/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:15:24,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:15:24,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:15:24,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:15:24,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:15:24,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:15:24,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:15:24,124 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:15:24,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:15:24,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:15:24,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:15:24,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:15:24,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:15:24,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:15:24,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:15:24,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:15:24,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:15:24,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:15:24,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:15:24,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:15:24,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:15:24,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:15:24,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:15:24,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:15:24,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:15:24,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:15:24,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:15:24,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:15:24,170 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:15:24,205 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:15:24,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:15:24,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:15:24,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:15:24,211 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:15:24,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:15:24,211 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:15:24,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:15:24,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:15:24,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:15:24,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:15:24,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:15:24,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:15:24,212 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:15:24,212 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:15:24,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:15:24,215 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:15:24,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:15:24,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:15:24,215 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:15:24,216 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:15:24,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:15:24,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:15:24,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:15:24,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:15:24,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:15:24,217 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:15:24,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:15:24,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:15:24,217 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:15:24,531 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:15:24,544 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:15:24,547 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:15:24,548 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:15:24,549 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:15:24,549 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const5.c [2019-11-23 20:15:24,605 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5abe99a7e/ded2b4de5c0b450989eb837e5bad7fb9/FLAG4b8d3f06f [2019-11-23 20:15:25,078 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:15:25,079 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const5.c [2019-11-23 20:15:25,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5abe99a7e/ded2b4de5c0b450989eb837e5bad7fb9/FLAG4b8d3f06f [2019-11-23 20:15:25,465 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5abe99a7e/ded2b4de5c0b450989eb837e5bad7fb9 [2019-11-23 20:15:25,476 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:15:25,477 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:15:25,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:15:25,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:15:25,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:15:25,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:15:25" (1/1) ... [2019-11-23 20:15:25,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f6ae731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:25, skipping insertion in model container [2019-11-23 20:15:25,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:15:25" (1/1) ... [2019-11-23 20:15:25,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:15:25,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:15:25,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:15:25,730 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:15:25,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:15:25,767 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:15:25,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:25 WrapperNode [2019-11-23 20:15:25,767 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:15:25,768 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:15:25,768 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:15:25,768 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:15:25,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:25" (1/1) ... [2019-11-23 20:15:25,891 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:25" (1/1) ... [2019-11-23 20:15:25,916 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:15:25,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:15:25,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:15:25,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:15:25,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:25" (1/1) ... [2019-11-23 20:15:25,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:25" (1/1) ... [2019-11-23 20:15:25,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:25" (1/1) ... [2019-11-23 20:15:25,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:25" (1/1) ... [2019-11-23 20:15:25,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:25" (1/1) ... [2019-11-23 20:15:25,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:25" (1/1) ... [2019-11-23 20:15:25,946 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:25" (1/1) ... [2019-11-23 20:15:25,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:15:25,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:15:25,949 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:15:25,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:15:25,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:15:26,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:15:26,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 20:15:26,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:15:26,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:15:26,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:15:26,381 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:15:26,381 INFO L284 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-23 20:15:26,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:15:26 BoogieIcfgContainer [2019-11-23 20:15:26,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:15:26,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:15:26,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:15:26,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:15:26,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:15:25" (1/3) ... [2019-11-23 