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:35:34,799 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967893389] [2019-11-06 18:35:34,800 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:35:34,800 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:35:34,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875519357] [2019-11-06 18:35:34,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:35:34,810 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:34,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:35:34,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:35:34,828 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-11-06 18:35:34,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:34,952 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-11-06 18:35:34,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:35:34,954 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 18:35:34,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:34,964 INFO L225 Difference]: With dead ends: 54 [2019-11-06 18:35:34,964 INFO L226 Difference]: Without dead ends: 26 [2019-11-06 18:35:34,969 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:35:34,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-06 18:35:35,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-06 18:35:35,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 18:35:35,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-06 18:35:35,010 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-11-06 18:35:35,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:35,010 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-06 18:35:35,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:35:35,011 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-06 18:35:35,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:35:35,013 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:35,014 INFO L410 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] [2019-11-06 18:35:35,014 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:35,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:35,015 INFO L82 PathProgramCache]: Analyzing trace with hash 721846027, now seen corresponding path program 1 times [2019-11-06 18:35:35,015 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:35,015 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336321717] [2019-11-06 18:35:35,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:35:35,165 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336321717] [2019-11-06 18:35:35,165 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243617064] [2019-11-06 18:35:35,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:35:35,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:35,298 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:35:35,298 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:35:35,298 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 18:35:35,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160593193] [2019-11-06 18:35:35,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:35:35,301 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:35,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:35:35,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:35:35,302 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-11-06 18:35:35,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:35,319 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-11-06 18:35:35,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:35:35,319 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 18:35:35,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:35,321 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:35:35,321 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 18:35:35,322 INFO L630 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 [2019-11-06 18:35:35,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 18:35:35,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-06 18:35:35,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 18:35:35,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-06 18:35:35,330 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-11-06 18:35:35,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:35,330 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-06 18:35:35,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:35:35,330 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-06 18:35:35,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 18:35:35,332 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:35,332 INFO L410 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] [2019-11-06 18:35:35,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:35,536 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:35,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:35,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1487444845, now seen corresponding path program 1 times [2019-11-06 18:35:35,538 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:35,538 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906540617] [2019-11-06 18:35:35,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:35:35,644 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906540617] [2019-11-06 18:35:35,644 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342200714] [2019-11-06 18:35:35,645 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 [2019-11-06 18:35:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:35:35,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:35:35,717 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:35:35,717 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-11-06 18:35:35,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386220840] [2019-11-06 18:35:35,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:35:35,719 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:35,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:35:35,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:35:35,719 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-06 18:35:35,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:35,738 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-11-06 18:35:35,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:35:35,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-11-06 18:35:35,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:35,749 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:35:35,750 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 18:35:35,751 INFO L630 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 [2019-11-06 18:35:35,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 18:35:35,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-06 18:35:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:35:35,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-06 18:35:35,758 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-11-06 18:35:35,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:35,758 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-06 18:35:35,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:35:35,759 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-06 18:35:35,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 18:35:35,760 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:35,760 INFO L410 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] [2019-11-06 18:35:35,971 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:35,971 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:35,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:35,974 INFO L82 PathProgramCache]: Analyzing trace with hash 2063023467, now seen corresponding path program 1 times [2019-11-06 18:35:35,974 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:35,974 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714245532] [2019-11-06 18:35:35,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:35:36,099 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714245532] [2019-11-06 18:35:36,099 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309391177] [2019-11-06 18:35:36,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:35:36,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:36,194 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:35:36,195 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:35:36,195 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 18:35:36,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673553246] [2019-11-06 18:35:36,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:35:36,196 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:36,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:35:36,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:35:36,197 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-11-06 18:35:36,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:36,209 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-11-06 18:35:36,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:35:36,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-11-06 18:35:36,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:36,211 INFO L225 Difference]: With dead ends: 43 [2019-11-06 18:35:36,211 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 18:35:36,212 INFO L630 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 [2019-11-06 18:35:36,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 18:35:36,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-06 18:35:36,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:35:36,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-06 18:35:36,218 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-11-06 18:35:36,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:36,220 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-06 18:35:36,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:35:36,221 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-06 18:35:36,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 18:35:36,222 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:36,222 INFO L410 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] [2019-11-06 18:35:36,429 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:36,429 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:36,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:36,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1550668567, now seen corresponding path program 1 times [2019-11-06 18:35:36,430 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:36,430 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967946251] [2019-11-06 18:35:36,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:35:36,538 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967946251] [2019-11-06 18:35:36,538 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708704535] [2019-11-06 18:35:36,539 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 [2019-11-06 18:35:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:35:36,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-06 18:35:36,629 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:36,629 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-11-06 18:35:36,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254501201] [2019-11-06 18:35:36,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:35:36,630 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:36,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:35:36,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:35:36,633 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-11-06 18:35:36,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:36,767 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-11-06 18:35:36,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:35:36,771 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-11-06 