/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_01.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:35:08,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:35:08,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:35:08,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:35:08,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:35:08,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:35:08,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:35:08,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:35:08,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:35:08,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:35:08,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:35:08,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:35:08,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:35:08,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:35:08,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:35:08,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:35:08,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:35:08,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:35:08,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:35:08,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:35:08,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:35:08,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:35:08,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:35:08,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:35:08,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:35:08,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:35:08,710 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:35:08,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:35:08,712 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:35:08,726 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:35:08,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:35:08,728 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:35:08,728 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:35:08,729 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:35:08,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:35:08,729 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:35:08,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:35:08,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:35:08,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:35:08,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:35:08,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:35:08,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:35:08,730 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:35:08,731 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:35:08,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:35:08,731 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:35:08,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:35:08,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:35:08,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:35:08,732 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:35:08,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:35:08,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:35:08,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:35:08,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:35:08,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:35:08,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:35:08,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:35:08,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:35:08,734 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:35:09,013 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:35:09,035 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:35:09,039 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:35:09,040 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:35:09,041 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:35:09,041 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_01.i [2019-11-23 20:35:09,109 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a36029dde/eef5f0aebde24e7aad56dfa33d8a0b75/FLAG5186ec90b [2019-11-23 20:35:09,546 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:35:09,547 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_01.i [2019-11-23 20:35:09,553 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a36029dde/eef5f0aebde24e7aad56dfa33d8a0b75/FLAG5186ec90b [2019-11-23 20:35:09,939 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a36029dde/eef5f0aebde24e7aad56dfa33d8a0b75 [2019-11-23 20:35:09,949 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:35:09,950 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:35:09,952 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:35:09,952 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:35:09,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:35:09,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:35:09" (1/1) ... [2019-11-23 20:35:09,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a08c9d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:09, skipping insertion in model container [2019-11-23 20:35:09,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:35:09" (1/1) ... [2019-11-23 20:35:09,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:35:09,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:35:10,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:35:10,228 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:35:10,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:35:10,282 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:35:10,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:10 WrapperNode [2019-11-23 20:35:10,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:35:10,283 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:35:10,284 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:35:10,284 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:35:10,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:10" (1/1) ... [2019-11-23 20:35:10,387 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:10" (1/1) ... [2019-11-23 20:35:10,413 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:35:10,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:35:10,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:35:10,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:35:10,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:10" (1/1) ... [2019-11-23 20:35:10,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:10" (1/1) ... [2019-11-23 20:35:10,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:10" (1/1) ... [2019-11-23 20:35:10,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:10" (1/1) ... [2019-11-23 20:35:10,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:10" (1/1) ... [2019-11-23 20:35:10,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:10" (1/1) ... [2019-11-23 20:35:10,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:10" (1/1) ... [2019-11-23 20:35:10,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:35:10,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:35:10,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:35:10,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:35:10,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:35:10,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:35:10,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:35:10,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:35:10,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:35:10,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:35:10,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:35:10,734 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:35:10,734 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:35:10,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:35:10 BoogieIcfgContainer [2019-11-23 20:35:10,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:35:10,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:35:10,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:35:10,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:35:10,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:35:09" (1/3) ... [2019-11-23 20:35:10,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f143499 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:35:10, skipping insertion in model container [2019-11-23 20:35:10,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:10" (2/3) ... [2019-11-23 20:35:10,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f143499 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:35:10, skipping insertion in model container [2019-11-23 20:35:10,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:35:10" (3/3) ... [2019-11-23 20:35:10,743 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_01.i [2019-11-23 20:35:10,753 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:35:10,760 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:35:10,784 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:35:10,832 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:35:10,832 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:35:10,833 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:35:10,833 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:35:10,833 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:35:10,833 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:35:10,833 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:35:10,834 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:35:10,849 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-23 