/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/init-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:40:57,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:40:57,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:40:57,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:40:57,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:40:57,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:40:57,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:40:57,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:40:57,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:40:57,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:40:57,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:40:57,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:40:57,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:40:57,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:40:57,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:40:57,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:40:57,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:40:57,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:40:57,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:40:57,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:40:57,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:40:57,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:40:57,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:40:57,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:40:57,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:40:57,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:40:57,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:40:57,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:40:57,367 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 20:40:57,388 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:40:57,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:40:57,389 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:40:57,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:40:57,390 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:40:57,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:40:57,390 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:40:57,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:40:57,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:40:57,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:40:57,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:40:57,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:40:57,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:40:57,393 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:40:57,394 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:40:57,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:40:57,394 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:40:57,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:40:57,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:40:57,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:40:57,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:40:57,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:40:57,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:40:57,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:40:57,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:40:57,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:40:57,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:40:57,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:40:57,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:40:57,397 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:40:57,667 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:40:57,677 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:40:57,681 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:40:57,682 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:40:57,683 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:40:57,684 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-2-n-u.c [2019-11-23 20:40:57,756 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf2db144e/fe10b98dd7084cd6916ea517edb250b6/FLAG1645e17de [2019-11-23 20:40:58,191 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:40:58,191 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-2-n-u.c [2019-11-23 20:40:58,198 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf2db144e/fe10b98dd7084cd6916ea517edb250b6/FLAG1645e17de [2019-11-23 20:40:58,595 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf2db144e/fe10b98dd7084cd6916ea517edb250b6 [2019-11-23 20:40:58,605 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:40:58,607 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:40:58,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:40:58,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:40:58,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:40:58,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:40:58" (1/1) ... [2019-11-23 20:40:58,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ee337c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:58, skipping insertion in model container [2019-11-23 20:40:58,616 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:40:58" (1/1) ... [2019-11-23 20:40:58,623 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:40:58,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:40:58,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:40:58,912 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:40:58,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:40:58,969 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:40:58,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:58 WrapperNode [2019-11-23 20:40:58,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:40:58,972 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:40:58,972 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:40:58,972 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:40:58,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:58" (1/1) ... [2019-11-23 20:40:59,073 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:58" (1/1) ... [2019-11-23 20:40:59,100 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:40:59,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:40:59,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:40:59,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:40:59,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:58" (1/1) ... [2019-11-23 20:40:59,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:58" (1/1) ... [2019-11-23 20:40:59,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:58" (1/1) ... [2019-11-23 20:40:59,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:58" (1/1) ... [2019-11-23 20:40:59,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:58" (1/1) ... [2019-11-23 20:40:59,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:58" (1/1) ... [2019-11-23 20:40:59,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:58" (1/1) ... [2019-11-23 20:40:59,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:40:59,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:40:59,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:40:59,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:40:59,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:58" (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 20:40:59,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:40:59,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:40:59,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:40:59,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:40:59,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:40:59,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:40:59,441 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:40:59,442 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-23 20:40:59,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:40:59 BoogieIcfgContainer [2019-11-23 20:40:59,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:40:59,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:40:59,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:40:59,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:40:59,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:40:58" (1/3) ... [2019-11-23 20:40:59,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbc211d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:40:59, skipping insertion in model container [2019-11-23 20:40:59,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:58" (2/3) ... [2019-11-23 20:40:59,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbc211d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:40:59, skipping insertion in model container [2019-11-23 20:40:59,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:40:59" (3/3) ... [2019-11-23 20:40:59,461 INFO L109 eAbstractionObserver]: Analyzing ICFG init-2-n-u.c [2019-11-23 20:40:59,471 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:40:59,478 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:40:59,502 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:40:59,523 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:40:59,523 