/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/mlceu.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:52:24,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:52:24,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:52:24,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:52:24,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:52:24,865 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:52:24,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:52:24,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:52:24,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:52:24,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:52:24,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:52:24,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:52:24,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:52:24,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:52:24,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:52:24,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:52:24,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:52:24,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:52:24,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:52:24,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:52:24,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:52:24,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:52:24,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:52:24,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:52:24,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:52:24,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:52:24,928 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:52:24,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:52:24,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:52:24,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:52:24,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:52:24,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:52:24,933 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:52:24,933 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:52:24,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:52:24,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:52:24,935 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 18:52:24,963 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:52:24,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:52:24,964 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:52:24,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:52:24,965 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:52:24,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:52:24,965 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:52:24,965 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:52:24,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:52:24,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:52:24,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:52:24,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:52:24,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:52:24,967 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:52:24,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:52:24,967 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:52:24,967 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:52:24,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:52:24,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:52:24,968 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:52:24,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:52:24,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:52:24,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:52:24,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:52:24,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:52:24,969 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:52:24,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:52:24,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:52:24,969 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:52:25,240 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:52:25,252 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:52:25,256 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:52:25,258 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:52:25,258 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:52:25,259 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mlceu.c [2019-11-06 18:52:25,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/220daac30/c1b5e729fd6b4456844fa8c0962b56c5/FLAG0acde8f96 [2019-11-06 18:52:25,799 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:52:25,800 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mlceu.c [2019-11-06 18:52:25,806 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/220daac30/c1b5e729fd6b4456844fa8c0962b56c5/FLAG0acde8f96 [2019-11-06 18:52:26,169 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/220daac30/c1b5e729fd6b4456844fa8c0962b56c5 [2019-11-06 18:52:26,177 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:52:26,179 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:52:26,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:52:26,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:52:26,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:52:26,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:52:26" (1/1) ... [2019-11-06 18:52:26,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b7c6973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:26, skipping insertion in model container [2019-11-06 18:52:26,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:52:26" (1/1) ... [2019-11-06 18:52:26,196 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:52:26,213 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:52:26,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:52:26,424 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:52:26,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:52:26,454 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:52:26,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:26 WrapperNode [2019-11-06 18:52:26,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:52:26,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:52:26,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:52:26,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:52:26,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:26" (1/1) ... [2019-11-06 18:52:26,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:26" (1/1) ... [2019-11-06 18:52:26,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:26" (1/1) ... [2019-11-06 18:52:26,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:26" (1/1) ... [2019-11-06 18:52:26,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:26" (1/1) ... [2019-11-06 18:52:26,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:26" (1/1) ... [2019-11-06 18:52:26,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:26" (1/1) ... [2019-11-06 18:52:26,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:52:26,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:52:26,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:52:26,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:52:26,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:26" (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 18:52:26,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:52:26,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:52:26,627 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:52:26,628 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:52:26,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:52:26,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 18:52:26,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:52:26,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:52:26,629 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 18:52:26,629 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:52:26,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 18:52:26,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:52:26,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:52:26,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:52:26,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:52:26,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:52:26,909 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:52:26,910 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-06 18:52:26,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:52:26 BoogieIcfgContainer [2019-11-06 18:52:26,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:52:26,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:52:26,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:52:26,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:52:26,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:52:26" (1/3) ... [2019-11-06 18:52:26,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7c8c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:52:26, skipping insertion in model container [2019-11-06 