java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-multidimensional/copy-partial-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:48:03,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:48:03,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:48:03,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:48:03,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:48:03,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:48:03,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:48:03,377 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:48:03,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:48:03,379 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:48:03,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:48:03,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:48:03,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:48:03,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:48:03,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:48:03,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:48:03,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:48:03,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:48:03,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:48:03,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:48:03,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:48:03,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:48:03,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:48:03,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:48:03,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:48:03,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:48:03,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:48:03,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:48:03,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:48:03,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:48:03,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:48:03,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:48:03,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:48:03,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:48:03,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:48:03,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:48:03,408 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 21:48:03,425 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:48:03,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:48:03,428 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:48:03,429 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:48:03,429 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:48:03,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:48:03,430 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:48:03,430 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:48:03,430 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:48:03,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:48:03,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:48:03,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:48:03,431 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:48:03,431 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:48:03,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:48:03,432 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:48:03,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:48:03,433 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:48:03,433 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:48:03,433 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:48:03,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:48:03,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:48:03,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:48:03,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:48:03,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:48:03,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:48:03,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:48:03,435 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:48:03,435 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:48:03,723 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:48:03,736 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:48:03,740 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:48:03,741 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:48:03,742 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:48:03,743 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/copy-partial-3-u.c [2019-10-14 21:48:03,820 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afc3e64fb/85329f22de16477696969b0c8a6ae708/FLAG7c8be3f3e [2019-10-14 21:48:04,301 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:48:04,302 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/copy-partial-3-u.c [2019-10-14 21:48:04,309 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afc3e64fb/85329f22de16477696969b0c8a6ae708/FLAG7c8be3f3e [2019-10-14 21:48:04,666 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afc3e64fb/85329f22de16477696969b0c8a6ae708 [2019-10-14 21:48:04,675 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:48:04,676 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:48:04,678 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:48:04,678 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:48:04,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:48:04,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:48:04" (1/1) ... [2019-10-14 21:48:04,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cc80f98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:04, skipping insertion in model container [2019-10-14 21:48:04,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:48:04" (1/1) ... [2019-10-14 21:48:04,693 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:48:04,714 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:48:04,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:48:04,968 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:48:05,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:48:05,112 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:48:05,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:05 WrapperNode [2019-10-14 21:48:05,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:48:05,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:48:05,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:48:05,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:48:05,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:05" (1/1) ... [2019-10-14 21:48:05,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:05" (1/1) ... [2019-10-14 21:48:05,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:05" (1/1) ... [2019-10-14 21:48:05,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:05" (1/1) ... [2019-10-14 21:48:05,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:05" (1/1) ... [2019-10-14 21:48:05,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:05" (1/1) ... [2019-10-14 21:48:05,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:05" (1/1) ... [2019-10-14 21:48:05,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:48:05,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:48:05,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:48:05,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:48:05,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:05" (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 21:48:05,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:48:05,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:48:05,224 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:48:05,225 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:48:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:48:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 21:48:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:48:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:48:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:48:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:48:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:48:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:48:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:48:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:48:05,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:48:05,598 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:48:05,599 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-10-14 21:48:05,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:48:05 BoogieIcfgContainer [2019-10-14 21:48:05,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:48:05,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:48:05,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:48:05,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:48:05,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:48:04" (1/3) ... [2019-10-14 21:48:05,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@614f27ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:48:05, skipping insertion in model container [2019-10-14 21:48:05,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:05" (2/3) ... [2019-10-14 21:48:05,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@614f27ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:48:05, skipping insertion in model container [2019-10-14 21:48:05,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:48:05" (3/3) ... [2019-10-14 21:48:05,609 INFO L109 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.c [2019-10-14 21:48:05,619 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:48:05,628 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:48:05,638 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:48:05,663 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:48:05,663 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:48:05,663 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:48:05,663 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:48:05,663 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:48:05,663 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:48:05,664 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:48:05,664 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:48:05,678 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2019-10-14 21:48:05,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:48:05,684 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:05,684 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:05,686 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:05,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:05,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1174671461, now seen corresponding path program 1 times [2019-10-14 21:48:05,697 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:05,697 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235936907] [2019-10-14 21:48:05,698 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:05,698 