18:35:36,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:36,772 INFO L225 Difference]: With dead ends: 55 [2019-11-06 18:35:36,772 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 18:35:36,773 INFO L630 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 [2019-11-06 18:35:36,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 18:35:36,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-06 18:35:36,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 18:35:36,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-06 18:35:36,780 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-11-06 18:35:36,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:36,780 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-06 18:35:36,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:35:36,780 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-06 18:35:36,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 18:35:36,782 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:36,782 INFO L410 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] [2019-11-06 18:35:36,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:36,995 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:36,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:36,995 INFO L82 PathProgramCache]: Analyzing trace with hash 948091209, now seen corresponding path program 2 times [2019-11-06 18:35:36,995 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:36,995 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560739270] [2019-11-06 18:35:36,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,085 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:35:37,086 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560739270] [2019-11-06 18:35:37,086 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766387116] [2019-11-06 18:35:37,086 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 [2019-11-06 18:35:37,151 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:35:37,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:37,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:35:37,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:35:37,185 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:37,185 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:35:37,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814314903] [2019-11-06 18:35:37,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:35:37,187 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:37,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:35:37,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:35:37,187 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-11-06 18:35:37,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:37,274 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-11-06 18:35:37,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:35:37,275 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-11-06 18:35:37,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:37,275 INFO L225 Difference]: With dead ends: 58 [2019-11-06 18:35:37,276 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 18:35:37,276 INFO L630 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 [2019-11-06 18:35:37,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 18:35:37,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-06 18:35:37,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 18:35:37,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-11-06 18:35:37,283 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-11-06 18:35:37,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:37,283 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-11-06 18:35:37,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:35:37,284 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-11-06 18:35:37,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 18:35:37,285 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:37,285 INFO L410 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] [2019-11-06 18:35:37,486 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:37,486 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:37,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:37,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1603223851, now seen corresponding path program 3 times [2019-11-06 18:35:37,487 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:37,487 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709337703] [2019-11-06 18:35:37,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,607 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:35:37,608 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709337703] [2019-11-06 18:35:37,608 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223733308] [2019-11-06 18:35:37,608 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 [2019-11-06 18:35:37,676 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:35:37,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:37,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:35:37,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-06 18:35:37,709 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:37,710 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-06 18:35:37,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989558068] [2019-11-06 18:35:37,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:35:37,713 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:37,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:35:37,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:35:37,714 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-11-06 18:35:37,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:37,839 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-11-06 18:35:37,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:35:37,839 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-11-06 18:35:37,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:37,840 INFO L225 Difference]: With dead ends: 63 [2019-11-06 18:35:37,840 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 18:35:37,843 INFO L630 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 [2019-11-06 18:35:37,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 18:35:37,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-06 18:35:37,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 18:35:37,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-11-06 18:35:37,853 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-11-06 18:35:37,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:37,853 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-11-06 18:35:37,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:35:37,854 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-11-06 18:35:37,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 18:35:37,855 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:37,855 INFO L410 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] [2019-11-06 18:35:38,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:38,057 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:38,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:38,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1402505333, now seen corresponding path program 4 times [2019-11-06 18:35:38,057 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:38,058 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580499826] [2019-11-06 18:35:38,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:35:38,153 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580499826] [2019-11-06 18:35:38,153 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997395713] [2019-11-06 18:35:38,153 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:38,207 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:35:38,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:38,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:35:38,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:35:38,238 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:38,239 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:35:38,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274457920] [2019-11-06 18:35:38,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:35:38,240 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:38,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:35:38,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:35:38,240 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-11-06 18:35:38,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:38,347 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-11-06 18:35:38,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:35:38,348 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-11-06 18:35:38,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:38,348 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:35:38,349 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 18:35:38,349 INFO L630 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 [2019-11-06 18:35:38,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 18:35:38,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-06 18:35:38,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:35:38,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-11-06 18:35:38,354 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 56 [2019-11-06 18:35:38,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:38,355 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-11-06 18:35:38,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:35:38,355 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-11-06 18:35:38,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-06 18:35:38,356 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:38,356 INFO L410 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] [2019-11-06 18:35:38,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:38,557 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:38,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:38,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1995640301, now seen corresponding path program 5 times [2019-11-06 18:35:38,558 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:38,559 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014093625] [2019-11-06 18:35:38,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:35:38,684 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014093625] [2019-11-06 18:35:38,684 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439251248] [2019-11-06 18:35:38,684 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:38,769 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 18:35:38,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:38,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:35:38,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-06 18:35:38,824 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:38,824 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 18:35:38,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540433511] [2019-11-06 18:35:38,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:35:38,825 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:38,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:35:38,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:35:38,826 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2019-11-06 18:35:39,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:39,015 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-11-06 18:35:39,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:35:39,015 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-11-06 18:35:39,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:39,016 INFO L225 Difference]: With dead ends: 71 [2019-11-06 18:35:39,016 INFO L226 Difference]: Without dead