/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_m2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:16:55,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:16:55,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:16:56,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:16:56,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:16:56,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:16:56,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:16:56,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:16:56,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:16:56,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:16:56,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:16:56,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:16:56,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:16:56,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:16:56,032 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:16:56,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:16:56,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:16:56,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:16:56,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:16:56,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:16:56,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:16:56,049 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:16:56,050 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:16:56,051 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:16:56,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:16:56,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:16:56,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:16:56,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:16:56,065 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 20:16:56,101 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:16:56,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:16:56,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:16:56,106 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:16:56,106 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:16:56,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:16:56,108 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:16:56,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:16:56,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:16:56,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:16:56,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:16:56,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:16:56,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:16:56,109 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:16:56,110 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:16:56,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:16:56,110 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:16:56,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:16:56,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:16:56,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:16:56,111 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:16:56,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:16:56,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:16:56,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:16:56,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:16:56,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:16:56,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:16:56,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:16:56,114 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:16:56,114 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:16:56,408 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:16:56,430 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:16:56,434 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:16:56,437 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:16:56,437 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:16:56,438 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m2.c [2019-11-23 20:16:56,508 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c876d3d1f/940f632c6bd448189a006614cf662f77/FLAGfde9300f0 [2019-11-23 20:16:56,982 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:16:56,983 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m2.c [2019-11-23 20:16:56,990 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c876d3d1f/940f632c6bd448189a006614cf662f77/FLAGfde9300f0 [2019-11-23 20:16:57,392 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c876d3d1f/940f632c6bd448189a006614cf662f77 [2019-11-23 20:16:57,401 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:16:57,402 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:16:57,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:16:57,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:16:57,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:16:57,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:16:57" (1/1) ... [2019-11-23 20:16:57,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76a64cfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:57, skipping insertion in model container [2019-11-23 20:16:57,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:16:57" (1/1) ... [2019-11-23 20:16:57,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:16:57,435 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:16:57,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:16:57,639 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:16:57,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:16:57,760 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:16:57,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:57 WrapperNode [2019-11-23 20:16:57,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:16:57,762 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:16:57,762 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:16:57,762 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:16:57,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:57" (1/1) ... [2019-11-23 20:16:57,780 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:57" (1/1) ... [2019-11-23 20:16:57,799 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:16:57,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:16:57,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:16:57,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:16:57,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:57" (1/1) ... [2019-11-23 20:16:57,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:57" (1/1) ... [2019-11-23 20:16:57,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:57" (1/1) ... [2019-11-23 20:16:57,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:57" (1/1) ... [2019-11-23 20:16:57,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:57" (1/1) ... [2019-11-23 20:16:57,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:57" (1/1) ... [2019-11-23 20:16:57,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:57" (1/1) ... [2019-11-23 20:16:57,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:16:57,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:16:57,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:16:57,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:16:57,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:57" (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 20:16:57,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:16:57,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:16:57,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:16:57,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:16:57,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:16:57,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:16:58,176 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:16:58,176 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 20:16:58,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:16:58 BoogieIcfgContainer [2019-11-23 20:16:58,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:16:58,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:16:58,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:16:58,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:16:58,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:16:57" (1/3) ... [2019-11-23 20:16:58,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a0cc76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:16:58, skipping insertion in model container [2019-11-23 20:16:58,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:57" (2/3) ... [2019-11-23 20:16:58,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a0cc76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:16:58, skipping insertion in model container [2019-11-23 20:16:58,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:16:58" (3/3) ... [2019-11-23 20:16:58,198 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_m2.c [2019-11-23 20:16:58,213 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:16:58,220 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:16:58,241 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:16:58,267 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:16:58,267 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:16:58,267 