20:35:10,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:35:10,875 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:10,876 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:10,876 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:10,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:10,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2019-11-23 20:35:10,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:10,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271462543] [2019-11-23 20:35:10,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:10,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:11,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271462543] [2019-11-23 20:35:11,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:35:11,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:35:11,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316947748] [2019-11-23 20:35:11,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:35:11,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:11,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:35:11,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:35:11,069 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2019-11-23 20:35:11,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:11,151 INFO L93 Difference]: Finished difference Result 34 states and 51 transitions. [2019-11-23 20:35:11,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:35:11,153 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 20:35:11,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:11,161 INFO L225 Difference]: With dead ends: 34 [2019-11-23 20:35:11,161 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 20:35:11,165 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:35:11,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 20:35:11,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2019-11-23 20:35:11,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 20:35:11,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-23 20:35:11,201 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-11-23 20:35:11,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:11,201 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-23 20:35:11,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:35:11,202 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-23 20:35:11,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:35:11,202 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:11,203 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:11,203 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:11,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:11,204 INFO L82 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2019-11-23 20:35:11,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:11,205 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227361354] [2019-11-23 20:35:11,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:11,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:35:11,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227361354] [2019-11-23 20:35:11,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264643504] [2019-11-23 20:35:11,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:11,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:11,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:35:11,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:11,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:35:11,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:11,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:35:11,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735210907] [2019-11-23 20:35:11,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:35:11,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:11,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:35:11,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:35:11,399 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 5 states. [2019-11-23 20:35:11,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:11,457 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2019-11-23 20:35:11,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:35:11,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-23 20:35:11,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:11,459 INFO L225 Difference]: With dead ends: 34 [2019-11-23 20:35:11,459 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:35:11,460 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:35:11,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:35:11,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 15. [2019-11-23 20:35:11,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 20:35:11,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-23 20:35:11,465 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2019-11-23 20:35:11,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:11,466 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-23 20:35:11,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:35:11,466 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-23 20:35:11,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:35:11,467 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:11,467 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:11,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:11,670 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:11,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:11,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1117999992, now seen corresponding path program 2 times [2019-11-23 20:35:11,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:11,673 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063828845] [2019-11-23 20:35:11,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:35:11,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063828845] [2019-11-23 20:35:11,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799222246] [2019-11-23 20:35:11,774 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:11,835 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:11,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:11,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:35:11,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:11,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:35:11,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:11,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:35:11,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687088664] [2019-11-23 20:35:11,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:35:11,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:11,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:35:11,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:35:11,858 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 6 states. [2019-11-23 20:35:11,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:11,929 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2019-11-23 20:35:11,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:35:11,930 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-23 20:35:11,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:11,931 INFO L225 Difference]: With dead ends: 42 [2019-11-23 20:35:11,931 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 20:35:11,932 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:35:11,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 20:35:11,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 17. [2019-11-23 20:35:11,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 20:35:11,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-23 20:35:11,937 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2019-11-23 20:35:11,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:11,938 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-23 20:35:11,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:35:11,938 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-23 20:35:11,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:35:11,939 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:11,939 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:12,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:12,147 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:12,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:12,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1025155465, now seen corresponding path program 3 times [2019-11-23 20:35:12,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:12,148 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504824104] [2019-11-23 20:35:12,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:12,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:35:12,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504824104] [2019-11-23 20:35:12,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737502258] [2019-11-23 20:35:12,275 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:12,322 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:35:12,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:12,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:35:12,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:12,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:35:12,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:12,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:35:12,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613854125] [2019-11-23 20:35:12,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:35:12,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:12,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:35:12,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:35:12,349 