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/reducercommutativity/rangesum40.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:42:35,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:42:35,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:42:35,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:42:35,694 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:42:35,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:42:35,696 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:42:35,698 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:42:35,700 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:42:35,701 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:42:35,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:42:35,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:42:35,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:42:35,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:42:35,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:42:35,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:42:35,707 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:42:35,708 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:42:35,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:42:35,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:42:35,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:42:35,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:42:35,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:42:35,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:42:35,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:42:35,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:42:35,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:42:35,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:42:35,728 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:42:35,751 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:42:35,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:42:35,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:42:35,753 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:42:35,753 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:42:35,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:42:35,754 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:42:35,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:42:35,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:42:35,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:42:35,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:42:35,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:42:35,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:42:35,755 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:42:35,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:42:35,755 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:42:35,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:42:35,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:42:35,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:42:35,756 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:42:35,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:42:35,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:42:35,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:42:35,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:42:35,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:42:35,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:42:35,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:42:35,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:42:35,759 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:42:36,047 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:42:36,060 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:42:36,064 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:42:36,065 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:42:36,065 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:42:36,066 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum40.i [2019-10-14 23:42:36,139 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da3572911/ad48cfa6342e44a4b85f1224514d6e9f/FLAG34306d759 [2019-10-14 23:42:36,598 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:42:36,599 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum40.i [2019-10-14 23:42:36,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da3572911/ad48cfa6342e44a4b85f1224514d6e9f/FLAG34306d759 [2019-10-14 23:42:37,017 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da3572911/ad48cfa6342e44a4b85f1224514d6e9f [2019-10-14 23:42:37,026 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:42:37,028 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:42:37,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:37,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:42:37,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:42:37,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:37" (1/1) ... [2019-10-14 23:42:37,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3be6fe08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:37, skipping insertion in model container [2019-10-14 23:42:37,036 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:37" (1/1) ... [2019-10-14 23:42:37,043 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:42:37,061 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:42:37,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:37,289 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:42:37,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:37,409 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:42:37,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:37 WrapperNode [2019-10-14 23:42:37,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:37,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:42:37,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:42:37,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:42:37,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:37" (1/1) ... [2019-10-14 23:42:37,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:37" (1/1) ... [2019-10-14 23:42:37,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:37" (1/1) ... [2019-10-14 23:42:37,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:37" (1/1) ... [2019-10-14 23:42:37,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:37" (1/1) ... [2019-10-14 23:42:37,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:37" (1/1) ... [2019-10-14 23:42:37,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:37" (1/1) ... [2019-10-14 23:42:37,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:42:37,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:42:37,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:42:37,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:42:37,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:42:37,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:42:37,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:42:37,521 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2019-10-14 23:42:37,521 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2019-10-14 23:42:37,521 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:42:37,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:42:37,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:42:37,521 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2019-10-14 23:42:37,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:42:37,521 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2019-10-14 23:42:37,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:42:37,522 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:42:37,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:42:37,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:42:37,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:42:37,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:42:37,811 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:42:37,812 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 23:42:37,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:37 BoogieIcfgContainer [2019-10-14 23:42:37,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:42:37,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:42:37,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:42:37,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:42:37,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:42:37" (1/3) ... [2019-10-14 23:42:37,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509b4783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:37, skipping insertion in model container [2019-10-14 23:42:37,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:37" (2/3) ... [2019-10-14 23:42:37,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509b4783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:37, skipping insertion in model container [2019-10-14 23:42:37,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:37" (3/3) ... [2019-10-14 23:42:37,821 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum40.i [2019-10-14 23:42:37,830 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:42:37,837 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:42:37,848 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:42:37,871 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:42:37,871 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:42:37,872 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:42:37,872 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:42:37,872 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:42:37,872 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:42:37,872 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:42:37,872 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:42:37,889 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2019-10-14 23:42:37,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 23:42:37,896 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:37,897 INFO L380 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, 1, 1, 1] [2019-10-14 23:42:37,899 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:37,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:37,904 INFO L82 PathProgramCache]: Analyzing trace with hash -332770493, now seen corresponding path program 1 times [2019-10-14 23:42:37,913 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:37,913 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085487436] [2019-10-14 23:42:37,913 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:37,914 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:37,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,038 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085487436] [2019-10-14 23:42:38,039 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2019-10-14 23:42:38,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433762407] [2019-10-14 23:42:38,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-14 23:42:38,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 23:42:38,176 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:38,176 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:42:38,177 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741463100] [2019-10-14 23:42:38,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:42:38,182 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:38,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:42:38,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:42:38,199 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2019-10-14 23:42:38,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:38,224 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2019-10-14 23:42:38,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:42:38,226 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2019-10-14 23:42:38,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:38,235 INFO L225 Difference]: With dead ends: 64 [2019-10-14 23:42:38,235 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 23:42:38,239 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:42:38,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 23:42:38,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-14 23:42:38,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 23:42:38,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-10-14 23:42:38,278 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 37 [2019-10-14 23:42:38,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:38,279 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-10-14 23:42:38,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:42:38,279 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-10-14 23:42:38,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 23:42:38,282 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:38,282 INFO L380 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, 1, 1, 1] [2019-10-14 23:42:38,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:38,484 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:38,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:38,485 INFO L82 PathProgramCache]: Analyzing trace with hash -991975144, now seen corresponding path program 1 times [2019-10-14 23:42:38,486 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:38,486 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600250857] [2019-10-14 23:42:38,486 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:38,486 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:38,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:38,523 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:38,524 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708654908] [2019-10-14 23:42:38,524 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 [2019-10-14 23:42:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:42:38,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:42:38,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600250857] [2019-10-14 23:42:38,662 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:38,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708654908] [2019-10-14 23:42:38,663 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:38,663 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:42:38,663 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861830705] [2019-10-14 23:42:38,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:38,665 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:38,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:38,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:42:38,665 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 3 states. [2019-10-14 23:42:38,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:38,691 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2019-10-14 23:42:38,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:38,693 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-10-14 23:42:38,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:38,695 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:42:38,695 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 23:42:38,697 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:42:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 23:42:38,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-10-14 23:42:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:42:38,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-10-14 23:42:38,712 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 37 [2019-10-14 23:42:38,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:38,713 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-10-14 23:42:38,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:38,713 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-10-14 23:42:38,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 23:42:38,717 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:38,717 INFO L380 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, 1, 1, 1, 1, 1] [2019-10-14 23:42:38,921 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:38,922 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:38,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:38,923 INFO L82 PathProgramCache]: Analyzing trace with hash 479004822, now seen corresponding