/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-industry-pattern/array_shadowinit.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:38:42,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:38:42,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:38:42,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:38:42,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:38:42,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:38:42,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:38:42,350 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:38:42,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:38:42,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:38:42,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:38:42,360 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:38:42,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:38:42,362 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:38:42,364 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:38:42,366 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:38:42,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:38:42,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:38:42,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:38:42,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:38:42,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:38:42,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:38:42,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:38:42,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:38:42,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:38:42,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:38:42,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:38:42,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:38:42,402 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 20:38:42,433 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:38:42,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:38:42,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:38:42,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:38:42,438 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:38:42,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:38:42,439 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:38:42,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:38:42,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:38:42,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:38:42,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:38:42,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:38:42,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:38:42,440 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:38:42,440 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:38:42,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:38:42,440 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:38:42,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:38:42,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:38:42,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:38:42,442 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:38:42,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:38:42,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:38:42,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:38:42,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:38:42,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:38:42,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:38:42,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:38:42,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:38:42,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:38:42,709 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:38:42,728 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:38:42,732 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:38:42,733 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:38:42,734 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:38:42,735 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_shadowinit.i [2019-11-23 20:38:42,803 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44ac53f2c/fe63011c3f934e2f972019e31f4b8120/FLAG7e77da180 [2019-11-23 20:38:43,231 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:38:43,232 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_shadowinit.i [2019-11-23 20:38:43,238 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44ac53f2c/fe63011c3f934e2f972019e31f4b8120/FLAG7e77da180 [2019-11-23 20:38:43,629 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44ac53f2c/fe63011c3f934e2f972019e31f4b8120 [2019-11-23 20:38:43,637 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:38:43,639 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:38:43,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:38:43,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:38:43,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:38:43,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:38:43" (1/1) ... [2019-11-23 20:38:43,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c34bdf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:43, skipping insertion in model container [2019-11-23 20:38:43,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:38:43" (1/1) ... [2019-11-23 20:38:43,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:38:43,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:38:43,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:38:43,862 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:38:43,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:38:43,899 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:38:43,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:43 WrapperNode [2019-11-23 20:38:43,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:38:43,901 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:38:43,901 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:38:43,901 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:38:43,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:43" (1/1) ... [2019-11-23 20:38:44,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:43" (1/1) ... [2019-11-23 20:38:44,019 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:38:44,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:38:44,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:38:44,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:38:44,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:43" (1/1) ... [2019-11-23 20:38:44,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:43" (1/1) ... [2019-11-23 20:38:44,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:43" (1/1) ... [2019-11-23 20:38:44,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:43" (1/1) ... [2019-11-23 20:38:44,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:43" (1/1) ... [2019-11-23 20:38:44,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:43" (1/1) ... [2019-11-23 20:38:44,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:43" (1/1) ... [2019-11-23 20:38:44,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:38:44,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:38:44,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:38:44,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:38:44,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:43" (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 20:38:44,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:38:44,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:38:44,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:38:44,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:38:44,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:38:44,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:38:44,316 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:38:44,317 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-23 20:38:44,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:44 BoogieIcfgContainer [2019-11-23 20:38:44,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:38:44,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:38:44,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:38:44,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:38:44,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:38:43" (1/3) ... [2019-11-23 20:38:44,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c129bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:44, skipping insertion in model container [2019-11-23 20:38:44,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:43" (2/3) ... [2019-11-23 20:38:44,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c129bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:44, skipping insertion in model container [2019-11-23 20:38:44,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:44" (3/3) ... [2019-11-23 20:38:44,328 INFO L109 eAbstractionObserver]: Analyzing ICFG array_shadowinit.i [2019-11-23 20:38:44,343 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:38:44,355 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:38:44,383 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:38:44,410 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:38:44,410 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:38:44,411 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:38:44,411 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:38:44,411 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:38:44,411 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:38:44,411 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:38:44,411 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:38:44,427 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-23 20:38:44,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 20:38:44,436 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:44,437 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:44,437 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:44,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:44,443 INFO L82 PathProgramCache]: Analyzing trace with hash 126038137, now seen corresponding path program 1 times [2019-11-23 20:38:44,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:44,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668304061] [2019-11-23 20:38:44,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:44,573 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 20:38:44,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668304061] [2019-11-23 20:38:44,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:38:44,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:38:44,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744310029] [2019-11-23 20:38:44,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:38:44,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:44,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:38:44,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:38:44,598 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2019-11-23 20:38:44,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:44,613 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2019-11-23 20:38:44,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:38:44,615 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-23 20:38:44,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:44,623 INFO L225 Difference]: With dead ends: 26 [2019-11-23 20:38:44,623 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 20:38:44,625 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 20:38:44,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 20:38:44,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 20:38:44,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 20:38:44,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-11-23 20:38:44,655 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2019-11-23 20:38:44,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:44,656 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-11-23 20:38:44,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:38:44,656 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2019-11-23 20:38:44,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 20:38:44,657 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:44,657 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:44,657 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:44,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:44,658 INFO L82 PathProgramCache]: Analyzing trace with hash 122344053, now seen corresponding path program 1 times [2019-11-23 20:38:44,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:44,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868708328] [2019-11-23 20:38:44,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:44,722 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 20:38:44,722 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868708328] [2019-11-23 20:38:44,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:38:44,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:38:44,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425304718] [2019-11-23 20:38:44,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:38:44,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:44,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:38:44,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:38:44,726 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2019-11-23 20:38:44,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:44,763 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2019-11-23 20:38:44,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:38:44,764 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 20:38:44,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:44,765 INFO L225 Difference]: With dead ends: 17 [2019-11-23 20:38:44,765 INFO L226 Difference]: Without dead ends: 11 [2019-11-23 20:38:44,766 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 20:38:44,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-23 20:38:44,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-23 20:38:44,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 20:38:44,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-11-23 20:38:44,770 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2019-11-23 20:38:44,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:44,771 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-11-23 20:38:44,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:38:44,771 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-11-23 20:38:44,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:38:44,772 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:44,772 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:44,773 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:44,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:44,773 INFO L82 PathProgramCache]: Analyzing trace with hash -450855509, now seen corresponding path program 1 times [2019-11-23 20:38:44,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:44,774 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434075490] [2019-11-23 20:38:44,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:44,979 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434075490] [2019-11-23 20:38:44,979 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462692620] [2019-11-23 20:38:44,979 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 20:38:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:45,038 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:38:45,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:45,124 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 11 treesize of output 7 [2019-11-23 20:38:45,125 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:38:45,139 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:38:45,140 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:38:45,141 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-23 20:38:45,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:38:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:45,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:45,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:38:45,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005609363] [2019-11-23 20:38:45,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:38:45,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:45,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:38:45,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:38:45,184 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2019-11-23 20:38:45,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:45,294 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2019-11-23 20:38:45,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:38:45,295 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-23 20:38:45,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:45,296 INFO L225 Difference]: With dead ends: 17 [2019-11-23 20:38:45,296 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 20:38:45,297 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:38:45,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 20:38:45,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2019-11-23 20:38:45,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 20:38:45,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-23 20:38:45,302 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2019-11-23 20:38:45,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:45,302 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-23 20:38:45,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:38:45,303 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-23 20:38:45,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:38:45,303 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:45,303 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:45,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:45,507 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:45,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:45,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1068940558, now