/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_password_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:46:12,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:46:12,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:46:12,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:46:12,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:46:12,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:46:12,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:46:12,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:46:12,614 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:46:12,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:46:12,621 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:46:12,623 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:46:12,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:46:12,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:46:12,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:46:12,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:46:12,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:46:12,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:46:12,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:46:12,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:46:12,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:46:12,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:46:12,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:46:12,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:46:12,653 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:46:12,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:46:12,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:46:12,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:46:12,673 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 18:46:12,694 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:46:12,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:46:12,697 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:46:12,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:46:12,697 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:46:12,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:46:12,698 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:46:12,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:46:12,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:46:12,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:46:12,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:46:12,700 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:46:12,700 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:46:12,700 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:46:12,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:46:12,701 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:46:12,701 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:46:12,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:46:12,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:46:12,701 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:46:12,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:46:12,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:46:12,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:46:12,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:46:12,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:46:12,703 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:46:12,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:46:12,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:46:12,703 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:46:13,008 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:46:13,026 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:46:13,030 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:46:13,031 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:46:13,032 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:46:13,032 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_password_ground.i [2019-11-06 18:46:13,114 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c95240084/62c33a9e482b42f2bdbac3532db5893a/FLAG824385997 [2019-11-06 18:46:13,581 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:46:13,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_password_ground.i [2019-11-06 18:46:13,588 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c95240084/62c33a9e482b42f2bdbac3532db5893a/FLAG824385997 [2019-11-06 18:46:13,947 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c95240084/62c33a9e482b42f2bdbac3532db5893a [2019-11-06 18:46:13,955 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:46:13,956 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:46:13,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:46:13,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:46:13,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:46:13,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:46:13" (1/1) ... [2019-11-06 18:46:13,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a38f3bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:13, skipping insertion in model container [2019-11-06 18:46:13,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:46:13" (1/1) ... [2019-11-06 18:46:13,975 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:46:13,992 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:46:14,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:46:14,196 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:46:14,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:46:14,237 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:46:14,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:14 WrapperNode [2019-11-06 18:46:14,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:46:14,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:46:14,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:46:14,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:46:14,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:14" (1/1) ... [2019-11-06 18:46:14,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:14" (1/1) ... [2019-11-06 18:46:14,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:14" (1/1) ... [2019-11-06 18:46:14,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:14" (1/1) ... [2019-11-06 18:46:14,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:14" (1/1) ... [2019-11-06 18:46:14,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:14" (1/1) ... [2019-11-06 18:46:14,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:14" (1/1) ... [2019-11-06 18:46:14,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:46:14,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:46:14,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:46:14,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:46:14,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:14" (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 18:46:14,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:46:14,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:46:14,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:46:14,422 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:46:14,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:46:14,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:46:14,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:46:14,422 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:46:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:46:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:46:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:46:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:46:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:46:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:46:14,664 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:46:14,664 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 18:46:14,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:46:14 BoogieIcfgContainer [2019-11-06 18:46:14,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:46:14,667 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:46:14,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:46:14,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:46:14,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:46:13" (1/3) ... [2019-11-06 18:46:14,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d2c84fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:46:14, skipping insertion in model container [2019-11-06 18:46:14,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:14" (2/3) ... [2019-11-06 18:46:14,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d2c84fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:46:14, skipping insertion in model container [2019-11-06 18:46:14,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:46:14" (3/3) ... [2019-11-06 18:46:14,674 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_password_ground.i [2019-11-06 18:46:14,684 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:46:14,692 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:46:14,713 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:46:14,760 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:46:14,760 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:46:14,760 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:46:14,761 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:46:14,761 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:46:14,761 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:46:14,761 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:46:14,761 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:46:14,781 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-06 18:46:14,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:46:14,787 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:14,788 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:14,790 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:14,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:14,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1554617121, now seen corresponding path program 1 times [2019-11-06 18:46:14,805 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:14,805 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239172176] [2019-11-06 