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:05,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:05,773 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:05,774 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091548017] [2019-10-14 21:48:05,774 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 21:48:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:05,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-14 21:48:05,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:05,869 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235936907] [2019-10-14 21:48:05,869 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:05,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091548017] [2019-10-14 21:48:05,870 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:05,871 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 21:48:05,871 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877246299] [2019-10-14 21:48:05,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 21:48:05,876 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:05,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 21:48:05,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 21:48:05,894 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 2 states. [2019-10-14 21:48:05,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:05,924 INFO L93 Difference]: Finished difference Result 78 states and 127 transitions. [2019-10-14 21:48:05,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 21:48:05,926 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2019-10-14 21:48:05,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:05,935 INFO L225 Difference]: With dead ends: 78 [2019-10-14 21:48:05,935 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 21:48:05,939 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 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 21:48:05,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 21:48:05,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-14 21:48:05,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 21:48:05,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2019-10-14 21:48:05,983 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 19 [2019-10-14 21:48:05,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:05,984 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-10-14 21:48:05,984 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 21:48:05,985 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2019-10-14 21:48:05,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:48:05,986 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:05,986 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:06,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:06,191 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:06,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:06,192 INFO L82 PathProgramCache]: Analyzing trace with hash 2144819339, now seen corresponding path program 1 times [2019-10-14 21:48:06,193 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:06,194 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625958617] [2019-10-14 21:48:06,194 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:06,194 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:06,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:06,207 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:06,207 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1382720892] [2019-10-14 21:48:06,208 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 21:48:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:06,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:06,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:06,332 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625958617] [2019-10-14 21:48:06,332 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:06,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382720892] [2019-10-14 21:48:06,333 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:06,333 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:48:06,333 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034403241] [2019-10-14 21:48:06,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:48:06,335 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:06,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:48:06,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:48:06,336 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 3 states. [2019-10-14 21:48:06,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:06,422 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2019-10-14 21:48:06,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:48:06,423 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-10-14 21:48:06,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:06,424 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:48:06,425 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 21:48:06,426 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 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 21:48:06,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 21:48:06,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2019-10-14 21:48:06,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 21:48:06,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2019-10-14 21:48:06,434 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 19 [2019-10-14 21:48:06,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:06,434 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2019-10-14 21:48:06,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:48:06,435 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2019-10-14 21:48:06,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:48:06,436 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:06,436 INFO L380 BasicCegarLoop]: trace histogram [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 21:48:06,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:06,649 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:06,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:06,650 INFO L82 PathProgramCache]: Analyzing trace with hash 698119250, now seen corresponding path program 1 times [2019-10-14 21:48:06,650 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:06,650 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070430830] [2019-10-14 21:48:06,650 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:06,651 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:06,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:06,659 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:06,660 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926101183] [2019-10-14 21:48:06,660 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 21:48:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:06,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:06,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:06,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070430830] [2019-10-14 21:48:06,753 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:06,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926101183] [2019-10-14 21:48:06,754 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:06,754 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:06,754 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203920019] [2019-10-14 21:48:06,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:06,755 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:06,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:06,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:06,757 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand 4 states. [2019-10-14 21:48:06,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:06,908 INFO L93 Difference]: Finished difference Result 86 states and 117 transitions. [2019-10-14 21:48:06,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:06,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-10-14 21:48:06,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:06,911 INFO L225 Difference]: With dead ends: 86 [2019-10-14 21:48:06,912 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 21:48:06,912 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 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 21:48:06,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 21:48:06,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2019-10-14 21:48:06,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:48:06,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2019-10-14 21:48:06,925 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 22 [2019-10-14 21:48:06,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:06,926 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2019-10-14 21:48:06,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:06,926 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2019-10-14 21:48:06,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:48:06,927 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:06,927 INFO L380 BasicCegarLoop]: trace histogram [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 21:48:07,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:07,131 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:07,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:07,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1063393417, now seen corresponding path program 1 times [2019-10-14 21:48:07,132 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:07,145 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450480122] [2019-10-14 21:48:07,145 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:07,146 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:07,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:07,159 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:07,160 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171745370] [2019-10-14 21:48:07,160 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 21:48:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:07,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:07,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:07,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450480122] [2019-10-14 21:48:07,253 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:07,253 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171745370] [2019-10-14 21:48:07,253 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:07,253 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:07,254 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899635292] [2019-10-14 21:48:07,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:07,254 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:07,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:07,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:07,255 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 4 states. [2019-10-14 21:48:07,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:07,361 INFO L93 Difference]: Finished difference