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:16:58,267 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:16:58,267 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:16:58,268 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:16:58,268 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:16:58,268 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:16:58,282 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-23 20:16:58,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:16:58,291 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:58,291 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:58,292 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:58,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:58,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2019-11-23 20:16:58,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:58,307 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185992765] [2019-11-23 20:16:58,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:58,419 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 20:16:58,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185992765] [2019-11-23 20:16:58,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:16:58,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:16:58,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200332230] [2019-11-23 20:16:58,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:16:58,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:58,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:16:58,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:16:58,443 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-11-23 20:16:58,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:58,459 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2019-11-23 20:16:58,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:16:58,460 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-11-23 20:16:58,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:58,468 INFO L225 Difference]: With dead ends: 47 [2019-11-23 20:16:58,468 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 20:16:58,471 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 20:16:58,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 20:16:58,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-23 20:16:58,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:16:58,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-23 20:16:58,501 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2019-11-23 20:16:58,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:58,502 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-23 20:16:58,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:16:58,502 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-23 20:16:58,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:16:58,503 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:58,503 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:58,504 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:58,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:58,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2019-11-23 20:16:58,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:58,505 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641546227] [2019-11-23 20:16:58,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:58,589 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 20:16:58,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641546227] [2019-11-23 20:16:58,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:16:58,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:16:58,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511412338] [2019-11-23 20:16:58,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:16:58,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:58,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:16:58,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:16:58,594 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 4 states. [2019-11-23 20:16:58,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:58,669 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2019-11-23 20:16:58,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:16:58,670 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 20:16:58,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:58,671 INFO L225 Difference]: With dead ends: 32 [2019-11-23 20:16:58,671 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:16:58,673 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 20:16:58,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:16:58,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-23 20:16:58,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:16:58,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-11-23 20:16:58,688 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2019-11-23 20:16:58,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:58,689 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-11-23 20:16:58,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:16:58,689 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-11-23 20:16:58,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:16:58,691 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:58,691 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:58,692 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:58,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:58,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1458205426, now seen corresponding path program 1 times [2019-11-23 20:16:58,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:58,694 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157294409] [2019-11-23 20:16:58,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:58,752 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 20:16:58,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157294409] [2019-11-23 20:16:58,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:16:58,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:16:58,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496741588] [2019-11-23 20:16:58,754 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:16:58,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:58,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:16:58,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:16:58,755 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 3 states. [2019-11-23 20:16:58,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:58,811 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2019-11-23 20:16:58,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:16:58,814 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 20:16:58,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:58,815 INFO L225 Difference]: With dead ends: 53 [2019-11-23 20:16:58,815 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:16:58,816 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 20:16:58,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:16:58,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-23 20:16:58,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:16:58,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2019-11-23 20:16:58,822 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2019-11-23 20:16:58,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:58,822 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2019-11-23 20:16:58,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:16:58,823 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2019-11-23 20:16:58,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:16:58,824 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:58,824 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:58,824 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:58,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:58,825 INFO L82 PathProgramCache]: Analyzing trace with hash 477186736, now seen corresponding path program 1 times [2019-11-23 20:16:58,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:58,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572445435] [2019-11-23 20:16:58,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:58,910 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 20:16:58,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572445435] [2019-11-23 20:16:58,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:16:58,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:16:58,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979261768] [2019-11-23 20:16:58,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:16:58,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:58,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:16:58,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:16:58,914 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 4 states. [2019-11-23 20:16:59,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:59,024 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2019-11-23 20:16:59,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:16:59,025 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-23 20:16:59,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:59,026 INFO L225 Difference]: With dead ends: 48 [2019-11-23 20:16:59,026 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:16:59,027 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 20:16:59,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:16:59,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-11-23 20:16:59,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:16:59,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-23 20:16:59,039 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19 [2019-11-23 20:16:59,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:59,039 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-23 20:16:59,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:16:59,039 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-23 20:16:59,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:16:59,041 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:59,041 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] [2019-11-23 20:16:59,042 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:59,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:59,042 INFO L82 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2019-11-23 20:16:59,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:59,042 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882514353] [2019-11-23 20:16:59,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:16:59,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882514353] [2019-11-23 20:16:59,152 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378849842] [2019-11-23 20:16:59,152 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 20:16:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:59,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:16:59,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:16:59,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:59,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 20:16:59,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396837697] [2019-11-23 20:16:59,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:16:59,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:59,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:16:59,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:16:59,268 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 6 states. [2019-11-23 20:16:59,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:59,341 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2019-11-23 20:16:59,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:16:59,343 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-11-23 20:16:59,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:59,343 INFO L225 Difference]: With dead ends: 49 [2019-11-23 20:16:59,344 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:16:59,344 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 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 20:16:59,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:16:59,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 20:16:59,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:16:59,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 20:16:59,357 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 20:16:59,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:59,357 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 20:16:59,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:16:59,357 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 20:16:59,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:16:59,360 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:59,360 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] [2019-11-23 20:16:59,561 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:59,562 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:59,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:59,563 INFO L82 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2019-11-23 20:16:59,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:59,564 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671141212] [2019-11-23 20:16:59,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:59,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:16:59,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671141212] [2019-11-23 20:16:59,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473679155] [2019-11-23 20:16:59,665 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 20:16:59,713 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:16:59,714 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:59,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:16:59,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:16:59,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:59,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2019-11-23 20:16:59,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689044800] [2019-11-23 20:16:59,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:16:59,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:59,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:16:59,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:16:59,747 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2019-11-23 20:16:59,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:59,876 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-11-23 20:16:59,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:16:59,877 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-11-23 20:16:59,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:59,878 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:16:59,878 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:16:59,878 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 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 20:16:59,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:16:59,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2019-11-23 20:16:59,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:16:59,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-11-23 20:16:59,885 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2019-11-23 20:16:59,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:59,885 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-11-23 20:16:59,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:16:59,885 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-11-23 20:16:59,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:16:59,886 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:59,886 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-23 20:17:00,097 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:00,098 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:00,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:00,099 INFO L82 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2019-11-23 20:17:00,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:00,100 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602967059] [2019-11-23 20:17:00,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:17:01,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602967059] [2019-11-23 20:17:01,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137966021] [2019-11-23 20:17:01,207 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 20:17:01,265 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:17:01,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:01,268 WARN L253 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 52 conjunts are in the unsatisfiable core [2019-11-23 20:17:01,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:01,397 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 20:17:01,398 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:17:01,415 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:01,416 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:17:01,416 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:13 [2019-11-23 20:17:02,883 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:02,884 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 20:17:02,885 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 20:17:02,896 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:02,897 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:02,902 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 20:17:02,902 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:32 [2019-11-23 20:17:02,992 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:03,075 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:03,099 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:17:03,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:03,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29] total 46 [2019-11-23 20:17:03,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231675054] [2019-11-23 20:17:03,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-23 20:17:03,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:03,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-23 20:17:03,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1904, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:17:03,151 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 46 states. [2019-11-23 20:17:05,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:05,690 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2019-11-23 