path program 1 times [2019-10-14 23:42:38,923 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:38,924 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672007330] [2019-10-14 23:42:38,924 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:38,925 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:38,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:38,940 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:38,941 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575095707] [2019-10-14 23:42:38,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:39,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:39,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:42:39,027 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672007330] [2019-10-14 23:42:39,028 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:39,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575095707] [2019-10-14 23:42:39,028 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:39,028 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:42:39,029 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821699366] [2019-10-14 23:42:39,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:39,029 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:39,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:39,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:42:39,030 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 3 states. [2019-10-14 23:42:39,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:39,471 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2019-10-14 23:42:39,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:39,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-10-14 23:42:39,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:39,474 INFO L225 Difference]: With dead ends: 57 [2019-10-14 23:42:39,475 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 23:42:39,475 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:42:39,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 23:42:39,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-10-14 23:42:39,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 23:42:39,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-10-14 23:42:39,485 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 39 [2019-10-14 23:42:39,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:39,485 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-10-14 23:42:39,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:39,486 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-10-14 23:42:39,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 23:42:39,487 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:39,487 INFO L380 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, 1, 1, 1, 1, 1] [2019-10-14 23:42:39,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:39,692 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:39,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:39,693 INFO L82 PathProgramCache]: Analyzing trace with hash -22870507, now seen corresponding path program 1 times [2019-10-14 23:42:39,693 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:39,694 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503716726] [2019-10-14 23:42:39,694 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:39,694 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:39,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:39,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:42:39,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503716726] [2019-10-14 23:42:39,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554630876] [2019-10-14 23:42:39,855 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 [2019-10-14 23:42:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:42:39,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:42:39,921 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:39,921 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-10-14 23:42:39,921 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42301756] [2019-10-14 23:42:39,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:39,922 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:39,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:39,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:42:39,923 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 3 states. [2019-10-14 23:42:39,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:39,945 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2019-10-14 23:42:39,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:39,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-10-14 23:42:39,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:39,948 INFO L225 Difference]: With dead ends: 62 [2019-10-14 23:42:39,948 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 23:42:39,949 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:42:39,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 23:42:39,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-10-14 23:42:39,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 23:42:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2019-10-14 23:42:39,955 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 39 [2019-10-14 23:42:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:39,956 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2019-10-14 23:42:39,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:39,956 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2019-10-14 23:42:39,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 23:42:39,957 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:39,957 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1] [2019-10-14 23:42:40,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:40,159 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:40,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:40,160 INFO L82 PathProgramCache]: Analyzing trace with hash 496221539, now seen corresponding path program 1 times [2019-10-14 23:42:40,160 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:40,161 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312180336] [2019-10-14 23:42:40,161 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:40,161 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:40,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:42:40,269 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312180336] [2019-10-14 23:42:40,269 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708920541] [2019-10-14 23:42:40,269 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 [2019-10-14 23:42:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:42:40,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:40,391 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 23:42:40,391 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:40,391 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 23:42:40,392 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778023195] [2019-10-14 23:42:40,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:40,394 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:40,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:40,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:40,394 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 3 states. [2019-10-14 23:42:40,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:40,411 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2019-10-14 23:42:40,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:40,415 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2019-10-14 23:42:40,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:40,416 INFO L225 Difference]: With dead ends: 60 [2019-10-14 23:42:40,416 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 23:42:40,417 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:40,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 23:42:40,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-10-14 23:42:40,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 23:42:40,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2019-10-14 23:42:40,430 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 48 [2019-10-14 23:42:40,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:40,431 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2019-10-14 23:42:40,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:40,431 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2019-10-14 23:42:40,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 23:42:40,432 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:40,432 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:40,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:40,637 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:40,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:40,638 INFO L82 PathProgramCache]: Analyzing trace with hash 125205893, now seen corresponding path program 1 times [2019-10-14 23:42:40,638 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:40,639 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292298742] [2019-10-14 23:42:40,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:40,640 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:40,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:40,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:42:40,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292298742] [2019-10-14 23:42:40,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976170669] [2019-10-14 23:42:40,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:40,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:42:40,841 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:40,841 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-14 23:42:40,842 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330749483] [2019-10-14 23:42:40,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:42:40,842 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:40,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:42:40,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:42:40,843 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 8 states. [2019-10-14 23:42:41,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:41,080 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2019-10-14 23:42:41,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:42:41,083 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2019-10-14 23:42:41,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:41,084 INFO L225 Difference]: With dead ends: 76 [2019-10-14 23:42:41,085 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 23:42:41,085 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:42:41,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 23:42:41,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-10-14 23:42:41,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 23:42:41,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2019-10-14 23:42:41,099 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 50 [2019-10-14 23:42:41,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:41,099 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2019-10-14 23:42:41,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:42:41,100 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2019-10-14 23:42:41,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-14 23:42:41,101 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:41,102 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2019-10-14 23:42:41,302 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:41,303 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:41,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:41,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1369912335, now seen corresponding path program 2 times [2019-10-14 23:42:41,305 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:41,305 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633512969] [2019-10-14 23:42:41,306 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:41,306 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:41,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:41,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 23:42:41,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633512969] [2019-10-14 23:42:41,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466407827] [2019-10-14 23:42:41,451 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:41,515 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:41,515 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:41,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:41,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:41,565 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-14 23:42:41,565 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:41,565 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-10-14 23:42:41,566 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137146263] [2019-10-14 23:42:41,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:42:41,568 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:41,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:42:41,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:41,568 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 9 states. [2019-10-14 23:42:41,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:41,813 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2019-10-14 23:42:41,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:42:41,814 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2019-10-14 23:42:41,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:41,815 INFO L225 Difference]: With dead ends: 83 [2019-10-14 23:42:41,815 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 23:42:41,816 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:42:41,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 23:42:41,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2019-10-14 23:42:41,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 23:42:41,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2019-10-14 23:42:41,830 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 61 [2019-10-14 23:42:41,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:41,830 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2019-10-14 23:42:41,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:42:41,830 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2019-10-14 23:42:41,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-14 23:42:41,831 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:41,832 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2019-10-14 23:42:42,043 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:42,044 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:42,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:42,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1896448358, now seen corresponding path program 1 times [2019-10-14 23:42:42,044 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:42,045 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685850406] [2019-10-14 23:42:42,045 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:42,045 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:42,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:42,056 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:42,056 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587822204] [2019-10-14 23:42:42,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:42,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:42:42,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2019-10-14 23:42:42,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685850406] [2019-10-14 23:42:42,164 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:42,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587822204] [2019-10-14 23:42:42,164 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:42,164 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 23:42:42,164 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134709702] [2019-10-14 23:42:42,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:42:42,166 