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 0.1.24-13a467a-m [2019-10-14 21:49:39,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:49:39,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:49:39,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:49:39,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:49:39,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:49:39,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:49:39,506 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:49:39,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:49:39,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:49:39,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:49:39,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:49:39,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:49:39,512 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:49:39,513 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:49:39,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:49:39,515 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:49:39,516 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:49:39,518 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:49:39,520 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:49:39,521 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:49:39,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:49:39,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:49:39,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:49:39,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:49:39,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:49:39,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:49:39,528 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:49:39,529 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:49:39,530 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:49:39,530 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:49:39,531 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:49:39,532 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:49:39,532 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:49:39,533 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:49:39,534 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:49:39,534 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:49:39,535 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:49:39,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:49:39,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:49:39,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:49:39,537 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 [2019-10-14 21:49:39,555 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:49:39,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:49:39,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:49:39,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:49:39,557 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:49:39,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:49:39,558 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:49:39,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:49:39,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:49:39,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:49:39,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:49:39,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:49:39,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:49:39,560 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:49:39,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:49:39,561 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:49:39,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:49:39,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:49:39,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:49:39,563 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:49:39,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:49:39,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:49:39,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:49:39,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:49:39,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:49:39,564 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:49:39,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:49:39,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:49:39,565 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:49:39,890 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:49:39,910 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:49:39,913 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:49:39,915 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:49:39,915 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:49:39,916 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mlceu.c [2019-10-14 21:49:39,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8114b726/0fb09f86224b459e9b9576f240bc6999/FLAG52331ed99 [2019-10-14 21:49:40,452 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:49:40,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mlceu.c [2019-10-14 21:49:40,460 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8114b726/0fb09f86224b459e9b9576f240bc6999/FLAG52331ed99 [2019-10-14 21:49:40,831 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8114b726/0fb09f86224b459e9b9576f240bc6999 [2019-10-14 21:49:40,841 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:49:40,843 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:49:40,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:49:40,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:49:40,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:49:40,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:49:40" (1/1) ... [2019-10-14 21:49:40,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6912290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:40, skipping insertion in model container [2019-10-14 21:49:40,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:49:40" (1/1) ... [2019-10-14 21:49:40,860 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:49:40,877 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:49:41,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:49:41,092 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:49:41,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:49:41,122 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:49:41,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:41 WrapperNode [2019-10-14 21:49:41,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:49:41,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:49:41,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:49:41,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:49:41,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:41" (1/1) ... [2019-10-14 21:49:41,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:41" (1/1) ... [2019-10-14 21:49:41,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:41" (1/1) ... [2019-10-14 21:49:41,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:41" (1/1) ... [2019-10-14 21:49:41,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:41" (1/1) ... [2019-10-14 21:49:41,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:41" (1/1) ... [2019-10-14 21:49:41,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:41" (1/1) ... [2019-10-14 21:49:41,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:49:41,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:49:41,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:49:41,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:49:41,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:41" (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 [2019-10-14 21:49:41,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:49:41,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:49:41,310 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:49:41,311 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:49:41,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:49:41,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 21:49:41,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:49:41,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:49:41,311 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 21:49:41,311 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:49:41,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 21:49:41,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:49:41,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:49:41,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:49:41,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:49:41,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:49:41,626 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:49:41,627 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-14 21:49:41,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:49:41 BoogieIcfgContainer [2019-10-14 21:49:41,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:49:41,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:49:41,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:49:41,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:49:41,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:49:40" (1/3) ... [2019-10-14 