seen corresponding path program 1 times [2019-11-23 20:38:45,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:45,509 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395479296] [2019-11-23 20:38:45,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:45,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395479296] [2019-11-23 20:38:45,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098757313] [2019-11-23 20:38:45,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:45,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:38:45,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:45,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:45,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-23 20:38:45,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847592147] [2019-11-23 20:38:45,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:38:45,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:45,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:38:45,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:38:45,715 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2019-11-23 20:38:45,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:45,828 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-11-23 20:38:45,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:38:45,829 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2019-11-23 20:38:45,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:45,830 INFO L225 Difference]: With dead ends: 30 [2019-11-23 20:38:45,832 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:38:45,833 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:38:45,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:38:45,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2019-11-23 20:38:45,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 20:38:45,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-23 20:38:45,839 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2019-11-23 20:38:45,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:45,840 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-23 20:38:45,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:38:45,840 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-23 20:38:45,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:38:45,841 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:45,841 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:46,043 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:46,045 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:46,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:46,045 INFO L82 PathProgramCache]: Analyzing trace with hash 407528232, now seen corresponding path program 2 times [2019-11-23 20:38:46,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:46,046 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319927314] [2019-11-23 20:38:46,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:46,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319927314] [2019-11-23 20:38:46,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485622975] [2019-11-23 20:38:46,248 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 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 20:38:46,282 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:38:46,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:46,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:38:46,285 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:46,328 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 13 treesize of output 9 [2019-11-23 20:38:46,329 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:38:46,333 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:38:46,333 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:38:46,334 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-23 20:38:46,453 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:38:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:46,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:46,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2019-11-23 20:38:46,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784806888] [2019-11-23 20:38:46,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:38:46,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:46,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:38:46,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:38:46,476 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 15 states. [2019-11-23 20:38:46,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:46,651 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-23 20:38:46,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:38:46,652 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2019-11-23 20:38:46,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:46,652 INFO L225 Difference]: With dead ends: 21 [2019-11-23 20:38:46,653 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 20:38:46,653 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:38:46,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 20:38:46,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-11-23 20:38:46,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 20:38:46,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-23 20:38:46,658 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2019-11-23 20:38:46,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:46,659 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-23 20:38:46,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:38:46,659 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-23 20:38:46,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:38:46,659 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:46,660 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:46,869 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:46,870 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:46,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:46,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1194192811, now seen corresponding path program 3 times [2019-11-23 20:38:46,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:46,871 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438091784] [2019-11-23 20:38:46,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:46,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:46,966 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438091784] [2019-11-23 20:38:46,966 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025931721] [2019-11-23 20:38:46,967 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 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 20:38:47,014 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:38:47,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:47,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:38:47,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:47,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:47,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-23 20:38:47,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307223041] [2019-11-23 20:38:47,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:38:47,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:47,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:38:47,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:38:47,099 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 13 states. [2019-11-23 20:38:47,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:47,225 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2019-11-23 20:38:47,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:38:47,226 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-11-23 20:38:47,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:47,227 INFO L225 Difference]: With dead ends: 37 [2019-11-23 20:38:47,227 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 20:38:47,228 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:38:47,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 20:38:47,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2019-11-23 20:38:47,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 20:38:47,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-23 20:38:47,233 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2019-11-23 20:38:47,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:47,233 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-23 20:38:47,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:38:47,233 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-23 20:38:47,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:38:47,234 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:47,235 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:47,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:47,436 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:47,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:47,437 INFO L82 PathProgramCache]: Analyzing trace with hash -298048117, now seen corresponding path program 4 times [2019-11-23 20:38:47,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:47,439 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537495733] [2019-11-23 20:38:47,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:47,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537495733] [2019-11-23 20:38:47,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144237064] [2019-11-23 20:38:47,603 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 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 20:38:47,651 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:38:47,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:47,653 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:38:47,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:47,722 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 13 treesize of output 9 [2019-11-23 20:38:47,723 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:38:47,731 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:38:47,732 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:38:47,732 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-23 20:38:47,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:38:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:47,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:47,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-11-23 20:38:47,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436283644] [2019-11-23 20:38:47,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:38:47,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:47,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:38:47,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:38:47,840 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 18 states. [2019-11-23 20:38:48,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:48,101 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2019-11-23 20:38:48,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:38:48,103 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2019-11-23 20:38:48,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:48,104 INFO L225 Difference]: With dead ends: 25 [2019-11-23 20:38:48,104 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 20:38:48,104 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:38:48,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 20:38:48,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2019-11-23 20:38:48,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:38:48,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-11-23 20:38:48,109 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2019-11-23 20:38:48,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:48,110 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-11-23 20:38:48,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:38:48,110 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-11-23 20:38:48,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:38:48,111 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:48,111 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:48,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:48,315 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:48,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:48,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1449259246, now seen corresponding path program 5 times [2019-11-23 20:38:48,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:48,316 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135223825] [2019-11-23 20:38:48,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:48,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135223825] [2019-11-23 20:38:48,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050511754] [2019-11-23 20:38:48,413 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 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 20:38:48,453 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:38:48,453 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:48,454 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:38:48,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:48,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:48,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-11-23 20:38:48,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682536456] [2019-11-23 20:38:48,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:38:48,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:48,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:38:48,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:38:48,525 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 16 states. [2019-11-23 20:38:48,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:48,657 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2019-11-23 20:38:48,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:38:48,658 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2019-11-23 20:38:48,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:48,658 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:38:48,658 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:38:48,659 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:38:48,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:38:48,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2019-11-23 20:38:48,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 20:38:48,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-11-23 20:38:48,664 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2019-11-23 20:38:48,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:48,665 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-11-23 20:38:48,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:38:48,665 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-11-23 20:38:48,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:38:48,665 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:48,666 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:48,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:48,869 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:48,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:48,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1156487496, now seen corresponding path program 6 times [2019-11-23 20:38:48,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:48,871 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222418310] [2019-11-23 20:38:48,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:49,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222418310] [2019-11-23 20:38:49,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262766692] [2019-11-23 20:38:49,046 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 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 20:38:49,098 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:38:49,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:49,099 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 20:38:49,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:49,195 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 13 treesize of output 9 [2019-11-23 20:38:49,196 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:38:49,202 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:38:49,202 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:38:49,202 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2019-11-23 20:38:49,404 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:38:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:49,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:49,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2019-11-23 20:38:49,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551409550] [2019-11-23 20:38:49,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:38:49,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:49,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:38:49,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:38:49,429 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 24 states. [2019-11-23 20:38:50,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:50,421 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2019-11-23 20:38:50,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:38:50,422 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 21 [2019-11-23 20:38:50,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:50,423 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:38:50,423 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:38:50,427 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=287, Invalid=1693, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:38:50,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:38:50,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-23 20:38:50,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:38:50,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-23 20:38:50,433 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2019-11-23 