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:42,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:42:42,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:42,166 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 6 states. [2019-10-14 23:42:42,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:42,191 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2019-10-14 23:42:42,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:42:42,192 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2019-10-14 23:42:42,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:42,193 INFO L225 Difference]: With dead ends: 78 [2019-10-14 23:42:42,193 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 23:42:42,194 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:42,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 23:42:42,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2019-10-14 23:42:42,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 23:42:42,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2019-10-14 23:42:42,205 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 72 [2019-10-14 23:42:42,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:42,206 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2019-10-14 23:42:42,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:42:42,206 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2019-10-14 23:42:42,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-14 23:42:42,207 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:42,207 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 3, 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, 1, 1, 1, 1, 1] [2019-10-14 23:42:42,410 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:42,411 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:42,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:42,412 INFO L82 PathProgramCache]: Analyzing trace with hash 2135261480, now seen corresponding path program 2 times [2019-10-14 23:42:42,412 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:42,413 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104867713] [2019-10-14 23:42:42,413 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:42,413 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:42,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:42,423 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:42,424 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107904380] [2019-10-14 23:42:42,424 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:42,480 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:42,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:42,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:42:42,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2019-10-14 23:42:42,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104867713] [2019-10-14 23:42:42,537 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:42,538 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107904380] [2019-10-14 23:42:42,538 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:42,538 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:42:42,538 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381613087] [2019-10-14 23:42:42,539 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:42:42,539 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:42,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:42:42,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:42,540 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 7 states. [2019-10-14 23:42:42,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:42,564 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2019-10-14 23:42:42,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:42:42,565 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 74 [2019-10-14 23:42:42,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:42,566 INFO L225 Difference]: With dead ends: 80 [2019-10-14 23:42:42,566 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 23:42:42,567 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:42,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 23:42:42,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-10-14 23:42:42,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 23:42:42,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2019-10-14 23:42:42,573 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 74 [2019-10-14 23:42:42,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:42,573 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2019-10-14 23:42:42,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:42:42,573 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2019-10-14 23:42:42,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-14 23:42:42,575 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:42,575 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 6, 5, 5, 3, 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, 1, 1, 1, 1, 1] [2019-10-14 23:42:42,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:42,776 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:42,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:42,777 INFO L82 PathProgramCache]: Analyzing trace with hash -293562262, now seen corresponding path program 3 times [2019-10-14 23:42:42,778 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:42,778 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415265520] [2019-10-14 23:42:42,779 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:42,779 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:42,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:42,807 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:42,808 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [927585708] [2019-10-14 23:42:42,808 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 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 [2019-10-14 23:42:42,879 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:42:42,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:42,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:42,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2019-10-14 23:42:42,909 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415265520] [2019-10-14 23:42:42,909 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:42,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927585708] [2019-10-14 23:42:42,911 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:42,911 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-14 23:42:42,911 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982538308] [2019-10-14 23:42:42,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:42:42,912 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:42,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:42:42,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:42,912 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 4 states. [2019-10-14 23:42:42,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:42,928 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2019-10-14 23:42:42,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:42:42,929 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2019-10-14 23:42:42,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:42,930 INFO L225 Difference]: With dead ends: 72 [2019-10-14 23:42:42,930 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 23:42:42,930 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:42,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 23:42:42,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-10-14 23:42:42,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 23:42:42,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2019-10-14 23:42:42,936 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 76 [2019-10-14 23:42:42,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:42,937 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2019-10-14 23:42:42,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:42:42,937 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2019-10-14 23:42:42,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 23:42:42,938 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:42,938 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 6, 5, 5, 3, 3, 3, 3, 3, 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, 1, 1] [2019-10-14 23:42:43,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:43,142 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:43,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:43,143 INFO L82 PathProgramCache]: Analyzing trace with hash 704023820, now seen corresponding path program 4 times [2019-10-14 23:42:43,144 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:43,144 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343720966] [2019-10-14 23:42:43,145 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:43,145 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:43,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:43,154 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:43,155 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48491351] [2019-10-14 23:42:43,155 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:43,209 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:43,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:43,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:43,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:43,231 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 79 proven. 7 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-10-14 23:42:43,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343720966] [2019-10-14 23:42:43,231 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:43,232 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48491351] [2019-10-14 23:42:43,232 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:43,232 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 23:42:43,234 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187333771] [2019-10-14 23:42:43,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:42:43,235 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:43,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:42:43,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:42:43,238 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 5 states. [2019-10-14 23:42:43,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:43,269 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2019-10-14 23:42:43,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:42:43,270 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2019-10-14 23:42:43,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:43,271 INFO L225 Difference]: With dead ends: 83 [2019-10-14 23:42:43,271 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 23:42:43,272 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:42:43,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 23:42:43,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-10-14 23:42:43,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-14 23:42:43,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2019-10-14 23:42:43,281 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 78 [2019-10-14 23:42:43,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:43,282 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2019-10-14 23:42:43,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:42:43,282 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2019-10-14 23:42:43,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-14 23:42:43,283 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:43,283 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 9, 5, 5, 3, 3, 3, 3, 3, 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, 1, 1] [2019-10-14 23:42:43,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:43,484 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:43,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:43,485 INFO L82 PathProgramCache]: Analyzing trace with hash -40278520, now seen corresponding path program 5 times [2019-10-14 23:42:43,485 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:43,486 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116137170] [2019-10-14 23:42:43,486 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:43,486 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:43,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:43,498 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:43,498 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365088501] [2019-10-14 23:42:43,499 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:43,537 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:43,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:43,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:43,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-14 23:42:43,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116137170] [2019-10-14 23:42:43,570 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:43,571 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365088501] [2019-10-14 23:42:43,571 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:43,571 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 23:42:43,571 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253237062] [2019-10-14 23:42:43,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:42:43,572 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:43,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:42:43,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:42:43,572 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 5 states. [2019-10-14 23:42:43,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:43,608 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2019-10-14 23:42:43,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:42:43,609 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2019-10-14 23:42:43,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:43,611 INFO L225 Difference]: With dead ends: 90 [2019-10-14 23:42:43,611 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 23:42:43,611 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:42:43,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 23:42:43,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-10-14 23:42:43,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 23:42:43,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2019-10-14 23:42:43,618 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 87 [2019-10-14 23:42:43,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:43,618 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2019-10-14 23:42:43,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:42:43,619 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2019-10-14 23:42:43,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-14 23:42:43,620 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:43,620 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 3, 3, 3, 3, 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, 1, 1] [2019-10-14 23:42:43,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:43,824 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:43,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:43,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1679580114, now seen corresponding path program 6 times [2019-10-14 23:42:43,824 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:43,824 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294502083] [2019-10-14 23:42:43,824 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:43,824 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:43,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:43,836 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:43,836 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [466499805] [2019-10-14 23:42:43,836 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:43,940 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-10-14 23:42:43,940 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:43,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:42:43,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 195 proven. 