Result 88 states and 118 transitions. [2019-10-14 21:48:07,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:07,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-10-14 21:48:07,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:07,363 INFO L225 Difference]: With dead ends: 88 [2019-10-14 21:48:07,363 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 21:48:07,365 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 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 21:48:07,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 21:48:07,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2019-10-14 21:48:07,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 21:48:07,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2019-10-14 21:48:07,381 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 25 [2019-10-14 21:48:07,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:07,381 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2019-10-14 21:48:07,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:07,381 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2019-10-14 21:48:07,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 21:48:07,384 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:07,385 INFO L380 BasicCegarLoop]: trace histogram [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 21:48:07,595 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:07,596 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:07,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:07,597 INFO L82 PathProgramCache]: Analyzing trace with hash 622834947, now seen corresponding path program 1 times [2019-10-14 21:48:07,597 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:07,598 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856536567] [2019-10-14 21:48:07,598 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:07,598 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:07,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:07,608 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:07,609 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30088642] [2019-10-14 21:48:07,609 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 21:48:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:07,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:07,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:07,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856536567] [2019-10-14 21:48:07,703 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:07,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30088642] [2019-10-14 21:48:07,703 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:07,704 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 21:48:07,704 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115358863] [2019-10-14 21:48:07,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:48:07,704 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:07,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:48:07,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:07,705 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 5 states. [2019-10-14 21:48:07,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:07,876 INFO L93 Difference]: Finished difference Result 104 states and 140 transitions. [2019-10-14 21:48:07,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:48:07,878 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2019-10-14 21:48:07,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:07,880 INFO L225 Difference]: With dead ends: 104 [2019-10-14 21:48:07,880 INFO L226 Difference]: Without dead ends: 69 [2019-10-14 21:48:07,881 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 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 21:48:07,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-14 21:48:07,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 46. [2019-10-14 21:48:07,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:48:07,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2019-10-14 21:48:07,903 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 26 [2019-10-14 21:48:07,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:07,903 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2019-10-14 21:48:07,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:48:07,911 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2019-10-14 21:48:07,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:48:07,912 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:07,912 INFO L380 BasicCegarLoop]: trace histogram [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 21:48:08,126 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:08,127 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:08,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:08,128 INFO L82 PathProgramCache]: Analyzing trace with hash -149575735, now seen corresponding path program 2 times [2019-10-14 21:48:08,128 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:08,129 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610979444] [2019-10-14 21:48:08,129 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:08,129 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:08,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:08,137 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:08,137 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1662181500] [2019-10-14 21:48:08,137 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:08,184 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 21:48:08,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:08,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:08,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:48:08,212 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610979444] [2019-10-14 21:48:08,212 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:08,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662181500] [2019-10-14 21:48:08,213 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:08,213 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:08,213 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316364008] [2019-10-14 21:48:08,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:08,214 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:08,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:08,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:08,215 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 4 states. [2019-10-14 21:48:08,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:08,298 INFO L93 Difference]: Finished difference Result 95 states and 122 transitions. [2019-10-14 21:48:08,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:08,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-10-14 21:48:08,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:08,300 INFO L225 Difference]: With dead ends: 95 [2019-10-14 21:48:08,301 INFO L226 Difference]: Without dead ends: 70 [2019-10-14 21:48:08,301 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 24 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 21:48:08,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-14 21:48:08,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 47. [2019-10-14 21:48:08,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 21:48:08,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2019-10-14 21:48:08,311 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 27 [2019-10-14 21:48:08,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:08,311 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2019-10-14 21:48:08,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:08,311 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2019-10-14 21:48:08,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:48:08,313 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:08,313 INFO L380 BasicCegarLoop]: trace histogram [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, 1] [2019-10-14 21:48:08,516 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:08,516 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:08,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:08,517 INFO L82 PathProgramCache]: Analyzing trace with hash 861197741, now seen corresponding path program 1 times [2019-10-14 21:48:08,517 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:08,517 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465260140] [2019-10-14 21:48:08,517 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:08,517 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:08,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:08,527 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:08,528 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544857799] [2019-10-14 21:48:08,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:08,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:48:08,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:48:08,622 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465260140] [2019-10-14 21:48:08,622 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:08,622 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544857799] [2019-10-14 21:48:08,623 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:08,623 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 21:48:08,623 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869785204] [2019-10-14 21:48:08,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:48:08,624 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:08,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:48:08,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:48:08,625 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand 6 states. [2019-10-14 21:48:08,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:08,785 INFO L93 Difference]: Finished difference Result 124 states and 167 transitions. [2019-10-14 21:48:08,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:48:08,786 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-10-14 21:48:08,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:08,787 INFO L225 Difference]: With dead ends: 124 [2019-10-14 21:48:08,787 INFO L226 Difference]: Without dead ends: 84 [2019-10-14 21:48:08,788 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:48:08,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-14 21:48:08,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 51. [2019-10-14 21:48:08,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:48:08,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2019-10-14 21:48:08,799 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 30 [2019-10-14 21:48:08,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:08,799 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2019-10-14 21:48:08,799 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:48:08,800 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2019-10-14 21:48:08,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:48:08,801 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:08,801 