18:46:14,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:14,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:46:14,965 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239172176] [2019-11-06 18:46:14,966 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:46:14,967 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:46:14,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469245426] [2019-11-06 18:46:14,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:46:14,974 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:14,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:46:14,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:46:14,991 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2019-11-06 18:46:15,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:15,114 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2019-11-06 18:46:15,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:46:15,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-06 18:46:15,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:15,124 INFO L225 Difference]: With dead ends: 48 [2019-11-06 18:46:15,125 INFO L226 Difference]: Without dead ends: 23 [2019-11-06 18:46:15,128 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:46:15,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-06 18:46:15,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-06 18:46:15,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-06 18:46:15,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2019-11-06 18:46:15,164 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2019-11-06 18:46:15,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:15,165 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2019-11-06 18:46:15,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:46:15,166 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2019-11-06 18:46:15,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:46:15,166 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:15,167 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:15,167 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:15,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:15,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1658163888, now seen corresponding path program 1 times [2019-11-06 18:46:15,169 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:15,169 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582864427] [2019-11-06 18:46:15,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:15,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:46:15,240 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582864427] [2019-11-06 18:46:15,240 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:46:15,240 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:46:15,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944975160] [2019-11-06 18:46:15,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:46:15,247 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:15,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:46:15,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:46:15,250 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2019-11-06 18:46:15,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:15,355 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-11-06 18:46:15,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:46:15,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-06 18:46:15,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:15,358 INFO L225 Difference]: With dead ends: 43 [2019-11-06 18:46:15,358 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 18:46:15,361 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:46:15,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 18:46:15,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2019-11-06 18:46:15,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-06 18:46:15,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-11-06 18:46:15,373 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 15 [2019-11-06 18:46:15,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:15,374 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-11-06 18:46:15,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:46:15,374 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-11-06 18:46:15,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:46:15,375 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:15,375 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:15,376 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:15,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:15,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1238952957, now seen corresponding path program 1 times [2019-11-06 18:46:15,378 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:15,378 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542522086] [2019-11-06 18:46:15,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:46:15,503 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542522086] [2019-11-06 18:46:15,504 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103806300] [2019-11-06 18:46:15,504 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 18:46:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:15,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:46:15,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:46:15,616 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:15,617 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:46:15,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567962303] [2019-11-06 18:46:15,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:46:15,618 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:15,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:46:15,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:46:15,619 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2019-11-06 18:46:15,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:15,743 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2019-11-06 18:46:15,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:46:15,744 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-11-06 18:46:15,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:15,745 INFO L225 Difference]: With dead ends: 49 [2019-11-06 18:46:15,746 INFO L226 Difference]: Without dead ends: 33 [2019-11-06 18:46:15,746 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:46:15,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-06 18:46:15,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-11-06 18:46:15,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-06 18:46:15,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-06 18:46:15,754 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2019-11-06 18:46:15,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:15,754 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-06 18:46:15,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:46:15,754 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-06 18:46:15,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 18:46:15,755 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:15,756 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:15,960 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:15,961 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:15,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:15,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1418090540, now seen corresponding path program 2 times [2019-11-06 18:46:15,963 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:15,963 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813298970] [2019-11-06 18:46:15,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:46:16,077 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813298970] [2019-11-06 18:46:16,077 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803110018] [2019-11-06 18:46:16,077 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:16,131 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:46:16,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:16,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:46:16,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:46:16,149 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:16,149 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:46:16,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939437828] [2019-11-06 18:46:16,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:46:16,150 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:16,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:46:16,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:46:16,151 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-11-06 18:46:16,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:16,265 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2019-11-06 18:46:16,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:46:16,266 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-11-06 18:46:16,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:16,267 INFO L225 Difference]: With dead ends: 57 [2019-11-06 18:46:16,267 INFO L226 Difference]: Without dead ends: 38 [2019-11-06 18:46:16,270 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 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 18:46:16,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-06 18:46:16,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2019-11-06 18:46:16,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 18:46:16,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-11-06 18:46:16,283 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 25 [2019-11-06 18:46:16,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:16,285 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-11-06 18:46:16,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:46:16,285 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-11-06 18:46:16,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 18:46:16,287 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:16,287 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:16,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:16,493 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:16,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:16,493 INFO L82 PathProgramCache]: Analyzing trace with hash 358687009, now seen corresponding path program 3 times [2019-11-06 18:46:16,493 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:16,493 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861178964] [2019-11-06 18:46:16,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:46:16,629 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861178964] [2019-11-06 18:46:16,629 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982508210] [2019-11-06 18:46:16,629 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:16,695 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:46:16,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:16,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-06 18:46:16,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:16,862 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:46:16,863 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2019-11-06 18:46:16,863 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:46:16,865 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:46:16,865 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:46:16,866 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:3 [2019-11-06 18:46:16,927 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 18:46:16,928 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:16,928 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2019-11-06 18:46:16,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151541402] [2019-11-06 18:46:16,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:46:16,929 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:16,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:46:16,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:46:16,930 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 15 states. [2019-11-06 18:46:17,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:17,476 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2019-11-06 18:46:17,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-06 18:46:17,477 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2019-11-06 18:46:17,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:17,480 INFO L225 Difference]: With dead ends: 91 [2019-11-06 18:46:17,481 INFO L226 Difference]: Without dead ends: 69 [2019-11-06 18:46:17,481 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:46:17,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-06 18:46:17,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2019-11-06 18:46:17,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-06 18:46:17,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2019-11-06 18:46:17,496 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 30 [2019-11-06 18:46:17,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:17,496 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2019-11-06 18:46:17,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:46:17,497 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2019-11-06 18:46:17,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 18:46:17,498 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:17,498 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:17,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:17,702 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:17,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:17,703 INFO L82 PathProgramCache]: Analyzing trace with hash 515609862, now seen corresponding path program 1 times [2019-11-06 18:46:17,703 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:17,703 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626040259] [2019-11-06 18:46:17,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-06 18:46:17,771 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626040259] [2019-11-06 18:46:17,772 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:46:17,775 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:46:17,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965376152] [2019-11-06 18:46:17,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:46:17,776 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:17,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:46:17,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:46:17,779 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 4 states. [2019-11-06 18:46:17,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:17,842 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2019-11-06 18:46:17,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:46:17,842 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2019-11-06 18:46:17,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:17,845 INFO L225 Difference]: With dead ends: 68 [2019-11-06 18:46:17,845 INFO L226 Difference]: Without dead ends: 46 [2019-11-06 18:46:17,846 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:46:17,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-06 18:46:17,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-11-06 18:46:17,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 18:46:17,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2019-11-06 18:46:17,853 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 35 [2019-11-06 18:46:17,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:17,854 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2019-11-06 18:46:17,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:46:17,854 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2019-11-06 18:46:17,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 18:46:17,855 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:17,855 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:17,856 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:17,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:17,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1119863012, now seen corresponding path program 1 times [2019-11-06 18:46:17,856 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:17,857 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216128600] [2019-11-06 18:46:17,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-06 18:46:17,944 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216128600] [2019-11-06 18:46:17,945 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70124819] [2019-11-06 18:46:17,945 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 18:46:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:18,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:46:18,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-06 18:46:18,044 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:18,044 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:46:18,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924005281] [2019-11-06 18:46:18,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:46:18,047 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:18,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:46:18,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:46:18,048 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 9 states. [2019-11-06 18:46:18,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:18,176 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2019-11-06 18:46:18,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:46:18,177 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2019-11-06 18:46:18,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:18,178 INFO L225 Difference]: With dead ends: 85 [2019-11-06 18:46:18,178 INFO L226 Difference]: Without dead ends: 54 [2019-11-06 18:46:18,179 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 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 18:46:18,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-06 18:46:18,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2019-11-06 18:46:18,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 18:46:18,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2019-11-06 18:46:18,192 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 43 [2019-11-06 18:46:18,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:18,194 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2019-11-06 18:46:18,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:46:18,194 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2019-11-06 18:46:18,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-06 18:46:18,197 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:18,197 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:18,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:18,399 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:18,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:18,399 INFO L82 PathProgramCache]: Analyzing trace with hash 875136345, now seen corresponding path program 2 times [2019-11-06 18:46:18,400 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:18,400 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993519224] [2019-11-06 18:46:18,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 18:46:18,557 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993519224] [2019-11-06 18:46:18,558 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838638550] [2019-11-06 18:46:18,558 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 18:46:18,614 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:46:18,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:18,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:46:18,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-11-06 18:46:18,643 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:18,643 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-06 18:46:18,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446088128] [2019-11-06 18:46:18,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:46:18,644 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:18,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:46:18,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:46:18,645 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 10 states. [2019-11-06 18:46:18,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:18,744 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2019-11-06 18:46:18,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:46:18,744 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2019-11-06 