20:38:50,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:50,433 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-23 20:38:50,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:38:50,433 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-23 20:38:50,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:38:50,434 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:50,434 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:50,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:50,635 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:50,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:50,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1052957333, now seen corresponding path program 7 times [2019-11-23 20:38:50,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:50,636 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596149520] [2019-11-23 20:38:50,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:50,966 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596149520] [2019-11-23 20:38:50,966 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003229076] [2019-11-23 20:38:50,967 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 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 20:38:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:51,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 20:38:51,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:51,105 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 13 treesize of output 9 [2019-11-23 20:38:51,106 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:38:51,109 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:38:51,109 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:38:51,109 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-23 20:38:51,286 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:38:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:51,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:51,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2019-11-23 20:38:51,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461461052] [2019-11-23 20:38:51,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:38:51,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:51,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:38:51,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:38:51,313 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 26 states. [2019-11-23 20:38:51,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:51,769 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-23 20:38:51,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:38:51,769 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2019-11-23 20:38:51,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:51,770 INFO L225 Difference]: With dead ends: 33 [2019-11-23 20:38:51,771 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:38:51,772 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:38:51,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:38:51,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-11-23 20:38:51,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:38:51,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-23 20:38:51,778 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2019-11-23 20:38:51,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:51,779 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-23 20:38:51,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:38:51,779 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-23 20:38:51,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 20:38:51,780 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:51,780 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:51,983 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:51,983 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:51,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:51,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1794016050, now seen corresponding path program 8 times [2019-11-23 20:38:51,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:51,985 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5822914] [2019-11-23 20:38:51,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:52,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5822914] [2019-11-23 20:38:52,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684604123] [2019-11-23 20:38:52,122 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 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 20:38:52,155 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:38:52,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:52,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:38:52,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:52,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:52,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2019-11-23 20:38:52,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567481897] [2019-11-23 20:38:52,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:38:52,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:52,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:38:52,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:38:52,291 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 22 states. [2019-11-23 20:38:52,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:52,439 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2019-11-23 20:38:52,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:38:52,440 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2019-11-23 20:38:52,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:52,440 INFO L225 Difference]: With dead ends: 58 [2019-11-23 20:38:52,440 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:38:52,442 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:38:52,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:38:52,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2019-11-23 20:38:52,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:38:52,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-11-23 20:38:52,451 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2019-11-23 20:38:52,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:52,452 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-11-23 20:38:52,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:38:52,452 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-11-23 20:38:52,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:38:52,453 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:52,453 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:52,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:52,657 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:52,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:52,657 INFO L82 PathProgramCache]: Analyzing trace with hash -528189592, now seen corresponding path program 9 times [2019-11-23 20:38:52,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:52,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300147833] [2019-11-23 20:38:52,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:52,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300147833] [2019-11-23 20:38:52,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418219043] [2019-11-23 20:38:52,911 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 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 20:38:52,963 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:38:52,963 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:52,965 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 49 conjunts are in the unsatisfiable core [2019-11-23 20:38:52,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:53,114 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 13 treesize of output 9 [2019-11-23 20:38:53,114 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:38:53,118 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:38:53,119 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:38:53,119 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2019-11-23 20:38:53,422 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:38:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:53,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:53,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2019-11-23 20:38:53,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186038275] [2019-11-23 20:38:53,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:38:53,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:53,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:38:53,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:38:53,452 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 32 states. [2019-11-23 20:38:54,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:54,562 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2019-11-23 20:38:54,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:38:54,563 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 29 [2019-11-23 20:38:54,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:54,564 INFO L225 Difference]: With dead ends: 63 [2019-11-23 20:38:54,564 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:38:54,566 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=340, Invalid=2852, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 20:38:54,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:38:54,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 33. [2019-11-23 20:38:54,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:38:54,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2019-11-23 20:38:54,572 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2019-11-23 20:38:54,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:54,573 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2019-11-23 20:38:54,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:38:54,573 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2019-11-23 20:38:54,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 20:38:54,574 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:54,574 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:54,777 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:54,778 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:54,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:54,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1468830741, now seen corresponding path program 10 times [2019-11-23 20:38:54,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:54,779 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686910831] [2019-11-23 20:38:54,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:54,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686910831] [2019-11-23 20:38:54,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166738654] [2019-11-23 20:38:54,916 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 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 20:38:54,962 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:38:54,963 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:54,964 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:38:54,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:55,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:55,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2019-11-23 20:38:55,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673013853] [2019-11-23 20:38:55,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:38:55,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:55,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:38:55,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:38:55,093 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 25 states. [2019-11-23 20:38:55,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:55,301 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2019-11-23 20:38:55,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:38:55,301 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-11-23 20:38:55,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:55,302 INFO L225 Difference]: With dead ends: 65 [2019-11-23 20:38:55,302 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:38:55,302 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:38:55,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:38:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2019-11-23 20:38:55,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:38:55,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2019-11-23 20:38:55,308 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2019-11-23 20:38:55,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:55,308 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2019-11-23 20:38:55,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:38:55,308 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2019-11-23 20:38:55,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:38:55,309 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:55,309 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:55,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:55,514 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:55,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:55,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1812036939, now seen corresponding path program 11 times [2019-11-23 20:38:55,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:55,516 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358213716] [2019-11-23 20:38:55,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:55,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358213716] [2019-11-23 20:38:55,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374009277] [2019-11-23 20:38:55,893 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 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 20:38:55,951 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-23 20:38:55,951 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:55,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 53 conjunts are in the unsatisfiable core [2019-11-23 20:38:55,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:56,116 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 13 treesize of output 9 [2019-11-23 20:38:56,117 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:38:56,121 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:38:56,122 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:38:56,122 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-23 20:38:56,360 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:38:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:56,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:56,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2019-11-23 20:38:56,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370843946] [2019-11-23 20:38:56,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 20:38:56,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:56,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 20:38:56,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:38:56,392 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 34 states. [2019-11-23 20:38:57,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:57,121 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2019-11-23 20:38:57,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:38:57,121 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2019-11-23 20:38:57,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:57,122 INFO L225 Difference]: With dead ends: 41 [2019-11-23 20:38:57,122 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 20:38:57,123 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=175, Invalid=1717, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:38:57,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 20:38:57,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-11-23 20:38:57,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 20:38:57,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2019-11-23 20:38:57,129 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 33 [2019-11-23 20:38:57,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:57,130 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2019-11-23 20:38:57,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 20:38:57,130 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2019-11-23 20:38:57,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 20:38:57,131 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:57,131 INFO L410 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:57,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:57,337 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:57,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:57,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1046700206, now seen corresponding path program 12 times [2019-11-23 20:38:57,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:57,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390840300] [2019-11-23 20:38:57,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:57,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390840300] [2019-11-23 20:38:57,511 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770004699] [2019-11-23 20:38:57,511 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 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 20:38:57,586 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-11-23 20:38:57,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:57,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:38:57,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:57,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:57,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2019-11-23 20:38:57,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41983669] [2019-11-23 20:38:57,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:38:57,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:57,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:38:57,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:38:57,757 