/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:23:24,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:23:24,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:23:24,157 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:23:24,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:23:24,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:23:24,161 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:23:24,173 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:23:24,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:23:24,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:23:24,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:23:24,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:23:24,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:23:24,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:23:24,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:23:24,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:23:24,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:23:24,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:23:24,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:23:24,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:23:24,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:23:24,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:23:24,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:23:24,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:23:24,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 21:23:24,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:23:24,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:23:24,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:23:24,225 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 21:23:24,245 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:23:24,245 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:23:24,247 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:23:24,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:23:24,248 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:23:24,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:23:24,248 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:23:24,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:23:24,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:23:24,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:23:24,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:23:24,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:23:24,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:23:24,251 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:23:24,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:23:24,251 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:23:24,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:23:24,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:23:24,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:23:24,252 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:23:24,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:23:24,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:23:24,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:23:24,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:23:24,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:23:24,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:23:24,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:23:24,254 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:23:24,254 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:23:24,497 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:23:24,510 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:23:24,513 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:23:24,514 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:23:24,515 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:23:24,515 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2019-11-06 21:23:24,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ea146ca5/79a1658d98514dfdadc8209eabd12e2f/FLAG0e3d0f220 [2019-11-06 21:23:25,003 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:23:25,005 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2019-11-06 21:23:25,011 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ea146ca5/79a1658d98514dfdadc8209eabd12e2f/FLAG0e3d0f220 [2019-11-06 21:23:25,412 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ea146ca5/79a1658d98514dfdadc8209eabd12e2f [2019-11-06 21:23:25,421 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:23:25,423 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:23:25,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:23:25,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:23:25,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:23:25,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:23:25" (1/1) ... [2019-11-06 21:23:25,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7712c365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:23:25, skipping insertion in model container [2019-11-06 21:23:25,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:23:25" (1/1) ... [2019-11-06 21:23:25,439 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:23:25,456 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:23:25,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:23:25,666 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:23:25,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:23:25,693 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:23:25,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:23:25 WrapperNode [2019-11-06 21:23:25,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:23:25,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:23:25,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:23:25,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:23:25,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:23:25" (1/1) ... [2019-11-06 21:23:25,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:23:25" (1/1) ... [2019-11-06 21:23:25,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:23:25" (1/1) ... [2019-11-06 21:23:25,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:23:25" (1/1) ... [2019-11-06 21:23:25,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:23:25" (1/1) ... [2019-11-06 21:23:25,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:23:25" (1/1) ... [2019-11-06 21:23:25,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:23:25" (1/1) ... [2019-11-06 21:23:25,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:23:25,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:23:25,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:23:25,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:23:25,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:23:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:23:25,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:23:25,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:23:25,857 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:23:25,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:23:25,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 21:23:25,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 21:23:25,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 21:23:25,858 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:23:25,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:23:25,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:23:26,027 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:23:26,027 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-06 21:23:26,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:23:26 BoogieIcfgContainer [2019-11-06 21:23:26,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:23:26,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:23:26,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:23:26,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:23:26,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:23:25" (1/3) ... [2019-11-06 21:23:26,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69caf0d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:23:26, skipping insertion in model container [2019-11-06 21:23:26,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:23:25" (2/3) ... [2019-11-06 21:23:26,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69caf0d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:23:26, skipping insertion in model container [2019-11-06 21:23:26,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:23:26" (3/3) ... [2019-11-06 21:23:26,040 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+cfa-reducer.c [2019-11-06 21:23:26,051 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:23:26,064 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:23:26,108 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:23:26,160 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:23:26,160 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:23:26,161 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:23:26,161 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:23:26,161 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:23:26,161 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:23:26,161 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:23:26,161 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:23:26,180 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-06 21:23:26,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-06 21:23:26,186 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:26,188 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:26,190 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:26,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:26,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1277702393, now seen corresponding path program 1 times [2019-11-06 21:23:26,206 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:26,206 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685024930] [2019-11-06 21:23:26,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:26,289 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:26,290 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135071620] [2019-11-06 21:23:26,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:23:26,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 21:23:26,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:26,406 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685024930] [2019-11-06 21:23:26,406 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:26,406 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135071620] [2019-11-06 21:23:26,407 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:23:26,407 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 21:23:26,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731952383] [2019-11-06 21:23:26,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 21:23:26,414 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:26,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 21:23:26,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 21:23:26,431 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2019-11-06 21:23:26,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:26,497 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-11-06 21:23:26,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 21:23:26,500 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-06 21:23:26,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:26,515 INFO L225 Difference]: With dead ends: 26 [2019-11-06 21:23:26,516 INFO L226 Difference]: Without dead ends: 13 [2019-11-06 21:23:26,522 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 21:23:26,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-06 21:23:26,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-06 21:23:26,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-06 21:23:26,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-11-06 21:23:26,584 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-11-06 21:23:26,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:26,585 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-11-06 21:23:26,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 21:23:26,586 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-11-06 21:23:26,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-06 21:23:26,588 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:26,589 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:26,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:26,793 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:26,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:26,794 INFO L82 PathProgramCache]: Analyzing trace with hash -954130992, now seen corresponding path program 1 times [2019-11-06 21:23:26,795 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:26,796 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927240586] [2019-11-06 21:23:26,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:26,813 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:26,814 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746539965] [2019-11-06 21:23:26,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:23:26,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 21:23:26,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:26,904 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:26,927 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927240586] [2019-11-06 21:23:26,927 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:26,927 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746539965] [2019-11-06 21:23:26,928 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:26,929 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-06 21:23:26,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036427850] [2019-11-06 21:23:26,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 21:23:26,931 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:26,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 21:23:26,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:23:26,932 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-11-06 21:23:26,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:26,994 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-11-06 21:23:26,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 21:23:26,995 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-11-06 21:23:26,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:26,996 INFO L225 Difference]: With dead ends: 17 [2019-11-06 21:23:26,996 INFO L226 Difference]: Without dead ends: 14 [2019-11-06 21:23:26,997 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:23:26,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-06 21:23:27,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-06 21:23:27,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-06 21:23:27,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-11-06 21:23:27,002 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-11-06 21:23:27,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:27,003 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-11-06 21:23:27,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 21:23:27,003 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-11-06 21:23:27,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-06 21:23:27,004 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:27,004 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:27,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:27,211 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:27,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:27,212 INFO L82 PathProgramCache]: Analyzing trace with hash 486647847, now seen corresponding path program 2 times [2019-11-06 21:23:27,212 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:27,213 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070163694] [2019-11-06 21:23:27,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:27,237 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:27,238 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1245397522] [2019-11-06 21:23:27,238 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:27,276 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:23:27,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:27,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 21:23:27,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:27,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:27,341 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070163694] [2019-11-06 21:23:27,342 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:27,342 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245397522] [2019-11-06 