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:48:09,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:09,009 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:09,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:09,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1609037171, now seen corresponding path program 2 times [2019-10-14 21:48:09,011 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:09,011 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824206526] [2019-10-14 21:48:09,012 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:09,012 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:09,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:09,019 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:09,019 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1309743892] [2019-10-14 21:48:09,019 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:09,057 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 21:48:09,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:09,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:09,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:48:09,110 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824206526] [2019-10-14 21:48:09,111 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:09,111 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309743892] [2019-10-14 21:48:09,111 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:09,111 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:09,111 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392097217] [2019-10-14 21:48:09,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:09,112 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:09,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:09,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:09,113 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 4 states. [2019-10-14 21:48:09,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:09,229 INFO L93 Difference]: Finished difference Result 101 states and 128 transitions. [2019-10-14 21:48:09,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:09,229 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2019-10-14 21:48:09,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:09,230 INFO L225 Difference]: With dead ends: 101 [2019-10-14 21:48:09,231 INFO L226 Difference]: Without dead ends: 79 [2019-10-14 21:48:09,231 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:09,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-14 21:48:09,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 52. [2019-10-14 21:48:09,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 21:48:09,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2019-10-14 21:48:09,241 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 31 [2019-10-14 21:48:09,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:09,242 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2019-10-14 21:48:09,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:09,242 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2019-10-14 21:48:09,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 21:48:09,243 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:09,243 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1] [2019-10-14 21:48:09,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:09,446 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:09,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:09,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1014230180, now seen corresponding path program 1 times [2019-10-14 21:48:09,447 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:09,448 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754760107] [2019-10-14 21:48:09,448 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:09,448 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:09,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:09,459 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:09,459 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361221966] [2019-10-14 21:48:09,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:09,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:48:09,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:48:09,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754760107] [2019-10-14 21:48:09,546 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:09,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361221966] [2019-10-14 21:48:09,547 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:09,547 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 21:48:09,547 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163141568] [2019-10-14 21:48:09,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:48:09,548 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:09,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:48:09,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:48:09,549 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 7 states. [2019-10-14 21:48:09,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:09,690 INFO L93 Difference]: Finished difference Result 148 states and 198 transitions. [2019-10-14 21:48:09,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:48:09,690 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2019-10-14 21:48:09,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:09,692 INFO L225 Difference]: With dead ends: 148 [2019-10-14 21:48:09,692 INFO L226 Difference]: Without dead ends: 103 [2019-10-14 21:48:09,693 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:48:09,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-14 21:48:09,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 56. [2019-10-14 21:48:09,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-14 21:48:09,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2019-10-14 21:48:09,711 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 34 [2019-10-14 21:48:09,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:09,711 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2019-10-14 21:48:09,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:48:09,712 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2019-10-14 21:48:09,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 21:48:09,713 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:09,713 INFO L380 BasicCegarLoop]: trace histogram [4, 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, 1, 1] [2019-10-14 21:48:09,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:09,917 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:09,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:09,917 INFO L82 PathProgramCache]: Analyzing trace with hash 777904162, now seen corresponding path program 2 times [2019-10-14 21:48:09,917 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:09,917 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225038968] [2019-10-14 21:48:09,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:09,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:09,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:09,923 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:09,923 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001616107] [2019-10-14 21:48:09,923 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:09,966 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:48:09,966 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:09,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:48:09,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:48:10,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225038968] [2019-10-14 21:48:10,029 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:10,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001616107] [2019-10-14 21:48:10,029 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:10,030 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 21:48:10,030 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585919141] [2019-10-14 21:48:10,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:48:10,032 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:10,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:48:10,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:48:10,032 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 8 states. [2019-10-14 21:48:10,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:10,225 INFO L93 Difference]: Finished difference Result 167 states and 224 transitions. [2019-10-14 21:48:10,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:48:10,226 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2019-10-14 21:48:10,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:10,228 INFO L225 Difference]: With dead ends: 167 [2019-10-14 21:48:10,228 INFO L226 Difference]: Without dead ends: 118 [2019-10-14 21:48:10,229 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 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 21:48:10,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-10-14 21:48:10,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 60. [2019-10-14 21:48:10,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-14 21:48:10,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2019-10-14 21:48:10,240 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 35 [2019-10-14 21:48:10,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:10,240 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2019-10-14 21:48:10,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:48:10,240 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2019-10-14 21:48:10,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 21:48:10,241 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:10,241 INFO L380 BasicCegarLoop]: trace histogram [5, 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, 1, 1] [2019-10-14 21:48:10,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:10,455 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:10,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:10,456 INFO L82 PathProgramCache]: Analyzing trace with hash 499493916, now seen corresponding path program 3 times [2019-10-14 21:48:10,456 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:10,456 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167827017] [2019-10-14 21:48:10,456 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:10,457 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:10,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:10,463 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:10,463 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212005540] [2019-10-14 21:48:10,463 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:10,502 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:48:10,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:10,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:10,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-14 21:48:10,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167827017] [2019-10-14 