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 7 states. [2019-11-23 20:35:12,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:12,435 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2019-11-23 20:35:12,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:35:12,435 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-11-23 20:35:12,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:12,436 INFO L225 Difference]: With dead ends: 50 [2019-11-23 20:35:12,436 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 20:35:12,437 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:35:12,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 20:35:12,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 19. [2019-11-23 20:35:12,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:35:12,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-23 20:35:12,443 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2019-11-23 20:35:12,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:12,443 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-23 20:35:12,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:35:12,443 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-23 20:35:12,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:35:12,444 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:12,444 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:12,647 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:12,648 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:12,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:12,648 INFO L82 PathProgramCache]: Analyzing trace with hash -57020904, now seen corresponding path program 4 times [2019-11-23 20:35:12,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:12,650 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591371396] [2019-11-23 20:35:12,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:35:12,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591371396] [2019-11-23 20:35:12,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431185956] [2019-11-23 20:35:12,733 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:12,779 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:12,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:12,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:35:12,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:35:12,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:12,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:35:12,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111254726] [2019-11-23 20:35:12,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:35:12,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:12,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:35:12,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:35:12,806 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 8 states. [2019-11-23 20:35:12,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:12,885 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2019-11-23 20:35:12,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:35:12,887 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-11-23 20:35:12,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:12,887 INFO L225 Difference]: With dead ends: 58 [2019-11-23 20:35:12,888 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:35:12,888 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:35:12,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:35:12,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 21. [2019-11-23 20:35:12,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:35:12,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-23 20:35:12,895 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2019-11-23 20:35:12,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:12,895 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-23 20:35:12,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:35:12,895 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-23 20:35:12,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:35:12,896 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:12,896 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:13,099 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:13,099 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:13,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:13,100 INFO L82 PathProgramCache]: Analyzing trace with hash 315153751, now seen corresponding path program 5 times [2019-11-23 20:35:13,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:13,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656116776] [2019-11-23 20:35:13,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:13,204 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:35:13,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656116776] [2019-11-23 20:35:13,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95103415] [2019-11-23 20:35:13,205 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:13,297 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:35:13,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:13,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:35:13,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:35:13,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:13,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:35:13,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904405482] [2019-11-23 20:35:13,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:35:13,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:13,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:35:13,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:35:13,320 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 9 states. [2019-11-23 20:35:13,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:13,398 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2019-11-23 20:35:13,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:35:13,398 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2019-11-23 20:35:13,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:13,399 INFO L225 Difference]: With dead ends: 66 [2019-11-23 20:35:13,399 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 20:35:13,400 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:35:13,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 20:35:13,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 23. [2019-11-23 20:35:13,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:35:13,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-11-23 20:35:13,411 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2019-11-23 20:35:13,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:13,412 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-11-23 20:35:13,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:35:13,413 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-11-23 20:35:13,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:35:13,414 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:13,414 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:13,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:13,615 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:13,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:13,616 INFO L82 PathProgramCache]: Analyzing trace with hash -846090056, now seen corresponding path program 6 times [2019-11-23 20:35:13,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:13,617 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478438692] [2019-11-23 20:35:13,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:13,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:35:13,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478438692] [2019-11-23 20:35:13,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368185917] [2019-11-23 20:35:13,731 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:13,795 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:35:13,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:13,796 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:35:13,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:35:13,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:13,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:35:13,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970022984] [2019-11-23 20:35:13,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:35:13,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:13,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:35:13,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:35:13,823 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 10 states. [2019-11-23 20:35:13,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:13,913 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2019-11-23 20:35:13,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:35:13,915 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-23 20:35:13,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:13,916 INFO L225 Difference]: With dead ends: 74 [2019-11-23 20:35:13,917 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:35:13,917 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:35:13,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:35:13,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 25. [2019-11-23 20:35:13,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 20:35:13,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-11-23 20:35:13,927 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2019-11-23 