18:52:26,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:26" (2/3) ... [2019-11-06 18:52:26,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7c8c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:52:26, skipping insertion in model container [2019-11-06 18:52:26,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:52:26" (3/3) ... [2019-11-06 18:52:26,922 INFO L109 eAbstractionObserver]: Analyzing ICFG mlceu.c [2019-11-06 18:52:26,932 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:52:26,940 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:52:26,951 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:52:26,976 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:52:26,977 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:52:26,977 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:52:26,977 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:52:26,977 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:52:26,977 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:52:26,977 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:52:26,977 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:52:26,992 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-06 18:52:26,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-06 18:52:26,998 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:52:26,999 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:52:27,001 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:52:27,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:52:27,006 INFO L82 PathProgramCache]: Analyzing trace with hash 163391893, now seen corresponding path program 1 times [2019-11-06 18:52:27,013 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:52:27,013 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974322326] [2019-11-06 18:52:27,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:52:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:27,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:27,195 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 18:52:27,196 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974322326] [2019-11-06 18:52:27,196 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:52:27,197 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:52:27,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514462797] [2019-11-06 18:52:27,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:52:27,203 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:52:27,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:52:27,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:52:27,229 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2019-11-06 18:52:27,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:52:27,333 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2019-11-06 18:52:27,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:52:27,335 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-06 18:52:27,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:52:27,343 INFO L225 Difference]: With dead ends: 42 [2019-11-06 18:52:27,344 INFO L226 Difference]: Without dead ends: 21 [2019-11-06 18:52:27,347 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 18:52:27,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-06 18:52:27,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-06 18:52:27,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-06 18:52:27,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-06 18:52:27,390 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 14 [2019-11-06 18:52:27,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:52:27,391 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-06 18:52:27,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:52:27,391 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-06 18:52:27,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-06 18:52:27,392 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:52:27,392 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:52:27,393 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:52:27,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:52:27,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1009214006, now seen corresponding path program 1 times [2019-11-06 18:52:27,394 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:52:27,394 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120148520] [2019-11-06 18:52:27,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:52:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:27,523 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 18:52:27,527 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120148520] [2019-11-06 18:52:27,527 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:52:27,528 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:52:27,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221935572] [2019-11-06 18:52:27,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:52:27,531 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:52:27,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:52:27,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:52:27,533 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2019-11-06 18:52:27,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:52:27,611 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2019-11-06 18:52:27,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:52:27,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-06 18:52:27,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:52:27,613 INFO L225 Difference]: With dead ends: 38 [2019-11-06 18:52:27,613 INFO L226 Difference]: Without dead ends: 24 [2019-11-06 18:52:27,614 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:52:27,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-06 18:52:27,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-11-06 18:52:27,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-06 18:52:27,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-11-06 18:52:27,622 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2019-11-06 18:52:27,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:52:27,622 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-11-06 18:52:27,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:52:27,623 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-11-06 18:52:27,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:52:27,623 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:52:27,624 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:52:27,624 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:52:27,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:52:27,625 INFO L82 PathProgramCache]: Analyzing trace with hash 545846646, now seen corresponding path program 1 times [2019-11-06 18:52:27,625 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:52:27,625 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542257753] [2019-11-06 18:52:27,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:52:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:52:27,749 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542257753] [2019-11-06 18:52:27,749 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912230513] [2019-11-06 18:52:27,749 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 18:52:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:27,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:52:27,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:52:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:52:27,890 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:52:27,895 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-06 18:52:27,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588370772] [2019-11-06 18:52:27,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:52:27,897 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:52:27,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:52:27,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:52:27,898 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 7 states. [2019-11-06 18:52:28,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:52:28,034 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2019-11-06 18:52:28,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:52:28,035 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-06 18:52:28,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:52:28,037 INFO L225 Difference]: With dead ends: 41 [2019-11-06 18:52:28,037 INFO L226 Difference]: Without dead ends: 27 [2019-11-06 18:52:28,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:52:28,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-06 18:52:28,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-11-06 18:52:28,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 18:52:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-11-06 18:52:28,052 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 17 [2019-11-06 18:52:28,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:52:28,052 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-11-06 18:52:28,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:52:28,052 