21:49:41,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22328d86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:49:41, skipping insertion in model container [2019-10-14 21:49:41,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:41" (2/3) ... [2019-10-14 21:49:41,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22328d86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:49:41, skipping insertion in model container [2019-10-14 21:49:41,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:49:41" (3/3) ... [2019-10-14 21:49:41,637 INFO L109 eAbstractionObserver]: Analyzing ICFG mlceu.c [2019-10-14 21:49:41,647 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:49:41,657 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:49:41,669 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:49:41,701 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:49:41,701 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:49:41,701 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:49:41,701 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:49:41,702 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:49:41,702 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:49:41,702 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:49:41,702 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:49:41,718 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-10-14 21:49:41,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 21:49:41,723 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:41,724 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:41,726 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:41,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:41,732 INFO L82 PathProgramCache]: Analyzing trace with hash 163391893, now seen corresponding path program 1 times [2019-10-14 21:49:41,739 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:41,739 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231977252] [2019-10-14 21:49:41,740 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:41,740 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:41,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:41,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:49:41,930 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231977252] [2019-10-14 21:49:41,931 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:49:41,931 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:49:41,932 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640264946] [2019-10-14 21:49:41,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:49:41,937 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:41,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:49:41,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:49:41,956 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2019-10-14 21:49:42,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:42,103 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2019-10-14 21:49:42,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:49:42,107 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-14 21:49:42,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:42,120 INFO L225 Difference]: With dead ends: 42 [2019-10-14 21:49:42,120 INFO L226 Difference]: Without dead ends: 21 [2019-10-14 21:49:42,128 INFO L600 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 [2019-10-14 21:49:42,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-14 21:49:42,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-14 21:49:42,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 21:49:42,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-10-14 21:49:42,193 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 14 [2019-10-14 21:49:42,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:42,195 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-10-14 21:49:42,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:49:42,196 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-10-14 21:49:42,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 21:49:42,198 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:42,198 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:42,199 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:42,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:42,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1009214006, now seen corresponding path program 1 times [2019-10-14 21:49:42,201 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:42,201 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822011588] [2019-10-14 21:49:42,201 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:42,202 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:42,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:42,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:42,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:49:42,397 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822011588] [2019-10-14 21:49:42,398 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:49:42,398 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:49:42,398 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89373088] [2019-10-14 21:49:42,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:49:42,401 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:42,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:49:42,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:49:42,403 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2019-10-14 21:49:42,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:42,496 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2019-10-14 21:49:42,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:49:42,498 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-14 21:49:42,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:42,499 INFO L225 Difference]: With dead ends: 38 [2019-10-14 21:49:42,499 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 21:49:42,500 INFO L600 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 [2019-10-14 21:49:42,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 21:49:42,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-10-14 21:49:42,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 21:49:42,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-14 21:49:42,508 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2019-10-14 21:49:42,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:42,509 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-14 21:49:42,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:49:42,509 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-14 21:49:42,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:49:42,510 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:42,510 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:42,511 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:42,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:42,511 INFO L82 PathProgramCache]: Analyzing trace with hash 545846646, now seen corresponding path program 1 times [2019-10-14 21:49:42,511 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:42,512 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055067498] [2019-10-14 21:49:42,512 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:42,512 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:42,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:42,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:49:42,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055067498] [2019-10-14 21:49:42,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404212] [2019-10-14 21:49:42,631 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 [2019-10-14 21:49:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:42,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:49:42,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:49:42,783 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:49:42,784 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 21:49:42,784 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173186298] [2019-10-14 21:49:42,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:49:42,788 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:42,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:49:42,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:49:42,789 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 7 states. [2019-10-14 21:49:42,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:42,922 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2019-10-14 21:49:42,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:49:42,924 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-10-14 21:49:42,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:42,925 INFO L225 Difference]: With dead ends: 41 [2019-10-14 21:49:42,926 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 21:49:42,927 INFO L600 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 [2019-10-14 21:49:42,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 21:49:42,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-10-14 21:49:42,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:49:42,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-10-14 