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:40:59,523 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:40:59,523 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:40:59,523 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:40:59,523 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:40:59,524 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:40:59,524 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:40:59,535 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-23 20:40:59,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 20:40:59,541 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:59,542 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:59,543 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:59,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:59,547 INFO L82 PathProgramCache]: Analyzing trace with hash 252221889, now seen corresponding path program 1 times [2019-11-23 20:40:59,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:59,555 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625933493] [2019-11-23 20:40:59,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:59,637 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:59,639 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747322759] [2019-11-23 20:40:59,640 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 20:40:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:59,730 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:40:59,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:59,782 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 20:40:59,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625933493] [2019-11-23 20:40:59,783 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:59,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747322759] [2019-11-23 20:40:59,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:59,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:40:59,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259650339] [2019-11-23 20:40:59,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:40:59,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:59,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:40:59,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:40:59,800 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-11-23 20:40:59,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:59,862 INFO L93 Difference]: Finished difference Result 35 states and 55 transitions. [2019-11-23 20:40:59,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:40:59,864 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 20:40:59,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:59,874 INFO L225 Difference]: With dead ends: 35 [2019-11-23 20:40:59,874 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 20:40:59,877 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 20:40:59,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 20:40:59,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2019-11-23 20:40:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 20:40:59,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2019-11-23 20:40:59,907 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2019-11-23 20:40:59,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:59,907 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2019-11-23 20:40:59,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:40:59,908 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2019-11-23 20:40:59,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:40:59,908 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:59,908 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:00,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:00,112 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:00,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:00,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1550338388, now seen corresponding path program 1 times [2019-11-23 20:41:00,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:00,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509465172] [2019-11-23 20:41:00,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:00,120 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:00,120 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601626724] [2019-11-23 20:41:00,121 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 20:41:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:41:00,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:41:00,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:00,187 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 20:41:00,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509465172] [2019-11-23 20:41:00,188 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:00,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601626724] [2019-11-23 20:41:00,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:41:00,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:41:00,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643580913] [2019-11-23 20:41:00,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:41:00,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:00,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:41:00,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:41:00,193 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 4 states. [2019-11-23 20:41:00,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:00,242 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-11-23 20:41:00,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:41:00,243 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-23 20:41:00,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:00,243 INFO L225 Difference]: With dead ends: 32 [2019-11-23 20:41:00,244 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 20:41:00,245 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 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 20:41:00,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 20:41:00,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2019-11-23 20:41:00,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:41:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2019-11-23 20:41:00,251 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2019-11-23 20:41:00,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:00,251 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2019-11-23 20:41:00,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:41:00,252 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2019-11-23 20:41:00,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:41:00,252 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:00,253 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:00,456 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:00,456 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:00,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:00,457 INFO L82 PathProgramCache]: Analyzing trace with hash -2127602064, now seen corresponding path program 1 times [2019-11-23 20:41:00,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:00,458 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775236230] [2019-11-23 20:41:00,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:00,463 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:00,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799340314] [2019-11-23 20:41:00,464 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 20:41:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:41:00,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:41:00,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:00,563 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 20:41:00,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775236230] [2019-11-23 20:41:00,564 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:00,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799340314] [2019-11-23 20:41:00,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:00,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:41:00,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655812130] [2019-11-23 20:41:00,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:41:00,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:00,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:41:00,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:41:00,566 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 5 states. [2019-11-23 20:41:00,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:00,630 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2019-11-23 20:41:00,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:41:00,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-23 20:41:00,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:00,633 INFO L225 Difference]: With dead ends: 40 [2019-11-23 20:41:00,633 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 20:41:00,634 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 20:41:00,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 20:41:00,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2019-11-23 20:41:00,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:41:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-23 