20:17:05,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:17:05,691 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 35 [2019-11-23 20:17:05,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:05,692 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:17:05,692 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:17:05,694 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=295, Invalid=3737, Unknown=0, NotChecked=0, Total=4032 [2019-11-23 20:17:05,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:17:05,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 53. [2019-11-23 20:17:05,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:17:05,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2019-11-23 20:17:05,703 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 35 [2019-11-23 20:17:05,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:05,704 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2019-11-23 20:17:05,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-23 20:17:05,704 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2019-11-23 20:17:05,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 20:17:05,705 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:05,706 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:17:05,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:05,917 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:05,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:05,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 4 times [2019-11-23 20:17:05,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:05,918 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659264505] [2019-11-23 20:17:05,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:05,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:17:06,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659264505] [2019-11-23 20:17:06,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184875179] [2019-11-23 20:17:06,002 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 20:17:06,049 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:17:06,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:06,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:17:06,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:17:06,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:06,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2019-11-23 20:17:06,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376544436] [2019-11-23 20:17:06,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:17:06,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:06,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:17:06,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:17:06,139 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 15 states. [2019-11-23 20:17:06,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:06,486 INFO L93 Difference]: Finished difference Result 138 states and 155 transitions. [2019-11-23 20:17:06,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:17:06,487 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2019-11-23 20:17:06,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:06,488 INFO L225 Difference]: With dead ends: 138 [2019-11-23 20:17:06,488 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:17:06,489 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:17:06,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:17:06,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2019-11-23 20:17:06,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:17:06,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2019-11-23 20:17:06,497 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 37 [2019-11-23 20:17:06,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:06,498 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2019-11-23 20:17:06,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:17:06,498 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2019-11-23 20:17:06,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:17:06,499 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:06,499 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:17:06,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:06,710 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:06,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:06,710 INFO L82 PathProgramCache]: Analyzing trace with hash -192826428, now seen corresponding path program 5 times [2019-11-23 20:17:06,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:06,711 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084333967] [2019-11-23 20:17:06,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-23 20:17:06,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084333967] [2019-11-23 20:17:06,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337618453] [2019-11-23 20:17:06,803 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 20:17:06,864 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:17:06,864 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:06,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:17:06,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-23 20:17:06,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:06,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2019-11-23 20:17:06,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402866245] [2019-11-23 20:17:06,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:17:06,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:06,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:17:06,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:17:06,956 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 15 states. [2019-11-23 20:17:07,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:07,228 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2019-11-23 20:17:07,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:17:07,228 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2019-11-23 20:17:07,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:07,229 INFO L225 Difference]: With dead ends: 66 [2019-11-23 20:17:07,229 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:17:07,230 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:17:07,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:17:07,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2019-11-23 20:17:07,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:17:07,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2019-11-23 20:17:07,236 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2019-11-23 20:17:07,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:07,237 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2019-11-23 20:17:07,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:17:07,237 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2019-11-23 20:17:07,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:17:07,238 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:07,238 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-23 20:17:07,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:07,440 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:07,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:07,441 INFO L82 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 6 times [2019-11-23 20:17:07,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:07,441 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003568812] [2019-11-23 20:17:07,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:17:10,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003568812] [2019-11-23 20:17:10,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802713923] [2019-11-23 20:17:10,932 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 20:17:10,992 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:17:10,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:10,995 WARN L253 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 66 conjunts are in the unsatisfiable core [2019-11-23 20:17:10,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:12,653 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:17:12,654 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:17:12,655 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:17:12,658 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:12,659 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 18 [2019-11-23 20:17:12,659 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:17:12,663 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:12,664 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:17:12,664 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:3 [2019-11-23 20:17:12,692 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:17:12,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:12,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33] total 65 [2019-11-23 20:17:12,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044276841] [2019-11-23 20:17:12,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-11-23 20:17:12,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:12,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-11-23 20:17:12,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=3702, Unknown=0, NotChecked=0, Total=4160 [2019-11-23 20:17:12,762 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 65 states. [2019-11-23 20:17:14,378 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2019-11-23 20:17:18,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:18,531 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2019-11-23 20:17:18,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-11-23 20:17:18,531 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 45 [2019-11-23 20:17:18,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:18,533 INFO L225 Difference]: With dead ends: 119 [2019-11-23 20:17:18,533 INFO L226 Difference]: Without dead ends: 113 [2019-11-23 20:17:18,537 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3578 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1202, Invalid=9510, Unknown=0, NotChecked=0, Total=10712 [2019-11-23 20:17:18,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-11-23 20:17:18,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 77. [2019-11-23 20:17:18,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 20:17:18,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2019-11-23 20:17:18,548 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 45 [2019-11-23 20:17:18,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:18,549 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2019-11-23 20:17:18,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-11-23 20:17:18,549 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2019-11-23 20:17:18,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:17:18,550 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:18,550 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:17:18,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:18,754 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:18,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:18,754 INFO L82 PathProgramCache]: Analyzing trace with hash -703050612, now seen corresponding path program 7 times [2019-11-23 20:17:18,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:18,754 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779070082] [2019-11-23 20:17:18,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-23 20:17:18,854 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779070082] [2019-11-23 20:17:18,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153478283] [2019-11-23 20:17:18,855 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 20:17:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:18,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:17:18,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-23 20:17:19,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:19,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2019-11-23 20:17:19,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671646209] [2019-11-23 20:17:19,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:17:19,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:19,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:17:19,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:17:19,017 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 19 states. [2019-11-23 20:17:19,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:19,448 INFO L93 Difference]: Finished difference Result 185 states and 204 transitions. [2019-11-23 20:17:19,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:17:19,448 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2019-11-23 20:17:19,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:19,449 INFO L225 Difference]: With dead ends: 185 [2019-11-23 20:17:19,449 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:17:19,451 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:17:19,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:17:19,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2019-11-23 20:17:19,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:17:19,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2019-11-23 20:17:19,463 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 47 [2019-11-23 20:17:19,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:19,463 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2019-11-23 20:17:19,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:17:19,463 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2019-11-23 20:17:19,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:17:19,464 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:19,464 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:17:19,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:19,677 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:19,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:19,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1992374766, now seen corresponding path program 8 times [2019-11-23 20:17:19,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:19,678 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840417141] [2019-11-23 20:17:19,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-23 20:17:19,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840417141] [2019-11-23 20:17:19,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239276680] [2019-11-23 20:17:19,759 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 20:17:19,819 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:17:19,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:19,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:17:19,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:19,931 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-23 20:17:19,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:19,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2019-11-23 20:17:19,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870091133] [2019-11-23 20:17:19,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:17:19,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:19,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:17:19,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:17:19,933 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 19 states. [2019-11-23 20:17:20,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:20,332 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2019-11-23 20:17:20,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:17:20,332 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2019-11-23 20:17:20,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:20,333 INFO L225 Difference]: With dead ends: 80 [2019-11-23 20:17:20,334 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:17:20,335 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:17:20,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:17:20,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2019-11-23 20:17:20,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:17:20,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2019-11-23 20:17:20,342 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2019-11-23 20:17:20,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:20,342 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2019-11-23 20:17:20,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:17:20,342 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2019-11-23 20:17:20,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:17:20,343 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:20,343 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-23 20:17:20,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:20,547 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:20,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:20,548 INFO L82 PathProgramCache]: Analyzing trace with hash -2047700076, now seen corresponding path program 9 times [2019-11-23 20:17:20,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:20,549 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288600363] [2019-11-23 20:17:20,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:21,338 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 25 [2019-11-23 20:17:21,469 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 29 [2019-11-23 20:17:21,597 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 27 [2019-11-23 20:17:21,746 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2019-11-23 20:17:21,894 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2019-11-23 20:17:22,198 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 37 [2019-11-23 20:17:22,364 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 33 [2019-11-23 20:17:22,530 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2019-11-23 20:17:22,702 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2019-11-23 20:17:22,865 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2019-11-23 20:17:23,023 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2019-11-23 20:17:23,182 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2019-11-23 20:17:23,492 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2019-11-23 20:17:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:17:25,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288600363] [2019-11-23 20:17:25,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225761618] [2019-11-23 20:17:25,804 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 