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-11-06 18:52:28,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:52:28,053 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:52:28,053 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:52:28,259 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:52:28,260 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:52:28,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:52:28,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1840475722, now seen corresponding path program 2 times [2019-11-06 18:52:28,262 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:52:28,262 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219677062] [2019-11-06 18:52:28,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:52:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:52:28,542 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219677062] [2019-11-06 18:52:28,542 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096109845] [2019-11-06 18:52:28,542 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:52:28,590 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:52:28,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:52:28,592 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 18:52:28,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:52:28,648 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 15 treesize of output 11 [2019-11-06 18:52:28,648 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:28,657 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:28,658 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:52:28,658 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2019-11-06 18:52:28,687 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:52:28,689 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 23 treesize of output 22 [2019-11-06 18:52:28,690 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:28,703 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:28,704 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 18:52:28,705 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:25 [2019-11-06 18:52:28,795 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:52:28,796 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:28,797 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2019-11-06 18:52:28,798 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:28,804 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:28,805 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 18:52:28,805 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:3 [2019-11-06 18:52:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:52:28,844 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:52:28,844 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2019-11-06 18:52:28,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573816012] [2019-11-06 18:52:28,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:52:28,845 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:52:28,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:52:28,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:52:28,846 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 15 states. [2019-11-06 18:52:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:52:30,403 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-11-06 18:52:30,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:52:30,405 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-11-06 18:52:30,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:52:30,408 INFO L225 Difference]: With dead ends: 47 [2019-11-06 18:52:30,408 INFO L226 Difference]: Without dead ends: 45 [2019-11-06 18:52:30,409 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:52:30,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-06 18:52:30,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2019-11-06 18:52:30,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 18:52:30,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-11-06 18:52:30,423 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 20 [2019-11-06 18:52:30,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:52:30,423 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-11-06 18:52:30,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:52:30,423 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-11-06 18:52:30,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 18:52:30,424 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:52:30,425 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:52:30,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:52:30,629 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:52:30,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:52:30,630 INFO L82 PathProgramCache]: Analyzing trace with hash -618905122, now seen corresponding path program 1 times [2019-11-06 18:52:30,631 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:52:30,631 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3173143] [2019-11-06 18:52:30,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:52:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:30,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:52:30,830 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3173143] [2019-11-06 18:52:30,830 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587607594] [2019-11-06 18:52:30,830 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 18:52:30,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:30,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 18:52:30,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:52:30,906 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 15 treesize of output 11 [2019-11-06 18:52:30,906 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:30,912 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:30,913 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 18:52:30,914 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-11-06 18:52:33,003 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 23 treesize of output 7 [2019-11-06 18:52:33,003 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:33,012 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:33,013 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:52:33,013 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:29, output treesize:3 [2019-11-06 18:52:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:52:33,054 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:52:33,054 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2019-11-06 18:52:33,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991179912] [2019-11-06 18:52:33,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:52:33,055 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:52:33,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:52:33,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=172, Unknown=1, NotChecked=0, Total=210 [2019-11-06 18:52:33,056 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 15 states. [2019-11-06 18:52:39,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:52:39,526 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2019-11-06 18:52:39,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:52:39,527 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2019-11-06 18:52:39,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:52:39,528 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:52:39,528 INFO L226 Difference]: Without dead ends: 44 [2019-11-06 18:52:39,529 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=84, Invalid=376, Unknown=2, NotChecked=0, Total=462 [2019-11-06 18:52:39,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-06 18:52:39,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2019-11-06 18:52:39,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 18:52:39,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2019-11-06 18:52:39,538 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 28 [2019-11-06 18:52:39,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:52:39,539 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2019-11-06 18:52:39,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:52:39,539 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2019-11-06 18:52:39,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-06 18:52:39,540 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:52:39,540 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:52:39,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:52:39,745 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:52:39,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:52:39,746 INFO L82 PathProgramCache]: Analyzing trace with hash 2140291442, now seen corresponding path program 2 times [2019-11-06 18:52:39,746 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:52:39,747 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223577044] [2019-11-06 18:52:39,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:52:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:39,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:52:39,875 