20:35:13,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:13,927 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-11-23 20:35:13,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:35:13,927 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-11-23 20:35:13,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:35:13,929 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:13,929 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:14,133 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:14,134 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:14,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:14,134 INFO L82 PathProgramCache]: Analyzing trace with hash 401699895, now seen corresponding path program 7 times [2019-11-23 20:35:14,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:14,135 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292339668] [2019-11-23 20:35:14,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:14,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:35:14,238 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292339668] [2019-11-23 20:35:14,238 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753750098] [2019-11-23 20:35:14,238 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:14,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:35:14,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:14,309 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:35:14,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:14,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:35:14,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785626555] [2019-11-23 20:35:14,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:35:14,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:14,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:35:14,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:35:14,311 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2019-11-23 20:35:14,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:14,416 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2019-11-23 20:35:14,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:35:14,417 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2019-11-23 20:35:14,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:14,418 INFO L225 Difference]: With dead ends: 82 [2019-11-23 20:35:14,418 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:35:14,419 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:35:14,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:35:14,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 27. [2019-11-23 20:35:14,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:35:14,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-11-23 20:35:14,429 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 23 [2019-11-23 20:35:14,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:14,429 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-11-23 20:35:14,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:35:14,429 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-11-23 20:35:14,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:35:14,430 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:14,430 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:14,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:14,641 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:14,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:14,641 INFO L82 PathProgramCache]: Analyzing trace with hash -88564904, now seen corresponding path program 8 times [2019-11-23 20:35:14,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:14,643 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522341586] [2019-11-23 20:35:14,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:35:14,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522341586] [2019-11-23 20:35:14,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587272597] [2019-11-23 20:35:14,743 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:14,795 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:14,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:14,796 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:35:14,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:35:14,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:14,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:35:14,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384580666] [2019-11-23 20:35:14,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:35:14,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:14,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:35:14,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:35:14,823 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 12 states. [2019-11-23 20:35:14,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:14,916 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2019-11-23 20:35:14,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:35:14,917 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2019-11-23 20:35:14,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:14,918 INFO L225 Difference]: With dead ends: 90 [2019-11-23 20:35:14,918 INFO L226 Difference]: Without dead ends: 74 [2019-11-23 20:35:14,919 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:35:14,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-23 20:35:14,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 29. [2019-11-23 20:35:14,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:35:14,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-11-23 20:35:14,932 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2019-11-23 20:35:14,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:14,933 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-11-23 20:35:14,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:35:14,933 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-11-23 20:35:14,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:35:14,934 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:14,935 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:15,138 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:15,139 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:15,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:15,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1068424425, now seen corresponding path program 9 times [2019-11-23 20:35:15,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:15,140 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625598726] [2019-11-23 20:35:15,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:15,270 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-23 20:35:15,270 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625598726] [2019-11-23 20:35:15,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790118068] [2019-11-23 20:35:15,271 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:15,596 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:35:15,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:15,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:35:15,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-23 20:35:15,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:15,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:35:15,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060911824] [2019-11-23 20:35:15,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:35:15,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:15,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:35:15,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:35:15,618 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 13 states. [2019-11-23 20:35:15,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:15,731 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2019-11-23 20:35:15,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:35:15,732 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2019-11-23 20:35:15,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:15,733 INFO L225 Difference]: With dead ends: 98 [2019-11-23 20:35:15,733 INFO L226 Difference]: Without dead ends: 81 [2019-11-23 20:35:15,734 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:35:15,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-23 20:35:15,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 31. [2019-11-23 20:35:15,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 20:35:15,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-11-23 20:35:15,738 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2019-11-23 20:35:15,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:15,739 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-11-23 20:35:15,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:35:15,739 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-11-23 20:35:15,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:35:15,740 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:15,740 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:15,944 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:15,944 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:15,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:15,945 INFO L82 PathProgramCache]: Analyzing trace with hash 163360248, now seen corresponding path program 10 times [2019-11-23 20:35:15,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:15,946 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420230092] [2019-11-23 20:35:15,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 20:35:16,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420230092] [2019-11-23 