18:46:18,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:18,745 INFO L225 Difference]: With dead ends: 93 [2019-11-06 18:46:18,746 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:46:18,746 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:46:18,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:46:18,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2019-11-06 18:46:18,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-06 18:46:18,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2019-11-06 18:46:18,754 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 48 [2019-11-06 18:46:18,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:18,754 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2019-11-06 18:46:18,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:46:18,754 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2019-11-06 18:46:18,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-06 18:46:18,755 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:18,755 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:18,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:18,959 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:18,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:18,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1037062664, now seen corresponding path program 3 times [2019-11-06 18:46:18,961 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:18,961 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258261351] [2019-11-06 18:46:18,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-06 18:46:19,117 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258261351] [2019-11-06 18:46:19,117 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020767779] [2019-11-06 18:46:19,117 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 18:46:19,196 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:46:19,196 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:19,197 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-06 18:46:19,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:19,356 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:46:19,357 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2019-11-06 18:46:19,358 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:46:19,360 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:46:19,360 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:46:19,361 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:3 [2019-11-06 18:46:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-11-06 18:46:19,413 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:19,413 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2019-11-06 18:46:19,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517027975] [2019-11-06 18:46:19,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:46:19,414 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:19,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:46:19,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:46:19,415 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 20 states. [2019-11-06 18:46:20,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:20,148 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2019-11-06 18:46:20,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:46:20,149 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2019-11-06 18:46:20,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:20,150 INFO L225 Difference]: With dead ends: 111 [2019-11-06 18:46:20,150 INFO L226 Difference]: Without dead ends: 74 [2019-11-06 18:46:20,151 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=249, Invalid=1083, Unknown=0, NotChecked=0, Total=1332 [2019-11-06 18:46:20,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-06 18:46:20,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2019-11-06 18:46:20,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-06 18:46:20,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2019-11-06 18:46:20,160 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 53 [2019-11-06 18:46:20,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:20,160 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2019-11-06 18:46:20,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:46:20,161 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2019-11-06 18:46:20,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 18:46:20,161 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:20,162 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:20,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:20,368 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:20,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:20,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1707343249, now seen corresponding path program 4 times [2019-11-06 18:46:20,369 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:20,370 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550317655] [2019-11-06 18:46:20,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:20,514 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 4 proven. 70 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-11-06 18:46:20,515 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550317655] [2019-11-06 18:46:20,515 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892763871] [2019-11-06 18:46:20,515 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 18:46:20,577 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:46:20,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:20,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:46:20,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-11-06 18:46:20,601 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:20,601 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:46:20,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843129596] [2019-11-06 18:46:20,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:46:20,602 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:20,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:46:20,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:46:20,603 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 12 states. [2019-11-06 18:46:20,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:20,784 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2019-11-06 18:46:20,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:46:20,785 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2019-11-06 18:46:20,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:20,786 INFO L225 Difference]: With dead ends: 125 [2019-11-06 18:46:20,786 INFO L226 Difference]: Without dead ends: 77 [2019-11-06 18:46:20,787 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 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 18:46:20,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-06 18:46:20,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2019-11-06 18:46:20,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-06 18:46:20,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2019-11-06 18:46:20,796 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 66 [2019-11-06 18:46:20,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:20,797 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2019-11-06 18:46:20,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:46:20,797 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2019-11-06 18:46:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-06 18:46:20,798 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:20,798 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:21,002 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:21,003 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:21,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:21,003 INFO L82 PathProgramCache]: Analyzing trace with hash 130026728, now seen corresponding path program 5 times [2019-11-06 18:46:21,003 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:21,004 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083211680] [2019-11-06 18:46:21,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-11-06 18:46:21,185 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083211680] [2019-11-06 18:46:21,185 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063891518] [2019-11-06 18:46:21,186 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 18:46:21,822 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-11-06 18:46:21,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:21,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:46:21,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-06 18:46:21,849 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:21,850 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:46:21,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743881858] [2019-11-06 18:46:21,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:46:21,851 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:21,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:46:21,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:46:21,851 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 13 states. [2019-11-06 18:46:21,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:21,983 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2019-11-06 18:46:21,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:46:21,983 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2019-11-06 18:46:21,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:21,984 INFO L225 Difference]: With dead ends: 133 [2019-11-06 18:46:21,984 INFO L226 Difference]: Without dead ends: 82 [2019-11-06 18:46:21,985 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 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 18:46:21,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-06 18:46:21,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2019-11-06 18:46:21,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-06 18:46:21,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2019-11-06 18:46:21,995 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 71 [2019-11-06 18:46:21,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:21,996 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2019-11-06 18:46:21,996 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:46:21,996 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2019-11-06 18:46:21,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-06 18:46:21,997 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:21,997 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:22,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:22,203 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:22,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:22,204 INFO L82 PathProgramCache]: Analyzing trace with hash 556989109, now seen corresponding path program 6 times [2019-11-06 18:46:22,204 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:22,204 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90124713] [2019-11-06 18:46:22,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:22,338 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 4 proven. 