21:49:42,940 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 17 [2019-10-14 21:49:42,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:42,940 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-10-14 21:49:42,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:49:42,941 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-10-14 21:49:42,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:49:42,942 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:42,942 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:43,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:43,147 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:43,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:43,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1840475722, now seen corresponding path program 2 times [2019-10-14 21:49:43,149 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:43,150 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571906780] [2019-10-14 21:49:43,150 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:43,150 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:43,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:43,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:49:43,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571906780] [2019-10-14 21:49:43,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720792655] [2019-10-14 21:49:43,440 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 [2019-10-14 21:49:43,492 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:49:43,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:43,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 21:49:43,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:43,536 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 [2019-10-14 21:49:43,537 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:49:43,550 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:49:43,551 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:49:43,551 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2019-10-14 21:49:43,583 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:49:43,584 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 [2019-10-14 21:49:43,585 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:49:43,596 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:49:43,597 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. [2019-10-14 21:49:43,597 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:25 [2019-10-14 21:49:43,689 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:49:43,690 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:49:43,691 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 [2019-10-14 21:49:43,692 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:49:43,696 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:49:43,697 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:49:43,697 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:3 [2019-10-14 21:49:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:49:43,730 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:49:43,730 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2019-10-14 21:49:43,731 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680251226] [2019-10-14 21:49:43,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:49:43,731 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:43,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:49:43,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:49:43,733 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 15 states. [2019-10-14 21:49:45,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:45,314 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-10-14 21:49:45,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:49:45,314 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-10-14 21:49:45,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:45,317 INFO L225 Difference]: With dead ends: 47 [2019-10-14 21:49:45,318 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 21:49:45,319 INFO L600 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 [2019-10-14 21:49:45,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 21:49:45,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2019-10-14 21:49:45,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 21:49:45,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-14 21:49:45,333 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 20 [2019-10-14 21:49:45,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:45,334 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-14 21:49:45,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:49:45,334 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-14 21:49:45,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 21:49:45,335 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:45,335 INFO L380 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] [2019-10-14 21:49:45,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:45,539 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:45,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:45,540 INFO L82 PathProgramCache]: Analyzing trace with hash -618905122, now seen corresponding path program 1 times [2019-10-14 21:49:45,541 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:45,541 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957399178] [2019-10-14 21:49:45,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:45,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:45,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:49:45,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957399178] [2019-10-14 21:49:45,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948906832] [2019-10-14 21:49:45,766 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 [2019-10-14 21:49:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:45,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 21:49:45,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:45,853 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 [2019-10-14 21:49:45,854 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:49:45,864 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:49:45,865 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. [2019-10-14 21:49:45,865 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-10-14 21:49:47,923 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 [2019-10-14 21:49:47,924 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:49:47,930 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:49:47,931 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:49:47,931 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:29, output treesize:3 [2019-10-14 21:49:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:49:47,962 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:49:47,962 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2019-10-14 21:49:47,962 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266381770] [2019-10-14 21:49:47,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:49:47,963 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:47,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:49:47,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=172, Unknown=1, NotChecked=0, Total=210 [2019-10-14 21:49:47,964 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 15 states. [2019-10-14 21:49:54,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:54,407 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2019-10-14 21:49:54,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:49:54,409 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2019-10-14 21:49:54,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:54,410 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:49:54,411 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 21:49:54,411 INFO L600 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 [2019-10-14 21:49:54,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 21:49:54,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2019-10-14 21:49:54,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:49:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2019-10-14 21:49:54,431 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 28 [2019-10-14 21:49:54,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:54,432 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2019-10-14 21:49:54,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:49:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2019-10-14 21:49:54,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 21:49:54,434 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:54,434 INFO L380 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] [2019-10-14 21:49:54,638 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:54,638 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:54,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:54,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2140291442, now seen corresponding path program 2 times [2019-10-14 21:49:54,639 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:54,639 