21:23:27,342 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:27,342 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-06 21:23:27,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895389538] [2019-11-06 21:23:27,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 21:23:27,343 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:27,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 21:23:27,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:23:27,344 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2019-11-06 21:23:27,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:27,403 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-11-06 21:23:27,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 21:23:27,404 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-06 21:23:27,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:27,405 INFO L225 Difference]: With dead ends: 18 [2019-11-06 21:23:27,405 INFO L226 Difference]: Without dead ends: 15 [2019-11-06 21:23:27,405 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:23:27,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-06 21:23:27,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-06 21:23:27,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-06 21:23:27,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-11-06 21:23:27,410 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-11-06 21:23:27,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:27,411 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-11-06 21:23:27,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 21:23:27,411 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-11-06 21:23:27,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-06 21:23:27,412 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:27,412 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:27,616 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:27,616 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:27,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:27,617 INFO L82 PathProgramCache]: Analyzing trace with hash -2093848400, now seen corresponding path program 3 times [2019-11-06 21:23:27,617 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:27,617 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586186189] [2019-11-06 21:23:27,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:27,628 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:27,629 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599306064] [2019-11-06 21:23:27,629 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:27,668 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 21:23:27,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:27,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 21:23:27,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:27,738 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:27,753 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586186189] [2019-11-06 21:23:27,753 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:27,753 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599306064] [2019-11-06 21:23:27,754 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:27,754 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 21:23:27,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657134123] [2019-11-06 21:23:27,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:23:27,755 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:27,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:23:27,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:23:27,756 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2019-11-06 21:23:27,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:27,830 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-11-06 21:23:27,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:23:27,830 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-11-06 21:23:27,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:27,831 INFO L225 Difference]: With dead ends: 19 [2019-11-06 21:23:27,831 INFO L226 Difference]: Without dead ends: 16 [2019-11-06 21:23:27,832 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:23:27,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-06 21:23:27,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-06 21:23:27,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-06 21:23:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-11-06 21:23:27,836 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-11-06 21:23:27,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:27,837 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-11-06 21:23:27,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:23:27,837 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-11-06 21:23:27,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 21:23:27,838 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:27,838 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:28,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:28,042 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:28,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:28,043 INFO L82 PathProgramCache]: Analyzing trace with hash -484853433, now seen corresponding path program 4 times [2019-11-06 21:23:28,043 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:28,043 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963739664] [2019-11-06 21:23:28,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:28,065 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:28,065 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678928833] [2019-11-06 21:23:28,065 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:28,150 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:23:28,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:28,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-06 21:23:28,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:28,202 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:28,225 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963739664] [2019-11-06 21:23:28,226 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:28,226 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678928833] [2019-11-06 21:23:28,226 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:28,226 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-06 21:23:28,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657287309] [2019-11-06 21:23:28,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 21:23:28,228 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:28,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 21:23:28,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:23:28,229 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2019-11-06 21:23:28,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:28,299 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-11-06 21:23:28,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 21:23:28,300 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-11-06 21:23:28,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:28,301 INFO L225 Difference]: With dead ends: 20 [2019-11-06 21:23:28,301 INFO L226 Difference]: Without dead ends: 17 [2019-11-06 21:23:28,302 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:23:28,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-06 21:23:28,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-06 21:23:28,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-06 21:23:28,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-11-06 21:23:28,306 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-11-06 21:23:28,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:28,306 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-11-06 21:23:28,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 21:23:28,307 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-11-06 21:23:28,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 21:23:28,307 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:28,308 INFO L410 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:28,516 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:28,516 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:28,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:28,517 INFO L82 PathProgramCache]: Analyzing trace with hash -2145617008, now seen corresponding path program 5 times [2019-11-06 21:23:28,517 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:28,517 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983124433] [2019-11-06 21:23:28,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:28,529 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:28,529 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021979203] [2019-11-06 21:23:28,529 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:28,560 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-06 21:23:28,560 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:28,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-06 21:23:28,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:28,649 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:28,668 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983124433] [2019-11-06 21:23:28,668 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:28,668 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021979203] [2019-11-06 21:23:28,669 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:28,669 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 21:23:28,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342268672] [2019-11-06 21:23:28,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:23:28,670 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:28,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:23:28,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:23:28,670 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2019-11-06 21:23:28,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:28,760 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-11-06 21:23:28,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:23:28,761 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-11-06 21:23:28,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:28,762 INFO L225 Difference]: With dead ends: 21 [2019-11-06 21:23:28,762 INFO L226 Difference]: Without dead ends: 18 [2019-11-06 21:23:28,762 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:23:28,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-06 21:23:28,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-06 21:23:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-06 21:23:28,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-11-06 21:23:28,770 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-11-06 21:23:28,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:28,771 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-11-06 21:23:28,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:23:28,776 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-11-06 21:23:28,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 21:23:28,777 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:28,777 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:28,977 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:28,978 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:28,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:28,978 INFO L82 PathProgramCache]: Analyzing trace with hash -2089680281, now seen corresponding path program 6 times [2019-11-06 21:23:28,978 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:28,979 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597154447] [2019-11-06 21:23:28,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:28,990 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:28,990 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41765006] [2019-11-06 21:23:28,990 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:29,030 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-06 21:23:29,030 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:29,032 WARN L254 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-06 21:23:29,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:29,112 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:29,137 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597154447] [2019-11-06 21:23:29,137 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:29,137 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41765006] [2019-11-06 21:23:29,137 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:29,137 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 21:23:29,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424694326] [2019-11-06 21:23:29,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:23:29,138 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:29,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:23:29,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:23:29,139 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2019-11-06 21:23:29,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:29,223 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-11-06 21:23:29,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:23:29,223 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-11-06 21:23:29,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:29,224 INFO L225 Difference]: With dead ends: 22 [2019-11-06 21:23:29,224 INFO L226 Difference]: Without dead ends: 19 [2019-11-06 21:23:29,225 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:23:29,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-06 21:23:29,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-06 21:23:29,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-06 21:23:29,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-11-06 21:23:29,230 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-11-06 21:23:29,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:29,230 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-11-06 21:23:29,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:23:29,230 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-11-06 21:23:29,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 21:23:29,231 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:29,231 INFO L410 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:29,434 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:29,435 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:29,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:29,436 INFO L82 PathProgramCache]: Analyzing trace with hash -355641744, now seen corresponding path program 7 times [2019-11-06 21:23:29,436 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:29,437 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432897424] [2019-11-06 21:23:29,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:29,453 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:29,453 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378470046] [2019-11-06 21:23:29,453 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:23:29,492 WARN L254 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-06 21:23:29,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:29,598 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:29,618 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432897424] [2019-11-06 21:23:29,619 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:29,619 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378470046] [2019-11-06 21:23:29,619 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:29,619 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-06 21:23:29,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40765111] [2019-11-06 21:23:29,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 21:23:29,620 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:29,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 21:23:29,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:23:29,621 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2019-11-06 21:23:29,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:29,737 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-11-06 21:23:29,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 21:23:29,738 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2019-11-06 21:23:29,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:29,738 INFO L225 Difference]: With dead ends: 23 [2019-11-06 21:23:29,738 INFO L226 Difference]: Without dead ends: 20 [2019-11-06 21:23:29,739 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:23:29,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-06 21:23:29,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-06 