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 28 states. [2019-11-23 20:38:57,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:57,998 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2019-11-23 20:38:57,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:38:57,999 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2019-11-23 20:38:57,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:57,999 INFO L225 Difference]: With dead ends: 72 [2019-11-23 20:38:57,999 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 20:38:58,000 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=951, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:38:58,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 20:38:58,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2019-11-23 20:38:58,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:38:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-23 20:38:58,011 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2019-11-23 20:38:58,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:58,011 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-23 20:38:58,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:38:58,012 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-23 20:38:58,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 20:38:58,012 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:58,012 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:58,216 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:58,216 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:58,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:58,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1382940040, now seen corresponding path program 13 times [2019-11-23 20:38:58,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:58,217 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849611379] [2019-11-23 20:38:58,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:58,550 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:58,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849611379] [2019-11-23 20:38:58,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068304689] [2019-11-23 20:38:58,550 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 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 20:38:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:58,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 59 conjunts are in the unsatisfiable core [2019-11-23 20:38:58,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:58,816 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 13 treesize of output 9 [2019-11-23 20:38:58,817 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:38:58,822 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:38:58,822 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:38:58,822 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-23 20:38:59,115 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:38:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:59,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:59,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2019-11-23 20:38:59,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686578257] [2019-11-23 20:38:59,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:38:59,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:59,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:38:59,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:38:59,156 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 38 states. [2019-11-23 20:38:59,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:59,944 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-23 20:38:59,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:38:59,945 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2019-11-23 20:38:59,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:59,945 INFO L225 Difference]: With dead ends: 45 [2019-11-23 20:38:59,946 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 20:38:59,947 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=195, Invalid=2157, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:38:59,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 20:38:59,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2019-11-23 20:38:59,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 20:38:59,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-23 20:38:59,953 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2019-11-23 20:38:59,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:59,954 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-23 20:38:59,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:38:59,954 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-23 20:38:59,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 20:38:59,955 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:59,955 INFO L410 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:00,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:00,158 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:00,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:00,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1845221877, now seen corresponding path program 14 times [2019-11-23 20:39:00,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:00,160 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240057392] [2019-11-23 20:39:00,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:00,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240057392] [2019-11-23 20:39:00,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048143974] [2019-11-23 20:39:00,345 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:00,392 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:39:00,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:00,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:39:00,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:00,567 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:00,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:00,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2019-11-23 20:39:00,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472020839] [2019-11-23 20:39:00,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:39:00,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:00,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:39:00,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:39:00,569 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 31 states. [2019-11-23 20:39:00,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:00,826 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2019-11-23 20:39:00,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:39:00,828 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 40 [2019-11-23 20:39:00,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:00,829 INFO L225 Difference]: With dead ends: 79 [2019-11-23 20:39:00,829 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 20:39:00,830 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:39:00,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 20:39:00,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2019-11-23 20:39:00,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:39:00,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-11-23 20:39:00,836 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2019-11-23 20:39:00,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:00,839 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-11-23 20:39:00,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:39:00,839 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-11-23 20:39:00,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:39:00,840 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:00,840 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:01,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:01,041 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:01,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:01,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1575431467, now seen corresponding path program 15 times [2019-11-23 20:39:01,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:01,042 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386845645] [2019-11-23 20:39:01,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:01,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386845645] [2019-11-23 20:39:01,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414000935] [2019-11-23 20:39:01,429 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:01,530 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:39:01,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:01,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 66 conjunts are in the unsatisfiable core [2019-11-23 20:39:01,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:01,623 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 13 treesize of output 9 [2019-11-23 20:39:01,623 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:39:01,630 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:01,630 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:39:01,630 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2019-11-23 20:39:01,674 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,675 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2019-11-23 20:39:01,675 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:39:01,682 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:01,683 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:39:01,683 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2019-11-23 20:39:01,727 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,728 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,729 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,731 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:01,732 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2019-11-23 20:39:01,732 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:39:01,742 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:01,743 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:39:01,743 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2019-11-23 20:39:01,816 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,817 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,818 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,819 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,820 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,821 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,822 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:01,823 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 46 [2019-11-23 20:39:01,823 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:39:01,835 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:01,835 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:39:01,836 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:43 [2019-11-23 20:39:01,894 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,898 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,901 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,902 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,904 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,905 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,906 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,907 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,907 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,908 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,909 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:01,910 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 58 [2019-11-23 20:39:01,911 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:39:01,922 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:01,923 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:39:01,923 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:52 [2019-11-23 20:39:01,989 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,990 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,992 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,993 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,995 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,996 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,997 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,998 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:01,999 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,000 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,001 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,002 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,003 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,004 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,005 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,006 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:02,006 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 75 [2019-11-23 20:39:02,007 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:39:02,025 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:02,025 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:39:02,025 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:66 [2019-11-23 20:39:02,099 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,100 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,101 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,103 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,105 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,106 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,107 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,107 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,108 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,109 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,109 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,110 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,111 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,111 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,112 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,113 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,114 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,115 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,116 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,118 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,119 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:02,120 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:02,120 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 82 [2019-11-23 20:39:02,122 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:39:02,145 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:02,146 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:39:02,146 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:67 [2019-11-23 20:39:02,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:39:03,034 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:03,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:03,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2019-11-23 20:39:03,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372067555] [2019-11-23 20:39:03,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:39:03,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:03,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:39:03,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1639, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:39:03,036 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 43 states. [2019-11-23 20:39:04,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:04,275 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2019-11-23 20:39:04,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:39:04,275 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 41 [2019-11-23 20:39:04,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:04,276 INFO L225 Difference]: With dead ends: 49 [2019-11-23 20:39:04,276 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 20:39:04,277 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=299, Invalid=2563, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 20:39:04,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 20:39:04,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-11-23 20:39:04,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 20:39:04,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2019-11-23 20:39:04,284 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2019-11-23 20:39:04,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:04,284 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2019-11-23 20:39:04,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:39:04,284 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2019-11-23 20:39:04,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 20:39:04,285 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:04,285 INFO L410 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:04,486 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:04,486 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:04,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:04,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1718983822, now seen corresponding path program 16 times [2019-11-23 20:39:04,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:04,487 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941030793] [2019-11-23 20:39:04,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:04,701 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:04,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941030793] [2019-11-23 20:39:04,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780237584] [2019-11-23 20:39:04,702 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:04,750 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:39:04,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:04,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:39:04,753 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:05,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:05,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2019-11-23 