20:17:25,866 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 20:17:25,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:25,868 WARN L253 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 84 conjunts are in the unsatisfiable core [2019-11-23 20:17:25,870 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:25,919 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 20:17:25,920 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:17:25,928 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:25,929 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:17:25,929 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2019-11-23 20:17:29,552 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:17:29,553 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:17:29,554 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:17:29,570 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:29,571 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51 [2019-11-23 20:17:29,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:29,573 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:29,574 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:29,575 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 20:17:29,613 INFO L567 ElimStorePlain]: treesize reduction 47, result has 40.5 percent of original size [2019-11-23 20:17:29,614 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:29,615 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 20:17:29,615 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:20 [2019-11-23 20:17:29,733 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:29,863 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:29,895 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:17:29,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:29,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 40] total 82 [2019-11-23 20:17:29,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153137705] [2019-11-23 20:17:29,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-11-23 20:17:29,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:29,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-11-23 20:17:29,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=6169, Unknown=0, NotChecked=0, Total=6642 [2019-11-23 20:17:29,991 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 82 states. [2019-11-23 20:17:32,733 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2019-11-23 20:17:33,779 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2019-11-23 20:17:35,972 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2019-11-23 20:17:39,970 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2019-11-23 20:17:44,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:44,470 INFO L93 Difference]: Finished difference Result 166 states and 180 transitions. [2019-11-23 20:17:44,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2019-11-23 20:17:44,470 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 55 [2019-11-23 20:17:44,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:44,472 INFO L225 Difference]: With dead ends: 166 [2019-11-23 20:17:44,473 INFO L226 Difference]: Without dead ends: 162 [2019-11-23 20:17:44,478 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6729 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=1719, Invalid=23087, Unknown=0, NotChecked=0, Total=24806 [2019-11-23 20:17:44,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-11-23 20:17:44,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 93. [2019-11-23 20:17:44,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-23 20:17:44,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2019-11-23 20:17:44,490 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 55 [2019-11-23 20:17:44,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:44,491 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2019-11-23 20:17:44,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-11-23 20:17:44,491 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2019-11-23 20:17:44,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:17:44,492 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:44,492 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:17:44,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:44,696 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:44,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:44,697 INFO L82 PathProgramCache]: Analyzing trace with hash -691517258, now seen corresponding path program 10 times [2019-11-23 20:17:44,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:44,698 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621027637] [2019-11-23 20:17:44,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:44,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:17:44,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621027637] [2019-11-23 20:17:44,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041885868] [2019-11-23 20:17:44,820 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 20:17:44,863 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:17:44,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:44,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:17:44,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:17:45,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:45,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2019-11-23 20:17:45,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955946782] [2019-11-23 20:17:45,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:17:45,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:45,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:17:45,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:17:45,008 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 23 states. [2019-11-23 20:17:45,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:45,565 INFO L93 Difference]: Finished difference Result 221 states and 240 transitions. [2019-11-23 20:17:45,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:17:45,566 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2019-11-23 20:17:45,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:45,567 INFO L225 Difference]: With dead ends: 221 [2019-11-23 20:17:45,567 INFO L226 Difference]: Without dead ends: 100 [2019-11-23 20:17:45,569 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:17:45,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-23 20:17:45,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2019-11-23 20:17:45,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:17:45,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2019-11-23 20:17:45,578 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 57 [2019-11-23 20:17:45,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:45,578 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2019-11-23 20:17:45,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:17:45,579 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2019-11-23 20:17:45,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:17:45,580 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:45,580 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:17:45,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:45,796 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:45,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:45,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1701588072, now seen corresponding path program 11 times [2019-11-23 20:17:45,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:45,797 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358201818] [2019-11-23 20:17:45,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:17:45,886 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358201818] [2019-11-23 20:17:45,886 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106006360] [2019-11-23 20:17:45,886 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 20:17:46,069 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:17:46,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:46,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:17:46,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:17:46,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:46,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2019-11-23 20:17:46,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439331902] [2019-11-23 20:17:46,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:17:46,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:46,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:17:46,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:17:46,150 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 19 states. [2019-11-23 20:17:46,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:46,490 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2019-11-23 20:17:46,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:17:46,490 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2019-11-23 20:17:46,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:46,491 INFO L225 Difference]: With dead ends: 93 [2019-11-23 20:17:46,492 INFO L226 Difference]: Without dead ends: 69 [2019-11-23 20:17:46,493 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:17:46,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-23 