117 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-11-06 18:46:22,338 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90124713] [2019-11-06 18:46:22,338 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407091778] [2019-11-06 18:46:22,338 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 18:46:22,625 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-11-06 18:46:22,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:22,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-06 18:46:22,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:22,888 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:46:22,889 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2019-11-06 18:46:22,891 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:46:22,892 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:46:22,893 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:46:22,893 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:3 [2019-11-06 18:46:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 4 proven. 68 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2019-11-06 18:46:22,967 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:22,967 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2019-11-06 18:46:22,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970719664] [2019-11-06 18:46:22,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 18:46:22,968 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:22,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 18:46:22,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:46:22,969 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 25 states. [2019-11-06 18:46:23,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:23,901 INFO L93 Difference]: Finished difference Result 151 states and 157 transitions. [2019-11-06 18:46:23,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-06 18:46:23,902 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 76 [2019-11-06 18:46:23,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:23,903 INFO L225 Difference]: With dead ends: 151 [2019-11-06 18:46:23,903 INFO L226 Difference]: Without dead ends: 97 [2019-11-06 18:46:23,904 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=399, Invalid=1763, Unknown=0, NotChecked=0, Total=2162 [2019-11-06 18:46:23,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-06 18:46:23,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2019-11-06 18:46:23,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-06 18:46:23,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2019-11-06 18:46:23,913 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 76 [2019-11-06 18:46:23,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:23,914 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2019-11-06 18:46:23,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-06 18:46:23,914 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2019-11-06 18:46:23,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-06 18:46:23,917 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:23,918 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:24,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:24,133 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:24,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:24,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1762177064, now seen corresponding path program 7 times [2019-11-06 18:46:24,133 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:24,134 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382307846] [2019-11-06 18:46:24,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:24,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 100 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2019-11-06 18:46:24,267 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382307846] [2019-11-06 18:46:24,267 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541435107] [2019-11-06 18:46:24,267 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 18:46:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:24,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:46:24,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:24,369 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2019-11-06 18:46:24,370 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:24,370 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-11-06 18:46:24,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980596861] [2019-11-06 18:46:24,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:46:24,371 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:24,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:46:24,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:46:24,373 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 15 states. [2019-11-06 18:46:24,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:24,503 INFO L93 Difference]: Finished difference Result 165 states and 170 transitions. [2019-11-06 18:46:24,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:46:24,503 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 89 [2019-11-06 18:46:24,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:24,505 INFO L225 Difference]: With dead ends: 165 [2019-11-06 18:46:24,505 INFO L226 Difference]: Without dead ends: 100 [2019-11-06 18:46:24,505 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:46:24,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-06 18:46:24,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2019-11-06 18:46:24,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-06 18:46:24,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2019-11-06 18:46:24,520 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 89 [2019-11-06 18:46:24,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:24,520 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2019-11-06 18:46:24,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:46:24,521 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2019-11-06 18:46:24,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-06 18:46:24,521 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:24,522 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:24,728 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:24,728 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:24,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:24,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1125903635, now seen corresponding path program 8 times [2019-11-06 18:46:24,729 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:24,729 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524418358] [2019-11-06 18:46:24,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 6 proven. 121 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2019-11-06 18:46:24,897 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524418358] [2019-11-06 18:46:24,897 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862124462] [2019-11-06 18:46:24,898 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 18:46:24,968 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:46:24,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:24,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:46:24,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2019-11-06 18:46:24,995 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:24,995 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-11-06 18:46:24,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939299690] [2019-11-06 18:46:24,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:46:24,996 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:24,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:46:24,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:46:24,997 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 16 states. [2019-11-06 18:46:25,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:25,159 INFO L93 Difference]: Finished difference Result 173 states and 178 transitions. [2019-11-06 18:46:25,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:46:25,160 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 94 [2019-11-06 18:46:25,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:25,161 INFO L225 Difference]: With dead ends: 173 [2019-11-06 18:46:25,161 INFO L226 Difference]: Without dead ends: 105 [2019-11-06 18:46:25,162 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:46:25,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-06 18:46:25,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2019-11-06 18:46:25,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-06 18:46:25,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2019-11-06 18:46:25,169 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 94 [2019-11-06 18:46:25,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:25,169 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2019-11-06 18:46:25,169 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:46:25,169 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2019-11-06 18:46:25,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-06 18:46:25,170 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:25,170 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:25,373 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:25,374 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:25,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:25,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1552689484, now seen corresponding path program 9 times [2019-11-06 18:46:25,374 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:25,374 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584731629] [2019-11-06 18:46:25,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:25,518 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 6 proven. 