20:39:05,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317297723] [2019-11-23 20:39:05,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 20:39:05,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:05,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 20:39:05,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=853, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:39:05,016 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 34 states. [2019-11-23 20:39:05,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:05,295 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2019-11-23 20:39:05,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:39:05,296 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 44 [2019-11-23 20:39:05,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:05,297 INFO L225 Difference]: With dead ends: 86 [2019-11-23 20:39:05,297 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 20:39:05,299 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=454, Invalid=1438, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:39:05,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 20:39:05,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2019-11-23 20:39:05,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:39:05,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2019-11-23 20:39:05,308 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2019-11-23 20:39:05,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:05,308 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2019-11-23 20:39:05,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 20:39:05,308 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2019-11-23 20:39:05,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:39:05,309 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:05,309 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:05,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:05,513 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:05,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:05,513 INFO L82 PathProgramCache]: Analyzing trace with hash 814558120, now seen corresponding path program 17 times [2019-11-23 20:39:05,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:05,514 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722414253] [2019-11-23 20:39:05,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:05,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:06,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722414253] [2019-11-23 20:39:06,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493301246] [2019-11-23 20:39:06,051 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:06,162 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-23 20:39:06,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:06,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 71 conjunts are in the unsatisfiable core [2019-11-23 20:39:06,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:06,567 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 13 treesize of output 9 [2019-11-23 20:39:06,567 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:39:06,571 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:06,571 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:39:06,572 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-23 20:39:06,982 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:39:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:07,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:07,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2019-11-23 20:39:07,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845710648] [2019-11-23 20:39:07,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-23 20:39:07,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:07,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-23 20:39:07,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:39:07,062 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 46 states. [2019-11-23 20:39:08,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:08,248 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2019-11-23 20:39:08,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:39:08,248 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2019-11-23 20:39:08,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:08,249 INFO L225 Difference]: With dead ends: 53 [2019-11-23 20:39:08,249 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 20:39:08,251 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=235, Invalid=3187, Unknown=0, NotChecked=0, Total=3422 [2019-11-23 20:39:08,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 20:39:08,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-11-23 20:39:08,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 20:39:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2019-11-23 20:39:08,256 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2019-11-23 20:39:08,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:08,257 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2019-11-23 20:39:08,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-23 20:39:08,257 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2019-11-23 20:39:08,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 20:39:08,257 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:08,257 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:08,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:08,461 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:08,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:08,461 INFO L82 PathProgramCache]: Analyzing trace with hash -59476011, now seen corresponding path program 18 times [2019-11-23 20:39:08,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:08,462 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82785648] [2019-11-23 20:39:08,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:08,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82785648] [2019-11-23 20:39:08,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845326611] [2019-11-23 20:39:08,713 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:08,841 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-23 20:39:08,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:08,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:39:08,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:09,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:09,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2019-11-23 20:39:09,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591695950] [2019-11-23 20:39:09,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 20:39:09,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:09,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 20:39:09,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1015, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:39:09,092 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 37 states. [2019-11-23 20:39:09,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:09,401 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2019-11-23 20:39:09,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:39:09,401 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 48 [2019-11-23 20:39:09,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:09,402 INFO L225 Difference]: With dead ends: 93 [2019-11-23 20:39:09,402 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:39:09,404 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=537, Invalid=1719, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:39:09,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:39:09,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2019-11-23 20:39:09,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:39:09,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-23 20:39:09,411 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 48 [2019-11-23 20:39:09,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:09,411 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-23 20:39:09,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 20:39:09,411 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-23 20:39:09,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:39:09,411 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:09,412 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:09,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:09,612 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:09,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:09,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1204565259, now seen corresponding path program 19 times [2019-11-23 20:39:09,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:09,613 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830293237] [2019-11-23 20:39:09,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:10,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830293237] [2019-11-23 20:39:10,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77163270] [2019-11-23 20:39:10,114 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:10,164 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 77 conjunts are in the unsatisfiable core [2019-11-23 20:39:10,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:10,546 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 13 treesize of output 9 [2019-11-23 20:39:10,546 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:39:10,551 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:10,551 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:39:10,552 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-23 20:39:11,042 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:39:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:11,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:11,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2019-11-23 20:39:11,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010325123] [2019-11-23 20:39:11,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-23 20:39:11,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:11,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-23 20:39:11,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 20:39:11,099 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 50 states. [2019-11-23 20:39:12,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:12,725 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-11-23 20:39:12,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:39:12,727 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2019-11-23 20:39:12,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:12,727 INFO L225 Difference]: With dead ends: 57 [2019-11-23 20:39:12,727 INFO L226 Difference]: Without dead ends: 55 [2019-11-23 20:39:12,729 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=255, Invalid=3777, Unknown=0, NotChecked=0, Total=4032 [2019-11-23 20:39:12,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-23 20:39:12,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2019-11-23 20:39:12,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:39:12,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-11-23 20:39:12,736 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 49 [2019-11-23 20:39:12,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:12,736 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-11-23 20:39:12,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-23 20:39:12,736 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-11-23 20:39:12,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 20:39:12,737 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:12,737 INFO L410 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:12,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:12,939 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:12,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:12,940 INFO L82 PathProgramCache]: Analyzing trace with hash 756666258, now seen corresponding path program 20 times [2019-11-23 20:39:12,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:12,941 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38560323] [2019-11-23 20:39:12,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:13,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38560323] [2019-11-23 20:39:13,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965337567] [2019-11-23 20:39:13,248 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:13,297 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:39:13,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:13,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:39:13,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:13,584 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:13,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:13,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2019-11-23 20:39:13,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506531781] [2019-11-23 20:39:13,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:39:13,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:13,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:39:13,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:39:13,587 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 40 states. [2019-11-23 20:39:13,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:13,956 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2019-11-23 20:39:13,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:39:13,957 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 52 [2019-11-23 20:39:13,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:13,958 INFO L225 Difference]: With dead ends: 100 [2019-11-23 20:39:13,958 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:39:13,960 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=2025, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:39:13,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:39:13,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2019-11-23 20:39:13,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:39:13,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2019-11-23 20:39:13,966 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2019-11-23 20:39:13,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:13,966 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2019-11-23 20:39:13,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:39:13,966 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2019-11-23 20:39:13,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:39:13,967 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:13,967 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:14,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:14,168 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:14,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:14,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1598292424, now seen corresponding path program 21 times [2019-11-23 20:39:14,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:14,169 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598030878] [2019-11-23 20:39:14,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:14,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598030878] [2019-11-23 20:39:14,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547640542] [2019-11-23 20:39:14,998 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:15,333 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:39:15,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:15,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 63 conjunts are in the unsatisfiable core [2019-11-23 20:39:15,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:15,759 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 13 treesize of output 9 [2019-11-23 20:39:15,759 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:39:15,765 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:15,765 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:39:15,765 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2019-11-23 20:39:16,495 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:39:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 145 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:16,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:16,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 55 [2019-11-23 20:39:16,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189061297] [2019-11-23 20:39:16,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-11-23 20:39:16,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:16,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-11-23 20:39:16,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2766, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 20:39:16,552 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 55 states. [2019-11-23 20:39:19,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:19,700 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2019-11-23 20:39:19,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-11-23 20:39:19,701 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 53 [2019-11-23 20:39:19,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:19,702 INFO L225 Difference]: With dead ends: 100 [2019-11-23 20:39:19,702 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:39:19,706 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3194 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=880, Invalid=12002, Unknown=0, NotChecked=0, Total=12882 [2019-11-23 20:39:19,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:39:19,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-11-23 20:39:19,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:39:19,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2019-11-23 20:39:19,713 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2019-11-23 20:39:19,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:19,714 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2019-11-23 