20:17:46,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2019-11-23 20:17:46,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:17:46,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 20:17:46,499 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2019-11-23 20:17:46,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:46,499 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 20:17:46,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:17:46,499 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 20:17:46,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:17:46,500 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:46,500 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-23 20:17:46,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:46,704 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:46,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:46,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1079638594, now seen corresponding path program 12 times [2019-11-23 20:17:46,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:46,705 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273172780] [2019-11-23 20:17:46,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:47,593 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 21 [2019-11-23 20:17:47,755 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 36 [2019-11-23 20:17:47,911 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 32 [2019-11-23 20:17:48,084 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 39 [2019-11-23 20:17:48,253 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 33 [2019-11-23 20:17:48,417 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 39 [2019-11-23 20:17:48,587 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 35 [2019-11-23 20:17:48,742 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2019-11-23 20:17:48,907 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 35 [2019-11-23 20:17:49,063 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2019-11-23 20:17:49,194 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2019-11-23 20:17:49,338 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2019-11-23 20:17:49,481 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 34 [2019-11-23 20:17:49,652 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2019-11-23 20:17:49,832 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2019-11-23 20:17:50,014 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2019-11-23 20:17:50,208 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2019-11-23 20:17:50,388 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2019-11-23 20:17:50,583 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2019-11-23 20:17:50,768 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2019-11-23 20:17:51,119 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 41 [2019-11-23 20:17:51,328 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 38 [2019-11-23 20:17:51,515 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2019-11-23 20:17:51,696 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2019-11-23 20:17:51,884 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2019-11-23 20:17:52,072 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2019-11-23 20:17:52,261 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2019-11-23 20:17:54,655 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:17:54,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273172780] [2019-11-23 20:17:54,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971036323] [2019-11-23 20:17:54,656 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:54,729 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-23 20:17:54,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:54,731 WARN L253 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 100 conjunts are in the unsatisfiable core [2019-11-23 20:17:54,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:54,787 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 20:17:54,788 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:17:54,795 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:54,796 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:17:54,796 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2019-11-23 20:17:54,800 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 20:17:54,800 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:17:54,810 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:54,810 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:17:54,811 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2019-11-23 20:18:00,536 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:18:00,536 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 20:18:00,537 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 20:18:00,552 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:18:00,553 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:18:00,554 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 20:18:00,555 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:21 [2019-11-23 20:18:00,670 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:18:00,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:18:00,841 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:18:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 9 proven. 100 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:18:00,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:00,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 48] total 101 [2019-11-23 20:18:00,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592170310] [2019-11-23 20:18:00,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 101 states [2019-11-23 20:18:00,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:00,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2019-11-23 20:18:00,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=620, Invalid=9480, Unknown=0, NotChecked=0, Total=10100 [2019-11-23 20:18:00,963 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 101 states. [2019-11-23 20:18:04,523 WARN L192 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2019-11-23 20:18:04,979 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 73 [2019-11-23 20:18:05,361 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2019-11-23 20:18:06,161 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 65 [2019-11-23 20:18:06,661 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 68 [2019-11-23 20:18:07,328 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 77 [2019-11-23 20:18:08,135 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 75 [2019-11-23 20:18:08,448 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 65 [2019-11-23 20:18:11,129 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2019-11-23 20:18:12,083 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 73 [2019-11-23 20:18:12,614 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 57 [2019-11-23 20:18:13,834 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 76 [2019-11-23 20:18:15,567 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2019-11-23 20:18:16,118 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2019-11-23 20:18:16,492 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2019-11-23 20:18:18,120 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 66 [2019-11-23 20:18:23,047 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 49 [2019-11-23 20:18:23,392 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2019-11-23 20:18:23,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:23,413 INFO L93 Difference]: Finished difference Result 200 states and 215 transitions. [2019-11-23 20:18:23,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2019-11-23 20:18:23,414 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 65 [2019-11-23 20:18:23,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:23,415 INFO L225 Difference]: With dead ends: 200 [2019-11-23 20:18:23,416 INFO L226 Difference]: Without dead ends: 196 [2019-11-23 20:18:23,419 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 19 SyntacticMatches, 7 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10805 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=2359, Invalid=34697, Unknown=0, NotChecked=0, Total=37056 [2019-11-23 20:18:23,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-11-23 20:18:23,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 121. [2019-11-23 20:18:23,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-23 20:18:23,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2019-11-23 20:18:23,431 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 65 [2019-11-23 20:18:23,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:23,431 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2019-11-23 20:18:23,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 101 states. [2019-11-23 20:18:23,432 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2019-11-23 20:18:23,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 20:18:23,432 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:23,432 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:23,635 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:23,635 