7 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2019-10-14 23:42:43,967 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294502083] [2019-10-14 23:42:43,967 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:43,967 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466499805] [2019-10-14 23:42:43,967 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:43,968 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 23:42:43,968 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958766426] [2019-10-14 23:42:43,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:42:43,968 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:43,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:42:43,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:43,969 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 6 states. [2019-10-14 23:42:44,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:44,009 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2019-10-14 23:42:44,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:42:44,009 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2019-10-14 23:42:44,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:44,010 INFO L225 Difference]: With dead ends: 96 [2019-10-14 23:42:44,010 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 23:42:44,011 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:44,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 23:42:44,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2019-10-14 23:42:44,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-14 23:42:44,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2019-10-14 23:42:44,017 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 96 [2019-10-14 23:42:44,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:44,017 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2019-10-14 23:42:44,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:42:44,017 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2019-10-14 23:42:44,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-14 23:42:44,019 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:44,019 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 5, 5, 3, 3, 3, 3, 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, 1, 1] [2019-10-14 23:42:44,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:44,223 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:44,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:44,224 INFO L82 PathProgramCache]: Analyzing trace with hash -726581688, now seen corresponding path program 7 times [2019-10-14 23:42:44,225 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:44,225 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599950186] [2019-10-14 23:42:44,225 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:44,226 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:44,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:44,241 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:44,241 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295694641] [2019-10-14 23:42:44,242 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:42:44,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-10-14 23:42:44,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599950186] [2019-10-14 23:42:44,354 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:44,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295694641] [2019-10-14 23:42:44,354 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:44,355 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:42:44,355 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307194115] [2019-10-14 23:42:44,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:42:44,355 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:44,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:42:44,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:42:44,356 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 8 states. [2019-10-14 23:42:44,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:44,379 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2019-10-14 23:42:44,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:42:44,380 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 105 [2019-10-14 23:42:44,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:44,380 INFO L225 Difference]: With dead ends: 104 [2019-10-14 23:42:44,381 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 23:42:44,381 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:42:44,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 23:42:44,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2019-10-14 23:42:44,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-14 23:42:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2019-10-14 23:42:44,387 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 105 [2019-10-14 23:42:44,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:44,387 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2019-10-14 23:42:44,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:42:44,387 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2019-10-14 23:42:44,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-14 23:42:44,388 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:44,388 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 6, 6, 3, 3, 3, 3, 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, 1, 1] [2019-10-14 23:42:44,592 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:44,592 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:44,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:44,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1337737530, now seen corresponding path program 8 times [2019-10-14 23:42:44,594 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:44,594 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022189878] [2019-10-14 23:42:44,594 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:44,594 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:44,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:44,604 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:44,607 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202455629] [2019-10-14 23:42:44,607 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:44,685 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:44,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:44,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:42:44,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-10-14 23:42:44,744 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022189878] [2019-10-14 23:42:44,744 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:44,744 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202455629] [2019-10-14 23:42:44,745 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:44,745 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:42:44,745 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440492580] [2019-10-14 23:42:44,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:42:44,746 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:44,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:42:44,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:44,746 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 9 states. [2019-10-14 23:42:44,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:44,782 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2019-10-14 23:42:44,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:42:44,783 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 107 [2019-10-14 23:42:44,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:44,784 INFO L225 Difference]: With dead ends: 106 [2019-10-14 23:42:44,784 INFO L226 Difference]: Without dead ends: 65 [2019-10-14 23:42:44,785 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:44,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-14 23:42:44,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-10-14 23:42:44,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-14 23:42:44,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2019-10-14 23:42:44,790 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 107 [2019-10-14 23:42:44,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:44,790 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2019-10-14 23:42:44,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:42:44,790 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2019-10-14 23:42:44,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-14 23:42:44,791 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:44,792 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 7, 7, 3, 3, 3, 3, 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, 1, 1] [2019-10-14 23:42:44,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:44,992 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:44,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:44,993 INFO L82 PathProgramCache]: Analyzing trace with hash -247982140, now seen corresponding path program 9 times [2019-10-14 23:42:44,993 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:44,993 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201838640] [2019-10-14 23:42:44,993 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:44,993 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:44,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:45,004 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:45,004 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15347132] [2019-10-14 23:42:45,004 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:45,145 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:42:45,145 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:45,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:45,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 250 proven. 4 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2019-10-14 23:42:45,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201838640] [2019-10-14 23:42:45,185 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:45,185 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15347132] [2019-10-14 23:42:45,185 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:45,185 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 23:42:45,186 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242566100] [2019-10-14 23:42:45,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:42:45,186 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:45,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:42:45,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:42:45,187 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 5 states. [2019-10-14 23:42:45,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:45,207 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2019-10-14 23:42:45,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:42:45,208 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2019-10-14 23:42:45,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:45,209 INFO L225 Difference]: With dead ends: 96 [2019-10-14 23:42:45,209 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 23:42:45,209 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:42:45,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 23:42:45,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-10-14 23:42:45,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-14 23:42:45,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2019-10-14 23:42:45,217 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 109 [2019-10-14 23:42:45,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:45,218 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2019-10-14 23:42:45,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:42:45,218 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2019-10-14 23:42:45,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-14 23:42:45,219 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:45,220 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 7, 7, 3, 3, 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, 1, 1, 1] [2019-10-14 23:42:45,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:45,424 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:45,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:45,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1544882658, now seen corresponding path program 10 times [2019-10-14 23:42:45,425 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:45,426 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690022154] [2019-10-14 23:42:45,426 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:45,426 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:45,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:45,437 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:45,437 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808807564] [2019-10-14 23:42:45,438 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:45,535 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:45,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:45,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:42:45,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2019-10-14 23:42:45,594 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690022154] [2019-10-14 23:42:45,594 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:45,594 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808807564] [2019-10-14 23:42:45,594 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:45,594 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:42:45,595 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977888398] [2019-10-14 23:42:45,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:42:45,595 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:45,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:42:45,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:42:45,596 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 10 states. [2019-10-14 23:42:45,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:45,631 INFO L93 Difference]: Finished difference Result 112 states and 128 transitions. [2019-10-14 23:42:45,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:42:45,631 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 111 [2019-10-14 23:42:45,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:45,632 INFO L225 Difference]: With dead ends: 112 [2019-10-14 23:42:45,632 INFO L226 Difference]: Without dead ends: 69 [2019-10-14 23:42:45,633 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:42:45,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-14 23:42:45,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-10-14 23:42:45,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-14 23:42:45,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2019-10-14 23:42:45,638 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 111 [2019-10-14 23:42:45,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:45,638 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2019-10-14 23:42:45,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:42:45,638 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2019-10-14 23:42:45,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-14 23:42:45,639 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:45,639 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 8, 8, 3, 3, 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, 1, 1, 1] [2019-10-14 23:42:45,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:45,843 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:45,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:45,844 INFO L82 PathProgramCache]: Analyzing trace with hash -384257056, now seen corresponding path program 11 times [2019-10-14 23:42:45,844 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:45,844 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740799270] [2019-10-14 23:42:45,845 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:45,845 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:45,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:45,855 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:45,855 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755445860] [2019-10-14 23:42:45,855 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:45,903 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-14 23:42:45,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:45,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:42:45,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:45,964 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 273 proven. 