20:15:26,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c4c02cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:15:26, skipping insertion in model container [2019-11-23 20:15:26,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:25" (2/3) ... [2019-11-23 20:15:26,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c4c02cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:15:26, skipping insertion in model container [2019-11-23 20:15:26,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:15:26" (3/3) ... [2019-11-23 20:15:26,396 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const5.c [2019-11-23 20:15:26,404 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:15:26,409 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:15:26,420 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:15:26,440 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:15:26,441 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:15:26,441 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:15:26,441 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:15:26,441 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:15:26,441 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:15:26,441 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:15:26,442 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:15:26,456 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2019-11-23 20:15:26,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:15:26,464 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:26,465 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:26,465 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:26,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:26,471 INFO L82 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2019-11-23 20:15:26,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:26,480 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612891863] [2019-11-23 20:15:26,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:26,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612891863] [2019-11-23 20:15:26,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:15:26,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:15:26,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280356039] [2019-11-23 20:15:26,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:15:26,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:26,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:15:26,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:15:26,630 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2019-11-23 20:15:26,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:26,654 INFO L93 Difference]: Finished difference Result 81 states and 124 transitions. [2019-11-23 20:15:26,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:15:26,656 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2019-11-23 20:15:26,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:26,668 INFO L225 Difference]: With dead ends: 81 [2019-11-23 20:15:26,669 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 20:15:26,672 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:15:26,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 20:15:26,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-23 20:15:26,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:15:26,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2019-11-23 20:15:26,717 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2019-11-23 20:15:26,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:26,718 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2019-11-23 20:15:26,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:15:26,718 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2019-11-23 20:15:26,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:15:26,719 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:26,719 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:26,720 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:26,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:26,720 INFO L82 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2019-11-23 20:15:26,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:26,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859695730] [2019-11-23 20:15:26,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:26,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859695730] [2019-11-23 20:15:26,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:15:26,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:15:26,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759198915] [2019-11-23 20:15:26,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:15:26,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:26,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:15:26,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:15:26,850 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 4 states. [2019-11-23 20:15:26,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:26,965 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2019-11-23 20:15:26,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:15:26,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-11-23 20:15:26,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:26,967 INFO L225 Difference]: With dead ends: 62 [2019-11-23 20:15:26,968 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:15:26,970 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:15:26,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:15:26,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-23 20:15:26,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:15:26,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2019-11-23 20:15:26,995 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 27 [2019-11-23 20:15:26,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:26,995 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2019-11-23 20:15:26,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:15:26,996 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2019-11-23 20:15:26,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:15:26,998 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:26,999 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:26,999 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:26,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:27,000 INFO L82 PathProgramCache]: Analyzing trace with hash -829891778, now seen corresponding path program 1 times [2019-11-23 20:15:27,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:27,001 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18797890] [2019-11-23 20:15:27,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:15:27,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18797890] [2019-11-23 20:15:27,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:15:27,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:15:27,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021104949] [2019-11-23 20:15:27,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:15:27,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:27,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:15:27,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:15:27,121 INFO L87 Difference]: Start difference. First operand 58 states and 77 transitions. Second operand 3 states. [2019-11-23 20:15:27,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:27,254 INFO L93 Difference]: Finished difference Result 113 states and 151 transitions. [2019-11-23 20:15:27,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:15:27,255 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-11-23 20:15:27,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:27,256 INFO L225 Difference]: With dead ends: 113 [2019-11-23 20:15:27,257 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:15:27,258 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:15:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:15:27,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-11-23 20:15:27,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 20:15:27,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2019-11-23 20:15:27,275 