144 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2019-11-06 18:46:25,519 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584731629] [2019-11-06 18:46:25,519 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632982472] [2019-11-06 18:46:25,519 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 18:46:25,792 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-06 18:46:25,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:25,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-06 18:46:25,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:26,099 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:46:26,100 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2019-11-06 18:46:26,101 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:46:26,103 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:46:26,103 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:46:26,104 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:3 [2019-11-06 18:46:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 6 proven. 128 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-06 18:46:26,186 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:26,186 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2019-11-06 18:46:26,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845721178] [2019-11-06 18:46:26,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-06 18:46:26,187 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:26,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-06 18:46:26,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:46:26,188 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 30 states. [2019-11-06 18:46:27,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:27,567 INFO L93 Difference]: Finished difference Result 191 states and 197 transitions. [2019-11-06 18:46:27,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-06 18:46:27,568 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 99 [2019-11-06 18:46:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:27,569 INFO L225 Difference]: With dead ends: 191 [2019-11-06 18:46:27,569 INFO L226 Difference]: Without dead ends: 120 [2019-11-06 18:46:27,570 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=587, Invalid=2605, Unknown=0, NotChecked=0, Total=3192 [2019-11-06 18:46:27,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-11-06 18:46:27,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 115. [2019-11-06 18:46:27,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-11-06 18:46:27,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2019-11-06 18:46:27,577 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 99 [2019-11-06 18:46:27,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:27,578 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2019-11-06 18:46:27,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-06 18:46:27,578 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2019-11-06 18:46:27,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-06 18:46:27,579 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:27,579 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:27,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:27,784 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:27,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:27,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1018298587, now seen corresponding path program 10 times [2019-11-06 18:46:27,784 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:27,784 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491558846] [2019-11-06 18:46:27,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:27,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 8 proven. 169 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2019-11-06 18:46:27,973 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491558846] [2019-11-06 18:46:27,974 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997302315] [2019-11-06 18:46:27,974 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 18:46:28,078 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:46:28,078 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:28,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:46:28,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2019-11-06 18:46:28,100 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:28,100 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 18:46:28,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731388555] [2019-11-06 18:46:28,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:46:28,101 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:28,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:46:28,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:46:28,102 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 18 states. [2019-11-06 18:46:28,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:28,229 INFO L93 Difference]: Finished difference Result 205 states and 210 transitions. [2019-11-06 18:46:28,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:46:28,230 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 112 [2019-11-06 18:46:28,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:28,231 INFO L225 Difference]: With dead ends: 205 [2019-11-06 18:46:28,231 INFO L226 Difference]: Without dead ends: 123 [2019-11-06 18:46:28,232 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 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 18:46:28,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-06 18:46:28,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2019-11-06 18:46:28,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-11-06 18:46:28,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2019-11-06 18:46:28,239 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 112 [2019-11-06 18:46:28,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:28,240 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2019-11-06 18:46:28,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:46:28,240 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2019-11-06 18:46:28,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-06 18:46:28,243 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:28,243 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:28,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:28,447 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:28,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:28,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1682959964, now seen corresponding path program 11 times [2019-11-06 18:46:28,448 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:28,448 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11099567] [2019-11-06 18:46:28,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 8 proven. 196 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2019-11-06 18:46:28,666 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11099567] [2019-11-06 18:46:28,666 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823253124] [2019-11-06 18:46:28,667 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 18:46:33,533 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-11-06 18:46:33,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:33,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:46:33,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-11-06 18:46:33,570 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:33,570 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 18:46:33,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298392750] [2019-11-06 18:46:33,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:46:33,571 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:33,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:46:33,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:46:33,572 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 19 states. [2019-11-06 18:46:33,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:33,783 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2019-11-06 18:46:33,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:46:33,783 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 117 [2019-11-06 18:46:33,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:33,785 INFO L225 Difference]: With dead ends: 213 [2019-11-06 18:46:33,785 INFO L226 Difference]: Without dead ends: 128 [2019-11-06 18:46:33,786 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:46:33,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-06 18:46:33,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2019-11-06 18:46:33,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-11-06 18:46:33,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2019-11-06 18:46:33,795 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 117 [2019-11-06 18:46:33,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:33,795 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2019-11-06 18:46:33,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:46:33,795 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2019-11-06 18:46:33,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-06 18:46:33,797 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:33,797 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:34,001 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:34,001 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:34,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:34,002 INFO L82 PathProgramCache]: Analyzing trace with hash -876870583, now seen corresponding path program 12 times [2019-11-06 18:46:34,003 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:34,003 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530745396] [2019-11-06 18:46:34,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 8 proven. 