/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-tiling/pnr5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:53:19,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:53:19,900 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:53:19,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:53:19,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:53:19,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:53:19,923 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:53:19,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:53:19,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:53:19,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:53:19,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:53:19,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:53:19,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:53:19,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:53:19,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:53:19,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:53:19,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:53:19,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:53:19,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:53:19,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:53:19,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:53:19,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:53:19,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:53:19,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:53:19,970 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:53:19,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:53:19,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:53:19,976 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:53:19,977 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:53:19,978 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:53:19,979 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:53:19,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:53:19,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:53:19,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:53:19,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:53:19,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:53:19,982 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:53:20,014 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:53:20,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:53:20,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:53:20,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:53:20,016 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:53:20,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:53:20,017 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:53:20,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:53:20,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:53:20,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:53:20,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:53:20,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:53:20,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:53:20,018 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:53:20,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:53:20,018 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:53:20,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:53:20,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:53:20,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:53:20,019 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:53:20,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:53:20,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:53:20,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:53:20,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:53:20,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:53:20,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:53:20,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:53:20,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:53:20,021 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:53:20,297 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:53:20,310 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:53:20,313 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:53:20,315 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:53:20,315 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:53:20,316 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/pnr5.c [2019-11-06 18:53:20,392 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41b1c4113/201a70b838984252b3d4bfba93efa61d/FLAG4be41f106 [2019-11-06 18:53:20,782 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:53:20,786 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pnr5.c [2019-11-06 18:53:20,792 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41b1c4113/201a70b838984252b3d4bfba93efa61d/FLAG4be41f106 [2019-11-06 18:53:21,233 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41b1c4113/201a70b838984252b3d4bfba93efa61d [2019-11-06 18:53:21,262 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:53:21,267 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:53:21,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:53:21,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:53:21,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:53:21,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:53:21" (1/1) ... [2019-11-06 18:53:21,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@245ee514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:21, skipping insertion in model container [2019-11-06 18:53:21,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:53:21" (1/1) ... [2019-11-06 18:53:21,311 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:53:21,363 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:53:21,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:53:21,761 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:53:21,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:53:21,900 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:53:21,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:21 WrapperNode [2019-11-06 18:53:21,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:53:21,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:53:21,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:53:21,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:53:21,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:21" (1/1) ... [2019-11-06 18:53:21,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:21" (1/1) ... [2019-11-06 18:53:21,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:21" (1/1) ... [2019-11-06 18:53:21,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:21" (1/1) ... [2019-11-06 18:53:21,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:21" (1/1) ... [2019-11-06 18:53:21,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:21" (1/1) ... [2019-11-06 18:53:21,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:21" (1/1) ... [2019-11-06 18:53:21,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:53:21,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:53:21,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:53:21,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:53:21,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:53:22,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:53:22,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:53:22,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:53:22,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2019-11-06 18:53:22,005 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:53:22,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:53:22,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 18:53:22,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:53:22,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:53:22,006 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 18:53:22,006 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2019-11-06 18:53:22,006 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:53:22,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 18:53:22,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:53:22,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:53:22,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:53:22,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:53:22,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:53:22,428 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:53:22,428 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-06 18:53:22,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:53:22 BoogieIcfgContainer [2019-11-06 18:53:22,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:53:22,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:53:22,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:53:22,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:53:22,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:53:21" (1/3) ... [2019-11-06 18:53:22,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382f9136 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:53:22, skipping insertion in model container [2019-11-06 18:53:22,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:21" (2/3) ... [2019-11-06 18:53:22,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382f9136 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:53:22, skipping insertion in model container [2019-11-06 18:53:22,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:53:22" (3/3) ... [2019-11-06 18:53:22,437 INFO L109 eAbstractionObserver]: Analyzing ICFG pnr5.c [2019-11-06 18:53:22,447 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:53:22,455 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:53:22,467 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:53:22,492 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:53:22,493 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:53:22,493 