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 29 [2019-11-23 20:15:27,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:27,275 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 78 transitions. [2019-11-23 20:15:27,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:15:27,278 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions. [2019-11-23 20:15:27,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:15:27,279 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:27,280 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:27,280 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:27,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:27,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1139067424, now seen corresponding path program 1 times [2019-11-23 20:15:27,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:27,282 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049105460] [2019-11-23 20:15:27,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:27,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:15:27,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049105460] [2019-11-23 20:15:27,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:15:27,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:15:27,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538051514] [2019-11-23 20:15:27,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:15:27,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:27,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:15:27,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:15:27,397 INFO L87 Difference]: Start difference. First operand 59 states and 78 transitions. Second operand 4 states. [2019-11-23 20:15:27,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:27,571 INFO L93 Difference]: Finished difference Result 109 states and 145 transitions. [2019-11-23 20:15:27,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:15:27,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2019-11-23 20:15:27,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:27,573 INFO L225 Difference]: With dead ends: 109 [2019-11-23 20:15:27,573 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:15:27,576 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:15:27,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:15:27,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2019-11-23 20:15:27,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:15:27,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2019-11-23 20:15:27,583 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 31 [2019-11-23 20:15:27,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:27,583 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2019-11-23 20:15:27,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:15:27,584 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2019-11-23 20:15:27,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:15:27,585 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:27,585 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:27,585 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:27,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:27,586 INFO L82 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2019-11-23 20:15:27,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:27,586 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091968946] [2019-11-23 20:15:27,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:15:27,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091968946] [2019-11-23 20:15:27,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377279612] [2019-11-23 20:15:27,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:27,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:15:27,741 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:15:27,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:27,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 20:15:27,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827704284] [2019-11-23 20:15:27,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:15:27,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:27,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:15:27,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:15:27,799 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 6 states. [2019-11-23 20:15:27,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:27,950 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2019-11-23 20:15:27,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:15:27,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2019-11-23 20:15:27,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:27,952 INFO L225 Difference]: With dead ends: 97 [2019-11-23 20:15:27,952 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 20:15:27,953 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:15:27,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 20:15:27,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-11-23 20:15:27,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 20:15:27,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2019-11-23 20:15:27,960 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2019-11-23 20:15:27,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:27,960 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2019-11-23 20:15:27,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:15:27,960 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2019-11-23 20:15:27,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:15:27,962 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:27,962 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:28,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:28,166 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:28,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:28,167 INFO L82 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2019-11-23 20:15:28,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:28,167 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174130750] [2019-11-23 20:15:28,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:28,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:15:28,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174130750] [2019-11-23 20:15:28,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753705972] [2019-11-23 20:15:28,305 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:28,359 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:15:28,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:28,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:15:28,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:15:28,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:28,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2019-11-23 20:15:28,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833831020] [2019-11-23 20:15:28,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:15:28,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:28,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:15:28,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:15:28,403 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 7 states. [2019-11-23 20:15:28,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:28,636 INFO L93 Difference]: Finished difference Result 123 states and 151 transitions. [2019-11-23 20:15:28,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:15:28,637 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2019-11-23 20:15:28,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:28,638 INFO L225 Difference]: With dead ends: 123 [2019-11-23 20:15:28,638 INFO L226 Difference]: Without dead ends: 83 [2019-11-23 20:15:28,639 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:15:28,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-23 20:15:28,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2019-11-23 20:15:28,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:15:28,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2019-11-23 20:15:28,647 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2019-11-23 20:15:28,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:28,648 