330 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2019-11-06 18:46:34,246 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530745396] [2019-11-06 18:46:34,246 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304546475] [2019-11-06 18:46:34,246 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 18:46:34,756 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-11-06 18:46:34,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:34,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-06 18:46:34,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:35,120 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:46:35,121 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2019-11-06 18:46:35,121 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:46:35,129 INFO L567 ElimStorePlain]: treesize reduction 9, result has 25.0 percent of original size [2019-11-06 18:46:35,130 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:46:35,130 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:3 [2019-11-06 18:46:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 8 proven. 207 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2019-11-06 18:46:35,272 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:35,272 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2019-11-06 18:46:35,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064508442] [2019-11-06 18:46:35,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-06 18:46:35,274 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:35,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-06 18:46:35,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=926, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:46:35,275 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 35 states. [2019-11-06 18:46:37,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:37,074 INFO L93 Difference]: Finished difference Result 231 states and 237 transitions. [2019-11-06 18:46:37,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-06 18:46:37,074 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 122 [2019-11-06 18:46:37,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:37,075 INFO L225 Difference]: With dead ends: 231 [2019-11-06 18:46:37,075 INFO L226 Difference]: Without dead ends: 143 [2019-11-06 18:46:37,077 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 112 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=813, Invalid=3609, Unknown=0, NotChecked=0, Total=4422 [2019-11-06 18:46:37,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-11-06 18:46:37,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 138. [2019-11-06 18:46:37,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-06 18:46:37,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2019-11-06 18:46:37,084 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 122 [2019-11-06 18:46:37,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:37,084 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2019-11-06 18:46:37,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-06 18:46:37,084 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2019-11-06 18:46:37,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-06 18:46:37,085 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:37,085 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:37,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:37,286 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:37,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:37,287 INFO L82 PathProgramCache]: Analyzing trace with hash -33787756, now seen corresponding path program 13 times [2019-11-06 18:46:37,287 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:37,287 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746391405] [2019-11-06 18:46:37,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:37,515 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2019-11-06 18:46:37,515 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746391405] [2019-11-06 18:46:37,515 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721038263] [2019-11-06 18:46:37,515 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 18:46:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:37,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:46:37,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:37,669 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2019-11-06 18:46:37,669 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:37,670 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-11-06 18:46:37,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92623523] [2019-11-06 18:46:37,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:46:37,671 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:37,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:46:37,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:46:37,672 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 21 states. [2019-11-06 18:46:37,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:37,847 INFO L93 Difference]: Finished difference Result 245 states and 250 transitions. [2019-11-06 18:46:37,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:46:37,847 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 135 [2019-11-06 18:46:37,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:37,849 INFO L225 Difference]: With dead ends: 245 [2019-11-06 18:46:37,849 INFO L226 Difference]: Without dead ends: 146 [2019-11-06 18:46:37,849 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:46:37,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-11-06 18:46:37,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2019-11-06 18:46:37,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-11-06 18:46:37,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2019-11-06 18:46:37,860 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 135 [2019-11-06 18:46:37,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:37,860 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2019-11-06 18:46:37,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:46:37,860 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2019-11-06 18:46:37,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-06 18:46:37,861 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:37,861 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:38,066 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:38,066 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:38,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:38,067 INFO L82 PathProgramCache]: Analyzing trace with hash 578687105, now seen corresponding path program 14 times [2019-11-06 18:46:38,067 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:38,068 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896942390] [2019-11-06 18:46:38,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:38,312 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 10 proven. 425 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2019-11-06 18:46:38,313 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896942390] [2019-11-06 18:46:38,313 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002751802] [2019-11-06 18:46:38,313 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 18:46:38,432 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:46:38,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:38,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 18:46:38,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2019-11-06 18:46:38,470 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:38,470 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-11-06 18:46:38,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478202307] [2019-11-06 18:46:38,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 18:46:38,472 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:38,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 18:46:38,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:46:38,472 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 22 states. [2019-11-06 18:46:38,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:38,705 INFO L93 Difference]: Finished difference Result 253 states and 258 transitions. [2019-11-06 18:46:38,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:46:38,706 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 140 [2019-11-06 18:46:38,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:38,708 INFO L225 Difference]: With dead ends: 253 [2019-11-06 18:46:38,708 INFO L226 Difference]: Without dead ends: 151 [2019-11-06 18:46:38,709 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:46:38,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-11-06 18:46:38,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2019-11-06 18:46:38,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-06 18:46:38,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2019-11-06 18:46:38,723 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 140 [2019-11-06 18:46:38,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:38,724 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2019-11-06 18:46:38,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-06 18:46:38,724 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2019-11-06 18:46:38,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-06 18:46:38,727 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:38,727 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:38,932 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:38,933 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:38,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:38,934 INFO L82 PathProgramCache]: Analyzing trace with hash -529674384, now seen corresponding path program 15 times [2019-11-06 18:46:38,934 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:38,934 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297701415] [2019-11-06 18:46:38,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:39,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:39,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:39,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 10 proven. 