20:39:19,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-11-23 20:39:19,714 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2019-11-23 20:39:19,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:39:19,714 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:19,715 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:19,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:19,917 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:19,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:19,918 INFO L82 PathProgramCache]: Analyzing trace with hash -66153237, now seen corresponding path program 22 times [2019-11-23 20:39:19,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:19,919 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539334554] [2019-11-23 20:39:19,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:20,559 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:20,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539334554] [2019-11-23 20:39:20,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413066186] [2019-11-23 20:39:20,560 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:20,620 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:39:20,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:20,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 63 conjunts are in the unsatisfiable core [2019-11-23 20:39:20,623 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:21,064 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 13 treesize of output 9 [2019-11-23 20:39:21,064 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:39:21,069 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:21,069 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:39:21,070 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-23 20:39:21,748 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:39:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:21,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:21,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2019-11-23 20:39:21,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764391529] [2019-11-23 20:39:21,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-11-23 20:39:21,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:21,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-11-23 20:39:21,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2019-11-23 20:39:21,800 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 58 states. [2019-11-23 20:39:23,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:23,597 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2019-11-23 20:39:23,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 20:39:23,598 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2019-11-23 20:39:23,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:23,599 INFO L225 Difference]: With dead ends: 65 [2019-11-23 20:39:23,599 INFO L226 Difference]: Without dead ends: 63 [2019-11-23 20:39:23,599 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=295, Invalid=5107, Unknown=0, NotChecked=0, Total=5402 [2019-11-23 20:39:23,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-23 20:39:23,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-11-23 20:39:23,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-23 20:39:23,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2019-11-23 20:39:23,605 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 57 [2019-11-23 20:39:23,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:23,606 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2019-11-23 20:39:23,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-11-23 20:39:23,606 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2019-11-23 20:39:23,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 20:39:23,606 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:23,606 INFO L410 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:23,807 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:23,807 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:23,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:23,808 INFO L82 PathProgramCache]: Analyzing trace with hash 623698866, now seen corresponding path program 23 times [2019-11-23 20:39:23,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:23,808 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517425092] [2019-11-23 20:39:23,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:24,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517425092] [2019-11-23 20:39:24,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185529266] [2019-11-23 20:39:24,130 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:24,268 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-11-23 20:39:24,269 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:24,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:39:24,272 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:24,647 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:24,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:24,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2019-11-23 20:39:24,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864807324] [2019-11-23 20:39:24,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-23 20:39:24,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:24,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-23 20:39:24,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1585, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:39:24,649 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 46 states. [2019-11-23 20:39:25,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:25,049 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2019-11-23 20:39:25,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 20:39:25,050 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 60 [2019-11-23 20:39:25,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:25,051 INFO L225 Difference]: With dead ends: 114 [2019-11-23 20:39:25,051 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 20:39:25,052 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=828, Invalid=2712, Unknown=0, NotChecked=0, Total=3540 [2019-11-23 20:39:25,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 20:39:25,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2019-11-23 20:39:25,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:39:25,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2019-11-23 20:39:25,059 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2019-11-23 20:39:25,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:25,059 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2019-11-23 20:39:25,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-23 20:39:25,059 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2019-11-23 20:39:25,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:39:25,060 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:25,060 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:25,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:25,264 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:25,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:25,264 INFO L82 PathProgramCache]: Analyzing trace with hash 829718504, now seen corresponding path program 24 times [2019-11-23 20:39:25,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:25,265 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584759515] [2019-11-23 20:39:25,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:26,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584759515] [2019-11-23 20:39:26,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97083671] [2019-11-23 20:39:26,162 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:26,681 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-11-23 20:39:26,681 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:26,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 99 conjunts are in the unsatisfiable core [2019-11-23 20:39:26,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:27,224 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 13 treesize of output 9 [2019-11-23 20:39:27,224 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:39:27,230 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:27,230 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:39:27,230 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2019-11-23 20:39:27,297 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:27,298 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-23 20:39:27,299 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:39:27,309 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:27,310 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:39:27,310 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2019-11-23 20:39:27,398 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:27,400 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:27,402 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:27,403 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:27,404 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2019-11-23 20:39:27,404 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:39:27,417 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:27,418 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:39:27,418 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2019-11-23 20:39:27,524 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:27,526 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:27,527 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:27,529 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:27,530 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:27,531 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:39:27,532 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:27,533 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 46 [2019-11-23 20:39:27,533 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:39:27,547 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:27,548 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:39:27,548 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:40 [2019-11-23 20:39:28,996 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:39:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:29,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:29,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 63 [2019-11-23 20:39:29,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314448665] [2019-11-23 20:39:29,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-11-23 20:39:29,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:29,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-11-23 20:39:29,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=3679, Unknown=0, NotChecked=0, Total=3906 [2019-11-23 20:39:29,061 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 63 states. [2019-11-23 20:39:31,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:31,288 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2019-11-23 20:39:31,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 20:39:31,288 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 61 [2019-11-23 20:39:31,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:31,289 INFO L225 Difference]: With dead ends: 69 [2019-11-23 20:39:31,289 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:39:31,290 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=396, Invalid=5766, Unknown=0, NotChecked=0, Total=6162 [2019-11-23 20:39:31,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:39:31,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-11-23 20:39:31,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 20:39:31,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-11-23 20:39:31,298 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 61 [2019-11-23 20:39:31,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:31,298 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-11-23 20:39:31,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-11-23 20:39:31,298 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-11-23 20:39:31,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 20:39:31,299 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:31,299 INFO L410 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:31,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:31,503 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:31,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:31,503 INFO L82 PathProgramCache]: Analyzing trace with hash 611957653, now seen corresponding path program 25 times [2019-11-23 20:39:31,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:31,503 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043263556] [2019-11-23 20:39:31,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:31,909 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043263556] [2019-11-23 20:39:31,909 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853368587] [2019-11-23 20:39:31,909 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:31,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:31,978 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 20:39:31,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:32,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:32,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2019-11-23 20:39:32,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661893719] [2019-11-23 20:39:32,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 20:39:32,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:32,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 20:39:32,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1803, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:39:32,381 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 49 states. [2019-11-23 20:39:32,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:32,850 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2019-11-23 20:39:32,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:39:32,851 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 64 [2019-11-23 20:39:32,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:32,852 INFO L225 Difference]: With dead ends: 121 [2019-11-23 20:39:32,852 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:39:32,853 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=939, Invalid=3093, Unknown=0, NotChecked=0, Total=4032 [2019-11-23 20:39:32,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:39:32,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2019-11-23 20:39:32,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:39:32,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2019-11-23 20:39:32,861 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2019-11-23 20:39:32,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:32,862 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2019-11-23 20:39:32,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 20:39:32,862 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2019-11-23 20:39:32,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:39:32,862 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:32,862 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:33,062 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:33,063 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:33,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:33,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1317817547, now seen corresponding path program 26 times [2019-11-23 20:39:33,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:33,064 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165837947] [2019-11-23 20:39:33,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:34,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165837947] [2019-11-23 20:39:34,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87309895] [2019-11-23 20:39:34,216 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:34,276 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:39:34,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:34,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 76 conjunts are in the unsatisfiable core [2019-11-23 20:39:34,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:34,850 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 13 treesize of output 9 [2019-11-23 20:39:34,850 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:39:34,855 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:34,855 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:39:34,855 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-23 20:39:35,765 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:39:35,822 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:35,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:35,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35] total 67 [2019-11-23 20:39:35,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440473767] [2019-11-23 20:39:35,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-11-23 20:39:35,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:35,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-11-23 20:39:35,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=4224, Unknown=0, NotChecked=0, Total=4422 [2019-11-23 20:39:35,824 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 67 states. [2019-11-23 20:39:38,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:38,504 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2019-11-23 20:39:38,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-11-23 20:39:38,505 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 65 [2019-11-23 20:39:38,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:38,506 INFO L225 Difference]: With dead ends: 73 [2019-11-23 20:39:38,506 INFO L226 Difference]: Without dead ends: 71 [2019-11-23 20:39:38,507 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=355, Invalid=6955, Unknown=0, NotChecked=0, Total=7310 [2019-11-23 20:39:38,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-23 