/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-multidimensional/add-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:39:00,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:39:00,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:39:00,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:39:00,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:39:00,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:39:00,346 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:39:00,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:39:00,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:39:00,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:39:00,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:39:00,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:39:00,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:39:00,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:39:00,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:39:00,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:39:00,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:39:00,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:39:00,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:39:00,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:39:00,389 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:39:00,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:39:00,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:39:00,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:39:00,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:39:00,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:39:00,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:39:00,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:39:00,416 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:39:00,435 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:39:00,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:39:00,440 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:39:00,440 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:39:00,440 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:39:00,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:39:00,441 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:39:00,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:39:00,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:39:00,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:39:00,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:39:00,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:39:00,443 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:39:00,444 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:39:00,444 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:39:00,444 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:39:00,444 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:39:00,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:39:00,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:39:00,445 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:39:00,445 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:39:00,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:39:00,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:39:00,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:39:00,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:39:00,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:39:00,446 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:39:00,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:39:00,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:39:00,447 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:39:00,761 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:39:00,779 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:39:00,783 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:39:00,784 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:39:00,785 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:39:00,785 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/add-2-n-u.c [2019-11-23 20:39:00,840 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e9e2cf69/1736ba886a7f4f728551026071565dab/FLAG8209ddb73 [2019-11-23 20:39:01,298 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:39:01,299 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/add-2-n-u.c [2019-11-23 20:39:01,308 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e9e2cf69/1736ba886a7f4f728551026071565dab/FLAG8209ddb73 [2019-11-23 20:39:01,680 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e9e2cf69/1736ba886a7f4f728551026071565dab [2019-11-23 20:39:01,691 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:39:01,692 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:39:01,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:39:01,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:39:01,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:39:01,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:39:01" (1/1) ... [2019-11-23 20:39:01,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dc62c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:01, skipping insertion in model container [2019-11-23 20:39:01,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:39:01" (1/1) ... [2019-11-23 20:39:01,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:39:01,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:39:01,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:39:01,909 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:39:01,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:39:01,961 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:39:01,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:01 WrapperNode [2019-11-23 20:39:01,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:39:01,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:39:01,963 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:39:01,963 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:39:02,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:01" (1/1) ... [2019-11-23 20:39:02,071 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:01" (1/1) ... [2019-11-23 20:39:02,105 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:39:02,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:39:02,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:39:02,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:39:02,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:01" (1/1) ... [2019-11-23 20:39:02,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:01" (1/1) ... [2019-11-23 20:39:02,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:01" (1/1) ... [2019-11-23 20:39:02,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:01" (1/1) ... [2019-11-23 20:39:02,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:01" (1/1) ... [2019-11-23 20:39:02,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:01" (1/1) ... [2019-11-23 20:39:02,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:01" (1/1) ... [2019-11-23 20:39:02,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:39:02,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:39:02,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:39:02,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:39:02,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:39:02,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:39:02,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:39:02,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:39:02,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:39:02,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:39:02,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:39:02,509 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:39:02,509 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 20:39:02,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:39:02 BoogieIcfgContainer [2019-11-23 20:39:02,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:39:02,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:39:02,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:39:02,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:39:02,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:39:01" (1/3) ... [2019-11-23 20:39:02,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9f312c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:39:02, skipping insertion in model container [2019-11-23 20:39:02,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:01" (2/3) ... [2019-11-23 20:39:02,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9f312c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:39:02, skipping insertion in model container [2019-11-23 20:39:02,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:39:02" (3/3) ... [2019-11-23 20:39:02,523 INFO L109 eAbstractionObserver]: Analyzing ICFG add-2-n-u.c [2019-11-23 20:39:02,541 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:39:02,547 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:39:02,567 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:39:02,593 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:39:02,593 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:39:02,593 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:39:02,593 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:39:02,593 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:39:02,594 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:39:02,594 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:39:02,594 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:39:02,608 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-23 20:39:02,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:39:02,613 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:02,614 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:02,614 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:02,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:02,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1817636276, now seen corresponding path program 1 times [2019-11-23 20:39:02,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:02,628 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917587454] [2019-11-23 20:39:02,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:02,703 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:02,704 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1141082275] [2019-11-23 20:39:02,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:02,766 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:39:02,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:02,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917587454] [2019-11-23 20:39:02,829 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:02,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141082275] [2019-11-23 20:39:02,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:39:02,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:39:02,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172880062] [2019-11-23 20:39:02,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:39:02,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:02,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:39:02,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:39:02,854 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-11-23 20:39:02,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:02,933 INFO L93 Difference]: Finished difference Result 43 states and 71 transitions. [2019-11-23 