20:41:00,645 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2019-11-23 20:41:00,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:00,646 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-23 20:41:00,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:41:00,647 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-23 20:41:00,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:41:00,647 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:00,647 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:00,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:00,848 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:00,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:00,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1452060460, now seen corresponding path program 2 times [2019-11-23 20:41:00,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:00,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913377233] [2019-11-23 20:41:00,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:00,856 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:00,856 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348380980] [2019-11-23 20:41:00,857 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 20:41:00,894 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:41:00,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:00,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:41:00,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:41:00,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913377233] [2019-11-23 20:41:00,941 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:00,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348380980] [2019-11-23 20:41:00,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:00,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 20:41:00,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136016680] [2019-11-23 20:41:00,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:41:00,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:00,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:41:00,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:41:00,943 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 6 states. [2019-11-23 20:41:00,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:00,995 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2019-11-23 20:41:00,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:41:00,996 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-23 20:41:00,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:00,997 INFO L225 Difference]: With dead ends: 50 [2019-11-23 20:41:00,997 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 20:41:00,998 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 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 20:41:00,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 20:41:01,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2019-11-23 20:41:01,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:41:01,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2019-11-23 20:41:01,005 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 13 [2019-11-23 20:41:01,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:01,006 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2019-11-23 20:41:01,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:41:01,006 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2019-11-23 20:41:01,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:41:01,007 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:01,007 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:01,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:01,223 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:01,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:01,224 INFO L82 PathProgramCache]: Analyzing trace with hash 752449008, now seen corresponding path program 3 times [2019-11-23 20:41:01,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:01,225 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763689798] [2019-11-23 20:41:01,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:01,231 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:01,231 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327461404] [2019-11-23 20:41:01,231 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:01,259 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:41:01,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:01,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:41:01,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:41:01,283 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763689798] [2019-11-23 20:41:01,283 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:01,283 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327461404] [2019-11-23 20:41:01,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:01,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-23 20:41:01,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280133028] [2019-11-23 20:41:01,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:41:01,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:01,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:41:01,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:41:01,285 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 4 states. [2019-11-23 20:41:01,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:01,320 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2019-11-23 20:41:01,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:41:01,321 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-23 20:41:01,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:01,321 INFO L225 Difference]: With dead ends: 50 [2019-11-23 20:41:01,322 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 20:41:01,322 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 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 20:41:01,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 20:41:01,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2019-11-23 20:41:01,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:41:01,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2019-11-23 20:41:01,329 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2019-11-23 20:41:01,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:01,330 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2019-11-23 20:41:01,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:41:01,330 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2019-11-23 20:41:01,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:41:01,331 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:01,331 INFO L410 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:01,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:01,534 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:01,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:01,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1071264479, now seen corresponding path program 4 times [2019-11-23 20:41:01,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:01,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792105823] [2019-11-23 20:41:01,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:01,541 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:01,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036815719] [2019-11-23 20:41:01,541 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:01,597 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:41:01,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:01,599 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:41:01,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:41:01,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792105823] [2019-11-23 20:41:01,648 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:01,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036815719] [2019-11-23 20:41:01,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:01,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 20:41:01,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459969220] [2019-11-23 20:41:01,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:41:01,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:01,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:41:01,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:41:01,650 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 7 states. [2019-11-23 20:41:01,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:01,706 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2019-11-23 20:41:01,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:41:01,706 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-11-23 20:41:01,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:01,707 INFO L225 Difference]: With dead ends: 69 [2019-11-23 20:41:01,707 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:41:01,708 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 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 20:41:01,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:41:01,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2019-11-23 