ends: 47 [2019-11-06 18:35:39,017 INFO L630 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 [2019-11-06 18:35:39,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-06 18:35:39,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-11-06 18:35:39,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-06 18:35:39,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-11-06 18:35:39,027 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 58 [2019-11-06 18:35:39,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:39,028 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-11-06 18:35:39,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:35:39,031 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-11-06 18:35:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 18:35:39,032 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:39,032 INFO L410 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] [2019-11-06 18:35:39,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:39,233 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:39,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:39,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1611767219, now seen corresponding path program 6 times [2019-11-06 18:35:39,234 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:39,234 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921366016] [2019-11-06 18:35:39,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-11-06 18:35:39,340 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921366016] [2019-11-06 18:35:39,340 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911517396] [2019-11-06 18:35:39,340 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:39,408 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:35:39,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:39,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:35:39,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-11-06 18:35:39,462 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:39,462 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-11-06 18:35:39,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399904548] [2019-11-06 18:35:39,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:35:39,463 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:39,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:35:39,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:35:39,466 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-11-06 18:35:39,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:39,633 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-11-06 18:35:39,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:35:39,633 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-11-06 18:35:39,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:39,634 INFO L225 Difference]: With dead ends: 77 [2019-11-06 18:35:39,634 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 18:35:39,635 INFO L630 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 [2019-11-06 18:35:39,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 18:35:39,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-11-06 18:35:39,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:35:39,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-11-06 18:35:39,644 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 66 [2019-11-06 18:35:39,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:39,644 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-11-06 18:35:39,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:35:39,645 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-11-06 18:35:39,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-06 18:35:39,648 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:39,649 INFO L410 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] [2019-11-06 18:35:39,853 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:39,854 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:39,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:39,854 INFO L82 PathProgramCache]: Analyzing trace with hash -133387091, now seen corresponding path program 7 times [2019-11-06 18:35:39,855 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:39,855 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439446476] [2019-11-06 18:35:39,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:39,962 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439446476] [2019-11-06 18:35:39,962 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001310241] [2019-11-06 18:35:39,962 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:40,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:35:40,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:40,075 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:40,077 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:40,077 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:35:40,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231333974] [2019-11-06 18:35:40,078 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:35:40,078 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:40,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:35:40,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:35:40,079 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2019-11-06 18:35:40,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:40,150 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-11-06 18:35:40,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:35:40,150 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-11-06 18:35:40,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:40,151 INFO L225 Difference]: With dead ends: 80 [2019-11-06 18:35:40,152 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 18:35:40,152 INFO L630 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 [2019-11-06 18:35:40,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 18:35:40,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-11-06 18:35:40,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 18:35:40,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-11-06 18:35:40,158 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 74 [2019-11-06 18:35:40,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:40,158 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-11-06 18:35:40,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:35:40,158 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-11-06 18:35:40,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-06 18:35:40,159 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:40,159 INFO L410 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] [2019-11-06 18:35:40,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:40,368 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:40,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:40,369 INFO L82 PathProgramCache]: Analyzing trace with hash -430428529, now seen corresponding path program 8 times [2019-11-06 18:35:40,369 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:40,369 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193046361] [2019-11-06 18:35:40,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:40,501 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193046361] [2019-11-06 18:35:40,501 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485910567] [2019-11-06 18:35:40,501 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:40,587 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:35:40,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:40,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:35:40,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:40,629 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:40,629 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:35:40,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887371791] [2019-11-06 18:35:40,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:35:40,630 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:40,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:35:40,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:35:40,631 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2019-11-06 18:35:40,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:40,743 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2019-11-06 18:35:40,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:35:40,743 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-11-06 18:35:40,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:40,744 INFO L225 Difference]: With dead ends: 82 [2019-11-06 18:35:40,744 INFO L226 Difference]: Without dead ends: 54 [2019-11-06 18:35:40,745 INFO L630 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 [2019-11-06 18:35:40,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-06 18:35:40,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-06 18:35:40,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 18:35:40,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-11-06 18:35:40,750 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-11-06 18:35:40,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:40,751 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-11-06 18:35:40,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:35:40,751 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-11-06 18:35:40,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-06 18:35:40,752 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:40,752 INFO L410 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] [2019-11-06 18:35:40,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:40,953 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:40,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:40,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1875558385, now seen corresponding path program 9 times [2019-11-06 18:35:40,953 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:40,953 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000393833] [2019-11-06 18:35:40,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:40,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:41,095 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000393833] [2019-11-06 18:35:41,096 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616851747] [2019-11-06 18:35:41,096 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:41,155 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 18:35:41,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:41,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:35:41,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:41,209 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-11-06 18:35:41,209 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:41,210 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-11-06 18:35:41,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877125023] [2019-11-06 18:35:41,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:35:41,211 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:41,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:35:41,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:35:41,212 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2019-11-06 18:35:41,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:41,412 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-11-06 18:35:41,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 18:35:41,412 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-11-06 18:35:41,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:41,413 INFO L225 Difference]: With dead ends: 87 [2019-11-06 18:35:41,413 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:35:41,414 INFO L630 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 [2019-11-06 18:35:41,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:35:41,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-11-06 