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:53:22,493 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:53:22,493 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:53:22,493 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:53:22,494 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:53:22,494 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:53:22,510 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2019-11-06 18:53:22,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:53:22,515 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:22,516 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:22,518 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:22,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:22,523 INFO L82 PathProgramCache]: Analyzing trace with hash -973608197, now seen corresponding path program 1 times [2019-11-06 18:53:22,530 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:22,530 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187670551] [2019-11-06 18:53:22,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:22,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:22,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:53:22,724 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187670551] [2019-11-06 18:53:22,725 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:53:22,726 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:53:22,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938108592] [2019-11-06 18:53:22,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:53:22,733 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:22,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:53:22,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:53:22,750 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2019-11-06 18:53:22,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:22,916 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2019-11-06 18:53:22,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:53:22,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-06 18:53:22,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:22,928 INFO L225 Difference]: With dead ends: 60 [2019-11-06 18:53:22,928 INFO L226 Difference]: Without dead ends: 39 [2019-11-06 18:53:22,932 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:53:22,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-06 18:53:22,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-06 18:53:22,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 18:53:22,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2019-11-06 18:53:22,992 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 15 [2019-11-06 18:53:22,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:22,993 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2019-11-06 18:53:22,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:53:22,994 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2019-11-06 18:53:22,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:53:22,996 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:22,996 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:22,997 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:22,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:22,998 INFO L82 PathProgramCache]: Analyzing trace with hash 2038399118, now seen corresponding path program 1 times [2019-11-06 18:53:22,998 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:22,999 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97257175] [2019-11-06 18:53:22,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:23,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:23,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:53:23,256 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97257175] [2019-11-06 18:53:23,256 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:53:23,256 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 18:53:23,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184726682] [2019-11-06 18:53:23,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:53:23,258 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:23,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:53:23,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:53:23,259 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 5 states. [2019-11-06 18:53:23,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:23,564 INFO L93 Difference]: Finished difference Result 67 states and 88 transitions. [2019-11-06 18:53:23,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:53:23,564 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-06 18:53:23,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:23,566 INFO L225 Difference]: With dead ends: 67 [2019-11-06 18:53:23,566 INFO L226 Difference]: Without dead ends: 56 [2019-11-06 18:53:23,567 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:53:23,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-06 18:53:23,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2019-11-06 18:53:23,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 18:53:23,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2019-11-06 18:53:23,586 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 15 [2019-11-06 18:53:23,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:23,587 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2019-11-06 18:53:23,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:53:23,587 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2019-11-06 18:53:23,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 18:53:23,590 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:23,591 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:23,591 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:23,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:23,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1405014836, now seen corresponding path program 1 times [2019-11-06 18:53:23,592 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:23,592 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020610855] [2019-11-06 18:53:23,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:24,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:24,149 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 18:53:24,149 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020610855] [2019-11-06 18:53:24,150 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107934244] [2019-11-06 18:53:24,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:24,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 18:53:24,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:24,344 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-11-06 18:53:24,344 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:24,358 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:24,359 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:24,360 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2019-11-06 18:53:24,403 INFO L341 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2019-11-06 18:53:24,404 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2019-11-06 18:53:24,405 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:24,413 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:24,414 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:24,414 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:17 [2019-11-06 18:53:24,433 INFO L341 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2019-11-06 18:53:24,434 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2019-11-06 18:53:24,435 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:24,444 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:24,445 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:24,445 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:17 [2019-11-06 18:53:24,464 INFO L341 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2019-11-06 18:53:24,465 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2019-11-06 18:53:24,465 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:24,473 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:24,474 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:24,474 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:17 [2019-11-06 18:53:24,491 INFO L341 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2019-11-06 18:53:24,492 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2019-11-06 18:53:24,493 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:24,498 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:24,499 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:24,499 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:8 [2019-11-06 18:53:24,542 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2019-11-06 18:53:24,543 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:24,545 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:24,545 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:24,546 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:4 [2019-11-06 18:53:24,547 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 18:53:24,585 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:53:24,585 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2019-11-06 18:53:24,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071581887] [2019-11-06 18:53:24,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 18:53:24,587 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:24,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 18:53:24,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:53:24,588 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 17 states. [2019-11-06 18:53:25,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:25,198 INFO L93 Difference]: Finished difference Result 105 states and 146 transitions. [2019-11-06 18:53:25,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:53:25,200 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2019-11-06 18:53:25,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:25,202 