20:41:01,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 20:41:01,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2019-11-23 20:41:01,716 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 20 [2019-11-23 20:41:01,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:01,716 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2019-11-23 20:41:01,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:41:01,716 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2019-11-23 20:41:01,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 20:41:01,717 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:01,717 INFO L410 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:01,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:01,921 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:01,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:01,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1446499487, now seen corresponding path program 5 times [2019-11-23 20:41:01,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:01,922 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479684314] [2019-11-23 20:41:01,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:01,927 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:01,927 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303107150] [2019-11-23 20:41:01,928 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:01,986 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-23 20:41:01,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:01,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:41:01,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:02,049 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:41:02,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479684314] [2019-11-23 20:41:02,050 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:02,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303107150] [2019-11-23 20:41:02,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:02,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 20:41:02,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027968821] [2019-11-23 20:41:02,051 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:41:02,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:02,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:41:02,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:41:02,052 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 8 states. [2019-11-23 20:41:02,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:02,133 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2019-11-23 20:41:02,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:41:02,133 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-11-23 20:41:02,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:02,134 INFO L225 Difference]: With dead ends: 80 [2019-11-23 20:41:02,134 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 20:41:02,137 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 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 20:41:02,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 20:41:02,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 40. [2019-11-23 20:41:02,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:41:02,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2019-11-23 20:41:02,151 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 22 [2019-11-23 20:41:02,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:02,151 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2019-11-23 20:41:02,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:41:02,151 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2019-11-23 20:41:02,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:41:02,155 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:02,155 INFO L410 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:02,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:02,359 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:02,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:02,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1984716257, now seen corresponding path program 6 times [2019-11-23 20:41:02,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:02,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591371396] [2019-11-23 20:41:02,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:02,364 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:02,364 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7651273] [2019-11-23 20:41:02,364 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:02,409 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-11-23 20:41:02,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:02,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:41:02,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-23 20:41:02,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591371396] [2019-11-23 20:41:02,463 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:02,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7651273] [2019-11-23 20:41:02,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:02,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:41:02,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425429035] [2019-11-23 20:41:02,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:41:02,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:02,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:41:02,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:41:02,465 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 5 states. [2019-11-23 20:41:02,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:02,500 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2019-11-23 20:41:02,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:41:02,502 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-11-23 20:41:02,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:02,504 INFO L225 Difference]: With dead ends: 76 [2019-11-23 20:41:02,504 INFO L226 Difference]: Without dead ends: 55 [2019-11-23 20:41:02,506 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 20:41:02,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-23 20:41:02,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2019-11-23 20:41:02,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:41:02,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2019-11-23 20:41:02,521 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 24 [2019-11-23 20:41:02,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:02,521 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2019-11-23 20:41:02,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:41:02,521 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2019-11-23 20:41:02,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 20:41:02,523 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:02,523 INFO L410 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:02,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:02,730 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:02,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:02,730 INFO L82 PathProgramCache]: Analyzing trace with hash -895518770, now seen corresponding path program 7 times [2019-11-23 20:41:02,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:02,731 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54870684] [2019-11-23 20:41:02,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:02,740 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:02,740 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278553234] [2019-11-23 20:41:02,740 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:41:02,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:41:02,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:02,862 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 75 proven. 