21:48:10,535 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:10,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212005540] [2019-10-14 21:48:10,535 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:10,535 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-14 21:48:10,536 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768239610] [2019-10-14 21:48:10,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:10,536 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:10,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:10,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:10,537 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand 4 states. [2019-10-14 21:48:10,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:10,618 INFO L93 Difference]: Finished difference Result 123 states and 155 transitions. [2019-10-14 21:48:10,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:10,618 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2019-10-14 21:48:10,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:10,619 INFO L225 Difference]: With dead ends: 123 [2019-10-14 21:48:10,620 INFO L226 Difference]: Without dead ends: 81 [2019-10-14 21:48:10,620 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 33 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 21:48:10,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-14 21:48:10,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2019-10-14 21:48:10,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 21:48:10,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2019-10-14 21:48:10,631 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 36 [2019-10-14 21:48:10,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:10,631 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2019-10-14 21:48:10,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:10,631 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2019-10-14 21:48:10,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 21:48:10,632 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:10,632 INFO L380 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:10,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:10,836 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:10,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:10,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1562608348, now seen corresponding path program 4 times [2019-10-14 21:48:10,837 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:10,837 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908427988] [2019-10-14 21:48:10,838 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:10,838 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:10,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:10,845 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:10,845 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828723620] [2019-10-14 21:48:10,845 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:10,883 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:48:10,883 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:10,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:10,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-14 21:48:10,902 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908427988] [2019-10-14 21:48:10,902 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:10,902 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828723620] [2019-10-14 21:48:10,902 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:10,902 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:10,902 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497720711] [2019-10-14 21:48:10,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:10,903 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:10,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:10,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:10,903 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand 4 states. [2019-10-14 21:48:11,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:11,005 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2019-10-14 21:48:11,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:11,006 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2019-10-14 21:48:11,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:11,007 INFO L225 Difference]: With dead ends: 121 [2019-10-14 21:48:11,007 INFO L226 Difference]: Without dead ends: 81 [2019-10-14 21:48:11,008 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:11,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-14 21:48:11,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2019-10-14 21:48:11,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-14 21:48:11,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2019-10-14 21:48:11,018 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 47 [2019-10-14 21:48:11,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:11,018 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2019-10-14 21:48:11,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:11,019 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2019-10-14 21:48:11,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 21:48:11,019 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:11,020 INFO L380 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:11,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:11,224 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:11,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:11,224 INFO L82 PathProgramCache]: Analyzing trace with hash 496392870, now seen corresponding path program 1 times [2019-10-14 21:48:11,224 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:11,224 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901467879] [2019-10-14 21:48:11,224 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:11,225 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:11,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:11,229 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:11,230 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464574564] [2019-10-14 21:48:11,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:48:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:11,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:48:11,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 41 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:48:11,350 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901467879] [2019-10-14 21:48:11,350 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:11,351 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464574564] [2019-10-14 21:48:11,351 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:11,351 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 21:48:11,351 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076239993] [2019-10-14 21:48:11,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:48:11,352 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:11,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:48:11,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:48:11,352 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand 9 states. [2019-10-14 21:48:11,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:11,576 INFO L93 Difference]: Finished difference Result 210 states and 279 transitions. [2019-10-14 21:48:11,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:48:11,576 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2019-10-14 21:48:11,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:11,577 INFO L225 Difference]: With dead ends: 210 [2019-10-14 21:48:11,577 INFO L226 Difference]: Without dead ends: 146 [2019-10-14 21:48:11,578 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 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 21:48:11,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-10-14 21:48:11,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 77. [2019-10-14 21:48:11,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 21:48:11,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2019-10-14 21:48:11,591 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 50 [2019-10-14 21:48:11,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:11,591 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2019-10-14 21:48:11,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:48:11,592 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2019-10-14 21:48:11,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 21:48:11,595 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:11,595 INFO L380 BasicCegarLoop]: trace histogram [12, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:11,798 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:11,799 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:11,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:11,799 INFO L82 PathProgramCache]: Analyzing trace with hash -943715158, now seen corresponding path program 2 times [2019-10-14 21:48:11,799 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:11,799 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172731243] [2019-10-14 21:48:11,799 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:11,800 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:11,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:11,805 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:11,805 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369077578] [2019-10-14 21:48:11,806 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 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 21:48:11,851 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:48:11,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:11,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:48:11,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 54 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-14 21:48:11,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172731243] [2019-10-14 21:48:11,947 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:11,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369077578] [2019-10-14 21:48:11,948 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:11,948 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 21:48:11,948 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722665139] [2019-10-14 21:48:11,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:48:11,949 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:11,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:48:11,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:48:11,950 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand 10 states. [2019-10-14 21:48:12,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:12,159 INFO L93 Difference]: Finished difference Result 231 states and 307 transitions. [2019-10-14 21:48:12,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:48:12,160 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2019-10-14 