INFO L225 Difference]: With dead ends: 105 [2019-11-06 18:53:25,206 INFO L226 Difference]: Without dead ends: 103 [2019-11-06 18:53:25,207 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:53:25,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-06 18:53:25,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 64. [2019-11-06 18:53:25,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-06 18:53:25,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 85 transitions. [2019-11-06 18:53:25,226 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 85 transitions. Word has length 47 [2019-11-06 18:53:25,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:25,228 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 85 transitions. [2019-11-06 18:53:25,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 18:53:25,229 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 85 transitions. [2019-11-06 18:53:25,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 18:53:25,232 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:25,232 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:25,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:25,438 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:25,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:25,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1332628278, now seen corresponding path program 1 times [2019-11-06 18:53:25,439 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:25,439 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246844394] [2019-11-06 18:53:25,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:25,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:25,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 18:53:25,752 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246844394] [2019-11-06 18:53:25,752 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589428372] [2019-11-06 18:53:25,752 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 [2019-11-06 18:53:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:25,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 18:53:25,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:25,877 INFO L375 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 16 treesize of output 12 [2019-11-06 18:53:25,877 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:25,889 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:25,889 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:25,890 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2019-11-06 18:53:25,987 INFO L341 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2019-11-06 18:53:25,988 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2019-11-06 18:53:25,989 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:25,998 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:25,999 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:25,999 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2019-11-06 18:53:26,063 INFO L341 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2019-11-06 18:53:26,064 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2019-11-06 18:53:26,065 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:26,073 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:26,074 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:26,074 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2019-11-06 18:53:26,148 INFO L341 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2019-11-06 18:53:26,149 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2019-11-06 18:53:26,149 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:26,160 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:26,160 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:26,161 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2019-11-06 18:53:26,229 INFO L341 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2019-11-06 18:53:26,230 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2019-11-06 18:53:26,232 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:26,239 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:26,239 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:26,240 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:11 [2019-11-06 18:53:26,293 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-06 18:53:26,295 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:26,299 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:26,300 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:26,300 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2019-11-06 18:53:26,320 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-06 18:53:26,369 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:53:26,369 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2019-11-06 18:53:26,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996666872] [2019-11-06 18:53:26,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:53:26,370 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:26,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:53:26,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:53:26,371 INFO L87 Difference]: Start difference. First operand 64 states and 85 transitions. Second operand 20 states. [2019-11-06 18:53:28,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:28,099 INFO L93 Difference]: Finished difference Result 211 states and 292 transitions. [2019-11-06 18:53:28,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:53:28,103 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2019-11-06 18:53:28,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:28,108 INFO L225 Difference]: With dead ends: 211 [2019-11-06 18:53:28,108 INFO L226 Difference]: Without dead ends: 209 [2019-11-06 18:53:28,110 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=256, Invalid=1384, Unknown=0, NotChecked=0, Total=1640 [2019-11-06 18:53:28,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-11-06 18:53:28,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 46. [2019-11-06 18:53:28,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 18:53:28,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2019-11-06 18:53:28,128 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 47 [2019-11-06 18:53:28,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:28,128 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2019-11-06 18:53:28,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:53:28,129 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2019-11-06 18:53:28,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-06 18:53:28,130 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:28,131 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:28,334 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:28,335 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:28,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:28,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2120960149, now seen corresponding path program 1 times [2019-11-06 18:53:28,336 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:28,336 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113708418] [2019-11-06 18:53:28,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:28,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 18:53:28,552 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113708418] [2019-11-06 18:53:28,552 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907215388] [2019-11-06 18:53:28,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:28,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 18:53:28,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:28,615 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-11-06 18:53:28,615 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:28,620 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:28,621 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:28,621 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2019-11-06 18:53:28,635 INFO L341 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2019-11-06 18:53:28,636 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2019-11-06 18:53:28,638 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:28,645 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:28,645 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:28,646 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:17 [2019-11-06 18:53:28,685 INFO L341 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2019-11-06 18:53:28,686 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2019-11-06 18:53:28,687 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:28,693 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:28,693 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:28,694 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:17 [2019-11-06 18:53:28,709 INFO L341 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2019-11-06 18:53:28,709 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2019-11-06 18:53:28,711 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:28,715 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:28,716 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:28,716 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:10 [2019-11-06 18:53:28,726 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2019-11-06 18:53:28,727 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:28,729 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:28,729 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:28,729 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:4 [2019-11-06 18:53:28,730 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 18:53:28,758 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:53:28,758 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2019-11-06 18:53:28,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339550098] [2019-11-06 18:53:28,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:53:28,761 