15 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2019-10-14 23:42:45,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740799270] [2019-10-14 23:42:45,964 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:45,965 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755445860] [2019-10-14 23:42:45,965 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:45,965 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:42:45,965 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716935899] [2019-10-14 23:42:45,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:42:45,967 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:45,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:42:45,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:45,968 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 7 states. [2019-10-14 23:42:45,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:45,998 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2019-10-14 23:42:45,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:42:46,000 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2019-10-14 23:42:46,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:46,000 INFO L225 Difference]: With dead ends: 112 [2019-10-14 23:42:46,001 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 23:42:46,001 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:46,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 23:42:46,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2019-10-14 23:42:46,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 23:42:46,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2019-10-14 23:42:46,009 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 113 [2019-10-14 23:42:46,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:46,009 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2019-10-14 23:42:46,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:42:46,009 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2019-10-14 23:42:46,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-14 23:42:46,011 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:46,012 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 3, 3, 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, 1, 1, 1] [2019-10-14 23:42:46,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:46,215 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:46,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:46,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1242518650, now seen corresponding path program 12 times [2019-10-14 23:42:46,216 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:46,217 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857119868] [2019-10-14 23:42:46,217 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:46,217 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:46,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:46,228 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:46,229 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042284101] [2019-10-14 23:42:46,229 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:46,397 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-14 23:42:46,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:46,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:42:46,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:46,427 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 332 proven. 9 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2019-10-14 23:42:46,428 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857119868] [2019-10-14 23:42:46,428 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:46,428 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042284101] [2019-10-14 23:42:46,428 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:46,428 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 23:42:46,428 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021477308] [2019-10-14 23:42:46,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:42:46,429 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:46,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:42:46,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:46,429 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand 6 states. [2019-10-14 23:42:46,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:46,458 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2019-10-14 23:42:46,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:42:46,458 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2019-10-14 23:42:46,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:46,459 INFO L225 Difference]: With dead ends: 106 [2019-10-14 23:42:46,459 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 23:42:46,460 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:46,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 23:42:46,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-14 23:42:46,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 23:42:46,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2019-10-14 23:42:46,467 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 122 [2019-10-14 23:42:46,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:46,469 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2019-10-14 23:42:46,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:42:46,469 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2019-10-14 23:42:46,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-14 23:42:46,470 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:46,470 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 4, 4, 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, 1, 1, 1] [2019-10-14 23:42:46,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:46,671 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:46,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:46,672 INFO L82 PathProgramCache]: Analyzing trace with hash 815463068, now seen corresponding path program 13 times [2019-10-14 23:42:46,672 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:46,673 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437910109] [2019-10-14 23:42:46,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:46,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:46,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:46,684 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:46,684 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822931128] [2019-10-14 23:42:46,685 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:42:46,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2019-10-14 23:42:46,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437910109] [2019-10-14 23:42:46,851 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:46,852 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822931128] [2019-10-14 23:42:46,852 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:46,852 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-14 23:42:46,852 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563858797] [2019-10-14 23:42:46,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:42:46,853 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:46,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:42:46,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:42:46,853 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 11 states. [2019-10-14 23:42:46,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:46,886 INFO L93 Difference]: Finished difference Result 124 states and 142 transitions. [2019-10-14 23:42:46,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:42:46,887 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 124 [2019-10-14 23:42:46,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:46,887 INFO L225 Difference]: With dead ends: 124 [2019-10-14 23:42:46,887 INFO L226 Difference]: Without dead ends: 76 [2019-10-14 23:42:46,888 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:42:46,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-14 23:42:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-10-14 23:42:46,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-14 23:42:46,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2019-10-14 23:42:46,893 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 124 [2019-10-14 23:42:46,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:46,893 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2019-10-14 23:42:46,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:42:46,893 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2019-10-14 23:42:46,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-14 23:42:46,894 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:46,894 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 9, 9, 4, 4, 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, 1, 1, 1] [2019-10-14 23:42:47,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:47,105 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:47,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:47,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1533018786, now seen corresponding path program 14 times [2019-10-14 23:42:47,105 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:47,106 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272911025] [2019-10-14 23:42:47,106 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:47,106 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:47,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:47,118 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:47,118 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088263814] [2019-10-14 23:42:47,118 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:47,200 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:47,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:47,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 23:42:47,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2019-10-14 23:42:47,294 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272911025] [2019-10-14 23:42:47,294 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:47,294 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088263814] [2019-10-14 23:42:47,294 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:47,294 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-14 23:42:47,294 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054577957] [2019-10-14 23:42:47,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:42:47,295 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:47,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:42:47,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:47,296 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand 12 states. [2019-10-14 23:42:47,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:47,330 INFO L93 Difference]: Finished difference Result 126 states and 144 transitions. [2019-10-14 23:42:47,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:42:47,330 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2019-10-14 23:42:47,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:47,331 INFO L225 Difference]: With dead ends: 126 [2019-10-14 23:42:47,331 INFO L226 Difference]: Without dead ends: 78 [2019-10-14 23:42:47,332 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:47,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-14 23:42:47,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-10-14 23:42:47,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 23:42:47,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2019-10-14 23:42:47,337 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 126 [2019-10-14 23:42:47,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:47,338 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2019-10-14 23:42:47,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:42:47,338 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2019-10-14 23:42:47,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-14 23:42:47,339 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:47,340 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 12, 10, 10, 9, 4, 4, 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, 1, 1, 1] [2019-10-14 23:42:47,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:47,545 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:47,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:47,545 INFO L82 PathProgramCache]: Analyzing trace with hash 728717216, now seen corresponding path program 15 times [2019-10-14 23:42:47,546 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:47,546 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329494146] [2019-10-14 23:42:47,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:47,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:47,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:47,557 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:47,557 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700848959] [2019-10-14 23:42:47,557 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:47,779 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 23:42:47,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:47,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:42:47,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 332 proven. 16 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2019-10-14 23:42:47,820 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329494146] [2019-10-14 23:42:47,820 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:47,820 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700848959] [2019-10-14 23:42:47,820 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:47,821 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:42:47,821 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949029991] [2019-10-14 23:42:47,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:42:47,821 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:47,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:42:47,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:47,822 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 7 states. [2019-10-14 23:42:47,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:47,850 INFO L93 Difference]: Finished difference Result 112 states and 127 transitions. [2019-10-14 23:42:47,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:42:47,850 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 128 [2019-10-14 23:42:47,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:47,851 INFO L225 Difference]: With dead ends: 112 [2019-10-14 23:42:47,851 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 23:42:47,852 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:47,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 23:42:47,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-10-14 23:42:47,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-14 23:42:47,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2019-10-14 23:42:47,858 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 128 [2019-10-14 23:42:47,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:47,858 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2019-10-14 23:42:47,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:42:47,858 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2019-10-14 23:42:47,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-14 23:42:47,860 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:47,860 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 12, 10, 10, 9, 5, 5, 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, 1, 1, 1] [2019-10-14 23:42:48,060 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:48,061 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:48,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:48,062 INFO L82 PathProgramCache]: Analyzing trace with hash 973524034, now seen corresponding path program 16 times [2019-10-14 23:42:48,062 