20:39:38,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-11-23 20:39:38,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-23 20:39:38,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2019-11-23 20:39:38,517 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 65 [2019-11-23 20:39:38,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:38,517 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2019-11-23 20:39:38,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-11-23 20:39:38,517 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2019-11-23 20:39:38,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-23 20:39:38,518 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:38,518 INFO L410 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:38,721 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:38,721 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:38,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:38,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1188716590, now seen corresponding path program 27 times [2019-11-23 20:39:38,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:38,722 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274994691] [2019-11-23 20:39:38,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:39,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274994691] [2019-11-23 20:39:39,236 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759564132] [2019-11-23 20:39:39,236 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:39,765 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-23 20:39:39,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:39,768 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:39:39,770 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:40,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:40,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2019-11-23 20:39:40,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702445799] [2019-11-23 20:39:40,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-23 20:39:40,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:40,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-23 20:39:40,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=2035, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:39:40,198 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 52 states. [2019-11-23 20:39:40,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:40,699 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2019-11-23 20:39:40,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 20:39:40,700 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 68 [2019-11-23 20:39:40,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:40,701 INFO L225 Difference]: With dead ends: 128 [2019-11-23 20:39:40,701 INFO L226 Difference]: Without dead ends: 76 [2019-11-23 20:39:40,702 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1057, Invalid=3499, Unknown=0, NotChecked=0, Total=4556 [2019-11-23 20:39:40,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-23 20:39:40,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2019-11-23 20:39:40,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:39:40,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2019-11-23 20:39:40,711 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2019-11-23 20:39:40,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:40,711 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2019-11-23 20:39:40,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-11-23 20:39:40,711 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2019-11-23 20:39:40,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:39:40,712 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:40,712 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:40,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:40,915 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:40,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:40,915 INFO L82 PathProgramCache]: Analyzing trace with hash -2004834808, now seen corresponding path program 28 times [2019-11-23 20:39:40,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:40,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782442755] [2019-11-23 20:39:40,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:41,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782442755] [2019-11-23 20:39:41,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662773391] [2019-11-23 20:39:41,750 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:41,811 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:39:41,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:41,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 107 conjunts are in the unsatisfiable core [2019-11-23 20:39:41,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:42,492 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 13 treesize of output 9 [2019-11-23 20:39:42,492 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:39:42,497 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:42,497 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:39:42,498 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-23 20:39:43,444 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:39:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:43,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:43,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2019-11-23 20:39:43,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435040279] [2019-11-23 20:39:43,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-11-23 20:39:43,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:43,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-11-23 20:39:43,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=4626, Unknown=0, NotChecked=0, Total=4830 [2019-11-23 20:39:43,504 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 70 states. [2019-11-23 20:39:45,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:45,664 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2019-11-23 20:39:45,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-11-23 20:39:45,664 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2019-11-23 20:39:45,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:45,665 INFO L225 Difference]: With dead ends: 77 [2019-11-23 20:39:45,665 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 20:39:45,666 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=355, Invalid=7477, Unknown=0, NotChecked=0, Total=7832 [2019-11-23 20:39:45,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 20:39:45,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2019-11-23 20:39:45,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-23 20:39:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2019-11-23 20:39:45,675 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 69 [2019-11-23 20:39:45,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:45,675 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2019-11-23 20:39:45,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-11-23 20:39:45,675 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2019-11-23 20:39:45,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-23 20:39:45,675 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:45,675 INFO L410 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:45,877 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:45,877 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:45,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:45,878 INFO L82 PathProgramCache]: Analyzing trace with hash -213753483, now seen corresponding path program 29 times [2019-11-23 20:39:45,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:45,878 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826011402] [2019-11-23 20:39:45,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:46,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826011402] [2019-11-23 20:39:46,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843429506] [2019-11-23 20:39:46,316 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:46,497 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-11-23 20:39:46,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:46,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 20:39:46,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:46,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:46,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 55 [2019-11-23 20:39:46,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315534536] [2019-11-23 20:39:46,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-11-23 20:39:46,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:46,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-11-23 20:39:46,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=689, Invalid=2281, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 20:39:46,979 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 55 states. [2019-11-23 20:39:47,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:47,574 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2019-11-23 20:39:47,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:39:47,574 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 72 [2019-11-23 20:39:47,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:47,575 INFO L225 Difference]: With dead ends: 135 [2019-11-23 20:39:47,575 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:39:47,576 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1182, Invalid=3930, Unknown=0, NotChecked=0, Total=5112 [2019-11-23 20:39:47,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:39:47,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2019-11-23 20:39:47,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 20:39:47,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2019-11-23 20:39:47,586 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2019-11-23 20:39:47,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:47,586 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2019-11-23 20:39:47,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-11-23 20:39:47,586 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2019-11-23 20:39:47,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-23 20:39:47,587 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:47,587 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:47,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:47,789 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:47,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:47,790 INFO L82 PathProgramCache]: Analyzing trace with hash -190620501, now seen corresponding path program 30 times [2019-11-23 20:39:47,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:47,791 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798076358] [2019-11-23 20:39:47,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:48,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798076358] [2019-11-23 20:39:48,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575232815] [2019-11-23 20:39:48,732 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:49,016 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-23 20:39:49,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:49,019 INFO L255 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 84 conjunts are in the unsatisfiable core [2019-11-23 20:39:49,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:49,714 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 13 treesize of output 9 [2019-11-23 20:39:49,715 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:39:49,718 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:49,718 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:39:49,718 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-23 20:39:50,832 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:39:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:50,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:50,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39] total 75 [2019-11-23 20:39:50,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509443495] [2019-11-23 20:39:50,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 75 states [2019-11-23 20:39:50,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:50,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2019-11-23 20:39:50,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=5328, Unknown=0, NotChecked=0, Total=5550 [2019-11-23 20:39:50,901 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 75 states. [2019-11-23 20:39:53,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:53,682 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2019-11-23 20:39:53,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-23 20:39:53,683 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 73 [2019-11-23 20:39:53,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:53,683 INFO L225 Difference]: With dead ends: 81 [2019-11-23 20:39:53,683 INFO L226 Difference]: Without dead ends: 79 [2019-11-23 20:39:53,684 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1661 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=404, Invalid=8908, Unknown=0, NotChecked=0, Total=9312 [2019-11-23 20:39:53,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-23 20:39:53,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-11-23 20:39:53,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 20:39:53,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2019-11-23 20:39:53,692 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 73 [2019-11-23 20:39:53,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:53,692 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2019-11-23 20:39:53,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 75 states. [2019-11-23 20:39:53,693 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2019-11-23 20:39:53,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 20:39:53,693 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:53,693 INFO L410 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:53,893 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:53,894 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:53,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:53,894 INFO L82 PathProgramCache]: Analyzing trace with hash -823786510, now seen corresponding path program 31 times [2019-11-23 20:39:53,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:53,895 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232988457] [2019-11-23 20:39:53,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 393 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:54,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232988457] [2019-11-23 20:39:54,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644792427] [2019-11-23 20:39:54,473 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:54,537 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 20:39:54,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:55,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:55,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2019-11-23 20:39:55,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75427091] [2019-11-23 20:39:55,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-11-23 20:39:55,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:55,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-11-23 20:39:55,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=2541, Unknown=0, NotChecked=0, Total=3306 [2019-11-23 20:39:55,103 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 58 states. [2019-11-23 20:39:55,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:55,685 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2019-11-23 20:39:55,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:39:55,686 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 76 [2019-11-23 20:39:55,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:55,687 INFO L225 Difference]: With dead ends: 142 [2019-11-23 20:39:55,687 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 20:39:55,688 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1314, Invalid=4386, Unknown=0, NotChecked=0, Total=5700 [2019-11-23 20:39:55,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 20:39:55,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2019-11-23 20:39:55,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 20:39:55,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2019-11-23 20:39:55,697 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 76 [2019-11-23 20:39:55,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:55,697 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2019-11-23 20:39:55,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-11-23 20:39:55,697 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2019-11-23 20:39:55,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 20:39:55,697 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:55,697 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:55,898 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:55,898 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:55,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:55,899 INFO L82 PathProgramCache]: Analyzing trace with hash -196447192, now seen corresponding path program 32 times [2019-11-23 20:39:55,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:55,899 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558647871] [2019-11-23 20:39:55,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:56,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558647871] [2019-11-23 20:39:56,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347270383] [2019-11-23 20:39:56,935 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:57,001 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:39:57,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:57,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 88 conjunts are in the unsatisfiable core [2019-11-23 