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409999207] [2019-10-14 21:49:54,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:54,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:54,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:49:54,759 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409999207] [2019-10-14 21:49:54,759 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525061063] [2019-10-14 21:49:54,759 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 21:49:54,803 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:49:54,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:54,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:49:54,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:49:54,874 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:49:54,874 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-14 21:49:54,875 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169993462] [2019-10-14 21:49:54,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:49:54,875 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:54,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:49:54,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:49:54,876 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 14 states. [2019-10-14 21:49:55,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:55,186 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2019-10-14 21:49:55,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:49:55,186 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-10-14 21:49:55,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:55,188 INFO L225 Difference]: With dead ends: 96 [2019-10-14 21:49:55,188 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 21:49:55,189 INFO L600 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 [2019-10-14 21:49:55,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 21:49:55,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2019-10-14 21:49:55,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 21:49:55,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2019-10-14 21:49:55,199 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 36 [2019-10-14 21:49:55,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:55,200 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2019-10-14 21:49:55,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:49:55,200 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2019-10-14 21:49:55,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:49:55,201 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:55,202 INFO L380 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] [2019-10-14 21:49:55,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:55,407 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:55,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:55,407 INFO L82 PathProgramCache]: Analyzing trace with hash -324382690, now seen corresponding path program 3 times [2019-10-14 21:49:55,408 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:55,408 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088982311] [2019-10-14 21:49:55,408 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:55,408 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:55,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:49:55,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088982311] [2019-10-14 21:49:55,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695022590] [2019-10-14 21:49:55,603 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 [2019-10-14 21:49:55,659 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 21:49:55,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:55,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 21:49:55,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:55,687 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 [2019-10-14 21:49:55,688 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:49:55,704 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:49:55,704 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. [2019-10-14 21:49:55,705 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-10-14 21:50:03,847 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 [2019-10-14 21:50:03,848 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:03,853 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:03,854 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:03,854 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:29, output treesize:3 [2019-10-14 21:50:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:50:03,887 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:50:03,888 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 18 [2019-10-14 21:50:03,888 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771006920] [2019-10-14 21:50:03,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:50:03,889 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:03,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:50:03,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=257, Unknown=2, NotChecked=0, Total=306 [2019-10-14 21:50:03,890 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 18 states. [2019-10-14 21:50:12,012 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 23 [2019-10-14 21:50:12,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:12,485 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2019-10-14 21:50:12,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:50:12,486 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2019-10-14 21:50:12,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:12,488 INFO L225 Difference]: With dead ends: 57 [2019-10-14 21:50:12,488 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 21:50:12,489 INFO L600 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 [2019-10-14 21:50:12,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 21:50:12,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2019-10-14 21:50:12,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:50:12,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2019-10-14 21:50:12,499 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 39 [2019-10-14 21:50:12,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:12,499 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2019-10-14 21:50:12,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:50:12,500 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2019-10-14 21:50:12,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 21:50:12,501 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:12,501 INFO L380 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] [2019-10-14 21:50:12,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:12,705 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:12,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:12,706 INFO L82 PathProgramCache]: Analyzing trace with hash -229765198, now seen corresponding path program 4 times [2019-10-14 21:50:12,706 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:12,707 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422645140] [2019-10-14 21:50:12,707 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:12,707 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:12,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:12,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:50:12,853 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422645140] [2019-10-14 21:50:12,854 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999513530] [2019-10-14 21:50:12,854 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 [2019-10-14 21:50:12,898 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:50:12,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:50:12,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:50:12,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:12,986 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:50:12,986 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:50:12,987 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2019-10-14 21:50:12,987 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405707441] [2019-10-14 21:50:12,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:50:12,988 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:12,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:50:12,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:50:12,989 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 17 states. [2019-10-14 21:50:13,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:13,307 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2019-10-14 21:50:13,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:50:13,307 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2019-10-14 21:50:13,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:13,309 INFO L225 Difference]: With dead ends: 123 [2019-10-14 21:50:13,309 INFO L226 Difference]: Without dead ends: 61 [2019-10-14 21:50:13,310 INFO L600 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 [2019-10-14 21:50:13,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-14 21:50:13,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2019-10-14 21:50:13,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-14 