/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/copy-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:40:20,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:40:20,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:40:20,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:40:20,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:40:20,397 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:40:20,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:40:20,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:40:20,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:40:20,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:40:20,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:40:20,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:40:20,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:40:20,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:40:20,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:40:20,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:40:20,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:40:20,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:40:20,430 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:40:20,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:40:20,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:40:20,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:40:20,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:40:20,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:40:20,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:40:20,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:40:20,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:40:20,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:40:20,459 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 20:40:20,477 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:40:20,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:40:20,479 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:40:20,479 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:40:20,479 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:40:20,479 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:40:20,480 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:40:20,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:40:20,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:40:20,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:40:20,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:40:20,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:40:20,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:40:20,482 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:40:20,482 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:40:20,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:40:20,483 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:40:20,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:40:20,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:40:20,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:40:20,483 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:40:20,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:40:20,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:40:20,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:40:20,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:40:20,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:40:20,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:40:20,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:40:20,485 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:40:20,485 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:40:20,734 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:40:20,746 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:40:20,749 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:40:20,750 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:40:20,751 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:40:20,751 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/copy-3-n-u.c [2019-11-23 20:40:20,809 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3acc4af55/42d6dad597ad4dab947176f61aee8fce/FLAGafcfed36d [2019-11-23 20:40:21,239 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:40:21,240 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/copy-3-n-u.c [2019-11-23 20:40:21,246 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3acc4af55/42d6dad597ad4dab947176f61aee8fce/FLAGafcfed36d [2019-11-23 20:40:21,574 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3acc4af55/42d6dad597ad4dab947176f61aee8fce [2019-11-23 20:40:21,581 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:40:21,583 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:40:21,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:40:21,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:40:21,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:40:21,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:40:21" (1/1) ... [2019-11-23 20:40:21,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b1356f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:21, skipping insertion in model container [2019-11-23 20:40:21,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:40:21" (1/1) ... [2019-11-23 20:40:21,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:40:21,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:40:21,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:40:21,861 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:40:21,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:40:21,999 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:40:22,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22 WrapperNode [2019-11-23 20:40:22,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:40:22,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:40:22,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:40:22,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:40:22,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22" (1/1) ... [2019-11-23 20:40:22,016 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22" (1/1) ... [2019-11-23 20:40:22,041 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:40:22,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:40:22,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:40:22,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:40:22,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22" (1/1) ... [2019-11-23 20:40:22,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22" (1/1) ... [2019-11-23 20:40:22,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22" (1/1) ... [2019-11-23 20:40:22,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22" (1/1) ... [2019-11-23 20:40:22,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22" (1/1) ... [2019-11-23 20:40:22,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22" (1/1) ... [2019-11-23 20:40:22,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22" (1/1) ... [2019-11-23 20:40:22,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:40:22,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:40:22,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:40:22,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:40:22,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22" (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 20:40:22,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:40:22,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:40:22,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:40:22,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:40:22,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:40:22,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:40:22,489 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:40:22,489 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 20:40:22,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:40:22 BoogieIcfgContainer [2019-11-23 20:40:22,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:40:22,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:40:22,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:40:22,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:40:22,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:40:21" (1/3) ... [2019-11-23 20:40:22,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9703716 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:40:22, skipping insertion in model container [2019-11-23 20:40:22,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22" (2/3) ... [2019-11-23 20:40:22,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9703716 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:40:22, skipping insertion in model container [2019-11-23 20:40:22,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:40:22" (3/3) ... [2019-11-23 20:40:22,500 INFO L109 eAbstractionObserver]: Analyzing ICFG copy-3-n-u.c [2019-11-23 20:40:22,510 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:40:22,518 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:40:22,528 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:40:22,549 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:40:22,550 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:40:22,550 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:40:22,550 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:40:22,550 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:40:22,550 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:40:22,550 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:40:22,551 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:40:22,563 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 20:40:22,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:40:22,570 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:22,571 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:22,572 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:22,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:22,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1568356865, now seen corresponding path program 1 times [2019-11-23 20:40:22,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:22,587 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292414316] [2019-11-23 20:40:22,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:22,668 