21:48:12,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:12,161 INFO L225 Difference]: With dead ends: 231 [2019-10-14 21:48:12,161 INFO L226 Difference]: Without dead ends: 162 [2019-10-14 21:48:12,162 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 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 21:48:12,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-10-14 21:48:12,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 82. [2019-10-14 21:48:12,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-14 21:48:12,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2019-10-14 21:48:12,174 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 52 [2019-10-14 21:48:12,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:12,175 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2019-10-14 21:48:12,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:48:12,175 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2019-10-14 21:48:12,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 21:48:12,176 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:12,176 INFO L380 BasicCegarLoop]: trace histogram [14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:12,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:12,380 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:12,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:12,380 INFO L82 PathProgramCache]: Analyzing trace with hash 537298086, now seen corresponding path program 3 times [2019-10-14 21:48:12,380 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:12,380 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78452301] [2019-10-14 21:48:12,381 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:12,381 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:12,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:12,387 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:12,387 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375444439] [2019-10-14 21:48:12,387 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 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 21:48:12,428 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:48:12,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:12,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:12,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2019-10-14 21:48:12,465 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78452301] [2019-10-14 21:48:12,465 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:12,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375444439] [2019-10-14 21:48:12,466 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:12,466 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 21:48:12,466 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135399200] [2019-10-14 21:48:12,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:48:12,467 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:12,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:48:12,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:12,467 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand 5 states. [2019-10-14 21:48:12,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:12,564 INFO L93 Difference]: Finished difference Result 200 states and 255 transitions. [2019-10-14 21:48:12,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:48:12,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2019-10-14 21:48:12,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:12,567 INFO L225 Difference]: With dead ends: 200 [2019-10-14 21:48:12,567 INFO L226 Difference]: Without dead ends: 159 [2019-10-14 21:48:12,567 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 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 21:48:12,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-10-14 21:48:12,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 88. [2019-10-14 21:48:12,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-10-14 21:48:12,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2019-10-14 21:48:12,581 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 54 [2019-10-14 21:48:12,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:12,581 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2019-10-14 21:48:12,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:48:12,582 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2019-10-14 21:48:12,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-14 21:48:12,582 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:12,583 INFO L380 BasicCegarLoop]: trace histogram [14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:12,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:12,794 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:12,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:12,794 INFO L82 PathProgramCache]: Analyzing trace with hash 136776072, now seen corresponding path program 4 times [2019-10-14 21:48:12,795 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:12,795 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424429336] [2019-10-14 21:48:12,795 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:12,795 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:12,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:12,802 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:12,802 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89235167] [2019-10-14 21:48:12,802 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 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 21:48:12,842 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:48:12,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:12,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:12,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:12,874 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-10-14 21:48:12,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424429336] [2019-10-14 21:48:12,874 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:12,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89235167] [2019-10-14 21:48:12,875 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:12,875 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 21:48:12,875 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637211552] [2019-10-14 21:48:12,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:48:12,876 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:12,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:48:12,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:12,877 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 5 states. [2019-10-14 21:48:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:12,987 INFO L93 Difference]: Finished difference Result 143 states and 182 transitions. [2019-10-14 21:48:12,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:12,988 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2019-10-14 21:48:12,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:12,990 INFO L225 Difference]: With dead ends: 143 [2019-10-14 21:48:12,990 INFO L226 Difference]: Without dead ends: 91 [2019-10-14 21:48:12,991 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:48:12,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-14 21:48:13,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2019-10-14 21:48:13,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-14 21:48:13,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 111 transitions. [2019-10-14 21:48:13,008 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 111 transitions. Word has length 60 [2019-10-14 21:48:13,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:13,009 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 111 transitions. [2019-10-14 21:48:13,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:48:13,009 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 111 transitions. [2019-10-14 21:48:13,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-14 21:48:13,010 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:13,010 INFO L380 BasicCegarLoop]: trace histogram [14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:13,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:13,214 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:13,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:13,214 INFO L82 PathProgramCache]: Analyzing trace with hash 618282852, now seen corresponding path program 1 times [2019-10-14 21:48:13,216 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:13,216 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081033536] [2019-10-14 21:48:13,216 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:13,216 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:13,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:13,223 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:13,224 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350863216] [2019-10-14 21:48:13,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:48:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:13,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:48:13,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 69 proven. 28 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-10-14 21:48:13,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081033536] [2019-10-14 21:48:13,407 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:13,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350863216] [2019-10-14 21:48:13,407 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:13,408 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-14 21:48:13,408 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942072417] [2019-10-14 21:48:13,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:48:13,408 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:13,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:48:13,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:48:13,409 INFO L87 Difference]: Start difference. First operand 90 states and 111 transitions. Second operand 11 states. [2019-10-14 21:48:13,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:13,681 INFO L93 Difference]: Finished difference Result 292 states and 388 transitions. [2019-10-14 21:48:13,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:48:13,681 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2019-10-14 21:48:13,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:13,683 INFO L225 Difference]: With dead ends: 292 [2019-10-14 21:48:13,683 INFO L226 Difference]: Without dead ends: 210 [2019-10-14 21:48:13,684 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:48:13,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-10-14 21:48:13,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 95. [2019-10-14 21:48:13,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-14 21:48:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2019-10-14 21:48:13,703 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 62 [2019-10-14 21:48:13,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:13,703 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2019-10-14 21:48:13,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:48:13,704 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2019-10-14 21:48:13,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-14 21:48:13,704 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:13,704 INFO L380 BasicCegarLoop]: trace histogram [16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:13,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:13,908 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:13,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:13,909 INFO L82 PathProgramCache]: Analyzing trace with hash 976817256, now seen corresponding path program 2 times [2019-10-14 21:48:13,909 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:13,909 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725560648] [2019-10-14 21:48:13,909 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:13,909 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:13,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:13,915 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:13,915 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407166397] [2019-10-14 21:48:13,915 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 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 21:48:13,976 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:48:13,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:13,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:48:13,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 86 proven. 