15 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 20:41:02,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54870684] [2019-11-23 20:41:02,862 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:02,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278553234] [2019-11-23 20:41:02,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:02,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 20:41:02,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337124403] [2019-11-23 20:41:02,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:41:02,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:02,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:41:02,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:41:02,865 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 9 states. [2019-11-23 20:41:02,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:02,942 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2019-11-23 20:41:02,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:41:02,943 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2019-11-23 20:41:02,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:02,944 INFO L225 Difference]: With dead ends: 108 [2019-11-23 20:41:02,944 INFO L226 Difference]: Without dead ends: 69 [2019-11-23 20:41:02,945 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:41:02,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-23 20:41:02,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 54. [2019-11-23 20:41:02,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:41:02,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2019-11-23 20:41:02,955 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 32 [2019-11-23 20:41:02,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:02,955 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2019-11-23 20:41:02,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:41:02,956 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2019-11-23 20:41:02,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:41:02,957 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:02,957 INFO L410 BasicCegarLoop]: trace histogram [18, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:03,164 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:03,165 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:03,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:03,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1989106740, now seen corresponding path program 8 times [2019-11-23 20:41:03,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:03,165 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315901478] [2019-11-23 20:41:03,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:03,170 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:03,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267810332] [2019-11-23 20:41:03,171 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:03,225 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:41:03,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:03,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:41:03,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:03,317 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 101 proven. 21 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-11-23 20:41:03,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315901478] [2019-11-23 20:41:03,318 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:03,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267810332] [2019-11-23 20:41:03,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:03,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 20:41:03,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139524057] [2019-11-23 20:41:03,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:41:03,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:03,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:41:03,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:41:03,320 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 10 states. [2019-11-23 20:41:03,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:03,389 INFO L93 Difference]: Finished difference Result 121 states and 139 transitions. [2019-11-23 20:41:03,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:41:03,390 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2019-11-23 20:41:03,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:03,391 INFO L225 Difference]: With dead ends: 121 [2019-11-23 20:41:03,391 INFO L226 Difference]: Without dead ends: 77 [2019-11-23 20:41:03,392 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:41:03,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-23 20:41:03,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2019-11-23 20:41:03,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 20:41:03,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2019-11-23 20:41:03,401 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 35 [2019-11-23 20:41:03,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:03,401 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2019-11-23 20:41:03,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:41:03,401 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2019-11-23 20:41:03,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 20:41:03,402 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:03,402 INFO L410 BasicCegarLoop]: trace histogram [21, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:03,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:03,605 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:03,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:03,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1759674610, now seen corresponding path program 9 times [2019-11-23 20:41:03,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:03,607 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933797726] [2019-11-23 20:41:03,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:03,611 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:03,612 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595830411] [2019-11-23 20:41:03,612 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:03,829 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 20:41:03,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:03,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:41:03,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 133 proven. 28 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2019-11-23 20:41:03,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933797726] [2019-11-23 20:41:03,941 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:03,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595830411] [2019-11-23 20:41:03,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:03,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 20:41:03,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753247509] [2019-11-23 20:41:03,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:41:03,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:03,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:41:03,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:41:03,943 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 11 states. [2019-11-23 20:41:04,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:04,017 INFO L93 Difference]: Finished difference Result 134 states and 153 transitions. [2019-11-23 20:41:04,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:41:04,017 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2019-11-23 20:41:04,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:04,018 INFO L225 Difference]: With dead ends: 134 [2019-11-23 20:41:04,018 INFO L226 Difference]: Without dead ends: 85 [2019-11-23 20:41:04,019 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:41:04,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-23 20:41:04,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 66. [2019-11-23 20:41:04,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:41:04,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2019-11-23 20:41:04,028 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 38 [2019-11-23 20:41:04,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:04,028 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2019-11-23 20:41:04,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:41:04,029 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2019-11-23 20:41:04,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:41:04,029 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:04,029 INFO L410 BasicCegarLoop]: trace histogram [24, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:04,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:04,240 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:04,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:04,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1214780812, now seen corresponding path program 10 times [2019-11-23 20:41:04,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:04,242 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426012966] [2019-11-23 20:41:04,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:04,248 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:04,248 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130088742] [2019-11-23 20:41:04,248 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:10,357 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:41:10,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:10,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:41:10,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:10,469 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 165 proven. 