18:35:41,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 18:35:41,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2019-11-06 18:35:41,420 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 78 [2019-11-06 18:35:41,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:41,420 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2019-11-06 18:35:41,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:35:41,421 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2019-11-06 18:35:41,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-06 18:35:41,422 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:41,422 INFO L410 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] [2019-11-06 18:35:41,626 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:41,626 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:41,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:41,626 INFO L82 PathProgramCache]: Analyzing trace with hash 237602385, now seen corresponding path program 10 times [2019-11-06 18:35:41,627 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:41,627 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823269568] [2019-11-06 18:35:41,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-06 18:35:41,821 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823269568] [2019-11-06 18:35:41,822 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572884333] [2019-11-06 18:35:41,822 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 [2019-11-06 18:35:41,914 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:35:41,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:41,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:35:41,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-11-06 18:35:41,997 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:41,997 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-06 18:35:41,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083158210] [2019-11-06 18:35:41,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:35:41,999 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:41,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:35:41,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:35:41,999 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2019-11-06 18:35:42,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:42,247 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-11-06 18:35:42,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 18:35:42,248 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2019-11-06 18:35:42,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:42,249 INFO L225 Difference]: With dead ends: 93 [2019-11-06 18:35:42,249 INFO L226 Difference]: Without dead ends: 63 [2019-11-06 18:35:42,250 INFO L630 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 [2019-11-06 18:35:42,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-06 18:35:42,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-11-06 18:35:42,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 18:35:42,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-11-06 18:35:42,255 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2019-11-06 18:35:42,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:42,255 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-11-06 18:35:42,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:35:42,255 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-11-06 18:35:42,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-06 18:35:42,256 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:42,256 INFO L410 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] [2019-11-06 18:35:42,459 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:42,460 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:42,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:42,460 INFO L82 PathProgramCache]: Analyzing trace with hash 537663665, now seen corresponding path program 11 times [2019-11-06 18:35:42,460 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:42,461 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654479172] [2019-11-06 18:35:42,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-11-06 18:35:42,624 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654479172] [2019-11-06 18:35:42,625 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636123869] [2019-11-06 18:35:42,625 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 [2019-11-06 18:35:42,875 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-06 18:35:42,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:42,877 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:35:42,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-11-06 18:35:43,004 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:43,004 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-11-06 18:35:43,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449215495] [2019-11-06 18:35:43,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:35:43,006 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:43,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:35:43,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:35:43,006 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 21 states. [2019-11-06 18:35:43,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:43,246 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-11-06 18:35:43,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:35:43,247 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2019-11-06 18:35:43,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:43,248 INFO L225 Difference]: With dead ends: 99 [2019-11-06 18:35:43,248 INFO L226 Difference]: Without dead ends: 67 [2019-11-06 18:35:43,249 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:35:43,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-06 18:35:43,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-11-06 18:35:43,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-06 18:35:43,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-11-06 18:35:43,253 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 90 [2019-11-06 18:35:43,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:43,254 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-11-06 18:35:43,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:35:43,254 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-11-06 18:35:43,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 18:35:43,255 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:43,255 INFO L410 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] [2019-11-06 18:35:43,458 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:43,459 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:43,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:43,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1797792017, now seen corresponding path program 12 times [2019-11-06 18:35:43,460 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:43,460 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642353583] [2019-11-06 18:35:43,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-11-06 18:35:43,609 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642353583] [2019-11-06 18:35:43,610 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357473818] [2019-11-06 18:35:43,610 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 [2019-11-06 18:35:43,754 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-06 18:35:43,754 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:43,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:35:43,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 178 proven. 9 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2019-11-06 18:35:43,810 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:43,810 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-11-06 18:35:43,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819976747] [2019-11-06 18:35:43,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:35:43,810 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:43,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:35:43,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:35:43,811 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 20 states. [2019-11-06 18:35:43,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:43,985 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2019-11-06 18:35:43,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:35:43,985 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-11-06 18:35:43,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:43,986 INFO L225 Difference]: With dead ends: 105 [2019-11-06 18:35:43,986 INFO L226 Difference]: Without dead ends: 71 [2019-11-06 18:35:43,987 INFO L630 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 [2019-11-06 18:35:43,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-06 18:35:43,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-11-06 18:35:43,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-06 18:35:43,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-11-06 18:35:43,992 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 98 [2019-11-06 18:35:43,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:43,992 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-11-06 18:35:43,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:35:43,992 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-11-06 18:35:43,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-06 18:35:43,993 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:43,994 INFO L410 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] [2019-11-06 18:35:44,198 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:44,199 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:44,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:44,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1464793713, now seen corresponding path program 13 times [2019-11-06 18:35:44,200 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:44,200 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981883275] [2019-11-06 18:35:44,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:44,439 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981883275] [2019-11-06 18:35:44,440 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785383545] [2019-11-06 18:35:44,440 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 [2019-11-06 18:35:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:35:44,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:44,558 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:44,558 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 18:35:44,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115531451] [2019-11-06 18:35:44,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:35:44,560 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:44,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:35:44,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:35:44,561 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 18 states. [2019-11-06 18:35:44,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:44,701 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-11-06 18:35:44,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:35:44,702 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2019-11-06 18:35:44,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:44,703 INFO L225 Difference]: With dead ends: 108 [2019-11-06 18:35:44,703 INFO L226 Difference]: Without dead ends: 72 [2019-11-06 18:35:44,704 INFO L630 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 [2019-11-06 18:35:44,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-06 18:35:44,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-11-06 18:35:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-06 