20:35:16,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135466669] [2019-11-23 20:35:16,062 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:16,115 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:16,116 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:16,117 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:35:16,119 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 20:35:16,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:16,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:35:16,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527508565] [2019-11-23 20:35:16,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:35:16,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:16,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:35:16,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:35:16,145 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 14 states. [2019-11-23 20:35:16,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:16,287 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2019-11-23 20:35:16,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:35:16,288 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2019-11-23 20:35:16,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:16,288 INFO L225 Difference]: With dead ends: 106 [2019-11-23 20:35:16,289 INFO L226 Difference]: Without dead ends: 88 [2019-11-23 20:35:16,289 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:35:16,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-23 20:35:16,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 33. [2019-11-23 20:35:16,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:35:16,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-11-23 20:35:16,295 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2019-11-23 20:35:16,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:16,295 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-11-23 20:35:16,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:35:16,295 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-11-23 20:35:16,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:35:16,296 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:16,296 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:16,499 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:16,500 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:16,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:16,501 INFO L82 PathProgramCache]: Analyzing trace with hash 425322999, now seen corresponding path program 11 times [2019-11-23 20:35:16,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:16,502 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086375899] [2019-11-23 20:35:16,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:35:16,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086375899] [2019-11-23 20:35:16,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171417590] [2019-11-23 20:35:16,647 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:17,758 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-23 20:35:17,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:17,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:35:17,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:35:17,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:17,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:35:17,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208382989] [2019-11-23 20:35:17,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:35:17,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:17,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:35:17,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:35:17,800 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 15 states. [2019-11-23 20:35:17,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:17,911 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2019-11-23 20:35:17,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:35:17,912 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2019-11-23 20:35:17,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:17,912 INFO L225 Difference]: With dead ends: 114 [2019-11-23 20:35:17,913 INFO L226 Difference]: Without dead ends: 95 [2019-11-23 20:35:17,913 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:35:17,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-23 20:35:17,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 35. [2019-11-23 20:35:17,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 20:35:17,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-11-23 20:35:17,918 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 31 [2019-11-23 20:35:17,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:17,918 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-11-23 20:35:17,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:35:17,918 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-11-23 20:35:17,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:35:17,919 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:17,919 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:18,120 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:18,120 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:18,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1597249384, now seen corresponding path program 12 times [2019-11-23 20:35:18,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:18,122 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032027953] [2019-11-23 20:35:18,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-23 20:35:18,281 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032027953] [2019-11-23 20:35:18,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368204961] [2019-11-23 20:35:18,282 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 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 [2019-11-23 20:35:19,723 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:35:19,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:19,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:35:19,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-23 20:35:19,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:19,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:35:19,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164179242] [2019-11-23 20:35:19,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:35:19,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:19,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:35:19,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:35:19,748 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 16 states. [2019-11-23 20:35:19,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:19,874 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2019-11-23 20:35:19,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:35:19,874 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2019-11-23 20:35:19,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:19,875 INFO L225 Difference]: With dead ends: 122 [2019-11-23 20:35:19,875 INFO L226 Difference]: Without dead ends: 102 [2019-11-23 20:35:19,875 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:35:19,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-23 20:35:19,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 37. [2019-11-23 20:35:19,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 20:35:19,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-11-23 20:35:19,880 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 33 [2019-11-23 20:35:19,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:19,881 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-11-23 20:35:19,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:35:19,881 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-11-23 20:35:19,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:35:19,882 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:19,882 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:20,082 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:20,083 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:20,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:20,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1878902999, now seen corresponding path program 13 times [2019-11-23 20:35:20,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:20,083 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456799875] [2019-11-23 20:35:20,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:35:20,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456799875] [2019-11-23 20:35:20,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007911861] [2019-11-23 20:35:20,235 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 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 [2019-11-23 20:35:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:20,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:35:20,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:35:20,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:20,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:35:20,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174881106] [2019-11-23 20:35:20,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:35:20,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:20,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:35:20,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:35:20,327 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 17 states. [2019-11-23 20:35:20,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:20,438 