36 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2019-11-23 20:41:10,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426012966] [2019-11-23 20:41:10,469 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:10,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130088742] [2019-11-23 20:41:10,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:10,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-23 20:41:10,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238005432] [2019-11-23 20:41:10,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:41:10,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:10,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:41:10,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:41:10,471 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 12 states. [2019-11-23 20:41:10,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:10,552 INFO L93 Difference]: Finished difference Result 147 states and 167 transitions. [2019-11-23 20:41:10,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:41:10,552 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2019-11-23 20:41:10,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:10,553 INFO L225 Difference]: With dead ends: 147 [2019-11-23 20:41:10,553 INFO L226 Difference]: Without dead ends: 93 [2019-11-23 20:41:10,554 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:41:10,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-23 20:41:10,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 72. [2019-11-23 20:41:10,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:41:10,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2019-11-23 20:41:10,563 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 41 [2019-11-23 20:41:10,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:10,563 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2019-11-23 20:41:10,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:41:10,563 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2019-11-23 20:41:10,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 20:41:10,564 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:10,564 INFO L410 BasicCegarLoop]: trace histogram [27, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:10,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:10,765 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:10,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:10,766 INFO L82 PathProgramCache]: Analyzing trace with hash 320165454, now seen corresponding path program 11 times [2019-11-23 20:41:10,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:10,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042818877] [2019-11-23 20:41:10,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:10,771 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:10,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96363204] [2019-11-23 20:41:10,771 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:12,679 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:41:12,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:12,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:41:12,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 306 proven. 45 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-11-23 20:41:12,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042818877] [2019-11-23 20:41:12,833 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:12,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96363204] [2019-11-23 20:41:12,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:12,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-23 20:41:12,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275269527] [2019-11-23 20:41:12,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:41:12,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:12,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:41:12,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:41:12,835 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 13 states. [2019-11-23 20:41:12,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:12,914 INFO L93 Difference]: Finished difference Result 160 states and 181 transitions. [2019-11-23 20:41:12,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:41:12,915 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2019-11-23 20:41:12,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:12,916 INFO L225 Difference]: With dead ends: 160 [2019-11-23 20:41:12,917 INFO L226 Difference]: Without dead ends: 101 [2019-11-23 20:41:12,918 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:41:12,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-23 20:41:12,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2019-11-23 20:41:12,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 20:41:12,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2019-11-23 20:41:12,928 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 44 [2019-11-23 20:41:12,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:12,928 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2019-11-23 20:41:12,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:41:12,928 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2019-11-23 20:41:12,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:41:12,929 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:12,929 INFO L410 BasicCegarLoop]: trace histogram [30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:13,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:13,136 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:13,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:13,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1475922100, now seen corresponding path program 12 times [2019-11-23 20:41:13,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:13,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769542993] [2019-11-23 20:41:13,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:13,142 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:13,142 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323865296] [2019-11-23 20:41:13,142 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:13,256 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2019-11-23 20:41:13,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:13,258 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:41:13,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 369 proven. 55 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-11-23 20:41:13,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769542993] [2019-11-23 20:41:13,414 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:13,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323865296] [2019-11-23 20:41:13,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:13,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-23 20:41:13,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044519438] [2019-11-23 20:41:13,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:41:13,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:13,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:41:13,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:41:13,416 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand 14 states. [2019-11-23 20:41:13,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:13,502 INFO L93 Difference]: Finished difference Result 173 states and 195 transitions. [2019-11-23 20:41:13,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:41:13,503 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2019-11-23 20:41:13,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:13,505 INFO L225 Difference]: With dead ends: 173 [2019-11-23 20:41:13,505 INFO L226 Difference]: Without dead ends: 109 [2019-11-23 20:41:13,506 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:41:13,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-23 20:41:13,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 84. [2019-11-23 20:41:13,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:41:13,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2019-11-23 20:41:13,515 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 47 [2019-11-23 20:41:13,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:13,515 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2019-11-23 20:41:13,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:41:13,515 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2019-11-23 20:41:13,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 20:41:13,516 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:13,516 INFO L410 BasicCegarLoop]: trace histogram [33, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:13,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:13,720 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:13,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:13,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1674771854, now seen corresponding path program 13 times [2019-11-23 20:41:13,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:13,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489794273] [2019-11-23 20:41:13,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:13,724 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:13,725 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [913035602] [2019-11-23 20:41:13,725 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:41:13,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:41:13,776 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 291 proven. 