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223577044] [2019-11-06 18:52:39,876 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811648931] [2019-11-06 18:52:39,876 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 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 18:52:39,921 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:52:39,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:52:39,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:52:39,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:52:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:52:39,977 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:52:39,977 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-11-06 18:52:39,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296128276] [2019-11-06 18:52:39,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:52:39,978 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:52:39,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:52:39,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:52:39,979 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 14 states. [2019-11-06 18:52:40,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:52:40,274 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2019-11-06 18:52:40,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:52:40,276 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-11-06 18:52:40,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:52:40,277 INFO L225 Difference]: With dead ends: 96 [2019-11-06 18:52:40,277 INFO L226 Difference]: Without dead ends: 50 [2019-11-06 18:52:40,279 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:52:40,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-06 18:52:40,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2019-11-06 18:52:40,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-06 18:52:40,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2019-11-06 18:52:40,292 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 36 [2019-11-06 18:52:40,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:52:40,292 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2019-11-06 18:52:40,292 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:52:40,293 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2019-11-06 18:52:40,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 18:52:40,294 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:52:40,294 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:52:40,499 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:52:40,500 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:52:40,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:52:40,500 INFO L82 PathProgramCache]: Analyzing trace with hash -324382690, now seen corresponding path program 3 times [2019-11-06 18:52:40,501 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:52:40,501 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274426420] [2019-11-06 18:52:40,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:52:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:40,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:52:40,746 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274426420] [2019-11-06 18:52:40,746 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278725110] [2019-11-06 18:52:40,746 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 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 18:52:40,800 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 18:52:40,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:52:40,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 18:52:40,803 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:52:40,814 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 15 treesize of output 11 [2019-11-06 18:52:40,815 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:40,821 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:40,822 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 18:52:40,822 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-11-06 18:52:48,945 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 23 treesize of output 7 [2019-11-06 18:52:48,946 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:48,955 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:48,956 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:52:48,956 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:29, output treesize:3 [2019-11-06 18:52:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:52:48,992 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:52:48,992 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 18 [2019-11-06 18:52:48,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866088083] [2019-11-06 18:52:48,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:52:48,993 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:52:48,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:52:48,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=257, Unknown=2, NotChecked=0, Total=306 [2019-11-06 18:52:48,994 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 18 states. [2019-11-06 18:52:57,140 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 23 [2019-11-06 18:52:57,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:52:57,566 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2019-11-06 18:52:57,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:52:57,566 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2019-11-06 18:52:57,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:52:57,568 INFO L225 Difference]: With dead ends: 57 [2019-11-06 18:52:57,568 INFO L226 Difference]: Without dead ends: 55 [2019-11-06 18:52:57,569 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=105, Invalid=594, Unknown=3, NotChecked=0, Total=702 [2019-11-06 18:52:57,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-06 18:52:57,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2019-11-06 18:52:57,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 18:52:57,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2019-11-06 18:52:57,580 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 39 [2019-11-06 18:52:57,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:52:57,580 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2019-11-06 18:52:57,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:52:57,580 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2019-11-06 18:52:57,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 18:52:57,581 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:52:57,582 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:52:57,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:52:57,790 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:52:57,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:52:57,791 INFO L82 PathProgramCache]: Analyzing trace with hash -229765198, now seen corresponding path program 4 times [2019-11-06 18:52:57,791 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:52:57,792 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090088907] [2019-11-06 18:52:57,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:52:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:52:57,927 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090088907] [2019-11-06 18:52:57,927 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521366523] [2019-11-06 18:52:57,927 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 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 [2019-11-06 18:52:57,969 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:52:57,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:52:57,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:52:57,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:52:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:52:58,071 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:52:58,071 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2019-11-06 18:52:58,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405352437] [2019-11-06 18:52:58,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 18:52:58,072 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:52:58,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 18:52:58,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:52:58,073 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 17 states. [2019-11-06 18:52:58,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:52:58,360 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2019-11-06 18:52:58,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:52:58,361 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2019-11-06 18:52:58,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:52:58,362 INFO L225 Difference]: With dead ends: 123 [2019-11-06 18:52:58,362 INFO L226 Difference]: Without dead ends: 61 [2019-11-06 18:52:58,363 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:52:58,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-06 18:52:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2019-11-06 18:52:58,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-06 