INFO L93 Difference]: Finished difference Result 130 states and 135 transitions. [2019-11-23 20:35:20,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:35:20,438 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2019-11-23 20:35:20,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:20,440 INFO L225 Difference]: With dead ends: 130 [2019-11-23 20:35:20,440 INFO L226 Difference]: Without dead ends: 109 [2019-11-23 20:35:20,441 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:35:20,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-23 20:35:20,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 39. [2019-11-23 20:35:20,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:35:20,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-11-23 20:35:20,445 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 35 [2019-11-23 20:35:20,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:20,446 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-11-23 20:35:20,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:35:20,446 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-11-23 20:35:20,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 20:35:20,447 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:20,447 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:20,647 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:20,648 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:20,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:20,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1720994616, now seen corresponding path program 14 times [2019-11-23 20:35:20,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:20,649 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279062564] [2019-11-23 20:35:20,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:35:20,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279062564] [2019-11-23 20:35:20,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902119446] [2019-11-23 20:35:20,792 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 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 [2019-11-23 20:35:20,840 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:20,840 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:20,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:35:20,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:35:20,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:20,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:35:20,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707574539] [2019-11-23 20:35:20,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:35:20,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:20,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:35:20,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:35:20,866 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 18 states. [2019-11-23 20:35:21,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:21,016 INFO L93 Difference]: Finished difference Result 138 states and 143 transitions. [2019-11-23 20:35:21,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:35:21,018 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2019-11-23 20:35:21,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:21,019 INFO L225 Difference]: With dead ends: 138 [2019-11-23 20:35:21,019 INFO L226 Difference]: Without dead ends: 116 [2019-11-23 20:35:21,020 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:35:21,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-23 20:35:21,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 41. [2019-11-23 20:35:21,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 20:35:21,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-11-23 20:35:21,033 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2019-11-23 20:35:21,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:21,033 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-11-23 20:35:21,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:35:21,033 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-11-23 20:35:21,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:35:21,034 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:21,034 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:21,234 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:21,235 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:21,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:21,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1890500535, now seen corresponding path program 15 times [2019-11-23 20:35:21,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:21,236 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661996038] [2019-11-23 20:35:21,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-11-23 20:35:21,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661996038] [2019-11-23 20:35:21,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85835649] [2019-11-23 20:35:21,601 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 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 [2019-11-23 20:35:26,101 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:35:26,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:26,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:35:26,109 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-11-23 20:35:26,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:26,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:35:26,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566491912] [2019-11-23 20:35:26,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:35:26,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:26,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:35:26,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:35:26,127 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 19 states. [2019-11-23 20:35:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:26,271 INFO L93 Difference]: Finished difference Result 146 states and 151 transitions. [2019-11-23 20:35:26,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:35:26,272 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2019-11-23 20:35:26,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:26,272 INFO L225 Difference]: With dead ends: 146 [2019-11-23 20:35:26,273 INFO L226 Difference]: Without dead ends: 123 [2019-11-23 20:35:26,273 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:35:26,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-23 20:35:26,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 43. [2019-11-23 20:35:26,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 20:35:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2019-11-23 20:35:26,278 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 39 [2019-11-23 20:35:26,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:26,279 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2019-11-23 20:35:26,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:35:26,279 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2019-11-23 20:35:26,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:35:26,279 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:26,280 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:26,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:26,480 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:26,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:26,481 INFO L82 PathProgramCache]: Analyzing trace with hash -498870824, now seen corresponding path program 16 times [2019-11-23 20:35:26,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:26,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562173819] [2019-11-23 20:35:26,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 20:35:26,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562173819] [2019-11-23 20:35:26,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645815359] [2019-11-23 20:35:26,675 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 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 [2019-11-23 20:35:26,733 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:26,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:26,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:35:26,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 20:35:26,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:26,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:35:26,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181655970] [2019-11-23 20:35:26,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:35:26,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:26,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:35:26,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:35:26,772 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 20 states. [2019-11-23 20:35:26,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:26,913 INFO L93 Difference]: Finished difference Result 154 states and 159 transitions. [2019-11-23 20:35:26,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:35:26,914 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2019-11-23 20:35:26,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:26,915 INFO L225 Difference]: With dead ends: 154 [2019-11-23 20:35:26,915 INFO L226 Difference]: Without dead ends: 130 [2019-11-23 20:35:26,916 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:35:26,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-11-23 20:35:26,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 45. [2019-11-23 20:35:26,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 