477 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2019-11-06 18:46:39,409 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297701415] [2019-11-06 18:46:39,412 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321284057] [2019-11-06 18:46:39,412 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 18:46:41,126 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-11-06 18:46:41,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:41,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 47 conjunts are in the unsatisfiable core [2019-11-06 18:46:41,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:41,513 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:46:41,514 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2019-11-06 18:46:41,514 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:46:41,518 INFO L567 ElimStorePlain]: treesize reduction 9, result has 25.0 percent of original size [2019-11-06 18:46:41,518 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:46:41,519 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:3 [2019-11-06 18:46:41,686 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 10 proven. 305 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2019-11-06 18:46:41,687 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:41,687 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 40 [2019-11-06 18:46:41,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466104383] [2019-11-06 18:46:41,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-06 18:46:41,688 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:41,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-06 18:46:41,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=1205, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 18:46:41,689 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 40 states. [2019-11-06 18:46:43,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:43,786 INFO L93 Difference]: Finished difference Result 271 states and 277 transitions. [2019-11-06 18:46:43,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-06 18:46:43,787 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 145 [2019-11-06 18:46:43,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:43,789 INFO L225 Difference]: With dead ends: 271 [2019-11-06 18:46:43,789 INFO L226 Difference]: Without dead ends: 166 [2019-11-06 18:46:43,791 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 134 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1077, Invalid=4775, Unknown=0, NotChecked=0, Total=5852 [2019-11-06 18:46:43,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-11-06 18:46:43,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 161. [2019-11-06 18:46:43,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-11-06 18:46:43,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2019-11-06 18:46:43,799 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 145 [2019-11-06 18:46:43,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:43,799 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2019-11-06 18:46:43,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-06 18:46:43,800 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2019-11-06 18:46:43,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-06 18:46:43,801 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:43,801 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:44,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:44,008 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:44,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:44,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1725935801, now seen corresponding path program 16 times [2019-11-06 18:46:44,010 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:44,011 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154956003] [2019-11-06 18:46:44,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 12 proven. 361 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2019-11-06 18:46:44,311 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154956003] [2019-11-06 18:46:44,312 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69354865] [2019-11-06 18:46:44,312 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 18:46:44,441 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:46:44,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:44,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 18:46:44,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2019-11-06 18:46:44,472 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:44,472 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-11-06 18:46:44,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606637234] [2019-11-06 18:46:44,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:46:44,473 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:44,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:46:44,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:46:44,474 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 24 states. [2019-11-06 18:46:44,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:44,729 INFO L93 Difference]: Finished difference Result 285 states and 290 transitions. [2019-11-06 18:46:44,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 18:46:44,731 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 158 [2019-11-06 18:46:44,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:44,733 INFO L225 Difference]: With dead ends: 285 [2019-11-06 18:46:44,733 INFO L226 Difference]: Without dead ends: 169 [2019-11-06 18:46:44,734 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 171 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 18:46:44,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-11-06 18:46:44,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2019-11-06 18:46:44,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-11-06 18:46:44,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2019-11-06 18:46:44,743 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 158 [2019-11-06 18:46:44,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:44,743 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2019-11-06 18:46:44,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 18:46:44,743 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2019-11-06 18:46:44,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-06 18:46:44,745 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:44,745 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:44,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:44,949 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:44,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:44,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1783781792, now seen corresponding path program 17 times [2019-11-06 18:46:44,950 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:44,950 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188036538] [2019-11-06 18:46:44,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:45,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 12 proven. 400 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2019-11-06 18:46:45,317 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188036538] [2019-11-06 18:46:45,317 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123825874] [2019-11-06 18:46:45,317 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 18:46:57,224 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-11-06 18:46:57,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:57,238 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 18:46:57,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:57,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2019-11-06 18:46:57,294 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:57,294 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-11-06 18:46:57,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700994111] [2019-11-06 18:46:57,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 18:46:57,297 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:57,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 18:46:57,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:46:57,298 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 25 states. [2019-11-06 18:46:57,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:57,631 INFO L93 Difference]: Finished difference Result 293 states and 298 transitions. [2019-11-06 18:46:57,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:46:57,632 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 163 [2019-11-06 18:46:57,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:57,633 INFO L225 Difference]: With dead ends: 293 [2019-11-06 18:46:57,633 INFO L226 Difference]: Without dead ends: 174 [2019-11-06 18:46:57,635 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:46:57,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-11-06 18:46:57,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2019-11-06 18:46:57,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-11-06 18:46:57,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2019-11-06 18:46:57,653 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 163 [2019-11-06 18:46:57,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:57,654 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2019-11-06 18:46:57,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-06 18:46:57,654 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2019-11-06 18:46:57,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-06 18:46:57,655 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:57,658 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:57,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:57,860 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:57,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:57,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1151009315, now seen corresponding path program 18 times [2019-11-06 18:46:57,861 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:57,861 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899760672] [2019-11-06 18:46:57,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:58,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 12 proven. 441 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2019-11-06 18:46:58,269 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899760672] [2019-11-06 18:46:58,269 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139443626] [2019-11-06 18:46:58,269 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