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2019-11-23 20:15:28,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:15:28,648 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2019-11-23 20:15:28,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:15:28,649 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:28,649 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:28,853 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:28,853 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:28,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:28,854 INFO L82 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2019-11-23 20:15:28,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:28,855 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233982099] [2019-11-23 20:15:28,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:30,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233982099] [2019-11-23 20:15:30,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685177923] [2019-11-23 20:15:30,765 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:30,835 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:15:30,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:30,839 WARN L253 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 107 conjunts are in the unsatisfiable core [2019-11-23 20:15:30,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:32,432 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:32,433 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2019-11-23 20:15:32,435 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-23 20:15:32,447 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:32,448 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:32,452 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:15:32,453 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:32 [2019-11-23 20:15:32,524 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:32,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:32,634 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:32,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:32,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 36 [2019-11-23 20:15:32,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646859002] [2019-11-23 20:15:32,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:15:32,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:32,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:15:32,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:15:32,741 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 36 states. [2019-11-23 20:15:35,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:35,924 INFO L93 Difference]: Finished difference Result 207 states and 237 transitions. [2019-11-23 20:15:35,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:15:35,924 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2019-11-23 20:15:35,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:35,928 INFO L225 Difference]: With dead ends: 207 [2019-11-23 20:15:35,928 INFO L226 Difference]: Without dead ends: 201 [2019-11-23 20:15:35,930 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 55 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=267, Invalid=2489, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 20:15:35,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-11-23 20:15:35,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 125. [2019-11-23 20:15:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-11-23 20:15:35,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2019-11-23 20:15:35,945 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 71 [2019-11-23 20:15:35,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:35,946 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2019-11-23 20:15:35,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:15:35,946 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2019-11-23 20:15:35,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-23 20:15:35,947 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:35,948 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:36,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:36,155 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:36,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:36,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1767165226, now seen corresponding path program 4 times [2019-11-23 20:15:36,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:36,156 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390870148] [2019-11-23 20:15:36,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:15:36,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390870148] [2019-11-23 20:15:36,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347591444] [2019-11-23 20:15:36,256 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:36,312 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:15:36,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:36,313 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:15:36,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:15:36,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:36,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-23 20:15:36,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320932186] [2019-11-23 20:15:36,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:15:36,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:36,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:15:36,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:15:36,385 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand 13 states. [2019-11-23 20:15:36,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:36,867 INFO L93 Difference]: Finished difference Result 289 states and 334 transitions. [2019-11-23 20:15:36,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:15:36,868 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 73 [2019-11-23 20:15:36,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:36,869 INFO L225 Difference]: With dead ends: 289 [2019-11-23 20:15:36,870 INFO L226 Difference]: Without dead ends: 168 [2019-11-23 20:15:36,872 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:15:36,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-11-23 20:15:36,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 140. [2019-11-23 20:15:36,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-11-23 20:15:36,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 158 transitions. [2019-11-23 20:15:36,885 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 158 transitions. Word has length 73 [2019-11-23 20:15:36,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:36,886 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 158 transitions. [2019-11-23 20:15:36,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:15:36,886 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 158 transitions. [2019-11-23 20:15:36,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:15:36,888 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:36,888 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:37,091 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:37,091 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:37,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:37,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1072452492, now seen corresponding path program 5 times [2019-11-23 20:15:37,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:37,092 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729147704] [2019-11-23 20:15:37,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-23 20:15:37,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729147704] [2019-11-23 20:15:37,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366436695] [2019-11-23 20:15:37,206 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:37,351 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:15:37,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:37,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:15:37,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-23 20:15:37,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:37,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-23 