36 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 21:48:14,092 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725560648] [2019-10-14 21:48:14,092 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:14,092 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407166397] [2019-10-14 21:48:14,092 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:14,092 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-14 21:48:14,092 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479544218] [2019-10-14 21:48:14,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:48:14,093 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:14,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:48:14,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:48:14,094 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand 12 states. [2019-10-14 21:48:14,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:14,394 INFO L93 Difference]: Finished difference Result 318 states and 423 transitions. [2019-10-14 21:48:14,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:48:14,394 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 64 [2019-10-14 21:48:14,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:14,396 INFO L225 Difference]: With dead ends: 318 [2019-10-14 21:48:14,396 INFO L226 Difference]: Without dead ends: 231 [2019-10-14 21:48:14,397 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:48:14,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-10-14 21:48:14,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 100. [2019-10-14 21:48:14,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-10-14 21:48:14,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2019-10-14 21:48:14,414 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 64 [2019-10-14 21:48:14,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:14,414 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2019-10-14 21:48:14,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:48:14,415 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2019-10-14 21:48:14,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 21:48:14,415 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:14,416 INFO L380 BasicCegarLoop]: trace histogram [18, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:14,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:14,620 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:14,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:14,621 INFO L82 PathProgramCache]: Analyzing trace with hash 47941988, now seen corresponding path program 3 times [2019-10-14 21:48:14,621 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:14,621 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120661123] [2019-10-14 21:48:14,621 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:14,621 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:14,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:14,627 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:14,628 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160149513] [2019-10-14 21:48:14,628 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 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 21:48:14,700 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:48:14,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:14,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:14,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:14,741 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2019-10-14 21:48:14,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120661123] [2019-10-14 21:48:14,742 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:14,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160149513] [2019-10-14 21:48:14,742 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:14,742 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:14,742 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337094961] [2019-10-14 21:48:14,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:14,746 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:14,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:14,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:14,746 INFO L87 Difference]: Start difference. First operand 100 states and 123 transitions. Second operand 4 states. [2019-10-14 21:48:14,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:14,846 INFO L93 Difference]: Finished difference Result 200 states and 250 transitions. [2019-10-14 21:48:14,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:14,847 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2019-10-14 21:48:14,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:14,848 INFO L225 Difference]: With dead ends: 200 [2019-10-14 21:48:14,849 INFO L226 Difference]: Without dead ends: 155 [2019-10-14 21:48:14,849 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:14,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-10-14 21:48:14,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 101. [2019-10-14 21:48:14,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-14 21:48:14,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2019-10-14 21:48:14,867 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 66 [2019-10-14 21:48:14,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:14,868 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2019-10-14 21:48:14,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:14,868 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2019-10-14 21:48:14,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-14 21:48:14,869 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:14,870 INFO L380 BasicCegarLoop]: trace histogram [18, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:15,082 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:15,082 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:15,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:15,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1227180503, now seen corresponding path program 1 times [2019-10-14 21:48:15,082 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:15,083 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342476934] [2019-10-14 21:48:15,083 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:15,083 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:15,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:15,093 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:15,093 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [235925986] [2019-10-14 21:48:15,093 INFO L94 rtionOrderModulation]: Keeping assertion order 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 21:48:15,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:15,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:48:15,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 105 proven. 45 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 21:48:15,301 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342476934] [2019-10-14 21:48:15,301 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:15,301 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235925986] [2019-10-14 21:48:15,302 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:15,302 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-14 21:48:15,302 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202723791] [2019-10-14 21:48:15,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:48:15,303 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:15,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:48:15,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:48:15,303 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand 13 states. [2019-10-14 21:48:15,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:15,609 INFO L93 Difference]: Finished difference Result 319 states and 415 transitions. [2019-10-14 21:48:15,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:48:15,610 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2019-10-14 21:48:15,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:15,612 INFO L225 Difference]: With dead ends: 319 [2019-10-14 21:48:15,612 INFO L226 Difference]: Without dead ends: 226 [2019-10-14 21:48:15,613 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:48:15,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-10-14 21:48:15,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 106. [2019-10-14 21:48:15,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-14 21:48:15,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2019-10-14 21:48:15,628 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 69 [2019-10-14 21:48:15,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:15,629 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2019-10-14 21:48:15,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:48:15,629 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2019-10-14 21:48:15,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-14 21:48:15,630 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:15,630 INFO L380 BasicCegarLoop]: trace histogram [20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:15,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:15,839 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:15,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:15,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1956340827, now seen corresponding path program 2 times [2019-10-14 21:48:15,840 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:15,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155786969] [2019-10-14 21:48:15,841 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:15,841 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:15,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:15,847 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:15,848 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216094109] [2019-10-14 21:48:15,848 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 21:48:15,908 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:48:15,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:15,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:48:15,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 126 proven. 