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:48,063 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529116263] [2019-10-14 23:42:48,063 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:48,063 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:48,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:48,078 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:48,078 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903460209] [2019-10-14 23:42:48,079 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:48,171 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:48,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:48,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 23:42:48,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:48,285 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2019-10-14 23:42:48,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529116263] [2019-10-14 23:42:48,285 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:48,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903460209] [2019-10-14 23:42:48,286 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:48,286 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-14 23:42:48,286 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741985785] [2019-10-14 23:42:48,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:42:48,286 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:48,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:42:48,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:42:48,287 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 13 states. [2019-10-14 23:42:48,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:48,329 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2019-10-14 23:42:48,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:42:48,329 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 130 [2019-10-14 23:42:48,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:48,330 INFO L225 Difference]: With dead ends: 132 [2019-10-14 23:42:48,330 INFO L226 Difference]: Without dead ends: 82 [2019-10-14 23:42:48,331 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:42:48,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-14 23:42:48,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2019-10-14 23:42:48,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-14 23:42:48,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2019-10-14 23:42:48,337 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 130 [2019-10-14 23:42:48,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:48,337 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2019-10-14 23:42:48,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:42:48,338 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2019-10-14 23:42:48,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-14 23:42:48,340 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:48,340 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 12, 11, 11, 9, 5, 5, 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, 1, 1, 1] [2019-10-14 23:42:48,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:48,545 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:48,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:48,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1187302012, now seen corresponding path program 17 times [2019-10-14 23:42:48,546 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:48,546 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673814542] [2019-10-14 23:42:48,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:48,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:48,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:48,558 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:48,558 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407690287] [2019-10-14 23:42:48,558 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:48,683 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-14 23:42:48,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:48,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:42:48,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 363 proven. 26 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-10-14 23:42:48,729 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673814542] [2019-10-14 23:42:48,730 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:48,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407690287] [2019-10-14 23:42:48,730 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:48,730 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:42:48,730 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994698007] [2019-10-14 23:42:48,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:42:48,733 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:48,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:42:48,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:42:48,733 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 8 states. [2019-10-14 23:42:48,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:48,776 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2019-10-14 23:42:48,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:42:48,777 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 132 [2019-10-14 23:42:48,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:48,778 INFO L225 Difference]: With dead ends: 132 [2019-10-14 23:42:48,778 INFO L226 Difference]: Without dead ends: 86 [2019-10-14 23:42:48,778 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:42:48,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-14 23:42:48,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2019-10-14 23:42:48,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-10-14 23:42:48,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2019-10-14 23:42:48,784 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 132 [2019-10-14 23:42:48,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:48,784 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2019-10-14 23:42:48,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:42:48,784 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2019-10-14 23:42:48,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-14 23:42:48,785 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:48,785 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 15, 11, 11, 9, 5, 5, 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, 1, 1, 1] [2019-10-14 23:42:48,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:48,986 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:48,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:48,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1078049194, now seen corresponding path program 18 times [2019-10-14 23:42:48,987 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:48,987 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276263369] [2019-10-14 23:42:48,988 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:48,988 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:48,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:49,010 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:49,010 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119114653] [2019-10-14 23:42:49,011 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:51,352 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 23:42:51,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:51,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:42:51,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1061 backedges. 426 proven. 25 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-10-14 23:42:51,389 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276263369] [2019-10-14 23:42:51,389 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:51,389 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119114653] [2019-10-14 23:42:51,390 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:51,390 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:42:51,390 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720735557] [2019-10-14 23:42:51,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:42:51,390 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:51,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:42:51,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:42:51,391 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 8 states. [2019-10-14 23:42:51,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:51,425 INFO L93 Difference]: Finished difference Result 122 states and 139 transitions. [2019-10-14 23:42:51,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:42:51,425 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 141 [2019-10-14 23:42:51,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:51,427 INFO L225 Difference]: With dead ends: 122 [2019-10-14 23:42:51,427 INFO L226 Difference]: Without dead ends: 87 [2019-10-14 23:42:51,427 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:42:51,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-10-14 23:42:51,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-10-14 23:42:51,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-14 23:42:51,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2019-10-14 23:42:51,433 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 141 [2019-10-14 23:42:51,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:51,434 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2019-10-14 23:42:51,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:42:51,434 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2019-10-14 23:42:51,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-14 23:42:51,435 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:51,435 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 15, 11, 11, 9, 6, 6, 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, 1, 1, 1] [2019-10-14 23:42:51,640 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:51,640 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:51,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:51,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1446854004, now seen corresponding path program 19 times [2019-10-14 23:42:51,641 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:51,641 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454586232] [2019-10-14 23:42:51,642 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:51,642 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:51,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:51,652 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:51,653 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701227974] [2019-10-14 23:42:51,653 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:51,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:42:51,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 951 trivial. 0 not checked. [2019-10-14 23:42:51,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454586232] [2019-10-14 23:42:51,838 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:51,839 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701227974] [2019-10-14 23:42:51,839 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:51,839 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-14 23:42:51,839 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165226377] [2019-10-14 23:42:51,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:42:51,840 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:51,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:42:51,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:42:51,840 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand 14 states. [2019-10-14 23:42:51,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:51,888 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2019-10-14 23:42:51,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:42:51,889 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 143 [2019-10-14 23:42:51,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:51,889 INFO L225 Difference]: With dead ends: 144 [2019-10-14 23:42:51,890 INFO L226 Difference]: Without dead ends: 89 [2019-10-14 23:42:51,890 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:42:51,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-14 23:42:51,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-10-14 23:42:51,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-10-14 23:42:51,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2019-10-14 23:42:51,895 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 143 [2019-10-14 23:42:51,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:51,896 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2019-10-14 23:42:51,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:42:51,896 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2019-10-14 23:42:51,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-14 23:42:51,897 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:51,897 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 15, 12, 12, 9, 6, 6, 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, 1, 1, 1] [2019-10-14 23:42:52,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:52,101 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:52,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:52,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1583968114, now seen corresponding path program 20 times [2019-10-14 23:42:52,102 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:52,103 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727602063] [2019-10-14 23:42:52,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:52,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:52,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:52,115 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:52,115 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46298116] [2019-10-14 23:42:52,115 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:52,197 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:52,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:52,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 23:42:52,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 951 trivial. 0 not checked. [2019-10-14 23:42:52,329 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727602063] [2019-10-14 23:42:52,329 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:52,329 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46298116] [2019-10-14 23:42:52,329 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:52,329 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-14 23:42:52,329 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676421635] [2019-10-14 23:42:52,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:42:52,330 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:52,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:42:52,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:42:52,330 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand 15 states. [2019-10-14 23:42:52,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:52,382 INFO L93 Difference]: Finished difference Result 146 states and 166 transitions. [2019-10-14 23:42:52,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 23:42:52,382 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 145 [2019-10-14 23:42:52,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:52,383 INFO L225 Difference]: With dead ends: 146 [2019-10-14 23:42:52,383 INFO L226 Difference]: Without dead ends: 91 [2019-10-14 23:42:52,384 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:42:52,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-14 23:42:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2019-10-14 23:42:52,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-14 23:42:52,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2019-10-14 23:42:52,389 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 145 [2019-10-14 23:42:52,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:52,389 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2019-10-14 23:42:52,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:42:52,389 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2019-10-14 23:42:52,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-14 23:42:52,390 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:52,390 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 15, 13, 13, 9, 6, 6, 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, 1, 1, 1] [2019-10-14 23:42:52,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:52,595 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:52,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:52,595 INFO L82 PathProgramCache]: Analyzing trace with hash 206641648, now seen corresponding path program 21 times [2019-10-14 23:42:52,596 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:52,596 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9507808] [2019-10-14 23:42:52,596 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:52,596 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:52,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:52,609 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:52,609 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586713086] [2019-10-14 23:42:52,610 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:56,400 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-14 23:42:56,400 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:56,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:42:56,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:56,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 426 proven. 