21:23:29,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-06 21:23:29,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-11-06 21:23:29,743 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2019-11-06 21:23:29,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:29,744 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-11-06 21:23:29,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 21:23:29,744 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-11-06 21:23:29,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 21:23:29,745 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:29,745 INFO L410 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:29,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:29,949 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:29,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:29,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1859945351, now seen corresponding path program 8 times [2019-11-06 21:23:29,950 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:29,951 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572771710] [2019-11-06 21:23:29,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:29,967 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:29,967 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370068135] [2019-11-06 21:23:29,967 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:30,011 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:23:30,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:30,012 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-06 21:23:30,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:30,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:30,141 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:30,142 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572771710] [2019-11-06 21:23:30,142 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:30,142 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370068135] [2019-11-06 21:23:30,142 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:30,142 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-06 21:23:30,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28988034] [2019-11-06 21:23:30,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 21:23:30,143 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:30,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 21:23:30,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:23:30,144 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 12 states. [2019-11-06 21:23:30,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:30,291 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-11-06 21:23:30,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 21:23:30,292 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-11-06 21:23:30,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:30,292 INFO L225 Difference]: With dead ends: 24 [2019-11-06 21:23:30,293 INFO L226 Difference]: Without dead ends: 21 [2019-11-06 21:23:30,293 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-11-06 21:23:30,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-06 21:23:30,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-06 21:23:30,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-06 21:23:30,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-11-06 21:23:30,298 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2019-11-06 21:23:30,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:30,298 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-11-06 21:23:30,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 21:23:30,298 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-11-06 21:23:30,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 21:23:30,299 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:30,299 INFO L410 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:30,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:30,503 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:30,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:30,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1823668560, now seen corresponding path program 9 times [2019-11-06 21:23:30,504 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:30,505 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33770446] [2019-11-06 21:23:30,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:30,516 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:30,516 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833068828] [2019-11-06 21:23:30,516 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:30,566 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 21:23:30,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:30,568 WARN L254 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 47 conjunts are in the unsatisfiable core [2019-11-06 21:23:30,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:30,692 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:30,709 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33770446] [2019-11-06 21:23:30,709 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:30,710 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833068828] [2019-11-06 21:23:30,710 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:30,710 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-06 21:23:30,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131912904] [2019-11-06 21:23:30,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 21:23:30,711 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:30,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 21:23:30,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-11-06 21:23:30,712 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2019-11-06 21:23:30,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:30,863 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-11-06 21:23:30,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 21:23:30,864 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2019-11-06 21:23:30,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:30,865 INFO L225 Difference]: With dead ends: 25 [2019-11-06 21:23:30,865 INFO L226 Difference]: Without dead ends: 22 [2019-11-06 21:23:30,865 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2019-11-06 21:23:30,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-06 21:23:30,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-06 21:23:30,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-06 21:23:30,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-11-06 21:23:30,870 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2019-11-06 21:23:30,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:30,870 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-11-06 21:23:30,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 21:23:30,871 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-11-06 21:23:30,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 21:23:30,871 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:30,871 INFO L410 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:31,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:31,076 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:31,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:31,077 INFO L82 PathProgramCache]: Analyzing trace with hash 699088039, now seen corresponding path program 10 times [2019-11-06 21:23:31,077 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:31,077 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651509302] [2019-11-06 21:23:31,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:31,091 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:31,091 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362660628] [2019-11-06 21:23:31,091 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:31,190 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:23:31,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:31,191 WARN L254 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 51 conjunts are in the unsatisfiable core [2019-11-06 21:23:31,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:31,358 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:31,384 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651509302] [2019-11-06 21:23:31,385 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:31,385 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362660628] [2019-11-06 21:23:31,385 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:31,385 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-06 21:23:31,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040226481] [2019-11-06 21:23:31,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 21:23:31,386 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:31,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 21:23:31,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-11-06 21:23:31,387 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2019-11-06 21:23:31,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:31,564 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-11-06 21:23:31,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 21:23:31,565 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-11-06 21:23:31,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:31,566 INFO L225 Difference]: With dead ends: 26 [2019-11-06 21:23:31,566 INFO L226 Difference]: Without dead ends: 23 [2019-11-06 21:23:31,566 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-11-06 21:23:31,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-06 21:23:31,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-06 21:23:31,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-06 21:23:31,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-11-06 21:23:31,571 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2019-11-06 21:23:31,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:31,571 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-11-06 21:23:31,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 21:23:31,571 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-11-06 21:23:31,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 21:23:31,572 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:31,572 INFO L410 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:31,782 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:31,783 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:31,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:31,783 INFO L82 PathProgramCache]: Analyzing trace with hash 196830256, now seen corresponding path program 11 times [2019-11-06 21:23:31,784 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:31,784 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423906763] [2019-11-06 21:23:31,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:31,808 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:31,808 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904924675] [2019-11-06 21:23:31,809 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:31,855 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-06 21:23:31,856 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:31,857 WARN L254 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 55 conjunts are in the unsatisfiable core [2019-11-06 21:23:31,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:32,028 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:32,045 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423906763] [2019-11-06 21:23:32,045 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:32,045 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904924675] [2019-11-06 21:23:32,046 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:32,046 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-11-06 21:23:32,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505251283] [2019-11-06 21:23:32,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 21:23:32,046 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:32,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 21:23:32,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-11-06 21:23:32,047 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2019-11-06 21:23:32,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:32,216 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-11-06 21:23:32,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 21:23:32,216 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2019-11-06 21:23:32,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:32,217 INFO L225 Difference]: With dead ends: 27 [2019-11-06 21:23:32,217 INFO L226 Difference]: Without dead ends: 24 [2019-11-06 21:23:32,217 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-11-06 21:23:32,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-06 21:23:32,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-06 21:23:32,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-06 21:23:32,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-11-06 21:23:32,222 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2019-11-06 21:23:32,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:32,222 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-11-06 21:23:32,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 21:23:32,222 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-11-06 21:23:32,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 21:23:32,223 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:32,223 INFO L410 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:32,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:32,424 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:32,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:32,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1806708167, now seen corresponding path program 12 times [2019-11-06 21:23:32,425 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:32,426 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19652554] [2019-11-06 21:23:32,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:32,439 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:32,439 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808798367] [2019-11-06 21:23:32,439 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:32,478 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 21:23:32,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:32,479 WARN L254 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2019-11-06 21:23:32,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:32,667 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:32,691 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19652554] [2019-11-06 21:23:32,691 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:32,691 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808798367] [2019-11-06 21:23:32,691 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:32,692 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-11-06 21:23:32,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702078943] [2019-11-06 21:23:32,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 21:23:32,692 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:32,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 21:23:32,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2019-11-06 21:23:32,693 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2019-11-06 21:23:32,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:32,866 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-11-06 21:23:32,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 21:23:32,868 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-11-06 21:23:32,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:32,869 INFO L225 Difference]: With dead ends: 28 [2019-11-06 21:23:32,869 INFO L226 Difference]: Without dead ends: 25 [2019-11-06 21:23:32,869 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-11-06 21:23:32,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-06 21:23:32,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-06 21:23:32,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-06 21:23:32,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-11-06 21:23:32,875 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2019-11-06 21:23:32,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:32,875 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-11-06 21:23:32,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 21:23:32,875 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-11-06 21:23:32,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 21:23:32,879 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:32,881 INFO L410 