18:52:58,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2019-11-06 18:52:58,395 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 47 [2019-11-06 18:52:58,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:52:58,396 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2019-11-06 18:52:58,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 18:52:58,396 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2019-11-06 18:52:58,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 18:52:58,400 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:52:58,400 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:52:58,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:52:58,601 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:52:58,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:52:58,602 INFO L82 PathProgramCache]: Analyzing trace with hash -929276538, now seen corresponding path program 5 times [2019-11-06 18:52:58,602 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:52:58,603 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262861893] [2019-11-06 18:52:58,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:52:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:52:58,856 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262861893] [2019-11-06 18:52:58,857 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861884818] [2019-11-06 18:52:58,857 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 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 [2019-11-06 18:52:58,926 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-06 18:52:58,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:52:58,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-06 18:52:58,930 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:52:59,031 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 13 treesize of output 9 [2019-11-06 18:52:59,031 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:59,036 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:59,037 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:52:59,037 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-06 18:52:59,333 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 18:52:59,333 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:59,335 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:59,335 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 18:52:59,335 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-11-06 18:52:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:52:59,376 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:52:59,376 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2019-11-06 18:52:59,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120545167] [2019-11-06 18:52:59,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:52:59,377 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:52:59,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:52:59,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:52:59,378 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 28 states. [2019-11-06 18:53:00,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:00,034 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2019-11-06 18:53:00,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:53:00,035 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 50 [2019-11-06 18:53:00,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:00,036 INFO L225 Difference]: With dead ends: 68 [2019-11-06 18:53:00,036 INFO L226 Difference]: Without dead ends: 66 [2019-11-06 18:53:00,037 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2019-11-06 18:53:00,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-06 18:53:00,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2019-11-06 18:53:00,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-06 18:53:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2019-11-06 18:53:00,046 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 50 [2019-11-06 18:53:00,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:00,047 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2019-11-06 18:53:00,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:53:00,047 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2019-11-06 18:53:00,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-06 18:53:00,048 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:00,048 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:00,252 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:00,252 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:00,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:00,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1907373338, now seen corresponding path program 6 times [2019-11-06 18:53:00,253 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:00,254 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450093443] [2019-11-06 18:53:00,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:00,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:00,395 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 35 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-06 18:53:00,395 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450093443] [2019-11-06 18:53:00,395 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077577348] [2019-11-06 18:53:00,396 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 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 [2019-11-06 18:53:00,442 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-06 18:53:00,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:53:00,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:53:00,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 40 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-06 18:53:00,548 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:53:00,548 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2019-11-06 18:53:00,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245638637] [2019-11-06 18:53:00,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:53:00,549 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:00,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:53:00,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:53:00,550 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 20 states. [2019-11-06 18:53:00,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:00,878 INFO L93 Difference]: Finished difference Result 150 states and 157 transitions. [2019-11-06 18:53:00,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:53:00,879 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2019-11-06 18:53:00,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:00,880 INFO L225 Difference]: With dead ends: 150 [2019-11-06 18:53:00,880 INFO L226 Difference]: Without dead ends: 72 [2019-11-06 18:53:00,881 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2019-11-06 18:53:00,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-06 18:53:00,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2019-11-06 18:53:00,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-06 18:53:00,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2019-11-06 18:53:00,891 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 58 [2019-11-06 18:53:00,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:00,892 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2019-11-06 18:53:00,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:53:00,892 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2019-11-06 18:53:00,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-06 18:53:00,893 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:00,893 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:01,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:01,107 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:01,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:01,107 INFO L82 PathProgramCache]: Analyzing trace with hash 209500870, now seen corresponding path program 7 times [2019-11-06 18:53:01,108 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:01,108 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812863350] [2019-11-06 18:53:01,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 8 proven. 67 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-06 18:53:01,376 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812863350] [2019-11-06 18:53:01,376 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015475523] [2019-11-06 18:53:01,377 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 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 [2019-11-06 18:53:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:01,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-06 18:53:01,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:01,462 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 15 treesize of output 11 [2019-11-06 18:53:01,462 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:01,468 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:01,469 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 18:53:01,469 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18