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:22,669 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1985251739] [2019-11-23 20:40:22,669 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 20:40:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:22,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-23 20:40:22,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:22,746 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 20:40:22,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292414316] [2019-11-23 20:40:22,747 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:22,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985251739] [2019-11-23 20:40:22,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:22,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:40:22,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423885306] [2019-11-23 20:40:22,754 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:40:22,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:22,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:40:22,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:40:22,771 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2019-11-23 20:40:22,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:22,792 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2019-11-23 20:40:22,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:40:22,794 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-23 20:40:22,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:22,803 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:40:22,804 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 20:40:22,807 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:40:22,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 20:40:22,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 20:40:22,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:40:22,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2019-11-23 20:40:22,840 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 11 [2019-11-23 20:40:22,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:22,841 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2019-11-23 20:40:22,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:40:22,841 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2019-11-23 20:40:22,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:40:22,842 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:22,842 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:23,043 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:23,043 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:23,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:23,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1115669473, now seen corresponding path program 1 times [2019-11-23 20:40:23,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:23,046 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354333402] [2019-11-23 20:40:23,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:23,055 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:23,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797128418] [2019-11-23 20:40:23,056 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 20:40:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:23,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:40:23,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:23,157 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 20:40:23,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354333402] [2019-11-23 20:40:23,158 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:23,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797128418] [2019-11-23 20:40:23,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:23,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:40:23,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591472273] [2019-11-23 20:40:23,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:40:23,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:23,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:40:23,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:40:23,164 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 3 states. [2019-11-23 20:40:23,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:23,222 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2019-11-23 20:40:23,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:40:23,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 20:40:23,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:23,224 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:40:23,224 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:40:23,225 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 20:40:23,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:40:23,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2019-11-23 20:40:23,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:40:23,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2019-11-23 20:40:23,233 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 11 [2019-11-23 20:40:23,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:23,234 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2019-11-23 20:40:23,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:40:23,234 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2019-11-23 20:40:23,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:40:23,235 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:23,235 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:23,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:23,443 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:23,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:23,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1536116311, now seen corresponding path program 1 times [2019-11-23 20:40:23,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:23,445 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291774373] [2019-11-23 20:40:23,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:23,450 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:23,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1140785624] [2019-11-23 20:40:23,451 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 20:40:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:23,489 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:40:23,490 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:23,516 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 20:40:23,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291774373] [2019-11-23 20:40:23,517 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:23,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140785624] [2019-11-23 20:40:23,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:23,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:40:23,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170584730] [2019-11-23 20:40:23,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:40:23,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:23,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:40:23,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:40:23,519 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 4 states. [2019-11-23 20:40:23,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:23,613 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2019-11-23 20:40:23,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:40:23,613 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-23 20:40:23,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:23,614 INFO L225 Difference]: With dead ends: 61 [2019-11-23 20:40:23,615 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:40:23,615 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 20:40:23,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:40:23,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2019-11-23 20:40:23,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:40:23,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2019-11-23 20:40:23,623 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 14 [2019-11-23 20:40:23,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:23,623 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2019-11-23 20:40:23,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:40:23,624 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2019-11-23 20:40:23,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:40:23,624 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:23,625 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:23,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:23,833 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:23,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:23,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1209800511, now seen corresponding path program 1 times [2019-11-23 20:40:23,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:23,835 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827763968] [2019-11-23 20:40:23,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:23,840 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:23,840 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707798229] [2019-11-23 20:40:23,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:23,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:40:23,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:40:23,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827763968] [2019-11-23 20:40:23,908 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:23,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707798229] [2019-11-23 20:40:23,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:23,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:40:23,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662376730] [2019-11-23 20:40:23,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:40:23,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:23,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:40:23,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:40:23,911 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 4 states. [2019-11-23 20:40:23,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:23,991 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2019-11-23 20:40:23,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:40:23,992 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-23 20:40:23,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:23,992 INFO L225 Difference]: With dead ends: 61 [2019-11-23 20:40:23,993 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 20:40:23,993 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 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 20:40:23,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 20:40:24,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2019-11-23 20:40:24,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:40:24,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2019-11-23 20:40:24,001 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2019-11-23 20:40:24,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:24,001 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2019-11-23 20:40:24,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:40:24,002 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2019-11-23 20:40:24,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:40:24,002 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:24,002 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:24,203 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:24,204 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:24,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:24,205 INFO L82 PathProgramCache]: Analyzing trace with hash -97783142, now seen corresponding path program 1 times [2019-11-23 20:40:24,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:24,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792908021] [2019-11-23 20:40:24,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:24,211 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:24,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62631691] [2019-11-23 20:40:24,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:24,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:24,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:40:24,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:40:24,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792908021] [2019-11-23 20:40:24,288 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:24,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62631691] [2019-11-23 20:40:24,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:24,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:40:24,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641905677] [2019-11-23 20:40:24,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:40:24,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:24,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:40:24,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:40:24,291 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 5 states. [2019-11-23 20:40:24,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:24,399 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2019-11-23 20:40:24,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:40:24,399 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-11-23 20:40:24,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:24,400 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:40:24,400 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 20:40:24,401 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 20:40:24,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 20:40:24,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2019-11-23 20:40:24,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 20:40:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2019-11-23 20:40:24,409 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2019-11-23 20:40:24,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:24,409 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2019-11-23 20:40:24,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:40:24,409 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2019-11-23 20:40:24,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:40:24,410 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:24,410 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:24,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:24,614 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:24,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:24,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1978170721, now seen corresponding path program 2 times [2019-11-23 20:40:24,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:24,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784303883] [2019-11-23 20:40:24,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:24,622 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:24,622 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683583991] [2019-11-23 20:40:24,622 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:24,668 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:40:24,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:24,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:40:24,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:40:24,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784303883] [2019-11-23 20:40:24,708 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:24,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683583991] [2019-11-23 20:40:24,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:24,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:40:24,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331009060] [2019-11-23 20:40:24,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:40:24,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:24,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:40:24,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:40:24,710 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 4 states. [2019-11-23 20:40:24,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:24,763 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2019-11-23 20:40:24,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:40:24,763 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-23 20:40:24,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:24,764 INFO L225 Difference]: With dead ends: 79 [2019-11-23 20:40:24,765 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:40:24,765 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 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 20:40:24,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:40:24,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 36. [2019-11-23 20:40:24,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:40:24,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2019-11-23 20:40:24,774 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 19 [2019-11-23 20:40:24,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:24,774 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2019-11-23 20:40:24,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:40:24,775 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2019-11-23 20:40:24,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:40:24,775 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:24,775 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:24,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:24,982 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:24,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:24,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1749813085, now seen corresponding path program 1 times [2019-11-23 20:40:24,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:24,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035987430] [2019-11-23 20:40:24,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:24,988 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:24,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [424424417] [2019-11-23 20:40:24,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:40:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:25,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:40:25,030 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:40:25,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035987430] [2019-11-23 20:40:25,088 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:25,088 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424424417] [2019-11-23 20:40:25,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:25,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 20:40:25,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081416998] [2019-11-23 20:40:25,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:40:25,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:25,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:40:25,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:40:25,090 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 6 states. [2019-11-23 20:40:25,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:25,180 INFO L93 Difference]: Finished difference Result 83 states and 103 transitions. [2019-11-23 20:40:25,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:40:25,180 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-11-23 20:40:25,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:25,181 INFO L225 Difference]: With dead ends: 83 [2019-11-23 20:40:25,181 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:40:25,182 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 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 20:40:25,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:40:25,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2019-11-23 20:40:25,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 20:40:25,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2019-11-23 20:40:25,190 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 27 [2019-11-23 20:40:25,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:25,191 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2019-11-23 20:40:25,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:40:25,191 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2019-11-23 20:40:25,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:40:25,192 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:25,192 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:25,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:25,404 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:25,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:25,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1516282694, now seen corresponding path program 2 times [2019-11-23 20:40:25,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:25,404 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99722987] [2019-11-23 20:40:25,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:25,411 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:25,411 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479412230] [2019-11-23 20:40:25,411 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 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 20:40:25,456 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:40:25,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:25,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:40:25,459 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:40:25,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99722987] [2019-11-23 20:40:25,514 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:25,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479412230] [2019-11-23 20:40:25,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:25,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 20:40:25,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652741577] [2019-11-23 20:40:25,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:40:25,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:25,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:40:25,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:40:25,521 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 7 states. [2019-11-23 20:40:25,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:25,626 INFO L93 Difference]: Finished difference Result 95 states and 116 transitions. [2019-11-23 20:40:25,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:40:25,627 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 20:40:25,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:25,628 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:40:25,628 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 20:40:25,629 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 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 20:40:25,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 20:40:25,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2019-11-23 20:40:25,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:40:25,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2019-11-23 20:40:25,644 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 29 [2019-11-23 20:40:25,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:25,644 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2019-11-23 20:40:25,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:40:25,645 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2019-11-23 20:40:25,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:40:25,650 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:25,650 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:25,853 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:25,854 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:25,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:25,855 INFO L82 PathProgramCache]: Analyzing trace with hash 53106109, now seen corresponding path program 3 times [2019-11-23 20:40:25,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:25,856 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839359399] [2019-11-23 20:40:25,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:25,861 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:25,862 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427463076] [2019-11-23 20:40:25,862 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 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 20:40:25,913 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:40:25,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:25,914 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:40:25,916 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-23 20:40:25,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839359399] [2019-11-23 20:40:25,961 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:25,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427463076] [2019-11-23 20:40:25,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:25,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:40:25,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605106064] [2019-11-23 20:40:25,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:40:25,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:25,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:40:25,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:40:25,963 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 5 states. [2019-11-23 20:40:26,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:26,031 INFO L93 Difference]: Finished difference Result 157 states and 196 transitions. [2019-11-23 20:40:26,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:40:26,031 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2019-11-23 20:40:26,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:26,034 INFO L225 Difference]: With dead ends: 157 [2019-11-23 20:40:26,034 INFO L226 Difference]: Without dead ends: 124 [2019-11-23 20:40:26,037 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 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 20:40:26,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-11-23 20:40:26,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 66. [2019-11-23 20:40:26,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:40:26,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2019-11-23 20:40:26,060 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 31 [2019-11-23 20:40:26,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:26,061 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2019-11-23 20:40:26,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:40:26,061 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2019-11-23 20:40:26,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:40:26,062 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:26,062 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:26,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:26,274 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:26,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:26,274 INFO L82 PathProgramCache]: Analyzing trace with hash -893728359, now seen corresponding path program 4 times [2019-11-23 20:40:26,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:26,275 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219803338] [2019-11-23 20:40:26,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:26,281 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:26,281 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331733380] [2019-11-23 20:40:26,282 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 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 20:40:26,371 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:40:26,371 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:26,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:40:26,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-23 20:40:26,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219803338] [2019-11-23 20:40:26,408 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:26,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331733380] [2019-11-23 20:40:26,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:26,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:40:26,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771171981] [2019-11-23 20:40:26,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:40:26,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:26,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:40:26,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:40:26,409 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand 5 states. [2019-11-23 20:40:26,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:26,486 INFO L93 Difference]: Finished difference Result 207 states and 256 transitions. [2019-11-23 20:40:26,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:40:26,486 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2019-11-23 20:40:26,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:26,488 INFO L225 Difference]: With dead ends: 207 [2019-11-23 20:40:26,488 INFO L226 Difference]: Without dead ends: 152 [2019-11-23 20:40:26,488 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 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 20:40:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-11-23 20:40:26,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 109. [2019-11-23 20:40:26,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-23 20:40:26,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2019-11-23 20:40:26,507 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 51 [2019-11-23 20:40:26,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:26,507 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2019-11-23 20:40:26,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:40:26,507 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2019-11-23 20:40:26,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:40:26,509 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:26,509 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:26,712 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:26,712 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:26,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:26,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1234417409, now seen corresponding path program 5 times [2019-11-23 20:40:26,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:26,713 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794721092] [2019-11-23 20:40:26,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:26,721 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:26,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276756054] [2019-11-23 20:40:26,721 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 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