18:35:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-11-06 18:35:44,710 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 102 [2019-11-06 18:35:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:44,710 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-11-06 18:35:44,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:35:44,711 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-11-06 18:35:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-06 18:35:44,712 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:44,712 INFO L410 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] [2019-11-06 18:35:44,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:44,918 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:44,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:44,918 INFO L82 PathProgramCache]: Analyzing trace with hash -238635693, now seen corresponding path program 14 times [2019-11-06 18:35:44,919 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:44,919 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759381548] [2019-11-06 18:35:44,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:45,216 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759381548] [2019-11-06 18:35:45,216 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221043188] [2019-11-06 18:35:45,217 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 [2019-11-06 18:35:45,331 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:35:45,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:45,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:35:45,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:45,377 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:45,378 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 18:35:45,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961705533] [2019-11-06 18:35:45,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:35:45,379 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:45,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:35:45,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:35:45,380 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 19 states. [2019-11-06 18:35:45,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:45,537 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-06 18:35:45,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:35:45,538 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-11-06 18:35:45,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:45,539 INFO L225 Difference]: With dead ends: 110 [2019-11-06 18:35:45,539 INFO L226 Difference]: Without dead ends: 74 [2019-11-06 18:35:45,543 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:35:45,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-06 18:35:45,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-11-06 18:35:45,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-06 18:35:45,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-11-06 18:35:45,554 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 104 [2019-11-06 18:35:45,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:45,555 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-11-06 18:35:45,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:35:45,555 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-11-06 18:35:45,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-06 18:35:45,557 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:45,557 INFO L410 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] [2019-11-06 18:35:45,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:45,762 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:45,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:45,763 INFO L82 PathProgramCache]: Analyzing trace with hash -851755083, now seen corresponding path program 15 times [2019-11-06 18:35:45,763 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:45,763 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682791159] [2019-11-06 18:35:45,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,013 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:46,014 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682791159] [2019-11-06 18:35:46,014 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101032768] [2019-11-06 18:35:46,014 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 [2019-11-06 18:35:46,092 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:35:46,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:46,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:35:46,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-11-06 18:35:46,197 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:46,197 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-11-06 18:35:46,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766430307] [2019-11-06 18:35:46,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:35:46,199 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:46,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:35:46,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:35:46,200 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 24 states. [2019-11-06 18:35:46,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:46,400 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2019-11-06 18:35:46,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:35:46,400 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2019-11-06 18:35:46,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:46,401 INFO L225 Difference]: With dead ends: 115 [2019-11-06 18:35:46,401 INFO L226 Difference]: Without dead ends: 79 [2019-11-06 18:35:46,402 INFO L630 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 [2019-11-06 18:35:46,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-06 18:35:46,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-11-06 18:35:46,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-06 18:35:46,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-11-06 18:35:46,406 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 106 [2019-11-06 18:35:46,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:46,406 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-11-06 18:35:46,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 18:35:46,407 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-11-06 18:35:46,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-06 18:35:46,407 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:46,408 INFO L410 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] [2019-11-06 18:35:46,611 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:46,612 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:46,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:46,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1460436501, now seen corresponding path program 16 times [2019-11-06 18:35:46,613 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:46,613 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246175289] [2019-11-06 18:35:46,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:35:46,848 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246175289] [2019-11-06 18:35:46,849 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723967069] [2019-11-06 18:35:46,849 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 [2019-11-06 18:35:46,930 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:35:46,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:46,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:35:46,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:35:46,987 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:46,987 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-11-06 18:35:46,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875343446] [2019-11-06 18:35:46,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:35:46,988 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:46,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:35:46,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:35:46,989 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 21 states. [2019-11-06 18:35:47,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:47,182 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-11-06 18:35:47,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:35:47,182 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2019-11-06 18:35:47,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:47,183 INFO L225 Difference]: With dead ends: 118 [2019-11-06 18:35:47,183 INFO L226 Difference]: Without dead ends: 80 [2019-11-06 18:35:47,184 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:35:47,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-06 18:35:47,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-11-06 18:35:47,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-06 18:35:47,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-11-06 18:35:47,190 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 110 [2019-11-06 18:35:47,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:47,191 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-11-06 18:35:47,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:35:47,191 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-11-06 18:35:47,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-06 18:35:47,192 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:47,192 INFO L410 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] [2019-11-06 18:35:47,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:47,403 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:47,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:47,403 INFO L82 PathProgramCache]: Analyzing trace with hash 664024823, now seen corresponding path program 17 times [2019-11-06 18:35:47,403 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:47,404 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774749894] [2019-11-06 18:35:47,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:35:47,637 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774749894] [2019-11-06 18:35:47,637 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869957726] [2019-11-06 18:35:47,637 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 [2019-11-06 18:35:48,140 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-11-06 18:35:48,141 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:48,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:35:48,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-11-06 18:35:48,250 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:48,250 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-06 18:35:48,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395194171] [2019-11-06 18:35:48,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:35:48,251 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:48,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:35:48,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:35:48,252 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 28 states. [2019-11-06 18:35:48,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:48,617 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2019-11-06 18:35:48,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 18:35:48,618 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2019-11-06 18:35:48,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:48,618 INFO L225 Difference]: With dead ends: 123 [2019-11-06 18:35:48,618 INFO L226 Difference]: Without dead ends: 85 [2019-11-06 18:35:48,619 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:35:48,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-06 18:35:48,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-11-06 18:35:48,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-06 18:35:48,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-11-06 18:35:48,623 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 112 [2019-11-06 18:35:48,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:48,624 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-11-06 18:35:48,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:35:48,624 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-11-06 18:35:48,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-06 18:35:48,625 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:48,625 INFO L410 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] [2019-11-06 18:35:48,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:48,831 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:48,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:48,831 INFO L82 PathProgramCache]: Analyzing trace with hash -683189417, now seen corresponding path program 18 times [2019-11-06 18:35:48,831 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:48,831 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042224756] [2019-11-06 18:35:48,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:48,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-11-06 18:35:49,107 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042224756] [2019-11-06 18:35:49,107 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358903394] [2019-11-06 18:35:49,108 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 [2019-11-06 18:35:49,609 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-06 18:35:49,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:49,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:35:49,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 234 proven. 