20:15:37,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837714590] [2019-11-23 20:15:37,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:15:37,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:37,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:15:37,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:15:37,427 INFO L87 Difference]: Start difference. First operand 140 states and 158 transitions. Second operand 13 states. [2019-11-23 20:15:37,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:37,830 INFO L93 Difference]: Finished difference Result 156 states and 174 transitions. [2019-11-23 20:15:37,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:15:37,830 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 75 [2019-11-23 20:15:37,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:37,831 INFO L225 Difference]: With dead ends: 156 [2019-11-23 20:15:37,831 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 20:15:37,832 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:15:37,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 20:15:37,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2019-11-23 20:15:37,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-23 20:15:37,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2019-11-23 20:15:37,841 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 75 [2019-11-23 20:15:37,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:37,842 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2019-11-23 20:15:37,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:15:37,842 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2019-11-23 20:15:37,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-23 20:15:37,844 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:37,844 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:38,044 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:38,045 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:38,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:38,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1413596990, now seen corresponding path program 6 times [2019-11-23 20:15:38,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:38,046 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022088492] [2019-11-23 20:15:38,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:40,228 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2019-11-23 20:15:40,397 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2019-11-23 20:15:40,569 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2019-11-23 20:15:40,743 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2019-11-23 20:15:40,907 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2019-11-23 20:15:41,537 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2019-11-23 20:15:41,758 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2019-11-23 20:15:41,977 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2019-11-23 20:15:42,183 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2019-11-23 20:15:42,369 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2019-11-23 20:15:42,831 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2019-11-23 20:15:43,040 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2019-11-23 20:15:43,244 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2019-11-23 20:15:43,713 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2019-11-23 20:15:43,942 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2019-11-23 20:15:44,169 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2019-11-23 20:15:44,401 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2019-11-23 20:15:44,610 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2019-11-23 20:15:45,680 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2019-11-23 20:15:45,928 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2019-11-23 20:15:46,126 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2019-11-23 20:15:46,557 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2019-11-23 20:15:46,809 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2019-11-23 20:15:47,026 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2019-11-23 20:15:47,256 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2019-11-23 20:15:47,445 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2019-11-23 20:15:47,969 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2019-11-23 20:15:48,155 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2019-11-23 20:15:48,357 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2019-11-23 20:15:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:49,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022088492] [2019-11-23 20:15:49,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417991079] [2019-11-23 20:15:49,499 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:49,573 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:15:49,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:49,580 WARN L253 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 141 conjunts are in the unsatisfiable core [2019-11-23 20:15:49,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:53,226 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:53,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:53,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 44] total 102 [2019-11-23 20:15:53,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658523536] [2019-11-23 20:15:53,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-11-23 20:15:53,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:53,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-11-23 20:15:53,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1060, Invalid=9242, Unknown=0, NotChecked=0, Total=10302 [2019-11-23 20:15:53,333 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 102 states. [2019-11-23 20:15:55,021 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2019-11-23 20:15:56,629 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 43 [2019-11-23 20:15:57,820 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 49 [2019-11-23 20:15:58,099 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 43 [2019-11-23 20:15:58,392 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 44 [2019-11-23 20:15:58,695 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2019-11-23 20:15:59,605 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2019-11-23 20:15:59,874 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 55 [2019-11-23 20:16:00,145 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2019-11-23 20:16:04,771 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 54 [2019-11-23 20:16:04,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:04,802 INFO L93 Difference]: Finished difference Result 246 states and 274 transitions. [2019-11-23 20:16:04,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:16:04,802 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 93 [2019-11-23 20:16:04,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:04,805 INFO L225 Difference]: With dead ends: 246 [2019-11-23 20:16:04,805 INFO L226 Difference]: Without dead ends: 166 [2019-11-23 20:16:04,810 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 42 SyntacticMatches, 41 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 9383 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=1927, Invalid=15629, Unknown=0, NotChecked=0, Total=17556 [2019-11-23 20:16:04,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-11-23 20:16:04,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2019-11-23 20:16:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-11-23 20:16:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 169 transitions. [2019-11-23 20:16:04,823 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 169 transitions. Word has length 93 [2019-11-23 20:16:04,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:04,823 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 169 transitions. [2019-11-23 20:16:04,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-11-23 20:16:04,824 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 