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:33,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:33,085 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:33,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:33,085 INFO L82 PathProgramCache]: Analyzing trace with hash 173315856, now seen corresponding path program 13 times [2019-11-06 21:23:33,086 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:33,086 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624117381] [2019-11-06 21:23:33,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:33,098 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:33,098 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876816407] [2019-11-06 21:23:33,098 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:23:33,137 WARN L254 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 63 conjunts are in the unsatisfiable core [2019-11-06 21:23:33,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:33,318 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:33,335 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624117381] [2019-11-06 21:23:33,335 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:33,336 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876816407] [2019-11-06 21:23:33,336 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:33,336 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-11-06 21:23:33,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834279661] [2019-11-06 21:23:33,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 21:23:33,336 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:33,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 21:23:33,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2019-11-06 21:23:33,337 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2019-11-06 21:23:33,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:33,565 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-11-06 21:23:33,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 21:23:33,566 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-11-06 21:23:33,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:33,567 INFO L225 Difference]: With dead ends: 29 [2019-11-06 21:23:33,567 INFO L226 Difference]: Without dead ends: 26 [2019-11-06 21:23:33,568 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-11-06 21:23:33,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-06 21:23:33,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-06 21:23:33,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 21:23:33,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-11-06 21:23:33,572 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2019-11-06 21:23:33,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:33,572 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-11-06 21:23:33,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 21:23:33,573 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-11-06 21:23:33,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 21:23:33,573 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:33,573 INFO L410 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:33,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:33,779 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:33,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:33,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1077761767, now seen corresponding path program 14 times [2019-11-06 21:23:33,780 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:33,781 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237789203] [2019-11-06 21:23:33,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:33,792 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:33,792 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649166884] [2019-11-06 21:23:33,793 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:33,834 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:23:33,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:33,836 WARN L254 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 67 conjunts are in the unsatisfiable core [2019-11-06 21:23:33,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:34,053 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:34,080 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237789203] [2019-11-06 21:23:34,080 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:34,080 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649166884] [2019-11-06 21:23:34,081 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:34,081 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-11-06 21:23:34,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859820188] [2019-11-06 21:23:34,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 21:23:34,081 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:34,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 21:23:34,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2019-11-06 21:23:34,082 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2019-11-06 21:23:34,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:34,304 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-11-06 21:23:34,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 21:23:34,305 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2019-11-06 21:23:34,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:34,305 INFO L225 Difference]: With dead ends: 30 [2019-11-06 21:23:34,306 INFO L226 Difference]: Without dead ends: 27 [2019-11-06 21:23:34,306 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2019-11-06 21:23:34,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-06 21:23:34,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-06 21:23:34,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 21:23:34,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-11-06 21:23:34,311 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2019-11-06 21:23:34,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:34,311 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-11-06 21:23:34,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 21:23:34,312 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-11-06 21:23:34,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 21:23:34,312 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:34,312 INFO L410 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:34,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:34,521 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:34,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:34,522 INFO L82 PathProgramCache]: Analyzing trace with hash -949186064, now seen corresponding path program 15 times [2019-11-06 21:23:34,522 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:34,523 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030334280] [2019-11-06 21:23:34,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:34,532 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:34,533 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896433207] [2019-11-06 21:23:34,533 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:34,604 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-06 21:23:34,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:34,606 WARN L254 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 71 conjunts are in the unsatisfiable core [2019-11-06 21:23:34,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:34,865 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:34,886 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030334280] [2019-11-06 21:23:34,886 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:34,886 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896433207] [2019-11-06 21:23:34,887 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:34,887 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-11-06 21:23:34,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971495294] [2019-11-06 21:23:34,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 21:23:34,887 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:34,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 21:23:34,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2019-11-06 21:23:34,888 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2019-11-06 21:23:35,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:35,158 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-11-06 21:23:35,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 21:23:35,161 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2019-11-06 21:23:35,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:35,161 INFO L225 Difference]: With dead ends: 31 [2019-11-06 21:23:35,161 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 21:23:35,162 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2019-11-06 21:23:35,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 21:23:35,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-06 21:23:35,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 21:23:35,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-11-06 21:23:35,167 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2019-11-06 21:23:35,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:35,167 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-11-06 21:23:35,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 21:23:35,167 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-11-06 21:23:35,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 21:23:35,168 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:35,168 INFO L410 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:35,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:35,380 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:35,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:35,380 INFO L82 PathProgramCache]: Analyzing trace with hash 639940615, now seen corresponding path program 16 times [2019-11-06 21:23:35,381 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:35,381 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31371469] [2019-11-06 21:23:35,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:35,391 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:35,391 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320516382] [2019-11-06 21:23:35,392 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:35,520 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:23:35,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:35,522 WARN L254 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 75 conjunts are in the unsatisfiable core [2019-11-06 21:23:35,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:35,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:35,762 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31371469] [2019-11-06 21:23:35,762 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:35,762 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320516382] [2019-11-06 21:23:35,762 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:35,763 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-11-06 21:23:35,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745811296] [2019-11-06 21:23:35,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 21:23:35,763 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:35,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 21:23:35,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2019-11-06 21:23:35,764 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2019-11-06 21:23:36,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:36,042 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-11-06 21:23:36,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 21:23:36,042 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-11-06 21:23:36,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:36,043 INFO L225 Difference]: With dead ends: 32 [2019-11-06 21:23:36,043 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 21:23:36,044 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-11-06 21:23:36,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 21:23:36,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-06 21:23:36,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 21:23:36,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-11-06 21:23:36,050 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2019-11-06 21:23:36,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:36,050 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-11-06 21:23:36,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 21:23:36,050 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-11-06 21:23:36,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 21:23:36,051 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:36,051 INFO L410 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:36,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:36,255 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:36,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:36,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1636739888, now seen corresponding path program 17 times [2019-11-06 21:23:36,256 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:36,256 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650858571] [2019-11-06 21:23:36,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:36,272 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:36,273 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325573248] [2019-11-06 21:23:36,273 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:36,340 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-06 21:23:36,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:36,342 WARN L254 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 79 conjunts are in the unsatisfiable core [2019-11-06 21:23:36,343 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:36,632 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:36,659 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650858571] [2019-11-06 21:23:36,659 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:36,660 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325573248] [2019-11-06 21:23:36,660 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:36,660 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-11-06 21:23:36,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002201484] [2019-11-06 21:23:36,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 21:23:36,661 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:36,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 21:23:36,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2019-11-06 21:23:36,661 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 21 states. [2019-11-06 21:23:37,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:37,004 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-11-06 21:23:37,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 21:23:37,004 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2019-11-06 21:23:37,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:37,005 INFO L225 Difference]: With dead ends: 33 [2019-11-06 21:23:37,005 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 21:23:37,006 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2019-11-06 21:23:37,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 21:23:37,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-06 21:23:37,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-06 21:23:37,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-11-06 21:23:37,012 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2019-11-06 21:23:37,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:37,012 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-11-06 21:23:37,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 21:23:37,012 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-11-06 21:23:37,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-06 21:23:37,013 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:37,013 INFO L410 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:37,222 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:37,222 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:37,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:37,223 INFO L82 PathProgramCache]: Analyzing trace with hash 800608551, now seen corresponding path program 18 times [2019-11-06 21:23:37,223 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:37,223 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148876941] [2019-11-06 21:23:37,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:37,234 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:37,234 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997943968] [2019-11-06 21:23:37,234 