25 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-11-06 18:35:49,730 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:49,730 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2019-11-06 18:35:49,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43691831] [2019-11-06 18:35:49,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:35:49,731 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:49,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:35:49,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:35:49,732 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 28 states. [2019-11-06 18:35:49,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:49,991 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2019-11-06 18:35:49,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 18:35:49,994 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 120 [2019-11-06 18:35:49,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:49,995 INFO L225 Difference]: With dead ends: 129 [2019-11-06 18:35:49,995 INFO L226 Difference]: Without dead ends: 89 [2019-11-06 18:35:49,995 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:35:49,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-06 18:35:49,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2019-11-06 18:35:49,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-06 18:35:50,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2019-11-06 18:35:50,000 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 120 [2019-11-06 18:35:50,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:50,001 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2019-11-06 18:35:50,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:35:50,001 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2019-11-06 18:35:50,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 18:35:50,002 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:50,002 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 19, 19, 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] [2019-11-06 18:35:50,206 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:50,206 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:50,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:50,207 INFO L82 PathProgramCache]: Analyzing trace with hash 272373175, now seen corresponding path program 19 times [2019-11-06 18:35:50,207 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:50,207 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465345715] [2019-11-06 18:35:50,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:50,505 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465345715] [2019-11-06 18:35:50,505 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91444291] [2019-11-06 18:35:50,505 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 [2019-11-06 18:35:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:50,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 18:35:50,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:50,672 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:50,672 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-11-06 18:35:50,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848372163] [2019-11-06 18:35:50,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:35:50,673 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:50,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:35:50,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:35:50,674 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 24 states. [2019-11-06 18:35:50,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:50,825 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2019-11-06 18:35:50,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 18:35:50,825 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 124 [2019-11-06 18:35:50,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:50,826 INFO L225 Difference]: With dead ends: 132 [2019-11-06 18:35:50,827 INFO L226 Difference]: Without dead ends: 90 [2019-11-06 18:35:50,827 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:35:50,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-06 18:35:50,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-11-06 18:35:50,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-06 18:35:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-11-06 18:35:50,831 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 124 [2019-11-06 18:35:50,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:50,832 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-11-06 18:35:50,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 18:35:50,832 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-11-06 18:35:50,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-06 18:35:50,833 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:50,833 INFO L410 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] [2019-11-06 18:35:51,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:51,037 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:51,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:51,037 INFO L82 PathProgramCache]: Analyzing trace with hash -258630887, now seen corresponding path program 20 times [2019-11-06 18:35:51,038 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:51,038 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356773406] [2019-11-06 18:35:51,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:51,410 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356773406] [2019-11-06 18:35:51,410 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136305851] [2019-11-06 18:35:51,410 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 [2019-11-06 18:35:51,538 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:35:51,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:51,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 18:35:51,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:51,592 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:51,592 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-11-06 18:35:51,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026572749] [2019-11-06 18:35:51,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 18:35:51,593 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:51,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 18:35:51,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:35:51,594 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 25 states. [2019-11-06 18:35:51,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:51,774 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-11-06 18:35:51,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:35:51,775 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-11-06 18:35:51,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:51,776 INFO L225 Difference]: With dead ends: 134 [2019-11-06 18:35:51,776 INFO L226 Difference]: Without dead ends: 92 [2019-11-06 18:35:51,776 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:35:51,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-06 18:35:51,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-11-06 18:35:51,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-06 18:35:51,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-11-06 18:35:51,780 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 126 [2019-11-06 18:35:51,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:51,781 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-11-06 18:35:51,781 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-06 18:35:51,781 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-11-06 18:35:51,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-06 18:35:51,782 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:51,782 INFO L410 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] [2019-11-06 18:35:51,983 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:51,983 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:51,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:51,983 INFO L82 PathProgramCache]: Analyzing trace with hash 547573755, now seen corresponding path program 21 times [2019-11-06 18:35:51,983 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:51,984 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068700294] [2019-11-06 18:35:51,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:52,298 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068700294] [2019-11-06 18:35:52,298 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966766029] [2019-11-06 18:35:52,298 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 [2019-11-06 18:35:52,445 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-06 18:35:52,445 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:52,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:35:52,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 234 proven. 