169 transitions. [2019-11-23 20:16:04,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-23 20:16:04,825 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:04,825 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:05,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:05,029 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:05,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:05,030 INFO L82 PathProgramCache]: Analyzing trace with hash 197094432, now seen corresponding path program 7 times [2019-11-23 20:16:05,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:05,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543561452] [2019-11-23 20:16:05,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:16:05,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543561452] [2019-11-23 20:16:05,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319114532] [2019-11-23 20:16:05,151 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:05,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:16:05,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:16:05,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:05,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-11-23 20:16:05,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369855432] [2019-11-23 20:16:05,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:16:05,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:05,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:16:05,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:16:05,348 INFO L87 Difference]: Start difference. First operand 155 states and 169 transitions. Second operand 16 states. [2019-11-23 20:16:05,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:05,998 INFO L93 Difference]: Finished difference Result 357 states and 397 transitions. [2019-11-23 20:16:05,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:16:05,999 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 95 [2019-11-23 20:16:05,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:06,001 INFO L225 Difference]: With dead ends: 357 [2019-11-23 20:16:06,001 INFO L226 Difference]: Without dead ends: 206 [2019-11-23 20:16:06,003 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:16:06,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-11-23 20:16:06,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 178. [2019-11-23 20:16:06,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-11-23 20:16:06,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 196 transitions. [2019-11-23 20:16:06,014 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 196 transitions. Word has length 95 [2019-11-23 20:16:06,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:06,014 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 196 transitions. [2019-11-23 20:16:06,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:16:06,014 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 196 transitions. [2019-11-23 20:16:06,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-23 20:16:06,015 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:06,016 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:06,220 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:06,221 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:06,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:06,221 INFO L82 PathProgramCache]: Analyzing trace with hash -345123774, now seen corresponding path program 8 times [2019-11-23 20:16:06,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:06,222 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346014131] [2019-11-23 20:16:06,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-11-23 20:16:06,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346014131] [2019-11-23 20:16:06,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025314065] [2019-11-23 20:16:06,346 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:06,417 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:16:06,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:06,419 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:16:06,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-11-23 20:16:06,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:06,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-11-23 20:16:06,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413778265] [2019-11-23 20:16:06,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:16:06,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:06,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:16:06,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:16:06,537 INFO L87 Difference]: Start difference. First operand 178 states and 196 transitions. Second operand 16 states. [2019-11-23 20:16:07,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:07,245 INFO L93 Difference]: Finished difference Result 194 states and 212 transitions. [2019-11-23 20:16:07,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:16:07,246 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2019-11-23 20:16:07,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:07,248 INFO L225 Difference]: With dead ends: 194 [2019-11-23 20:16:07,248 INFO L226 Difference]: Without dead ends: 126 [2019-11-23 20:16:07,249 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:16:07,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-23 20:16:07,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2019-11-23 20:16:07,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-23 20:16:07,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2019-11-23 20:16:07,255 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 97 [2019-11-23 20:16:07,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:07,256 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2019-11-23 20:16:07,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:16:07,256 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2019-11-23 20:16:07,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:16:07,257 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:07,257 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:07,459 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:07,460 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:07,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:07,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1433123212, now seen corresponding path program 9 times [2019-11-23 20:16:07,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:07,461 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278611759] [2019-11-23 20:16:07,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:08,739 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2019-11-23 20:16:08,886 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2019-11-23 20:16:09,482 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2019-11-23 20:16:09,754 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2019-11-23 20:16:09,942 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2019-11-23 20:16:10,135 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2019-11-23 20:16:10,320 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2019-11-23 20:16:10,574 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2019-11-23 20:16:10,770 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2019-11-23 20:16:11,018 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2019-11-23 20:16:11,248 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2019-11-23 20:16:11,461 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2019-11-23 20:16:11,685 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2019-11-23 20:16:11,953 WARN L192 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2019-11-23 20:16:12,228 WARN L192 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2019-11-23 20:16:12,487 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2019-11-23 20:16:12,648 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2019-11-23 20:16:12,844 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2019-11-23 20:16:13,040 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2019-11-23 20:16:13,305 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2019-11-23 