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:23,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:23,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1902631008, now seen corresponding path program 13 times [2019-11-23 20:18:23,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:23,636 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891728304] [2019-11-23 20:18:23,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-23 20:18:23,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891728304] [2019-11-23 20:18:23,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156044683] [2019-11-23 20:18:23,759 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:23,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:18:23,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-23 20:18:24,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:24,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2019-11-23 20:18:24,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238195416] [2019-11-23 20:18:24,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:18:24,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:24,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:18:24,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:18:24,002 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand 27 states. [2019-11-23 20:18:24,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:24,727 INFO L93 Difference]: Finished difference Result 257 states and 276 transitions. [2019-11-23 20:18:24,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:18:24,727 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 67 [2019-11-23 20:18:24,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:24,728 INFO L225 Difference]: With dead ends: 257 [2019-11-23 20:18:24,728 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 20:18:24,729 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=308, Invalid=1252, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:18:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 20:18:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 98. [2019-11-23 20:18:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-23 20:18:24,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2019-11-23 20:18:24,740 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 67 [2019-11-23 20:18:24,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:24,740 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2019-11-23 20:18:24,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:18:24,741 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2019-11-23 20:18:24,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:18:24,741 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:24,742 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:24,945 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:24,946 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:24,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:24,946 INFO L82 PathProgramCache]: Analyzing trace with hash 2014257346, now seen corresponding path program 14 times [2019-11-23 20:18:24,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:24,947 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924241814] [2019-11-23 20:18:24,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:24,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-11-23 20:18:25,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924241814] [2019-11-23 20:18:25,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015424883] [2019-11-23 20:18:25,058 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:25,124 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:18:25,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:25,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:18:25,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-11-23 20:18:25,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:25,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2019-11-23 20:18:25,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201098985] [2019-11-23 20:18:25,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:18:25,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:25,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:18:25,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:18:25,311 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand 27 states. [2019-11-23 20:18:25,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:25,905 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2019-11-23 20:18:25,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:18:25,905 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 69 [2019-11-23 20:18:25,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:25,906 INFO L225 Difference]: With dead ends: 108 [2019-11-23 20:18:25,906 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:18:25,907 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=301, Invalid=959, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:18:25,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:18:25,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2019-11-23 20:18:25,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-23 20:18:25,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2019-11-23 20:18:25,915 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 69 [2019-11-23 20:18:25,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:25,915 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2019-11-23 20:18:25,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:18:25,915 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2019-11-23 20:18:25,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:18:25,916 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:25,916 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:26,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:26,122 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:26,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:26,122 INFO L82 PathProgramCache]: Analyzing trace with hash 209029992, now seen corresponding path program 15 times [2019-11-23 20:18:26,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:26,123 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659071076] [2019-11-23 20:18:26,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:27,254 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 21 [2019-11-23 20:18:27,427 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 28 [2019-11-23 20:18:27,609 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 32 [2019-11-23 20:18:27,807 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 32 [2019-11-23 20:18:28,039 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 34 [2019-11-23 20:18:28,250 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 33 [2019-11-23 20:18:28,468 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 36 [2019-11-23 20:18:28,689 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 39 [2019-11-23 20:18:28,905 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 41 [2019-11-23 20:18:29,122 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 38 [2019-11-23 20:18:29,313 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 35 [2019-11-23 20:18:29,554 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 42 [2019-11-23 20:18:29,778 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 38 [2019-11-23 20:18:30,020 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 48 [2019-11-23 20:18:30,259 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2019-11-23 20:18:30,508 WARN L192 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 51 [2019-11-23 20:18:30,742 WARN L192 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2019-11-23 20:18:30,983 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2019-11-23 20:18:31,250 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2019-11-23 20:18:31,511 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2019-11-23 20:18:31,761 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2019-11-23 20:18:31,999 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2019-11-23 20:18:32,232 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2019-11-23 20:18:32,473 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2019-11-23 20:18:32,684 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-11-23 20:18:32,900 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 46 [2019-11-23 20:18:33,121 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 42 [2019-11-23 20:18:33,364 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2019-11-23 20:18:33,600 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2019-11-23 20:18:33,868 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2019-11-23 20:18:34,091 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2019-11-23 20:18:34,346 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2019-11-23 20:18:34,580 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2019-11-23 20:18:34,798 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2019-11-23 20:18:35,025 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2019-11-23 20:18:35,230 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2019-11-23 20:18:35,614 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39