20:35:26,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2019-11-23 20:35:26,920 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2019-11-23 20:35:26,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:26,921 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2019-11-23 20:35:26,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:35:26,921 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2019-11-23 20:35:26,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:35:26,922 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:26,922 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:27,125 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:27,126 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:27,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:27,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1197395607, now seen corresponding path program 17 times [2019-11-23 20:35:27,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:27,126 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553957934] [2019-11-23 20:35:27,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-23 20:35:27,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553957934] [2019-11-23 20:35:27,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743052823] [2019-11-23 20:35:27,317 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 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 [2019-11-23 20:35:45,524 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-23 20:35:45,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:45,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:35:45,540 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:45,554 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-23 20:35:45,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:45,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 20:35:45,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461806083] [2019-11-23 20:35:45,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:35:45,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:45,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:35:45,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:35:45,556 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 21 states. [2019-11-23 20:35:45,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:45,718 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2019-11-23 20:35:45,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:35:45,718 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 43 [2019-11-23 20:35:45,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:45,719 INFO L225 Difference]: With dead ends: 162 [2019-11-23 20:35:45,719 INFO L226 Difference]: Without dead ends: 137 [2019-11-23 20:35:45,719 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:35:45,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-11-23 20:35:45,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 47. [2019-11-23 20:35:45,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 20:35:45,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2019-11-23 20:35:45,724 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 43 [2019-11-23 20:35:45,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:45,724 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2019-11-23 20:35:45,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:35:45,724 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2019-11-23 20:35:45,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:35:45,725 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:45,725 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:45,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:45,937 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:45,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:45,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1535674488, now seen corresponding path program 18 times [2019-11-23 20:35:45,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:45,938 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471443669] [2019-11-23 20:35:45,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-11-23 20:35:46,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471443669] [2019-11-23 20:35:46,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615220442] [2019-11-23 20:35:46,149 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 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 [2019-11-23 20:36:12,375 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-11-23 20:36:12,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:12,390 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:36:12,391 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-11-23 20:36:12,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:12,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-23 20:36:12,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783656299] [2019-11-23 20:36:12,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:36:12,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:12,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:36:12,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:36:12,422 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 22 states. [2019-11-23 20:36:12,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:12,560 INFO L93 Difference]: Finished difference Result 170 states and 175 transitions. [2019-11-23 20:36:12,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:36:12,560 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2019-11-23 20:36:12,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:12,562 INFO L225 Difference]: With dead ends: 170 [2019-11-23 20:36:12,562 INFO L226 Difference]: Without dead ends: 144 [2019-11-23 20:36:12,563 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:36:12,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-11-23 20:36:12,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 49. [2019-11-23 20:36:12,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 20:36:12,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2019-11-23 20:36:12,568 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 45 [2019-11-23 20:36:12,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:12,568 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2019-11-23 20:36:12,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:36:12,568 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2019-11-23 20:36:12,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:36:12,569 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:12,569 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:12,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:12,773 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:12,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:12,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1082133129, now seen corresponding path program 19 times [2019-11-23 20:36:12,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:12,775 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880326951] [2019-11-23 20:36:12,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:13,033 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-23 20:36:13,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880326951] [2019-11-23 20:36:13,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260097502] [2019-11-23 20:36:13,034 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 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 [2019-11-23 20:36:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:13,096 INFO L255 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:36:13,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-23 20:36:13,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:13,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:36:13,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388619495] [2019-11-23 20:36:13,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:36:13,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:13,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:36:13,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:36:13,112 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 23 states. [2019-11-23 20:36:13,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:13,236 INFO L93 Difference]: Finished difference Result 178 states and 183 transitions. [2019-11-23 20:36:13,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:36:13,236 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 47 [2019-11-23 20:36:13,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:13,237 INFO L225 Difference]: With dead ends: 178 [2019-11-23 20:36:13,237 INFO L226 Difference]: Without dead ends: 151 [2019-11-23 20:36:13,238 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:36:13,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-11-23 20:36:13,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 51. [2019-11-23 20:36:13,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-23 20:36:13,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2019-11-23 20:36:13,244 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 47 [2019-11-23 20:36:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:13,245 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2019-11-23 20:36:13,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:36:13,245 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2019-11-23 20:36:13,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:36:13,245 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:13,245 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:13,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:13,455 