20:39:02,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:39:02,936 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:39:02,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:02,952 INFO L225 Difference]: With dead ends: 43 [2019-11-23 20:39:02,953 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:39:02,958 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:39:02,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:39:02,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2019-11-23 20:39:02,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 20:39:02,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2019-11-23 20:39:02,993 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 10 [2019-11-23 20:39:02,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:02,993 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2019-11-23 20:39:02,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:39:02,994 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2019-11-23 20:39:02,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:39:02,994 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:02,995 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:03,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:03,201 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:03,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:03,201 INFO L82 PathProgramCache]: Analyzing trace with hash 429030367, now seen corresponding path program 1 times [2019-11-23 20:39:03,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:03,202 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955677279] [2019-11-23 20:39:03,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:03,216 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:03,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316003503] [2019-11-23 20:39:03,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:03,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:39:03,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:03,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955677279] [2019-11-23 20:39:03,290 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:03,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316003503] [2019-11-23 20:39:03,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:39:03,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:39:03,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792078625] [2019-11-23 20:39:03,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:39:03,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:03,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:39:03,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:39:03,294 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand 4 states. [2019-11-23 20:39:03,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:03,356 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2019-11-23 20:39:03,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:39:03,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-23 20:39:03,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:03,357 INFO L225 Difference]: With dead ends: 43 [2019-11-23 20:39:03,358 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:39:03,359 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:39:03,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:39:03,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2019-11-23 20:39:03,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:39:03,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2019-11-23 20:39:03,366 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 13 [2019-11-23 20:39:03,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:03,366 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2019-11-23 20:39:03,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:39:03,366 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2019-11-23 20:39:03,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:39:03,367 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:03,367 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:03,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:03,568 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:03,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:03,569 INFO L82 PathProgramCache]: Analyzing trace with hash -270581085, now seen corresponding path program 1 times [2019-11-23 20:39:03,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:03,569 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426293002] [2019-11-23 20:39:03,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:03,575 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:03,575 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826858381] [2019-11-23 20:39:03,575 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 [2019-11-23 20:39:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:03,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:39:03,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:03,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426293002] [2019-11-23 20:39:03,666 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:03,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826858381] [2019-11-23 20:39:03,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:39:03,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:39:03,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951834804] [2019-11-23 20:39:03,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:39:03,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:03,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:39:03,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:39:03,669 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 5 states. [2019-11-23 20:39:03,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:03,754 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2019-11-23 20:39:03,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:39:03,755 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-23 20:39:03,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:03,756 INFO L225 Difference]: With dead ends: 53 [2019-11-23 20:39:03,756 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 20:39:03,757 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:39:03,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 20:39:03,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2019-11-23 20:39:03,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:39:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-11-23 20:39:03,765 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2019-11-23 20:39:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:03,765 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-11-23 20:39:03,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:39:03,766 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-11-23 20:39:03,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:39:03,766 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:03,767 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:03,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:03,970 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:03,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:03,971 INFO L82 PathProgramCache]: Analyzing trace with hash -483699617, now seen corresponding path program 2 times [2019-11-23 20:39:03,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:03,972 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457766405] [2019-11-23 20:39:03,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:03,978 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:03,979 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57262887] [2019-11-23 20:39:03,979 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 [2019-11-23 20:39:04,041 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:39:04,041 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:04,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:39:04,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:39:04,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457766405] [2019-11-23 20:39:04,065 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:04,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57262887] [2019-11-23 20:39:04,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:39:04,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:39:04,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960057314] [2019-11-23 20:39:04,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:39:04,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:04,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:39:04,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:39:04,067 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 4 states. [2019-11-23 20:39:04,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:04,138 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2019-11-23 20:39:04,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:39:04,141 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 20:39:04,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:04,142 INFO L225 Difference]: With dead ends: 58 [2019-11-23 20:39:04,142 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:39:04,145 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:39:04,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:39:04,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 27. [2019-11-23 20:39:04,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:39:04,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2019-11-23 20:39:04,160 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 15 [2019-11-23 20:39:04,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:04,160 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2019-11-23 20:39:04,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:39:04,160 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2019-11-23 20:39:04,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:39:04,162 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:04,162 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:04,366 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:04,366 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:04,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:04,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1009156328, now seen corresponding path program 1 times [2019-11-23 20:39:04,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:04,367 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817825416] [2019-11-23 20:39:04,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:04,373 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:04,373 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780962621] [2019-11-23 20:39:04,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:04,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:39:04,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:39:04,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817825416] [2019-11-23 20:39:04,458 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:04,458 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780962621] [2019-11-23 20:39:04,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:39:04,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 20:39:04,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086609614] [2019-11-23 