36 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2019-10-14 23:42:56,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9507808] [2019-10-14 23:42:56,481 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:56,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586713086] [2019-10-14 23:42:56,481 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:56,481 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:42:56,481 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870905765] [2019-10-14 23:42:56,481 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:42:56,482 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:56,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:42:56,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:56,482 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand 9 states. [2019-10-14 23:42:56,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:56,523 INFO L93 Difference]: Finished difference Result 128 states and 145 transitions. [2019-10-14 23:42:56,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:42:56,523 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 147 [2019-10-14 23:42:56,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:56,524 INFO L225 Difference]: With dead ends: 128 [2019-10-14 23:42:56,525 INFO L226 Difference]: Without dead ends: 93 [2019-10-14 23:42:56,525 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:56,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-10-14 23:42:56,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2019-10-14 23:42:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-10-14 23:42:56,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2019-10-14 23:42:56,530 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 147 [2019-10-14 23:42:56,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:56,530 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2019-10-14 23:42:56,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:42:56,531 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2019-10-14 23:42:56,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-14 23:42:56,531 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:56,532 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 15, 13, 13, 9, 7, 7, 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, 1, 1, 1] [2019-10-14 23:42:56,736 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:56,736 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:56,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:56,737 INFO L82 PathProgramCache]: Analyzing trace with hash -915828082, now seen corresponding path program 22 times [2019-10-14 23:42:56,737 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:56,737 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119831613] [2019-10-14 23:42:56,738 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:56,738 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:56,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:56,750 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:56,750 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023952205] [2019-10-14 23:42:56,750 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:56,837 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:56,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:56,839 INFO L256 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:42:56,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 475 proven. 26 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2019-10-14 23:42:56,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119831613] [2019-10-14 23:42:56,877 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:56,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023952205] [2019-10-14 23:42:56,877 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:56,877 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:42:56,877 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489049683] [2019-10-14 23:42:56,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:42:56,878 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:56,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:42:56,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:56,879 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand 7 states. [2019-10-14 23:42:56,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:56,906 INFO L93 Difference]: Finished difference Result 152 states and 175 transitions. [2019-10-14 23:42:56,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:42:56,908 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 149 [2019-10-14 23:42:56,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:56,908 INFO L225 Difference]: With dead ends: 152 [2019-10-14 23:42:56,909 INFO L226 Difference]: Without dead ends: 99 [2019-10-14 23:42:56,910 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:56,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-14 23:42:56,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2019-10-14 23:42:56,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-14 23:42:56,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2019-10-14 23:42:56,915 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 149 [2019-10-14 23:42:56,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:56,916 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2019-10-14 23:42:56,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:42:56,916 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2019-10-14 23:42:56,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-10-14 23:42:56,917 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:56,917 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 15, 15, 13, 13, 7, 7, 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, 1, 1, 1] [2019-10-14 23:42:57,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:57,121 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:57,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:57,122 INFO L82 PathProgramCache]: Analyzing trace with hash 35134862, now seen corresponding path program 23 times [2019-10-14 23:42:57,122 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:57,122 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178928456] [2019-10-14 23:42:57,123 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:57,123 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:57,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:57,134 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:57,134 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815142403] [2019-10-14 23:42:57,134 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:57,191 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-14 23:42:57,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:57,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:42:57,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1628 backedges. 723 proven. 40 refuted. 0 times theorem prover too weak. 865 trivial. 0 not checked. [2019-10-14 23:42:57,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178928456] [2019-10-14 23:42:57,242 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:57,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815142403] [2019-10-14 23:42:57,243 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:57,243 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:42:57,243 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881654199] [2019-10-14 23:42:57,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:42:57,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:57,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:42:57,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:57,244 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 9 states. [2019-10-14 23:42:57,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:57,297 INFO L93 Difference]: Finished difference Result 162 states and 186 transitions. [2019-10-14 23:42:57,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:42:57,300 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 167 [2019-10-14 23:42:57,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:57,301 INFO L225 Difference]: With dead ends: 162 [2019-10-14 23:42:57,302 INFO L226 Difference]: Without dead ends: 103 [2019-10-14 23:42:57,302 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:57,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-14 23:42:57,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-10-14 23:42:57,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-14 23:42:57,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2019-10-14 23:42:57,308 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 167 [2019-10-14 23:42:57,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:57,308 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2019-10-14 23:42:57,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:42:57,309 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2019-10-14 23:42:57,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-14 23:42:57,310 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:57,310 INFO L380 BasicCegarLoop]: trace histogram [33, 33, 18, 15, 13, 13, 7, 7, 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, 1, 1, 1] [2019-10-14 23:42:57,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:57,521 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:57,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:57,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1395290612, now seen corresponding path program 24 times [2019-10-14 23:42:57,521 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:57,521 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548483718] [2019-10-14 23:42:57,522 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:57,522 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:57,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:57,534 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:57,534 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220518112] [2019-10-14 23:42:57,534 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:59,569 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-14 23:42:59,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:59,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:42:59,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1916 backedges. 780 proven. 49 refuted. 0 times theorem prover too weak. 1087 trivial. 0 not checked. [2019-10-14 23:42:59,633 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548483718] [2019-10-14 23:42:59,633 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:59,633 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220518112] [2019-10-14 23:42:59,633 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:59,633 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:42:59,634 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184468579] [2019-10-14 23:42:59,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:42:59,634 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:59,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:42:59,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:42:59,635 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand 10 states. [2019-10-14 23:42:59,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:59,667 INFO L93 Difference]: Finished difference Result 148 states and 167 transitions. [2019-10-14 23:42:59,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:42:59,668 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 176 [2019-10-14 23:42:59,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:59,669 INFO L225 Difference]: With dead ends: 148 [2019-10-14 23:42:59,670 INFO L226 Difference]: Without dead ends: 104 [2019-10-14 23:42:59,670 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:42:59,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-14 23:42:59,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2019-10-14 23:42:59,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-10-14 23:42:59,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2019-10-14 23:42:59,676 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 176 [2019-10-14 23:42:59,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:59,676 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2019-10-14 23:42:59,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:42:59,676 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2019-10-14 23:42:59,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-14 23:42:59,678 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:59,678 INFO L380 BasicCegarLoop]: trace histogram [33, 33, 18, 15, 13, 13, 8, 8, 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, 1, 1, 1] [2019-10-14 23:42:59,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:59,883 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:59,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:59,883 INFO L82 PathProgramCache]: Analyzing trace with hash -533347154, now seen corresponding path program 25 times [2019-10-14 23:42:59,883 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:59,883 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196152191] [2019-10-14 23:42:59,884 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:59,884 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:59,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:59,894 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:59,895 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938093093] [2019-10-14 23:42:59,895 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:59,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:42:59,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1931 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1762 trivial. 