20:16:13,575 WARN L192 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2019-11-23 20:16:13,845 WARN L192 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2019-11-23 20:16:14,121 WARN L192 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2019-11-23 20:16:14,402 WARN L192 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2019-11-23 20:16:14,720 WARN L192 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2019-11-23 20:16:14,978 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2019-11-23 20:16:15,383 WARN L192 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2019-11-23 20:16:15,828 WARN L192 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2019-11-23 20:16:16,126 WARN L192 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2019-11-23 20:16:16,444 WARN L192 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2019-11-23 20:16:16,701 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2019-11-23 20:16:17,160 WARN L192 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2019-11-23 20:16:17,620 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2019-11-23 20:16:17,903 WARN L192 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2019-11-23 20:16:18,240 WARN L192 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2019-11-23 20:16:18,517 WARN L192 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2019-11-23 20:16:19,010 WARN L192 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2019-11-23 20:16:19,367 WARN L192 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2019-11-23 20:16:19,673 WARN L192 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2019-11-23 20:16:19,986 WARN L192 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2019-11-23 20:16:20,329 WARN L192 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2019-11-23 20:16:20,680 WARN L192 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2019-11-23 20:16:21,006 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2019-11-23 20:16:21,301 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2019-11-23 20:16:21,538 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2019-11-23 20:16:21,835 WARN L192 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2019-11-23 20:16:22,150 WARN L192 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2019-11-23 20:16:22,470 WARN L192 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2019-11-23 20:16:22,793 WARN L192 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2019-11-23 20:16:23,105 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2019-11-23 20:16:23,409 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2019-11-23 20:16:23,693 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2019-11-23 20:16:23,923 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2019-11-23 20:16:24,171 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2019-11-23 20:16:24,425 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2019-11-23 20:16:24,720 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2019-11-23 20:16:25,030 WARN L192 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2019-11-23 20:16:25,321 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2019-11-23 20:16:25,618 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2019-11-23 20:16:25,922 WARN L192 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2019-11-23 20:16:26,235 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2019-11-23 20:16:26,522 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2019-11-23 20:16:26,735 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2019-11-23 20:16:27,173 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2019-11-23 20:16:27,458 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2019-11-23 20:16:27,740 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2019-11-23 20:16:28,026 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2019-11-23 20:16:28,308 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-11-23 20:16:28,605 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-11-23 20:16:28,886 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2019-11-23 20:16:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 1 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:16:30,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278611759] [2019-11-23 20:16:30,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119064732] [2019-11-23 20:16:30,657 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:30,740 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 20:16:30,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:30,747 WARN L253 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 188 conjunts are in the unsatisfiable core [2019-11-23 20:16:30,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:30,819 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:16:30,820 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:16:30,830 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:16:30,831 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:16:30,831 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-11-23 20:16:36,093 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:16:36,095 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:16:36,097 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:16:36,101 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:16:36,130 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:16:36,130 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 69 [2019-11-23 20:16:36,131 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:36,131 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:36,132 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:36,133 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:36,134 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:36,135 INFO L496 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2019-11-23 20:16:36,178 INFO L567 ElimStorePlain]: treesize reduction 101, result has 28.4 percent of original size [2019-11-23 20:16:36,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:36,180 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:16:36,180 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:65, output treesize:20 [2019-11-23 20:16:36,333 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:36,465 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:36,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 7 proven. 160 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:16:36,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:36,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 27] total 118 [2019-11-23 20:16:36,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10499376] [2019-11-23 20:16:36,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 118 states [2019-11-23 20:16:36,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:36,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2019-11-23 20:16:36,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1790, Invalid=12016, Unknown=0, NotChecked=0, Total=13806 [2019-11-23 20:16:36,703 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand 118 states. [2019-11-23 20:16:39,162 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2019-11-23 20:16:39,632 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 42 [2019-11-23 20:16:39,926 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2019-11-23 20:16:41,364 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 57 [2019-11-23 20:16:41,647 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2019-11-23 20:16:42,230 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 46 [2019-11-23 20:16:44,205 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2019-11-23 20:16:44,485 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2019-11-23 20:16:44,842 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 42 [2019-11-23 20:16:46,302 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2019-11-23 20:16:52,854 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 44 [2019-11-23 20:16:52,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:52,905 INFO L93 Difference]: Finished difference Result 222 states and 241 transitions. [2019-11-23 