21:50:13,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2019-10-14 21:50:13,319 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 47 [2019-10-14 21:50:13,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:13,319 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2019-10-14 21:50:13,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:50:13,319 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2019-10-14 21:50:13,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 21:50:13,320 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:13,320 INFO L380 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] [2019-10-14 21:50:13,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:13,524 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:13,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:13,525 INFO L82 PathProgramCache]: Analyzing trace with hash -929276538, now seen corresponding path program 5 times [2019-10-14 21:50:13,525 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:13,525 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644810453] [2019-10-14 21:50:13,525 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:13,526 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:13,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:50:13,779 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644810453] [2019-10-14 21:50:13,779 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077633045] [2019-10-14 21:50:13,780 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 [2019-10-14 21:50:13,835 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-14 21:50:13,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:50:13,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 21:50:13,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:13,938 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 [2019-10-14 21:50:13,938 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:13,942 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:13,943 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:13,943 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-10-14 21:50:14,274 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 [2019-10-14 21:50:14,275 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:14,281 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:14,281 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:14,281 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-14 21:50:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:50:14,336 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:50:14,336 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2019-10-14 21:50:14,336 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169765251] [2019-10-14 21:50:14,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:50:14,337 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:14,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:50:14,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:50:14,338 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 28 states. [2019-10-14 21:50:14,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:14,992 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2019-10-14 21:50:14,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:50:14,993 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 50 [2019-10-14 21:50:14,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:14,994 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:50:14,994 INFO L226 Difference]: Without dead ends: 66 [2019-10-14 21:50:14,996 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:50:14,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-14 21:50:15,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2019-10-14 21:50:15,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-14 21:50:15,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2019-10-14 21:50:15,005 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 50 [2019-10-14 21:50:15,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:15,005 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2019-10-14 21:50:15,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:50:15,006 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2019-10-14 21:50:15,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-14 21:50:15,007 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:15,007 INFO L380 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] [2019-10-14 21:50:15,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:15,211 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:15,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:15,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1907373338, now seen corresponding path program 6 times [2019-10-14 21:50:15,212 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:15,212 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547701835] [2019-10-14 21:50:15,212 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:15,212 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:15,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 35 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:50:15,351 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547701835] [2019-10-14 21:50:15,351 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809325112] [2019-10-14 21:50:15,351 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 [2019-10-14 21:50:15,399 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-14 21:50:15,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:50:15,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:50:15,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 40 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:50:15,500 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:50:15,500 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2019-10-14 21:50:15,500 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351172244] [2019-10-14 21:50:15,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:50:15,501 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:15,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:50:15,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:50:15,502 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 20 states. [2019-10-14 21:50:15,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:15,834 INFO L93 Difference]: Finished difference Result 150 states and 157 transitions. [2019-10-14 21:50:15,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:50:15,835 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2019-10-14 21:50:15,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:15,838 INFO L225 Difference]: With dead ends: 150 [2019-10-14 21:50:15,838 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 21:50:15,839 INFO L600 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 [2019-10-14 21:50:15,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 21:50:15,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2019-10-14 21:50:15,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 21:50:15,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2019-10-14 21:50:15,860 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 58 [2019-10-14 21:50:15,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:15,860 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2019-10-14 21:50:15,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:50:15,862 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2019-10-14 21:50:15,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-14 21:50:15,863 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:15,863 INFO L380 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] [2019-10-14 21:50:16,065 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:16,066 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:16,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:16,067 INFO L82 PathProgramCache]: Analyzing trace with hash 209500870, now seen corresponding path program 7 times [2019-10-14 21:50:16,067 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:16,067 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424792245] [2019-10-14 21:50:16,068 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:16,068 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:16,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:16,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 8 proven. 67 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:50:16,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424792245] [2019-10-14 21:50:16,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6146304] [2019-10-14 21:50:16,300 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 [2019-10-14 21:50:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:16,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 21:50:16,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:16,361 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 [2019-10-14 21:50:16,361 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:16,367 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:16,368 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. [2019-10-14 21:50:16,368 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18