20:39:04,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:39:04,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:04,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:39:04,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:39:04,460 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 6 states. [2019-11-23 20:39:04,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:04,554 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2019-11-23 20:39:04,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:39:04,555 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-11-23 20:39:04,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:04,556 INFO L225 Difference]: With dead ends: 65 [2019-11-23 20:39:04,556 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:39:04,557 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:39:04,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:39:04,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2019-11-23 20:39:04,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:39:04,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2019-11-23 20:39:04,564 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2019-11-23 20:39:04,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:04,565 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2019-11-23 20:39:04,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:39:04,565 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2019-11-23 20:39:04,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 20:39:04,566 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:04,566 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:04,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:04,770 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:04,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:04,771 INFO L82 PathProgramCache]: Analyzing trace with hash 923115154, now seen corresponding path program 2 times [2019-11-23 20:39:04,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:04,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938813877] [2019-11-23 20:39:04,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:04,776 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:04,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055754338] [2019-11-23 20:39:04,777 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:04,827 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:39:04,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:04,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:39:04,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:39:04,883 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938813877] [2019-11-23 20:39:04,883 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:04,884 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055754338] [2019-11-23 20:39:04,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:39:04,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 20:39:04,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724153934] [2019-11-23 20:39:04,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:39:04,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:04,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:39:04,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:39:04,886 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2019-11-23 20:39:04,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:04,971 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2019-11-23 20:39:04,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:39:04,972 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2019-11-23 20:39:04,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:04,972 INFO L225 Difference]: With dead ends: 77 [2019-11-23 20:39:04,973 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 20:39:04,973 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:39:04,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 20:39:04,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2019-11-23 20:39:04,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 20:39:04,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-11-23 20:39:04,981 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 22 [2019-11-23 20:39:04,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:04,982 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-11-23 20:39:04,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:39:04,982 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-11-23 20:39:04,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:39:04,983 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:04,983 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:05,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:05,184 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:05,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:05,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1541106392, now seen corresponding path program 3 times [2019-11-23 20:39:05,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:05,186 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038074411] [2019-11-23 20:39:05,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:05,191 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:05,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202611779] [2019-11-23 20:39:05,192 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:05,227 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:39:05,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:05,228 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:39:05,230 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:39:05,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038074411] [2019-11-23 20:39:05,273 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:05,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202611779] [2019-11-23 20:39:05,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:39:05,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:39:05,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272018531] [2019-11-23 20:39:05,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:39:05,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:05,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:39:05,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:39:05,275 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 5 states. [2019-11-23 20:39:05,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:05,376 INFO L93 Difference]: Finished difference Result 124 states and 152 transitions. [2019-11-23 20:39:05,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:39:05,377 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-11-23 20:39:05,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:05,381 INFO L225 Difference]: With dead ends: 124 [2019-11-23 20:39:05,381 INFO L226 Difference]: Without dead ends: 97 [2019-11-23 20:39:05,383 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:39:05,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-23 20:39:05,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 51. [2019-11-23 20:39:05,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-23 20:39:05,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2019-11-23 20:39:05,411 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 24 [2019-11-23 20:39:05,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:05,412 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2019-11-23 20:39:05,412 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:39:05,412 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2019-11-23 20:39:05,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 20:39:05,413 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:05,413 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:05,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:05,619 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:05,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:05,619 INFO L82 PathProgramCache]: Analyzing trace with hash -57445772, now seen corresponding path program 4 times [2019-11-23 20:39:05,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:05,620 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179973308] [2019-11-23 20:39:05,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:05,636 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:05,636 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859265801] [2019-11-23 20:39:05,636 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:37,052 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:39:37,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:37,068 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:39:37,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-11-23 20:39:37,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179973308] [2019-11-23 20:39:37,162 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:37,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859265801] [2019-11-23 20:39:37,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:39:37,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 20:39:37,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166026277] [2019-11-23 20:39:37,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:39:37,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:37,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:39:37,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:39:37,164 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 8 states. [2019-11-23 20:39:37,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:37,263 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2019-11-23 20:39:37,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:39:37,264 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2019-11-23 20:39:37,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:37,265 INFO L225 Difference]: With dead ends: 114 [2019-11-23 20:39:37,265 INFO L226 Difference]: Without dead ends: 71 [2019-11-23 20:39:37,265 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:39:37,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-23 20:39:37,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2019-11-23 20:39:37,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:39:37,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2019-11-23 20:39:37,275 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 38 [2019-11-23 20:39:37,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:37,276 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2019-11-23 20:39:37,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:39:37,276 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2019-11-23 20:39:37,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 20:39:37,277 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:37,277 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:37,478 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:37,479 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:37,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:37,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1601697520, now seen corresponding path program 5 times [2019-11-23 20:39:37,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:37,480 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254806300] [2019-11-23 20:39:37,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:37,485 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:37,486 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965586905] [2019-11-23 20:39:37,486 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 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