36 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2019-11-06 18:35:52,554 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:52,554 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2019-11-06 18:35:52,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530643637] [2019-11-06 18:35:52,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-06 18:35:52,555 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:52,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-06 18:35:52,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:35:52,556 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 32 states. [2019-11-06 18:35:52,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:52,868 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-11-06 18:35:52,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-06 18:35:52,869 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 128 [2019-11-06 18:35:52,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:52,869 INFO L225 Difference]: With dead ends: 139 [2019-11-06 18:35:52,869 INFO L226 Difference]: Without dead ends: 97 [2019-11-06 18:35:52,870 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:35:52,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-06 18:35:52,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-11-06 18:35:52,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-06 18:35:52,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2019-11-06 18:35:52,873 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 128 [2019-11-06 18:35:52,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:52,876 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2019-11-06 18:35:52,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-06 18:35:52,876 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2019-11-06 18:35:52,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 18:35:52,884 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:52,884 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 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] [2019-11-06 18:35:53,087 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:53,088 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:53,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:53,088 INFO L82 PathProgramCache]: Analyzing trace with hash -829264037, now seen corresponding path program 22 times [2019-11-06 18:35:53,088 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:53,088 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460470190] [2019-11-06 18:35:53,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:53,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:35:53,464 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460470190] [2019-11-06 18:35:53,464 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152467581] [2019-11-06 18:35:53,464 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 [2019-11-06 18:35:53,583 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:35:53,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:53,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 18:35:53,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:35:53,675 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:53,675 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-11-06 18:35:53,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285320883] [2019-11-06 18:35:53,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 18:35:53,676 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:53,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 18:35:53,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:35:53,677 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 27 states. [2019-11-06 18:35:53,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:53,960 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-11-06 18:35:53,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-06 18:35:53,961 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2019-11-06 18:35:53,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:53,963 INFO L225 Difference]: With dead ends: 142 [2019-11-06 18:35:53,963 INFO L226 Difference]: Without dead ends: 98 [2019-11-06 18:35:53,964 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:35:53,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-06 18:35:53,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-11-06 18:35:53,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-06 18:35:53,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-11-06 18:35:53,969 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 132 [2019-11-06 18:35:53,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:53,970 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-11-06 18:35:53,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 18:35:53,970 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-11-06 18:35:53,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 18:35:53,972 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:53,972 INFO L410 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] [2019-11-06 18:35:54,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:54,178 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:54,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:54,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1781960003, now seen corresponding path program 23 times [2019-11-06 18:35:54,179 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:54,180 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820626435] [2019-11-06 18:35:54,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:35:54,614 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820626435] [2019-11-06 18:35:54,615 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477377810] [2019-11-06 18:35:54,615 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 [2019-11-06 18:35:56,104 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-11-06 18:35:56,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:56,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:35:56,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 228 proven. 49 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2019-11-06 18:35:56,244 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:56,244 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2019-11-06 18:35:56,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706849425] [2019-11-06 18:35:56,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-06 18:35:56,245 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:56,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-06 18:35:56,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=819, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:35:56,246 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 35 states. [2019-11-06 18:35:56,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:56,737 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2019-11-06 18:35:56,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-06 18:35:56,737 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2019-11-06 18:35:56,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:56,738 INFO L225 Difference]: With dead ends: 147 [2019-11-06 18:35:56,738 INFO L226 Difference]: Without dead ends: 103 [2019-11-06 18:35:56,739 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=459, Invalid=1347, Unknown=0, NotChecked=0, Total=1806 [2019-11-06 18:35:56,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-06 18:35:56,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-11-06 18:35:56,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-06 18:35:56,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-11-06 18:35:56,748 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 134 [2019-11-06 18:35:56,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:56,749 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-11-06 18:35:56,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-06 18:35:56,749 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-11-06 18:35:56,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-06 18:35:56,750 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:56,750 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 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] [2019-11-06 18:35:56,957 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:56,957 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:56,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:56,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1049703197, now seen corresponding path program 24 times [2019-11-06 18:35:56,957 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:56,958 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081317353] [2019-11-06 18:35:56,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:57,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:57,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-11-06 18:35:57,313 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081317353] [2019-11-06 18:35:57,313 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596118685] [2019-11-06 18:35:57,313 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 [2019-11-06 18:36:00,148 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-06 18:36:00,148 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:00,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:36:00,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 298 proven. 49 refuted. 0 times theorem prover too weak. 917 trivial. 0 not checked. [2019-11-06 18:36:00,302 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:00,302 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-11-06 18:36:00,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866705391] [2019-11-06 18:36:00,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-06 18:36:00,303 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:00,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-06 18:36:00,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:36:00,304 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 36 states. [2019-11-06 18:36:00,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:00,612 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2019-11-06 18:36:00,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-06 18:36:00,613 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 142 [2019-11-06 18:36:00,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:00,614 INFO L225 Difference]: With dead ends: 153 [2019-11-06 18:36:00,614 INFO L226 Difference]: Without dead ends: 107 [2019-11-06 18:36:00,615 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:36:00,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-06 18:36:00,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2019-11-06 18:36:00,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-06 18:36:00,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2019-11-06 18:36:00,619 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 142 [2019-11-06 18:36:00,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:00,621 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2019-11-06 18:36:00,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-06 18:36:00,621 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2019-11-06 18:36:00,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-06 18:36:00,624 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:00,624 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 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] [2019-11-06 18:36:00,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:00,826 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:00,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:00,827 INFO L82 PathProgramCache]: Analyzing trace with hash -932737411, now seen corresponding path program 25 times [2019-11-06 18:36:00,827 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:00,828 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742573490] [2019-11-06 18:36:00,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:01,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:01,248 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742573490] [2019-11-06 18:36:01,248 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072024466] [2019-11-06 18:36:01,249 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 [2019-11-06 18:36:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:01,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-06 18:36:01,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:01,409 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:01,409 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-11-06 18:36:01,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438390464] [2019-11-06 18:36:01,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-06 18:36:01,410 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:01,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-06 18:36:01,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:36:01,410 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 30 