66 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2019-11-23 20:41:13,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489794273] [2019-11-23 20:41:13,959 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:13,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913035602] [2019-11-23 20:41:13,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:13,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-11-23 20:41:13,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022109345] [2019-11-23 20:41:13,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:41:13,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:13,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:41:13,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:41:13,962 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand 15 states. [2019-11-23 20:41:14,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:14,069 INFO L93 Difference]: Finished difference Result 186 states and 209 transitions. [2019-11-23 20:41:14,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:41:14,070 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2019-11-23 20:41:14,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:14,071 INFO L225 Difference]: With dead ends: 186 [2019-11-23 20:41:14,071 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 20:41:14,072 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:41:14,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 20:41:14,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 90. [2019-11-23 20:41:14,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-23 20:41:14,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2019-11-23 20:41:14,081 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 50 [2019-11-23 20:41:14,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:14,082 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2019-11-23 20:41:14,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:41:14,082 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2019-11-23 20:41:14,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:41:14,083 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:14,083 INFO L410 BasicCegarLoop]: trace histogram [36, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:14,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:14,287 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:14,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:14,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1522665740, now seen corresponding path program 14 times [2019-11-23 20:41:14,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:14,288 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496961493] [2019-11-23 20:41:14,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:14,292 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:14,292 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143612501] [2019-11-23 20:41:14,292 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:14,339 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:41:14,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:14,340 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:41:14,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:14,519 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 341 proven. 78 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-11-23 20:41:14,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496961493] [2019-11-23 20:41:14,520 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:14,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143612501] [2019-11-23 20:41:14,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:14,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-11-23 20:41:14,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383745241] [2019-11-23 20:41:14,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:41:14,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:14,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:41:14,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:41:14,522 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand 16 states. [2019-11-23 20:41:14,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:14,632 INFO L93 Difference]: Finished difference Result 199 states and 223 transitions. [2019-11-23 20:41:14,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:41:14,633 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2019-11-23 20:41:14,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:14,634 INFO L225 Difference]: With dead ends: 199 [2019-11-23 20:41:14,634 INFO L226 Difference]: Without dead ends: 125 [2019-11-23 20:41:14,635 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:41:14,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-11-23 20:41:14,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 96. [2019-11-23 20:41:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-23 20:41:14,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2019-11-23 20:41:14,649 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 53 [2019-11-23 20:41:14,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:14,649 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2019-11-23 20:41:14,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:41:14,649 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2019-11-23 20:41:14,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 20:41:14,653 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:14,653 INFO L410 BasicCegarLoop]: trace histogram [39, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:14,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:14,860 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:14,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:14,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1872917710, now seen corresponding path program 15 times [2019-11-23 20:41:14,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:14,861 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174702300] [2019-11-23 20:41:14,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:14,865 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:14,865 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88820007] [2019-11-23 20:41:14,866 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:16,782 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-23 20:41:16,782 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:16,786 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:41:16,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 397 proven. 91 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2019-11-23 20:41:17,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174702300] [2019-11-23 20:41:17,058 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:17,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88820007] [2019-11-23 20:41:17,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:17,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-11-23 20:41:17,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127799741] [2019-11-23 20:41:17,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:41:17,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:17,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:41:17,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:41:17,060 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand 17 states. [2019-11-23 20:41:17,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:17,165 INFO L93 Difference]: Finished difference Result 212 states and 237 transitions. [2019-11-23 20:41:17,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:41:17,165 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 56 [2019-11-23 20:41:17,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:17,166 INFO L225 Difference]: With dead ends: 212 [2019-11-23 20:41:17,166 INFO L226 Difference]: Without dead ends: 133 [2019-11-23 20:41:17,167 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:41:17,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-11-23 20:41:17,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2019-11-23 20:41:17,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-23 20:41:17,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 120 transitions. [2019-11-23 20:41:17,177 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 120 transitions. Word has length 56 [2019-11-23 20:41:17,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:17,179 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 120 transitions. [2019-11-23 20:41:17,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:41:17,179 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 120 transitions. [2019-11-23 20:41:17,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:41:17,180 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:17,181 INFO L410 BasicCegarLoop]: trace histogram [42, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:17,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:17,394 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:17,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:17,394 INFO L82 PathProgramCache]: Analyzing trace with hash -770929972, now seen corresponding path program 16 times [2019-11-23 20:41:17,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:17,395 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346063099] [2019-11-23 20:41:17,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:17,403 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:17,405 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521915820] [2019-11-23 20:41:17,405 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true