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:28,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:53:28,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:53:28,764 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 13 states. [2019-11-06 18:53:29,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:29,349 INFO L93 Difference]: Finished difference Result 108 states and 147 transitions. [2019-11-06 18:53:29,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:53:29,349 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2019-11-06 18:53:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:29,352 INFO L225 Difference]: With dead ends: 108 [2019-11-06 18:53:29,352 INFO L226 Difference]: Without dead ends: 106 [2019-11-06 18:53:29,353 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:53:29,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-06 18:53:29,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 74. [2019-11-06 18:53:29,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-06 18:53:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 96 transitions. [2019-11-06 18:53:29,370 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 96 transitions. Word has length 55 [2019-11-06 18:53:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:29,371 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 96 transitions. [2019-11-06 18:53:29,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:53:29,371 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 96 transitions. [2019-11-06 18:53:29,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-06 18:53:29,373 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:29,374 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:29,577 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:29,577 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:29,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:29,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1276954647, now seen corresponding path program 1 times [2019-11-06 18:53:29,578 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:29,578 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441721771] [2019-11-06 18:53:29,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:29,823 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 18:53:29,823 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441721771] [2019-11-06 18:53:29,823 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197564448] [2019-11-06 18:53:29,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:29,893 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 18:53:29,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:29,951 INFO L375 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 16 treesize of output 12 [2019-11-06 18:53:29,951 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:29,959 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:29,960 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:29,961 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2019-11-06 18:53:30,049 INFO L341 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2019-11-06 18:53:30,049 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2019-11-06 18:53:30,050 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:30,061 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:30,062 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:30,062 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2019-11-06 18:53:30,123 INFO L341 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2019-11-06 18:53:30,124 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2019-11-06 18:53:30,124 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:30,136 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:30,137 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:30,137 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2019-11-06 18:53:30,193 INFO L341 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2019-11-06 18:53:30,194 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2019-11-06 18:53:30,194 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:30,200 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:30,201 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:30,201 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2019-11-06 18:53:30,302 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2019-11-06 18:53:30,303 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:30,307 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:30,307 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:30,308 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2019-11-06 18:53:30,325 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:30,365 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:53:30,365 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:53:30,366 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2019-11-06 18:53:30,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426718667] [2019-11-06 18:53:30,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:53:30,369 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:30,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:53:30,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:53:30,370 INFO L87 Difference]: Start difference. First operand 74 states and 96 transitions. Second operand 21 states. [2019-11-06 18:53:47,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:47,808 INFO L93 Difference]: Finished difference Result 165 states and 218 transitions. [2019-11-06 18:53:47,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:53:47,809 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2019-11-06 18:53:47,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:47,811 INFO L225 Difference]: With dead ends: 165 [2019-11-06 18:53:47,811 INFO L226 Difference]: Without dead ends: 163 [2019-11-06 18:53:47,812 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 56 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2019-11-06 18:53:47,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-06 18:53:47,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 54. [2019-11-06 18:53:47,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-06 18:53:47,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2019-11-06 18:53:47,826 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 55 [2019-11-06 18:53:47,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:47,827 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2019-11-06 18:53:47,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:53:47,827 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2019-11-06 18:53:47,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-06 18:53:47,829 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:47,829 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:48,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:48,030 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:48,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:48,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1312764682, now seen corresponding path program 2 times [2019-11-06 18:53:48,032 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:48,032 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543711819] [2019-11-06 18:53:48,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:48,188 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 18:53:48,188 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543711819] [2019-11-06 18:53:48,188 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383032114] [2019-11-06 18:53:48,189 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:48,260 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:53:48,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:53:48,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-06 18:53:48,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:48,334 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-11-06 18:53:48,334 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:48,347 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:48,348 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:48,348 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2019-11-06 18:53:48,423 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:48,424 INFO L375 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 30 treesize of output 29 [2019-11-06 18:53:48,424 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:48,435 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:48,435 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:48,435 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:23 [2019-11-06 18:53:48,469 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:48,470 INFO L375 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 24 treesize of output 23 [2019-11-06 18:53:48,471 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:48,479 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:48,479 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:48,479 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:17 [2019-11-06 18:53:48,692 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2019-11-06 18:53:48,693 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:48,696 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:48,696 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:48,697 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:8 [2019-11-06 18:53:48,714 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 18:53:48,756 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:53:48,756 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2019-11-06 18:53:48,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717803865] [2019-11-06 18:53:48,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 18:53:48,757 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:48,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 18:53:48,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:53:48,758 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 22 states.