states. [2019-11-06 18:36:01,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:01,644 INFO L93 Difference]: Finished difference Result 156 states and 164 transitions. [2019-11-06 18:36:01,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-06 18:36:01,645 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 146 [2019-11-06 18:36:01,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:01,646 INFO L225 Difference]: With dead ends: 156 [2019-11-06 18:36:01,646 INFO L226 Difference]: Without dead ends: 108 [2019-11-06 18:36:01,647 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:36:01,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-06 18:36:01,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-11-06 18:36:01,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-06 18:36:01,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2019-11-06 18:36:01,653 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 146 [2019-11-06 18:36:01,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:01,653 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2019-11-06 18:36:01,653 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-06 18:36:01,653 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2019-11-06 18:36:01,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-06 18:36:01,654 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:01,655 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 24, 24, 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] [2019-11-06 18:36:01,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:01,858 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:01,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:01,859 INFO L82 PathProgramCache]: Analyzing trace with hash 463208031, now seen corresponding path program 26 times [2019-11-06 18:36:01,859 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:01,859 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345455336] [2019-11-06 18:36:01,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:02,433 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345455336] [2019-11-06 18:36:02,434 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329159460] [2019-11-06 18:36:02,434 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 [2019-11-06 18:36:02,633 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:36:02,633 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:02,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-06 18:36:02,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:02,715 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:02,715 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-11-06 18:36:02,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201264909] [2019-11-06 18:36:02,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-06 18:36:02,719 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:02,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-06 18:36:02,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:36:02,720 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 31 states. [2019-11-06 18:36:02,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:02,919 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-11-06 18:36:02,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-06 18:36:02,919 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 148 [2019-11-06 18:36:02,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:02,921 INFO L225 Difference]: With dead ends: 158 [2019-11-06 18:36:02,921 INFO L226 Difference]: Without dead ends: 110 [2019-11-06 18:36:02,922 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:36:02,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-06 18:36:02,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-11-06 18:36:02,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-06 18:36:02,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-11-06 18:36:02,931 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 148 [2019-11-06 18:36:02,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:02,932 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-11-06 18:36:02,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-06 18:36:02,932 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-11-06 18:36:02,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-06 18:36:02,934 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:02,934 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 24, 24, 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] [2019-11-06 18:36:03,139 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:03,139 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:03,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:03,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1936981441, now seen corresponding path program 27 times [2019-11-06 18:36:03,140 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:03,140 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618543144] [2019-11-06 18:36:03,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:03,806 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618543144] [2019-11-06 18:36:03,806 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735053929] [2019-11-06 18:36:03,806 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 [2019-11-06 18:36:04,117 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-06 18:36:04,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:04,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:36:04,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2019-11-06 18:36:04,291 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:04,291 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2019-11-06 18:36:04,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663986670] [2019-11-06 18:36:04,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-06 18:36:04,292 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:04,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-06 18:36:04,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1069, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 18:36:04,293 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 40 states. [2019-11-06 18:36:04,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:04,853 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2019-11-06 18:36:04,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-06 18:36:04,854 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 150 [2019-11-06 18:36:04,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:04,855 INFO L225 Difference]: With dead ends: 163 [2019-11-06 18:36:04,855 INFO L226 Difference]: Without dead ends: 115 [2019-11-06 18:36:04,856 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=599, Invalid=1753, Unknown=0, NotChecked=0, Total=2352 [2019-11-06 18:36:04,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-06 18:36:04,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2019-11-06 18:36:04,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-06 18:36:04,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2019-11-06 18:36:04,868 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 150 [2019-11-06 18:36:04,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:04,869 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2019-11-06 18:36:04,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-06 18:36:04,869 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2019-11-06 18:36:04,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-06 18:36:04,870 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:04,870 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 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] [2019-11-06 18:36:05,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:05,071 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:05,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:05,071 INFO L82 PathProgramCache]: Analyzing trace with hash 495191585, now seen corresponding path program 28 times [2019-11-06 18:36:05,071 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:05,072 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727361658] [2019-11-06 18:36:05,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:05,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2019-11-06 18:36:05,694 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727361658] [2019-11-06 18:36:05,694 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473165290] [2019-11-06 18:36:05,694 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 [2019-11-06 18:36:05,800 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:36:05,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:05,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:36:05,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 368 proven. 81 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2019-11-06 18:36:06,044 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:06,044 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-11-06 18:36:06,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596254348] [2019-11-06 18:36:06,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-06 18:36:06,045 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:06,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-06 18:36:06,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1190, Unknown=0, NotChecked=0, Total=1722 [2019-11-06 18:36:06,047 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 42 states. [2019-11-06 18:36:06,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:06,538 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2019-11-06 18:36:06,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-06 18:36:06,538 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2019-11-06 18:36:06,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:06,539 INFO L225 Difference]: With dead ends: 169 [2019-11-06 18:36:06,540 INFO L226 Difference]: Without dead ends: 119 [2019-11-06 18:36:06,545 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2019-11-06 18:36:06,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-06 18:36:06,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2019-11-06 18:36:06,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-06 18:36:06,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2019-11-06 18:36:06,551 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 158 [2019-11-06 18:36:06,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:06,551 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2019-11-06 18:36:06,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-06 18:36:06,551 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2019-11-06 18:36:06,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-06 18:36:06,552 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:06,552 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 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] [2019-11-06 18:36:06,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:06,756 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:06,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:06,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1033632639, now seen corresponding path program 29 times [2019-11-06 18:36:06,757 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:06,757 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234043627] [2019-11-06 18:36:06,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:07,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:07,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1880 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2019-11-06 18:36:07,317 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234043627] [2019-11-06 18:36:07,318 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652810382] [2019-11-06 18:36:07,318 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