20:39:57,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:57,797 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 13 treesize of output 9 [2019-11-23 20:39:57,797 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:39:57,802 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:39:57,802 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:39:57,802 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-23 20:39:59,021 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:39:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:59,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:59,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41] total 79 [2019-11-23 20:39:59,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451498843] [2019-11-23 20:39:59,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 79 states [2019-11-23 20:39:59,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:59,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2019-11-23 20:39:59,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=5928, Unknown=0, NotChecked=0, Total=6162 [2019-11-23 20:39:59,090 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 79 states. [2019-11-23 20:40:02,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:02,110 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2019-11-23 20:40:02,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-11-23 20:40:02,110 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 77 [2019-11-23 20:40:02,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:02,111 INFO L225 Difference]: With dead ends: 85 [2019-11-23 20:40:02,111 INFO L226 Difference]: Without dead ends: 83 [2019-11-23 20:40:02,111 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1782 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=415, Invalid=9685, Unknown=0, NotChecked=0, Total=10100 [2019-11-23 20:40:02,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-23 20:40:02,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2019-11-23 20:40:02,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-23 20:40:02,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2019-11-23 20:40:02,120 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 77 [2019-11-23 20:40:02,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:02,120 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2019-11-23 20:40:02,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 79 states. [2019-11-23 20:40:02,121 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2019-11-23 20:40:02,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-23 20:40:02,121 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:02,121 INFO L410 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:02,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:02,322 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:02,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:02,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1686921045, now seen corresponding path program 33 times [2019-11-23 20:40:02,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:02,323 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450782305] [2019-11-23 20:40:02,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 443 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:40:02,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450782305] [2019-11-23 20:40:02,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563596088] [2019-11-23 20:40:02,861 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:03,790 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2019-11-23 20:40:03,791 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:03,794 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:40:03,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:40:04,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:40:04,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 61 [2019-11-23 20:40:04,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921060821] [2019-11-23 20:40:04,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-11-23 20:40:04,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:04,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-11-23 20:40:04,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=845, Invalid=2815, Unknown=0, NotChecked=0, Total=3660 [2019-11-23 20:40:04,390 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 61 states. [2019-11-23 20:40:04,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:04,953 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2019-11-23 20:40:04,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:40:04,954 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 80 [2019-11-23 20:40:04,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:04,954 INFO L225 Difference]: With dead ends: 149 [2019-11-23 20:40:04,954 INFO L226 Difference]: Without dead ends: 88 [2019-11-23 20:40:04,955 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1453, Invalid=4867, Unknown=0, NotChecked=0, Total=6320 [2019-11-23 20:40:04,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-23 20:40:04,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2019-11-23 20:40:04,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-23 20:40:04,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2019-11-23 20:40:04,964 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2019-11-23 20:40:04,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:04,964 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2019-11-23 20:40:04,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-11-23 20:40:04,964 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2019-11-23 20:40:04,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-23 20:40:04,964 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:04,964 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:05,165 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:05,165 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:05,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:05,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1697760395, now seen corresponding path program 34 times [2019-11-23 20:40:05,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:05,166 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938895430] [2019-11-23 20:40:05,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:05,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:40:06,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938895430] [2019-11-23 20:40:06,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924250642] [2019-11-23 20:40:06,302 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:06,371 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:40:06,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:06,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 125 conjunts are in the unsatisfiable core [2019-11-23 20:40:06,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:07,480 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 13 treesize of output 9 [2019-11-23 20:40:07,480 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:40:07,483 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:40:07,483 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:40:07,484 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-23 20:40:08,754 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:40:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:40:08,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:40:08,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2019-11-23 20:40:08,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421963591] [2019-11-23 20:40:08,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-11-23 20:40:08,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:08,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-11-23 20:40:08,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=6402, Unknown=0, NotChecked=0, Total=6642 [2019-11-23 20:40:08,834 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 82 states. [2019-11-23 20:40:11,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:11,869 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2019-11-23 20:40:11,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-11-23 20:40:11,870 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2019-11-23 20:40:11,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:11,870 INFO L225 Difference]: With dead ends: 89 [2019-11-23 20:40:11,870 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:40:11,871 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=415, Invalid=10297, Unknown=0, NotChecked=0, Total=10712 [2019-11-23 20:40:11,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:40:11,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2019-11-23 20:40:11,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-23 20:40:11,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2019-11-23 20:40:11,882 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 81 [2019-11-23 20:40:11,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:11,883 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2019-11-23 20:40:11,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-11-23 20:40:11,883 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2019-11-23 20:40:11,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-11-23 20:40:11,883 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:11,883 INFO L410 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:12,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:12,084 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:12,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:12,084 INFO L82 PathProgramCache]: Analyzing trace with hash 449843218, now seen corresponding path program 35 times [2019-11-23 20:40:12,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:12,085 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356808076] [2019-11-23 20:40:12,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:12,659 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 496 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:40:12,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356808076] [2019-11-23 20:40:12,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371179534] [2019-11-23 20:40:12,659 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:12,946 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-11-23 20:40:12,946 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:12,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-23 20:40:12,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:40:13,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:40:13,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2019-11-23 20:40:13,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368188816] [2019-11-23 20:40:13,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-11-23 20:40:13,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:13,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-11-23 20:40:13,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=3103, Unknown=0, NotChecked=0, Total=4032 [2019-11-23 20:40:13,629 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 64 states. [2019-11-23 20:40:14,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:14,244 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2019-11-23 20:40:14,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-23 20:40:14,244 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 84 [2019-11-23 20:40:14,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:14,245 INFO L225 Difference]: With dead ends: 156 [2019-11-23 20:40:14,245 INFO L226 Difference]: Without dead ends: 92 [2019-11-23 20:40:14,246 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1599, Invalid=5373, Unknown=0, NotChecked=0, Total=6972 [2019-11-23 20:40:14,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-23 20:40:14,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2019-11-23 20:40:14,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:40:14,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2019-11-23 20:40:14,255 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 84 [2019-11-23 20:40:14,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:14,256 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2019-11-23 20:40:14,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-11-23 20:40:14,256 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2019-11-23 20:40:14,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:40:14,256 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:14,256 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:14,456 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:14,457 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:14,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:14,457 INFO L82 PathProgramCache]: Analyzing trace with hash -751572408, now seen corresponding path program 36 times [2019-11-23 20:40:14,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:14,458 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865359001] [2019-11-23 20:40:14,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:40:15,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865359001] [2019-11-23 20:40:15,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513359692] [2019-11-23 20:40:15,675 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:16,181 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2019-11-23 20:40:16,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:16,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 133 conjunts are in the unsatisfiable core [2019-11-23 20:40:16,188 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:16,903 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 13 treesize of output 9 [2019-11-23 20:40:16,903 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:40:16,910 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:40:16,910 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:40:16,910 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2019-11-23 20:40:16,969 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:16,970 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2019-11-23 20:40:16,970 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:40:16,979 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:40:16,980 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:40:16,980 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2019-11-23 20:40:17,056 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,058 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,059 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,060 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:40:17,060 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2019-11-23 20:40:17,061 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:40:17,072 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:40:17,072 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:40:17,072 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2019-11-23 20:40:17,147 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,148 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,149 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,151 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,152 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,153 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,154 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:40:17,154 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 46 [2019-11-23 20:40:17,155 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:40:17,166 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:40:17,166 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:40:17,166 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:43 [2019-11-23 20:40:17,251 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,252 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,255 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,256 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,257 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,257 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,258 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,259 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,260 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,262 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,263 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:40:17,263 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 63 [2019-11-23 20:40:17,264 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:40:17,277 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:40:17,277 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:40:17,278 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:57 [2019-11-23 20:40:17,374 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,375 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,377 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,377 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,378 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,379 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,379 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,380 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,381 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,382 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,383 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,384 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,385 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,386 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,387 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:40:17,388 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:40:17,389 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 70 [2019-11-23 20:40:17,389 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:40:17,403 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:40:17,403 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:40:17,404 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:58