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:37,314 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-11-06 21:23:37,314 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:37,316 WARN L254 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 83 conjunts are in the unsatisfiable core [2019-11-06 21:23:37,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:37,587 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:37,612 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148876941] [2019-11-06 21:23:37,612 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:37,612 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997943968] [2019-11-06 21:23:37,612 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:37,612 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-11-06 21:23:37,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204021930] [2019-11-06 21:23:37,613 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 21:23:37,613 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:37,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 21:23:37,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2019-11-06 21:23:37,614 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 22 states. [2019-11-06 21:23:37,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:37,920 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-11-06 21:23:37,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-06 21:23:37,920 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2019-11-06 21:23:37,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:37,921 INFO L225 Difference]: With dead ends: 34 [2019-11-06 21:23:37,922 INFO L226 Difference]: Without dead ends: 31 [2019-11-06 21:23:37,922 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2019-11-06 21:23:37,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-06 21:23:37,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-06 21:23:37,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-06 21:23:37,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-11-06 21:23:37,928 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2019-11-06 21:23:37,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:37,928 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-11-06 21:23:37,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-06 21:23:37,928 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-11-06 21:23:37,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 21:23:37,929 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:37,929 INFO L410 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:38,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:38,133 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:38,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:38,134 INFO L82 PathProgramCache]: Analyzing trace with hash -951001168, now seen corresponding path program 19 times [2019-11-06 21:23:38,134 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:38,134 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790329316] [2019-11-06 21:23:38,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:38,144 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:38,144 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453346619] [2019-11-06 21:23:38,144 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:23:38,202 WARN L254 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 87 conjunts are in the unsatisfiable core [2019-11-06 21:23:38,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:38,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:38,566 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790329316] [2019-11-06 21:23:38,566 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:38,566 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453346619] [2019-11-06 21:23:38,566 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:38,567 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-11-06 21:23:38,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840776549] [2019-11-06 21:23:38,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-06 21:23:38,567 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:38,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-06 21:23:38,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2019-11-06 21:23:38,568 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2019-11-06 21:23:38,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:38,990 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-11-06 21:23:38,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 21:23:38,991 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-11-06 21:23:38,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:38,991 INFO L225 Difference]: With dead ends: 35 [2019-11-06 21:23:38,991 INFO L226 Difference]: Without dead ends: 32 [2019-11-06 21:23:38,992 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2019-11-06 21:23:38,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-06 21:23:38,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-06 21:23:38,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 21:23:39,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-11-06 21:23:39,000 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2019-11-06 21:23:39,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:39,000 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-11-06 21:23:39,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-06 21:23:39,001 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-11-06 21:23:39,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 21:23:39,002 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:39,002 INFO L410 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:39,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:39,203 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:39,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:39,203 INFO L82 PathProgramCache]: Analyzing trace with hash 583672391, now seen corresponding path program 20 times [2019-11-06 21:23:39,204 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:39,204 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184552706] [2019-11-06 21:23:39,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:39,216 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:39,216 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732711130] [2019-11-06 21:23:39,216 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 [2019-11-06 21:23:39,279 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:23:39,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:39,280 WARN L254 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 91 conjunts are in the unsatisfiable core [2019-11-06 21:23:39,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:39,628 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:39,652 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184552706] [2019-11-06 21:23:39,652 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:39,653 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732711130] [2019-11-06 21:23:39,653 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:39,653 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-11-06 21:23:39,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507219141] [2019-11-06 21:23:39,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 21:23:39,654 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:39,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 21:23:39,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2019-11-06 21:23:39,654 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2019-11-06 21:23:40,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:40,117 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-11-06 21:23:40,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 21:23:40,117 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2019-11-06 21:23:40,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:40,118 INFO L225 Difference]: With dead ends: 36 [2019-11-06 21:23:40,119 INFO L226 Difference]: Without dead ends: 33 [2019-11-06 21:23:40,120 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2019-11-06 21:23:40,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-06 21:23:40,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-06 21:23:40,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 21:23:40,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-11-06 21:23:40,129 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2019-11-06 21:23:40,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:40,129 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-11-06 21:23:40,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 21:23:40,129 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-11-06 21:23:40,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 21:23:40,130 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:40,130 INFO L410 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:40,340 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:40,341 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:40,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:40,341 INFO L82 PathProgramCache]: Analyzing trace with hash 913912464, now seen corresponding path program 21 times [2019-11-06 21:23:40,341 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:40,342 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737869393] [2019-11-06 21:23:40,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:40,356 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:40,356 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292428093] [2019-11-06 21:23:40,356 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 [2019-11-06 21:23:40,503 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-06 21:23:40,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:40,505 WARN L254 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 95 conjunts are in the unsatisfiable core [2019-11-06 21:23:40,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:40,864 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:40,902 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737869393] [2019-11-06 21:23:40,902 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:40,902 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292428093] [2019-11-06 21:23:40,902 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:40,903 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-11-06 21:23:40,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121362811] [2019-11-06 21:23:40,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 21:23:40,903 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:40,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 21:23:40,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-11-06 21:23:40,904 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2019-11-06 21:23:41,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:41,344 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-11-06 21:23:41,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-06 21:23:41,346 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-11-06 21:23:41,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:41,347 INFO L225 Difference]: With dead ends: 37 [2019-11-06 21:23:41,347 INFO L226 Difference]: Without dead ends: 34 [2019-11-06 21:23:41,347 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2019-11-06 21:23:41,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-06 21:23:41,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-11-06 21:23:41,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 21:23:41,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-11-06 21:23:41,352 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2019-11-06 21:23:41,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:41,352 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-11-06 21:23:41,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-06 21:23:41,352 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-11-06 21:23:41,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-06 21:23:41,353 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:41,353 INFO L410 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:41,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:41,556 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:41,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:41,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1733547161, now seen corresponding path program 22 times [2019-11-06 21:23:41,557 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:41,557 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383079888] [2019-11-06 21:23:41,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:41,566 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:41,567 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [897012744] [2019-11-06 21:23:41,567 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 [2019-11-06 21:23:41,778 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:23:41,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:41,780 WARN L254 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 99 conjunts are in the unsatisfiable core [2019-11-06 21:23:41,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:42,157 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:42,188 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383079888] [2019-11-06 21:23:42,189 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:42,189 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897012744] [2019-11-06 21:23:42,189 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:42,189 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-11-06 21:23:42,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189725101] [2019-11-06 21:23:42,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-06 21:23:42,190 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:42,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-06 21:23:42,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2019-11-06 21:23:42,191 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 26 states. [2019-11-06 21:23:42,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:42,708 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-11-06 21:23:42,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-06 21:23:42,709 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2019-11-06 21:23:42,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:42,709 INFO L225 Difference]: With dead ends: 38 [2019-11-06 21:23:42,709 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 21:23:42,710 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-11-06 21:23:42,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 21:23:42,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-06 21:23:42,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 21:23:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-11-06 21:23:42,716 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2019-11-06 21:23:42,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:42,716 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-11-06 21:23:42,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-06 21:23:42,717 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-11-06 21:23:42,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 21:23:42,717 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:42,717 INFO L410 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:42,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:42,920 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:42,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:42,921 INFO L82 PathProgramCache]: Analyzing trace with hash 2094550384, now seen corresponding path program 23 times [2019-11-06 21:23:42,921 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:42,921 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773162507] [2019-11-06 21:23:42,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:42,930 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:42,930 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [299718060] [2019-11-06 21:23:42,930 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:42,998 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-06 21:23:42,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:43,001 WARN L254 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 103 conjunts are in the unsatisfiable core [2019-11-06 21:23:43,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:43,364 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:43,391 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773162507] [2019-11-06 21:23:43,391 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:43,391 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299718060] [2019-11-06 21:23:43,391 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:43,391 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-11-06 21:23:43,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090005448] [2019-11-06 21:23:43,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 21:23:43,392 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:43,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 21:23:43,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2019-11-06 21:23:43,393 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2019-11-06 21:23:43,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:43,886 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-11-06 21:23:43,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 21:23:43,887 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2019-11-06 21:23:43,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:43,888 INFO L225 Difference]: With dead ends: 39 [2019-11-06 21:23:43,888 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 21:23:43,889 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2019-11-06 21:23:43,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 21:23:43,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-06 21:23:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-06 21:23:43,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-11-06 21:23:43,895 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2019-11-06 21:23:43,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:43,895 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-11-06 21:23:43,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 21:23:43,895 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-11-06 21:23:43,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 21:23:43,896 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:43,896 INFO L410 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:44,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:44,109 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:44,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:44,110 INFO L82 PathProgramCache]: Analyzing trace with hash 506489991, now seen corresponding path program 24 times [2019-11-06 21:23:44,110 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:44,110 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457775608] [2019-11-06 21:23:44,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:44,119 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:44,119 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063752108] [2019-11-06 21:23:44,119 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:44,211 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-06 21:23:44,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:44,213 WARN L254 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 107 conjunts are in the unsatisfiable core [2019-11-06 21:23:44,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:44,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:44,677 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457775608] [2019-11-06 21:23:44,677 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:44,677 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063752108] [2019-11-06 21:23:44,677 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:44,677 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-11-06 21:23:44,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233896491] [2019-11-06 21:23:44,677 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 21:23:44,678 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:44,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 21:23:44,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2019-11-06 21:23:44,678 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 28 states. [2019-11-06 21:23:45,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:45,255 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-11-06 21:23:45,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 21:23:45,256 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2019-11-06 21:23:45,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:45,256 INFO L225 Difference]: With dead ends: 40 [2019-11-06 21:23:45,257 INFO L226 Difference]: Without dead ends: 37 [2019-11-06 21:23:45,257 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2019-11-06 21:23:45,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-06 21:23:45,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-06 21:23:45,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-06 21:23:45,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-11-06 21:23:45,262 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2019-11-06 21:23:45,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:45,262 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-11-06 21:23:45,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 21:23:45,262 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-11-06 21:23:45,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-06 21:23:45,263 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:45,263 INFO L410 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:45,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:45,465 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:45,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:45,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1478741936, now seen corresponding path program 25 times [2019-11-06 21:23:45,465 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:45,466 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370122338] [2019-11-06 21:23:45,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:45,474 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:45,474 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54946895] [2019-11-06 21:23:45,474 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:23:45,545 WARN L254 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 111 conjunts are in the unsatisfiable core [2019-11-06 21:23:45,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:45,981 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:46,011 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370122338] [2019-11-06 21:23:46,011 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:46,012 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54946895] [2019-11-06 21:23:46,012 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:46,012 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-11-06 21:23:46,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490134258] [2019-11-06 21:23:46,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-06 21:23:46,013 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:46,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-06 21:23:46,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2019-11-06 21:23:46,014 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 29 states. [2019-11-06 21:23:46,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:46,575 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-11-06 21:23:46,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-06 21:23:46,575 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2019-11-06 21:23:46,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:46,576 INFO L225 Difference]: With dead ends: 41 [2019-11-06 21:23:46,576 INFO L226 Difference]: Without dead ends: 38 [2019-11-06 21:23:46,577 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2019-11-06 21:23:46,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-06 21:23:46,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-06 21:23:46,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-06 21:23:46,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-11-06 21:23:46,583 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2019-11-06 21:23:46,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:46,583 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-11-06 21:23:46,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-06 21:23:46,583 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-11-06 21:23:46,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 21:23:46,584 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:46,584 INFO L410 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:46,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:46,787 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:46,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:46,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1403577767, now seen corresponding path program 26 times [2019-11-06 21:23:46,788 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:46,788 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248768932] [2019-11-06 21:23:46,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:46,797 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:46,797 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181081725] [2019-11-06 21:23:46,798 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:46,869 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:23:46,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:46,871 WARN L254 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 115 conjunts are in the unsatisfiable core [2019-11-06 21:23:46,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:47,311 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:47,340 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248768932] [2019-11-06 21:23:47,340 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:47,340 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181081725] [2019-11-06 21:23:47,340 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:47,340 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-11-06 21:23:47,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416331308] [2019-11-06 21:23:47,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-06 21:23:47,341 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:47,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-06 21:23:47,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2019-11-06 21:23:47,342 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 30 states. [2019-11-06 21:23:47,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:47,949 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-11-06 21:23:47,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-06 21:23:47,950 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2019-11-06 21:23:47,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:47,951 INFO L225 Difference]: With dead ends: 42 [2019-11-06 21:23:47,951 INFO L226 Difference]: Without dead ends: 39 [2019-11-06 21:23:47,952 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2019-11-06 21:23:47,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-06 21:23:47,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-06 21:23:47,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 21:23:47,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-11-06 21:23:47,957 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2019-11-06 21:23:47,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:47,958 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-11-06 21:23:47,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-06 21:23:47,958 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-11-06 21:23:47,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 21:23:47,958 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:47,958 INFO L410 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:48,162 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:48,162 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:48,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:48,163 INFO L82 PathProgramCache]: Analyzing trace with hash 561175344, now seen corresponding path program 27 times [2019-11-06 21:23:48,163 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:48,164 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365288696] [2019-11-06 21:23:48,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:48,172 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:48,173 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096561720] [2019-11-06 21:23:48,173 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:48,494 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-11-06 21:23:48,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:48,497 WARN L254 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 119 conjunts are in the unsatisfiable core [2019-11-06 21:23:48,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:49,007 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:49,037 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365288696] [2019-11-06 21:23:49,037 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:49,038 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096561720] [2019-11-06 21:23:49,038 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:49,038 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-11-06 21:23:49,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910978585] [2019-11-06 21:23:49,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-06 21:23:49,039 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:49,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-06 21:23:49,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2019-11-06 21:23:49,039 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 31 states. [2019-11-06 21:23:49,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:49,707 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-11-06 21:23:49,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-06 21:23:49,708 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2019-11-06 21:23:49,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:49,709 INFO L225 Difference]: With dead ends: 43 [2019-11-06 21:23:49,709 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 21:23:49,710 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2019-11-06 21:23:49,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 21:23:49,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-06 21:23:49,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 21:23:49,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-11-06 21:23:49,716 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2019-11-06 21:23:49,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:49,716 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-11-06 21:23:49,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-06 21:23:49,716 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-11-06 21:23:49,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 21:23:49,717 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:49,717 INFO L410 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:49,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:49,921 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:49,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:49,921 INFO L82 PathProgramCache]: Analyzing trace with hash 216504007, now seen corresponding path program 28 times [2019-11-06 21:23:49,921 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:49,922 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150431416] [2019-11-06 21:23:49,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:49,930 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:49,931 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107283491] [2019-11-06 21:23:49,931 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:50,180 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:23:50,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:50,184 WARN L254 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 123 conjunts are in the unsatisfiable core [2019-11-06 21:23:50,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:50,711 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:50,743 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150431416] [2019-11-06 21:23:50,743 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:50,744 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107283491] [2019-11-06 21:23:50,744 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:50,744 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-11-06 21:23:50,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594026360] [2019-11-06 21:23:50,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-06 21:23:50,744 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:50,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-06 21:23:50,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2019-11-06 21:23:50,745 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 32 states. [2019-11-06 21:23:51,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:51,440 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-11-06 21:23:51,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-06 21:23:51,441 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2019-11-06 21:23:51,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:51,442 INFO L225 Difference]: With dead ends: 44 [2019-11-06 21:23:51,442 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 21:23:51,443 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-11-06 21:23:51,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 21:23:51,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-06 21:23:51,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 21:23:51,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-11-06 21:23:51,448 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2019-11-06 21:23:51,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:51,449 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-11-06 21:23:51,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-06 21:23:51,449 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-11-06 21:23:51,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 21:23:51,449 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:51,449 INFO L410 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:51,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:51,653 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:51,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:51,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1878372848, now seen corresponding path program 29 times [2019-11-06 21:23:51,654 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:51,655 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197572759] [2019-11-06 21:23:51,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:51,662 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:51,662 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1196017759] [2019-11-06 21:23:51,662 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:51,747 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-11-06 21:23:51,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:51,749 WARN L254 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 127 conjunts are in the unsatisfiable core [2019-11-06 21:23:51,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:52,355 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:52,387 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197572759] [2019-11-06 21:23:52,387 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:52,387 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196017759] [2019-11-06 21:23:52,387 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:52,387 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-11-06 21:23:52,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988372518] [2019-11-06 21:23:52,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-06 21:23:52,388 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:52,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-06 21:23:52,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2019-11-06 21:23:52,388 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 33 states. [2019-11-06 21:23:53,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:53,117 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-11-06 21:23:53,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-06 21:23:53,117 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2019-11-06 21:23:53,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:53,118 INFO L225 Difference]: With dead ends: 45 [2019-11-06 21:23:53,118 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 21:23:53,119 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 21:23:53,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 21:23:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-11-06 21:23:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-06 21:23:53,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-11-06 21:23:53,123 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2019-11-06 21:23:53,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:53,123 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-11-06 21:23:53,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-06 21:23:53,123 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-11-06 21:23:53,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 21:23:53,123 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:53,124 INFO L410 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:53,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:53,324 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:53,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:53,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1899921383, now seen corresponding path program 30 times [2019-11-06 21:23:53,325 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:53,326 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592284419] [2019-11-06 21:23:53,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:53,335 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:53,335 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054184853] [2019-11-06 21:23:53,336 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:53,500 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-11-06 21:23:53,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:53,505 WARN L254 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 131 conjunts are in the unsatisfiable core [2019-11-06 21:23:53,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:54,094 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:54,125 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592284419] [2019-11-06 21:23:54,125 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:54,125 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054184853] [2019-11-06 21:23:54,125 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:54,125 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-11-06 21:23:54,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765877258] [2019-11-06 21:23:54,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-06 21:23:54,126 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:54,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-06 21:23:54,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 21:23:54,127 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 34 states. [2019-11-06 21:23:54,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:54,917 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-11-06 21:23:54,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-06 21:23:54,924 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2019-11-06 21:23:54,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:54,924 INFO L225 Difference]: With dead ends: 46 [2019-11-06 21:23:54,925 INFO L226 Difference]: Without dead ends: 43 [2019-11-06 21:23:54,925 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 21:23:54,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-06 21:23:54,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-06 21:23:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-06 21:23:54,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-11-06 21:23:54,932 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2019-11-06 21:23:54,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:54,933 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-11-06 21:23:54,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-06 21:23:54,933 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-11-06 21:23:54,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 21:23:54,933 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:54,933 INFO L410 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:55,138 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:55,139 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:55,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:55,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1232041744, now seen corresponding path program 31 times [2019-11-06 21:23:55,140 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:55,140 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773454950] [2019-11-06 21:23:55,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:55,148 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:55,149 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392694797] [2019-11-06 21:23:55,149 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:23:55,250 WARN L254 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 135 conjunts are in the unsatisfiable core [2019-11-06 21:23:55,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:55,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:55,915 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773454950] [2019-11-06 21:23:55,915 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:55,916 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392694797] [2019-11-06 21:23:55,916 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:55,916 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-11-06 21:23:55,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026022946] [2019-11-06 21:23:55,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-06 21:23:55,917 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:55,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-06 21:23:55,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 21:23:55,917 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 35 states. [2019-11-06 21:23:56,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:56,724 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-11-06 21:23:56,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-06 21:23:56,724 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2019-11-06 21:23:56,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:56,725 INFO L225 Difference]: With dead ends: 47 [2019-11-06 21:23:56,725 INFO L226 Difference]: Without dead ends: 44 [2019-11-06 21:23:56,726 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 21:23:56,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-06 21:23:56,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-06 21:23:56,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 21:23:56,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-11-06 21:23:56,732 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2019-11-06 21:23:56,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:56,732 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-11-06 21:23:56,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-06 21:23:56,732 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-11-06 21:23:56,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 21:23:56,733 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:56,733 INFO L410 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:56,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:56,934 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:56,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:56,935 INFO L82 PathProgramCache]: Analyzing trace with hash 461349127, now seen corresponding path program 32 times [2019-11-06 21:23:56,935 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:56,936 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534978886] [2019-11-06 21:23:56,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:56,944 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:56,944 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677543222] [2019-11-06 21:23:56,945 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:57,048 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:23:57,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:57,051 WARN L254 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 139 conjunts are in the unsatisfiable core [2019-11-06 21:23:57,053 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:57,990 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:58,039 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534978886] [2019-11-06 21:23:58,039 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:58,039 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677543222] [2019-11-06 21:23:58,039 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:58,039 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-11-06 21:23:58,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516814312] [2019-11-06 21:23:58,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-06 21:23:58,040 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:58,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-06 21:23:58,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 21:23:58,040 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 36 states. [2019-11-06 21:23:59,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:59,304 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-11-06 21:23:59,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-06 21:23:59,304 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2019-11-06 21:23:59,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:59,305 INFO L225 Difference]: With dead ends: 48 [2019-11-06 21:23:59,305 INFO L226 Difference]: Without dead ends: 45 [2019-11-06 21:23:59,306 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2019-11-06 21:23:59,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-06 21:23:59,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-11-06 21:23:59,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-06 21:23:59,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-11-06 21:23:59,310 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2019-11-06 21:23:59,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:59,310 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-11-06 21:23:59,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-06 21:23:59,311 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-11-06 21:23:59,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-06 21:23:59,311 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:59,311 INFO L410 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:59,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:59,512 INFO L410 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:59,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:59,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1416858576, now seen corresponding path program 33 times [2019-11-06 21:23:59,513 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:59,513 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553805909] [2019-11-06 21:23:59,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:59,523 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:59,523 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113123273] [2019-11-06 21:23:59,523 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:00,218 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-11-06 21:24:00,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:24:00,221 WARN L254 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 143 conjunts are in the unsatisfiable core [2019-11-06 21:24:00,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:24:00,919 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:24:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:24:00,956 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553805909] [2019-11-06 21:24:00,956 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:24:00,956 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113123273] [2019-11-06 21:24:00,956 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:24:00,956 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-11-06 21:24:00,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138904558] [2019-11-06 21:24:00,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-06 21:24:00,957 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:24:00,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-06 21:24:00,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2019-11-06 21:24:00,958 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 37 states. [2019-11-06 21:24:01,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:24:01,865 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-11-06 21:24:01,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-06 21:24:01,865 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2019-11-06 21:24:01,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:24:01,866 INFO L225 Difference]: With dead ends: 49 [2019-11-06 21:24:01,866 INFO L226 Difference]: Without dead ends: 46 [2019-11-06 21:24:01,867 