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:13,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:13,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1164942568, now seen corresponding path program 20 times [2019-11-23 20:36:13,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:13,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603555109] [2019-11-23 20:36:13,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:36:13,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603555109] [2019-11-23 20:36:13,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548710822] [2019-11-23 20:36:13,802 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 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 [2019-11-23 20:36:13,878 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:36:13,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:13,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:36:13,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:13,896 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:36:13,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:13,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:36:13,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100324262] [2019-11-23 20:36:13,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:36:13,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:13,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:36:13,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:36:13,898 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 24 states. [2019-11-23 20:36:14,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:14,063 INFO L93 Difference]: Finished difference Result 186 states and 191 transitions. [2019-11-23 20:36:14,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:36:14,064 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2019-11-23 20:36:14,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:14,065 INFO L225 Difference]: With dead ends: 186 [2019-11-23 20:36:14,065 INFO L226 Difference]: Without dead ends: 158 [2019-11-23 20:36:14,065 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:36:14,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-11-23 20:36:14,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 53. [2019-11-23 20:36:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:36:14,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2019-11-23 20:36:14,074 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 49 [2019-11-23 20:36:14,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:14,076 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2019-11-23 20:36:14,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:36:14,076 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2019-11-23 20:36:14,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:36:14,077 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:14,077 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:14,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:14,278 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:14,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:14,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1677997143, now seen corresponding path program 21 times [2019-11-23 20:36:14,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:14,278 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37710374] [2019-11-23 20:36:14,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-11-23 20:36:14,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37710374] [2019-11-23 20:36:14,573 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260328365] [2019-11-23 20:36:14,573 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:27,178 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:36:27,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:27,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:36:27,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-11-23 20:36:27,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:27,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-23 20:36:27,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995374120] [2019-11-23 20:36:27,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:36:27,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:27,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:36:27,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:36:27,205 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 25 states. [2019-11-23 20:36:27,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:27,392 INFO L93 Difference]: Finished difference Result 194 states and 199 transitions. [2019-11-23 20:36:27,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:36:27,395 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2019-11-23 20:36:27,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:27,396 INFO L225 Difference]: With dead ends: 194 [2019-11-23 20:36:27,396 INFO L226 Difference]: Without dead ends: 165 [2019-11-23 20:36:27,397 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:36:27,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-23 20:36:27,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 55. [2019-11-23 20:36:27,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 20:36:27,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2019-11-23 20:36:27,403 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 51 [2019-11-23 20:36:27,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:27,403 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2019-11-23 20:36:27,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:36:27,403 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2019-11-23 20:36:27,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:36:27,404 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:27,404 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:27,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:27,613 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:27,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:27,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1745446328, now seen corresponding path program 22 times [2019-11-23 20:36:27,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:27,614 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246407694] [2019-11-23 20:36:27,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:28,022 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-23 20:36:28,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246407694] [2019-11-23 20:36:28,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215602801] [2019-11-23 20:36:28,023 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:28,085 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:36:28,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:28,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:36:28,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-23 20:36:28,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:28,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:36:28,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410907513] [2019-11-23 20:36:28,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:36:28,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:28,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:36:28,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:36:28,103 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 26 states. [2019-11-23 20:36:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:28,296 INFO L93 Difference]: Finished difference Result 202 states and 207 transitions. [2019-11-23 20:36:28,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:36:28,296 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 53 [2019-11-23 20:36:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:28,297 INFO L225 Difference]: With dead ends: 202 [2019-11-23 20:36:28,297 INFO L226 Difference]: Without dead ends: 172 [2019-11-23 20:36:28,298 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:36:28,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-11-23 20:36:28,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 57. [2019-11-23 20:36:28,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 20:36:28,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2019-11-23 20:36:28,302 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 53 [2019-11-23 20:36:28,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:28,302 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2019-11-23 20:36:28,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:36:28,303 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2019-11-23 20:36:28,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:36:28,303 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:28,303 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:28,506 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:28,507 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:28,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:28,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1621259465, now seen corresponding path program 23 times [2019-11-23 20:36:28,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:28,508 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611086613] [2019-11-23 20:36:28,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-11-23 20:36:28,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611086613] [2019-11-23 20:36:28,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950243972] [2019-11-23 20:36:28,853 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true