55 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-14 21:48:16,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155786969] [2019-10-14 21:48:16,091 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:16,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216094109] [2019-10-14 21:48:16,092 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:16,092 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-14 21:48:16,092 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371799717] [2019-10-14 21:48:16,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:48:16,093 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:16,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:48:16,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:48:16,093 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand 14 states. [2019-10-14 21:48:16,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:16,454 INFO L93 Difference]: Finished difference Result 342 states and 445 transitions. [2019-10-14 21:48:16,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:48:16,455 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2019-10-14 21:48:16,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:16,457 INFO L225 Difference]: With dead ends: 342 [2019-10-14 21:48:16,457 INFO L226 Difference]: Without dead ends: 244 [2019-10-14 21:48:16,458 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:48:16,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-10-14 21:48:16,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 111. [2019-10-14 21:48:16,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-14 21:48:16,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 136 transitions. [2019-10-14 21:48:16,485 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 136 transitions. Word has length 71 [2019-10-14 21:48:16,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:16,486 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 136 transitions. [2019-10-14 21:48:16,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:48:16,486 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 136 transitions. [2019-10-14 21:48:16,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-14 21:48:16,487 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:16,488 INFO L380 BasicCegarLoop]: trace histogram [22, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:16,693 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:16,693 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:16,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:16,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1128664105, now seen corresponding path program 3 times [2019-10-14 21:48:16,694 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:16,694 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104901674] [2019-10-14 21:48:16,694 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:16,695 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:16,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:16,701 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:16,701 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016305712] [2019-10-14 21:48:16,701 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 21:48:16,750 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:48:16,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:16,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:48:16,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2019-10-14 21:48:16,788 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104901674] [2019-10-14 21:48:16,788 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:16,788 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016305712] [2019-10-14 21:48:16,788 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:16,788 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 21:48:16,788 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047852908] [2019-10-14 21:48:16,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:48:16,790 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:16,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:48:16,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:16,790 INFO L87 Difference]: Start difference. First operand 111 states and 136 transitions. Second operand 5 states. [2019-10-14 21:48:16,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:16,946 INFO L93 Difference]: Finished difference Result 262 states and 332 transitions. [2019-10-14 21:48:16,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:48:16,948 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2019-10-14 21:48:16,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:16,950 INFO L225 Difference]: With dead ends: 262 [2019-10-14 21:48:16,950 INFO L226 Difference]: Without dead ends: 216 [2019-10-14 21:48:16,951 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:48:16,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-10-14 21:48:16,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 117. [2019-10-14 21:48:16,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-14 21:48:16,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 144 transitions. [2019-10-14 21:48:16,974 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 144 transitions. Word has length 73 [2019-10-14 21:48:16,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:16,974 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 144 transitions. [2019-10-14 21:48:16,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:48:16,975 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 144 transitions. [2019-10-14 21:48:16,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-14 21:48:16,975 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:16,975 INFO L380 BasicCegarLoop]: trace histogram [22, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:17,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:17,179 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:17,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:17,180 INFO L82 PathProgramCache]: Analyzing trace with hash 8781671, now seen corresponding path program 4 times [2019-10-14 21:48:17,180 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:17,181 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273163984] [2019-10-14 21:48:17,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:17,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:17,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:17,187 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:17,187 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652900290] [2019-10-14 21:48:17,187 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 21:48:17,234 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:48:17,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:17,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:48:17,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:17,274 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-10-14 21:48:17,275 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273163984] [2019-10-14 21:48:17,275 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:17,275 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652900290] [2019-10-14 21:48:17,275 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:17,275 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 21:48:17,276 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095091874] [2019-10-14 21:48:17,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:48:17,276 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:17,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:48:17,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:48:17,277 INFO L87 Difference]: Start difference. First operand 117 states and 144 transitions. Second operand 7 states. [2019-10-14 21:48:17,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:17,471 INFO L93 Difference]: Finished difference Result 200 states and 254 transitions. [2019-10-14 21:48:17,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:48:17,471 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 79 [2019-10-14 21:48:17,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:17,472 INFO L225 Difference]: With dead ends: 200 [2019-10-14 21:48:17,472 INFO L226 Difference]: Without dead ends: 127 [2019-10-14 21:48:17,473 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:48:17,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-10-14 21:48:17,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2019-10-14 21:48:17,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-14 21:48:17,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 155 transitions. [2019-10-14 21:48:17,494 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 155 transitions. Word has length 79 [2019-10-14 21:48:17,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:17,495 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 155 transitions. [2019-10-14 21:48:17,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:48:17,495 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 155 transitions. [2019-10-14 21:48:17,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-14 21:48:17,496 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:17,496 INFO L380 BasicCegarLoop]: trace histogram [22, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:17,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:17,700 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:17,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:17,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1423979302, now seen corresponding path program 5 times [2019-10-14 21:48:17,700 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:17,701 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382111733] [2019-10-14 21:48:17,701 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:17,701 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:17,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:17,722 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:17,722 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942054083] [2019-10-14 21:48:17,723 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