20:16:52,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 20:16:52,906 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 115 [2019-11-23 20:16:52,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:52,908 INFO L225 Difference]: With dead ends: 222 [2019-11-23 20:16:52,908 INFO L226 Difference]: Without dead ends: 218 [2019-11-23 20:16:52,913 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 70 SyntacticMatches, 41 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14846 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=2866, Invalid=21314, Unknown=0, NotChecked=0, Total=24180 [2019-11-23 20:16:52,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-11-23 20:16:52,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 201. [2019-11-23 20:16:52,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2019-11-23 20:16:52,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 220 transitions. [2019-11-23 20:16:52,928 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 220 transitions. Word has length 115 [2019-11-23 20:16:52,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:52,928 INFO L462 AbstractCegarLoop]: Abstraction has 201 states and 220 transitions. [2019-11-23 20:16:52,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 118 states. [2019-11-23 20:16:52,929 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 220 transitions. [2019-11-23 20:16:52,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-23 20:16:52,930 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:52,930 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:53,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:53,134 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:53,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:53,135 INFO L82 PathProgramCache]: Analyzing trace with hash 154504470, now seen corresponding path program 10 times [2019-11-23 20:16:53,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:53,136 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298642125] [2019-11-23 20:16:53,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:16:53,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298642125] [2019-11-23 20:16:53,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628702418] [2019-11-23 20:16:53,275 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:53,353 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:16:53,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:53,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:16:53,358 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:53,465 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:16:53,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:53,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2019-11-23 20:16:53,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623393563] [2019-11-23 20:16:53,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:16:53,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:53,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:16:53,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:16:53,467 INFO L87 Difference]: Start difference. First operand 201 states and 220 transitions. Second operand 19 states. [2019-11-23 20:16:54,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:54,310 INFO L93 Difference]: Finished difference Result 441 states and 486 transitions. [2019-11-23 20:16:54,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:16:54,310 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 117 [2019-11-23 20:16:54,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:54,311 INFO L225 Difference]: With dead ends: 441 [2019-11-23 20:16:54,311 INFO L226 Difference]: Without dead ends: 244 [2019-11-23 20:16:54,312 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:16:54,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-11-23 20:16:54,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 216. [2019-11-23 20:16:54,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-11-23 20:16:54,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 234 transitions. [2019-11-23 20:16:54,324 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 234 transitions. Word has length 117 [2019-11-23 20:16:54,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:54,325 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 234 transitions. [2019-11-23 20:16:54,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:16:54,325 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 234 transitions. [2019-11-23 20:16:54,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-23 20:16:54,326 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:54,326 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:54,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:54,531 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:54,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:54,531 INFO L82 PathProgramCache]: Analyzing trace with hash 28051576, now seen corresponding path program 11 times [2019-11-23 20:16:54,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:54,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213315604] [2019-11-23 20:16:54,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-23 20:16:54,645 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213315604] [2019-11-23 20:16:54,645 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812388961] [2019-11-23 20:16:54,645 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:56,291 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:16:56,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:56,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:16:56,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-23 20:16:56,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:56,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2019-11-23 20:16:56,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455039079] [2019-11-23 20:16:56,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:16:56,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:56,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:16:56,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:16:56,383 INFO L87 Difference]: Start difference. First operand 216 states and 234 transitions. Second operand 19 states. [2019-11-23 20:16:57,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:57,316 INFO L93 Difference]: Finished difference Result 232 states and 250 transitions. [2019-11-23 20:16:57,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:16:57,317 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 119 [2019-11-23 20:16:57,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:57,318 INFO L225 Difference]: With dead ends: 232 [2019-11-23 20:16:57,319 INFO L226 Difference]: Without dead ends: 148 [2019-11-23 20:16:57,319 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:16:57,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-11-23 20:16:57,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 138. [2019-11-23 20:16:57,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-23 20:16:57,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2019-11-23 20:16:57,329 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 119 [2019-11-23 20:16:57,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:57,330 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2019-11-23 20:16:57,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:16:57,330 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2019-11-23 20:16:57,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-23 20:16:57,331 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:57,331 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:57,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:57,537 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:57,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:57,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1639815466, now seen corresponding path program 12 times [2019-11-23 20:16:57,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:57,539 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128908299] [2019-11-23 20:16:57,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat