/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-multidimensional/min-2-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:50:55,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:50:55,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:50:55,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:50:55,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:50:55,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:50:55,364 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:50:55,368 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:50:55,370 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:50:55,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:50:55,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:50:55,376 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:50:55,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:50:55,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:50:55,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:50:55,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:50:55,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:50:55,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:50:55,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:50:55,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:50:55,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:50:55,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:50:55,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:50:55,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:50:55,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:50:55,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:50:55,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:50:55,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:50:55,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:50:55,410 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:50:55,410 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:50:55,410 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:50:55,411 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:50:55,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:50:55,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:50:55,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:50:55,415 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:50:55,434 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:50:55,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:50:55,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:50:55,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:50:55,436 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:50:55,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:50:55,437 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:50:55,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:50:55,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:50:55,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:50:55,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:50:55,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:50:55,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:50:55,439 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:50:55,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:50:55,440 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:50:55,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:50:55,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:50:55,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:50:55,440 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:50:55,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:50:55,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:50:55,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:50:55,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:50:55,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:50:55,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:50:55,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:50:55,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:50:55,442 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:50:55,719 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:50:55,731 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:50:55,735 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:50:55,736 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:50:55,736 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:50:55,737 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/min-2-u.c [2019-11-06 18:50:55,793 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/774a892ba/786aaaac5e0d4c8580b7e65b82b985ed/FLAGd792e80dd [2019-11-06 18:50:56,210 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:50:56,210 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/min-2-u.c [2019-11-06 18:50:56,216 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/774a892ba/786aaaac5e0d4c8580b7e65b82b985ed/FLAGd792e80dd [2019-11-06 18:50:56,607 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/774a892ba/786aaaac5e0d4c8580b7e65b82b985ed [2019-11-06 18:50:56,615 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:50:56,616 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:50:56,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:50:56,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:50:56,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:50:56,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:50:56" (1/1) ... [2019-11-06 18:50:56,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@498fa5e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:56, skipping insertion in model container [2019-11-06 18:50:56,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:50:56" (1/1) ... [2019-11-06 18:50:56,632 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:50:56,649 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:50:56,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:50:56,860 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:50:56,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:50:56,993 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:50:56,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:56 WrapperNode [2019-11-06 18:50:56,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:50:56,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:50:56,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:50:56,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:50:57,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:56" (1/1) ... [2019-11-06 18:50:57,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:56" (1/1) ... [2019-11-06 18:50:57,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:56" (1/1) ... [2019-11-06 18:50:57,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:56" (1/1) ... [2019-11-06 18:50:57,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:56" (1/1) ... [2019-11-06 18:50:57,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:56" (1/1) ... [2019-11-06 18:50:57,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:56" (1/1) ... [2019-11-06 18:50:57,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:50:57,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:50:57,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:50:57,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:50:57,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:50:57,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:50:57,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:50:57,093 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:50:57,093 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:50:57,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:50:57,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:50:57,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:50:57,094 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:50:57,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:50:57,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:50:57,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:50:57,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:50:57,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:50:57,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:50:57,371 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:50:57,372 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-06 18:50:57,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:50:57 BoogieIcfgContainer [2019-11-06 18:50:57,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:50:57,374 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:50:57,375 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:50:57,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:50:57,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:50:56" (1/3) ... [2019-11-06 18:50:57,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22160a77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:50:57, skipping insertion in model container [2019-11-06 18:50:57,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:56" (2/3) ... [2019-11-06 18:50:57,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22160a77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:50:57, skipping insertion in model container [2019-11-06 18:50:57,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:50:57" (3/3) ... [2019-11-06 18:50:57,395 INFO L109 eAbstractionObserver]: Analyzing ICFG min-2-u.c [2019-11-06 18:50:57,407 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:50:57,414 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:50:57,425 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:50:57,449 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:50:57,449 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:50:57,449 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:50:57,449 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:50:57,449 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:50:57,450 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:50:57,450 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:50:57,450 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:50:57,465 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-06 18:50:57,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:50:57,470 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:57,470 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:57,472 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:57,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:57,476 INFO L82 PathProgramCache]: Analyzing trace with hash 659715076, now seen corresponding path program 1 times [2019-11-06 18:50:57,483 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:57,483 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569869260] [2019-11-06 18:50:57,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:57,567 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:57,568 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706335237] [2019-11-06 18:50:57,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:57,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:50:57,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:57,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:57,692 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569869260] [2019-11-06 18:50:57,692 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:57,692 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706335237] [2019-11-06 18:50:57,693 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:57,693 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:50:57,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252046806] [2019-11-06 18:50:57,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:50:57,699 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:57,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:50:57,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:50:57,715 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-11-06 18:50:57,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:57,784 INFO L93 Difference]: Finished difference Result 61 states and 92 transitions. [2019-11-06 18:50:57,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:50:57,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-06 18:50:57,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:57,794 INFO L225 Difference]: With dead ends: 61 [2019-11-06 18:50:57,795 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 18:50:57,798 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:50:57,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 18:50:57,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2019-11-06 18:50:57,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:50:57,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-11-06 18:50:57,836 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2019-11-06 18:50:57,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:57,836 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-11-06 18:50:57,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:50:57,837 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-11-06 18:50:57,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 18:50:57,838 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:57,838 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:58,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:58,039 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:58,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:58,040 INFO L82 PathProgramCache]: Analyzing trace with hash -528988062, now seen corresponding path program 1 times [2019-11-06 18:50:58,041 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:58,042 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015239753] [2019-11-06 18:50:58,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:58,051 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:58,052 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526136892] [2019-11-06 18:50:58,054 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 [2019-11-06 18:50:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:58,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:50:58,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:58,135 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015239753] [2019-11-06 18:50:58,135 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:58,135 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526136892] [2019-11-06 18:50:58,136 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:58,136 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:50:58,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067630410] [2019-11-06 18:50:58,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:50:58,138 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:58,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:50:58,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:58,139 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2019-11-06 18:50:58,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:58,230 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2019-11-06 18:50:58,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:50:58,231 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-06 18:50:58,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:58,235 INFO L225 Difference]: With dead ends: 59 [2019-11-06 18:50:58,235 INFO L226 Difference]: Without dead ends: 38 [2019-11-06 18:50:58,236 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 [2019-11-06 18:50:58,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-06 18:50:58,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2019-11-06 18:50:58,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-06 18:50:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2019-11-06 18:50:58,261 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 19 [2019-11-06 18:50:58,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:58,263 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2019-11-06 18:50:58,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:50:58,263 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2019-11-06 18:50:58,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:50:58,265 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:58,265 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:58,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:58,470 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:58,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:58,471 INFO L82 PathProgramCache]: Analyzing trace with hash -306641421, now seen corresponding path program 1 times [2019-11-06 18:50:58,471 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:58,472 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274621923] [2019-11-06 18:50:58,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:58,482 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:58,482 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204004116] [2019-11-06 18:50:58,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:58,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:50:58,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:58,569 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274621923] [2019-11-06 18:50:58,569 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:58,569 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204004116] [2019-11-06 18:50:58,569 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:58,570 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-06 18:50:58,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351062521] [2019-11-06 18:50:58,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:50:58,571 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:58,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:50:58,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:50:58,571 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 5 states. [2019-11-06 18:50:58,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:58,696 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2019-11-06 18:50:58,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:50:58,696 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-11-06 18:50:58,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:58,697 INFO L225 Difference]: With dead ends: 69 [2019-11-06 18:50:58,698 INFO L226 Difference]: Without dead ends: 45 [2019-11-06 18:50:58,698 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:50:58,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-06 18:50:58,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2019-11-06 18:50:58,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-06 18:50:58,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-11-06 18:50:58,714 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 20 [2019-11-06 18:50:58,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:58,715 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-11-06 18:50:58,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:50:58,715 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-11-06 18:50:58,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 18:50:58,716 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:58,716 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:58,921 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:58,922 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:58,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:58,923 INFO L82 PathProgramCache]: Analyzing trace with hash -2003830142, now seen corresponding path program 2 times [2019-11-06 18:50:58,923 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:58,924 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780445594] [2019-11-06 18:50:58,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:58,937 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:58,937 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044016605] [2019-11-06 18:50:58,937 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:59,009 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-06 18:50:59,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:59,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:50:59,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:50:59,034 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780445594] [2019-11-06 18:50:59,035 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:59,035 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044016605] [2019-11-06 18:50:59,035 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:59,035 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:50:59,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630948860] [2019-11-06 18:50:59,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:50:59,036 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:59,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:50:59,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:59,037 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 4 states. [2019-11-06 18:50:59,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:59,114 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2019-11-06 18:50:59,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:50:59,114 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-11-06 18:50:59,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:59,115 INFO L225 Difference]: With dead ends: 76 [2019-11-06 18:50:59,116 INFO L226 Difference]: Without dead ends: 60 [2019-11-06 18:50:59,116 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:59,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-06 18:50:59,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2019-11-06 18:50:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 18:50:59,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2019-11-06 18:50:59,126 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 21 [2019-11-06 18:50:59,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:59,126 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2019-11-06 18:50:59,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:50:59,127 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2019-11-06 18:50:59,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 18:50:59,128 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:59,128 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:59,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:59,332 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:59,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:59,333 INFO L82 PathProgramCache]: Analyzing trace with hash -851590433, now seen corresponding path program 1 times [2019-11-06 18:50:59,334 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:59,334 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655840436] [2019-11-06 18:50:59,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:59,343 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:59,343 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895079094] [2019-11-06 18:50:59,344 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 [2019-11-06 18:50:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:59,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:50:59,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:50:59,433 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655840436] [2019-11-06 18:50:59,433 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:59,434 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895079094] [2019-11-06 18:50:59,434 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:59,434 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-06 18:50:59,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759209870] [2019-11-06 18:50:59,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:50:59,435 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:59,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:50:59,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:50:59,436 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 6 states. [2019-11-06 18:50:59,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:59,537 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2019-11-06 18:50:59,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:50:59,538 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-11-06 18:50:59,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:59,539 INFO L225 Difference]: With dead ends: 83 [2019-11-06 18:50:59,539 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 18:50:59,540 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:50:59,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 18:50:59,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2019-11-06 18:50:59,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 18:50:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2019-11-06 18:50:59,549 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 30 [2019-11-06 18:50:59,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:59,550 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2019-11-06 18:50:59,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:50:59,550 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2019-11-06 18:50:59,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 18:50:59,551 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:59,551 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:59,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:59,756 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:59,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:59,757 INFO L82 PathProgramCache]: Analyzing trace with hash -241858451, now seen corresponding path program 2 times [2019-11-06 18:50:59,757 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:59,757 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071087441] [2019-11-06 18:50:59,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:59,766 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:59,766 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818736595] [2019-11-06 18:50:59,766 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 [2019-11-06 18:50:59,825 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:50:59,825 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:59,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:50:59,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:50:59,881 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071087441] [2019-11-06 18:50:59,882 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:59,882 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818736595] [2019-11-06 18:50:59,883 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:59,883 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 18:50:59,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188158274] [2019-11-06 18:50:59,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:50:59,884 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:59,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:50:59,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:50:59,884 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 7 states. [2019-11-06 18:51:00,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:00,009 INFO L93 Difference]: Finished difference Result 97 states and 124 transitions. [2019-11-06 18:51:00,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:51:00,010 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2019-11-06 18:51:00,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:00,011 INFO L225 Difference]: With dead ends: 97 [2019-11-06 18:51:00,011 INFO L226 Difference]: Without dead ends: 58 [2019-11-06 18:51:00,011 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:51:00,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-06 18:51:00,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2019-11-06 18:51:00,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 18:51:00,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2019-11-06 18:51:00,033 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 34 [2019-11-06 18:51:00,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:00,034 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2019-11-06 18:51:00,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:51:00,034 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2019-11-06 18:51:00,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 18:51:00,036 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:00,036 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:00,239 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:00,240 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:00,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:00,241 INFO L82 PathProgramCache]: Analyzing trace with hash -123740257, now seen corresponding path program 3 times [2019-11-06 18:51:00,241 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:00,242 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383225937] [2019-11-06 18:51:00,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:00,251 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:00,252 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674383828] [2019-11-06 18:51:00,252 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:00,298 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 18:51:00,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:00,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:51:00,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-06 18:51:00,333 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383225937] [2019-11-06 18:51:00,334 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:00,334 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674383828] [2019-11-06 18:51:00,334 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:00,335 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-06 18:51:00,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399706965] [2019-11-06 18:51:00,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:51:00,336 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:00,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:51:00,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:51:00,337 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 4 states. [2019-11-06 18:51:00,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:00,387 INFO L93 Difference]: Finished difference Result 105 states and 130 transitions. [2019-11-06 18:51:00,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:51:00,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2019-11-06 18:51:00,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:00,389 INFO L225 Difference]: With dead ends: 105 [2019-11-06 18:51:00,389 INFO L226 Difference]: Without dead ends: 66 [2019-11-06 18:51:00,390 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:51:00,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-06 18:51:00,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2019-11-06 18:51:00,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-06 18:51:00,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2019-11-06 18:51:00,405 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 38 [2019-11-06 18:51:00,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:00,406 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2019-11-06 18:51:00,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:51:00,406 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2019-11-06 18:51:00,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 18:51:00,408 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:00,408 INFO L410 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:00,611 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:00,612 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:00,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:00,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1198106045, now seen corresponding path program 4 times [2019-11-06 18:51:00,613 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:00,613 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091988317] [2019-11-06 18:51:00,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:00,621 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:00,621 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130902725] [2019-11-06 18:51:00,621 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:00,675 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:51:00,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:00,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:51:00,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-06 18:51:00,780 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091988317] [2019-11-06 18:51:00,780 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:00,780 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130902725] [2019-11-06 18:51:00,781 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:00,781 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 18:51:00,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563333211] [2019-11-06 18:51:00,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:51:00,781 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:00,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:51:00,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:51:00,782 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand 9 states. [2019-11-06 18:51:01,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:01,010 INFO L93 Difference]: Finished difference Result 147 states and 186 transitions. [2019-11-06 18:51:01,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:51:01,010 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2019-11-06 18:51:01,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:01,012 INFO L225 Difference]: With dead ends: 147 [2019-11-06 18:51:01,012 INFO L226 Difference]: Without dead ends: 125 [2019-11-06 18:51:01,016 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:51:01,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-11-06 18:51:01,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2019-11-06 18:51:01,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-06 18:51:01,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 93 transitions. [2019-11-06 18:51:01,035 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 93 transitions. Word has length 45 [2019-11-06 18:51:01,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:01,035 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 93 transitions. [2019-11-06 18:51:01,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:51:01,037 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 93 transitions. [2019-11-06 18:51:01,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-06 18:51:01,041 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:01,041 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:01,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:01,246 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:01,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:01,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1312433444, now seen corresponding path program 5 times [2019-11-06 18:51:01,247 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:01,247 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237544414] [2019-11-06 18:51:01,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:01,254 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:01,254 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738580333] [2019-11-06 18:51:01,255 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true