0 not checked. [2019-10-14 23:43:00,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196152191] [2019-10-14 23:43:00,130 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:43:00,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938093093] [2019-10-14 23:43:00,130 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:43:00,130 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-14 23:43:00,131 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165497992] [2019-10-14 23:43:00,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:43:00,131 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:00,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:43:00,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:43:00,132 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand 16 states. [2019-10-14 23:43:00,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:00,198 INFO L93 Difference]: Finished difference Result 174 states and 196 transitions. [2019-10-14 23:43:00,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:43:00,198 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 178 [2019-10-14 23:43:00,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:00,200 INFO L225 Difference]: With dead ends: 174 [2019-10-14 23:43:00,200 INFO L226 Difference]: Without dead ends: 106 [2019-10-14 23:43:00,202 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:43:00,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-14 23:43:00,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2019-10-14 23:43:00,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-14 23:43:00,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2019-10-14 23:43:00,209 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 178 [2019-10-14 23:43:00,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:00,210 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2019-10-14 23:43:00,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:43:00,210 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2019-10-14 23:43:00,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-14 23:43:00,211 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:00,211 INFO L380 BasicCegarLoop]: trace histogram [33, 33, 18, 15, 14, 14, 8, 8, 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, 1, 1, 1] [2019-10-14 23:43:00,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:00,415 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:00,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:00,415 INFO L82 PathProgramCache]: Analyzing trace with hash -116530704, now seen corresponding path program 26 times [2019-10-14 23:43:00,415 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:00,416 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393843346] [2019-10-14 23:43:00,416 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:00,416 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:00,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:00,427 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:43:00,427 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633752244] [2019-10-14 23:43:00,427 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:00,546 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:00,546 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:00,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 23:43:00,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1958 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1762 trivial. 0 not checked. [2019-10-14 23:43:00,702 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393843346] [2019-10-14 23:43:00,702 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:43:00,702 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633752244] [2019-10-14 23:43:00,702 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:43:00,702 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-10-14 23:43:00,702 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613813788] [2019-10-14 23:43:00,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 23:43:00,703 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:00,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 23:43:00,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:43:00,704 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand 17 states. [2019-10-14 23:43:00,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:00,752 INFO L93 Difference]: Finished difference Result 176 states and 198 transitions. [2019-10-14 23:43:00,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:43:00,753 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 180 [2019-10-14 23:43:00,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:00,754 INFO L225 Difference]: With dead ends: 176 [2019-10-14 23:43:00,754 INFO L226 Difference]: Without dead ends: 108 [2019-10-14 23:43:00,755 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:43:00,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-14 23:43:00,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-10-14 23:43:00,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-14 23:43:00,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2019-10-14 23:43:00,761 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 180 [2019-10-14 23:43:00,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:00,761 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2019-10-14 23:43:00,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 23:43:00,761 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2019-10-14 23:43:00,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-14 23:43:00,763 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:00,763 INFO L380 BasicCegarLoop]: trace histogram [33, 33, 18, 15, 15, 15, 8, 8, 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, 1, 1, 1] [2019-10-14 23:43:00,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:00,967 INFO L410 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:00,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:00,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1012119218, now seen corresponding path program 27 times [2019-10-14 23:43:00,968 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:00,968 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288532582] [2019-10-14 23:43:00,968 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:00,969 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:00,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:00,982 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:43:00,982 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311982246] [2019-10-14 23:43:00,982 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:01,315 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-14 23:43:01,315 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:01,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:43:01,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1987 backedges. 780 proven. 64 refuted. 0 times theorem prover too weak. 1143 trivial. 0 not checked. [2019-10-14 23:43:01,408 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288532582] [2019-10-14 23:43:01,409 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:43:01,409 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311982246] [2019-10-14 23:43:01,409 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:43:01,409 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-14 23:43:01,409 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515138510] [2019-10-14 23:43:01,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:43:01,409 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:01,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:43:01,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:43:01,410 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand 11 states. [2019-10-14 23:43:01,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:01,443 INFO L93 Difference]: Finished difference Result 154 states and 173 transitions. [2019-10-14 23:43:01,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:43:01,443 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 182 [2019-10-14 23:43:01,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:01,444 INFO L225 Difference]: With dead ends: 154 [2019-10-14 23:43:01,444 INFO L226 Difference]: Without dead ends: 110 [2019-10-14 23:43:01,445 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:43:01,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-14 23:43:01,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-10-14 23:43:01,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-14 23:43:01,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2019-10-14 23:43:01,450 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 182 [2019-10-14 23:43:01,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:01,451 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2019-10-14 23:43:01,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:43:01,451 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2019-10-14 23:43:01,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-10-14 23:43:01,452 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:01,452 INFO L380 BasicCegarLoop]: trace histogram [33, 33, 18, 15, 15, 15, 9, 9, 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, 1, 1, 1] [2019-10-14 23:43:01,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:01,657 INFO L410 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:01,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:01,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1999873068, now seen corresponding path program 28 times [2019-10-14 23:43:01,658 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:01,658 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227221452] [2019-10-14 23:43:01,658 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:01,658 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:01,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:01,673 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:43:01,674 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481264864] [2019-10-14 23:43:01,674 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:01,835 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:01,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:01,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:43:01,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 874 proven. 40 refuted. 0 times theorem prover too weak. 1090 trivial. 0 not checked. [2019-10-14 23:43:01,903 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227221452] [2019-10-14 23:43:01,903 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:43:01,904 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481264864] [2019-10-14 23:43:01,904 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:43:01,904 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:43:01,904 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073838822] [2019-10-14 23:43:01,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:43:01,905 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:01,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:43:01,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:43:01,906 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand 8 states. [2019-10-14 23:43:01,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:01,942 INFO L93 Difference]: Finished difference Result 179 states and 203 transitions. [2019-10-14 23:43:01,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:43:01,945 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 184 [2019-10-14 23:43:01,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:01,946 INFO L225 Difference]: With dead ends: 179 [2019-10-14 23:43:01,946 INFO L226 Difference]: Without dead ends: 113 [2019-10-14 23:43:01,949 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:43:01,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-10-14 23:43:01,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2019-10-14 23:43:01,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-14 23:43:01,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2019-10-14 23:43:01,959 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 123 transitions. Word has length 184 [2019-10-14 23:43:01,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:01,959 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 123 transitions. [2019-10-14 23:43:01,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:43:01,959 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 123 transitions. [2019-10-14 23:43:01,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-10-14 23:43:01,960 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:01,961 INFO L380 BasicCegarLoop]: trace histogram [36, 36, 18, 18, 15, 15, 9, 9, 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, 1, 1, 1] [2019-10-14 23:43:02,165 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:02,165 INFO L410 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:02,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:02,165 INFO L82 PathProgramCache]: Analyzing trace with hash 627078216, now seen corresponding path program 29 times [2019-10-14 23:43:02,165 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:02,165 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521126528] [2019-10-14 23:43:02,166 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:02,166 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:02,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:02,177 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:43:02,177 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744666134] [2019-10-14 23:43:02,177 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:02,252 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-10-14 23:43:02,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:02,253 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:43:02,256 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2319 backedges. 1029 proven. 57 refuted. 0 times theorem prover too weak. 1233 trivial. 0 not checked. [2019-10-14 23:43:02,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521126528] [2019-10-14 23:43:02,322 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:43:02,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744666134] [2019-10-14 23:43:02,322 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:43:02,322 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:43:02,322 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162150157] [2019-10-14 23:43:02,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:43:02,323 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:02,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:43:02,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:43:02,323 INFO L87 Difference]: Start difference. First operand 112 states and 123 transitions. Second operand 10 states. [2019-10-14 23:43:02,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:02,378 INFO L93 Difference]: Finished difference Result 186 states and 212 transitions. [2019-10-14 23:43:02,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:43:02,380 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 193 [2019-10-14 23:43:02,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:02,381 INFO L225 Difference]: With dead ends: 186 [2019-10-14 23:43:02,381 INFO L226 Difference]: Without dead ends: 117 [2019-10-14 23:43:02,382 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:43:02,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-14 23:43:02,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2019-10-14 23:43:02,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-10-14 23:43:02,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2019-10-14 23:43:02,387 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 193 [2019-10-14 23:43:02,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:02,388 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2019-10-14 23:43:02,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:43:02,388 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2019-10-14 23:43:02,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-14 23:43:02,389 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:02,389 INFO L380 BasicCegarLoop]: trace histogram [39, 39, 21, 18, 15, 15, 9, 9, 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, 1, 1, 1] [2019-10-14 23:43:02,592 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:02,593 INFO L410 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:02,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:02,593 INFO L82 PathProgramCache]: Analyzing trace with hash -96230834, now seen corresponding path program 30 times [2019-10-14 23:43:02,593 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:02,593 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709569570] [2019-10-14 23:43:02,593 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:02,594 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:02,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:02,606 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:43:02,606 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794779628] [2019-10-14 23:43:02,606 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true