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2019-11-06 21:24:01,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-06 21:24:01,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-11-06 21:24:01,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 21:24:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-11-06 21:24:01,873 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2019-11-06 21:24:01,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:24:01,873 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-11-06 21:24:01,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-06 21:24:01,873 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-11-06 21:24:01,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 21:24:01,874 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:24:01,874 INFO L410 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:24:02,077 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:02,078 INFO L410 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:24:02,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:24:02,079 INFO L82 PathProgramCache]: Analyzing trace with hash 972880423, now seen corresponding path program 34 times [2019-11-06 21:24:02,079 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:24:02,079 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327015300] [2019-11-06 21:24:02,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:24:02,088 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:24:02,088 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1421692763] [2019-11-06 21:24:02,089 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:02,404 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:24:02,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:24:02,407 WARN L254 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 147 conjunts are in the unsatisfiable core [2019-11-06 21:24:02,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:24:03,108 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:24:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:24:03,147 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327015300] [2019-11-06 21:24:03,147 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:24:03,147 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421692763] [2019-11-06 21:24:03,148 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:24:03,148 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-11-06 21:24:03,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008978324] [2019-11-06 21:24:03,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-06 21:24:03,148 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:24:03,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-06 21:24:03,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2019-11-06 21:24:03,149 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 38 states. [2019-11-06 21:24:04,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:24:04,151 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-11-06 21:24:04,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-06 21:24:04,152 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2019-11-06 21:24:04,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:24:04,152 INFO L225 Difference]: With dead ends: 50 [2019-11-06 21:24:04,152 INFO L226 Difference]: Without dead ends: 47 [2019-11-06 21:24:04,153 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2019-11-06 21:24:04,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-06 21:24:04,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-06 21:24:04,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-06 21:24:04,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-11-06 21:24:04,158 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2019-11-06 21:24:04,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:24:04,158 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-11-06 21:24:04,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-06 21:24:04,158 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-11-06 21:24:04,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 21:24:04,159 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:24:04,159 INFO L410 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:24:04,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:04,363 INFO L410 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:24:04,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:24:04,363 INFO L82 PathProgramCache]: Analyzing trace with hash 94459568, now seen corresponding path program 35 times [2019-11-06 21:24:04,363 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:24:04,364 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111936423] [2019-11-06 21:24:04,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:24:04,372 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:24:04,372 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070555876] [2019-11-06 21:24:04,372 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:04,471 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-11-06 21:24:04,471 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:24:04,474 WARN L254 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 151 conjunts are in the unsatisfiable core [2019-11-06 21:24:04,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:24:05,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:24:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:24:05,295 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111936423] [2019-11-06 21:24:05,296 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:24:05,296 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070555876] [2019-11-06 21:24:05,296 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:24:05,296 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-11-06 21:24:05,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805391045] [2019-11-06 21:24:05,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-06 21:24:05,296 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:24:05,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-06 21:24:05,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2019-11-06 21:24:05,297 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 39 states. [2019-11-06 21:24:06,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:24:06,345 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-11-06 21:24:06,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-06 21:24:06,345 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2019-11-06 21:24:06,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:24:06,346 INFO L225 Difference]: With dead ends: 51 [2019-11-06 21:24:06,346 INFO L226 Difference]: Without dead ends: 48 [2019-11-06 21:24:06,346 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 21:24:06,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-06 21:24:06,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-06 21:24:06,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-06 21:24:06,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-11-06 21:24:06,350 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2019-11-06 21:24:06,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:24:06,351 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-11-06 21:24:06,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-06 21:24:06,351 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-11-06 21:24:06,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 21:24:06,351 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:24:06,351 INFO L410 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:24:06,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:06,555 INFO L410 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:24:06,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:24:06,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1366783161, now seen corresponding path program 36 times [2019-11-06 21:24:06,556 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:24:06,556 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945936453] [2019-11-06 21:24:06,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:24:06,565 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:24:06,565 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113937814] [2019-11-06 21:24:06,565 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:06,809 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-06 21:24:06,809 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:24:06,812 WARN L254 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 155 conjunts are in the unsatisfiable core [2019-11-06 21:24:06,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:24:07,579 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:24:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:24:07,619 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945936453] [2019-11-06 21:24:07,620 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:24:07,620 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113937814] [2019-11-06 21:24:07,620 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:24:07,620 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-11-06 21:24:07,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107686912] [2019-11-06 21:24:07,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-06 21:24:07,620 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:24:07,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-06 21:24:07,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 21:24:07,621 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 40 states. [2019-11-06 21:24:08,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:24:08,690 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-11-06 21:24:08,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-06 21:24:08,691 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2019-11-06 21:24:08,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:24:08,692 INFO L225 Difference]: With dead ends: 52 [2019-11-06 21:24:08,692 INFO L226 Difference]: Without dead ends: 49 [2019-11-06 21:24:08,693 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2019-11-06 21:24:08,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-06 21:24:08,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-11-06 21:24:08,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 21:24:08,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-11-06 21:24:08,699 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2019-11-06 21:24:08,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:24:08,699 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-11-06 21:24:08,699 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-06 21:24:08,699 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-11-06 21:24:08,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-06 21:24:08,699 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:24:08,700 INFO L410 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:24:08,903 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:08,903 INFO L410 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:24:08,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:24:08,904 INFO L82 PathProgramCache]: Analyzing trace with hash 579332496, now seen corresponding path program 37 times [2019-11-06 21:24:08,904 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:24:08,904 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819049638] [2019-11-06 21:24:08,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:24:08,913 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:24:08,914 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296122832] [2019-11-06 21:24:08,914 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:09,059 WARN L254 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 159 conjunts are in the unsatisfiable core [2019-11-06 21:24:09,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:24:10,044 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:24:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:24:10,083 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819049638] [2019-11-06 21:24:10,083 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:24:10,083 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296122832] [2019-11-06 21:24:10,083 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:24:10,083 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-11-06 21:24:10,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301831495] [2019-11-06 21:24:10,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-06 21:24:10,084 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:24:10,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-06 21:24:10,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2019-11-06 21:24:10,085 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 41 states. [2019-11-06 21:24:11,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:24:11,207 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-11-06 21:24:11,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-06 21:24:11,207 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2019-11-06 21:24:11,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:24:11,208 INFO L225 Difference]: With dead ends: 53 [2019-11-06 21:24:11,208 INFO L226 Difference]: Without dead ends: 50 [2019-11-06 21:24:11,209 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2019-11-06 21:24:11,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-06 21:24:11,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-06 21:24:11,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-06 21:24:11,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-11-06 21:24:11,214 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2019-11-06 21:24:11,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:24:11,215 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-11-06 21:24:11,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-06 21:24:11,215 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-11-06 21:24:11,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-06 21:24:11,215 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:24:11,215 INFO L410 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:24:11,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:11,419 INFO L410 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:24:11,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:24:11,419 INFO L82 PathProgramCache]: Analyzing trace with hash 779375719, now seen corresponding path program 38 times [2019-11-06 21:24:11,420 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:24:11,420 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435908464] [2019-11-06 21:24:11,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:24:11,429 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:24:11,430 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074823390] [2019-11-06 21:24:11,430 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:11,556 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:24:11,556 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:24:11,560 WARN L254 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 163 conjunts are in the unsatisfiable core [2019-11-06 21:24:11,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:24:12,427 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:24:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:24:12,475 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435908464] [2019-11-06 21:24:12,475 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:24:12,475 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074823390] [2019-11-06 21:24:12,475 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:24:12,475 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-11-06 21:24:12,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953973037] [2019-11-06 21:24:12,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-06 21:24:12,476 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:24:12,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-06 21:24:12,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2019-11-06 21:24:12,477 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 42 states. [2019-11-06 21:24:13,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:24:13,648 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-11-06 21:24:13,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-06 21:24:13,648 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 49 [2019-11-06 21:24:13,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:24:13,649 INFO L225 Difference]: With dead ends: 54 [2019-11-06 21:24:13,650 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 21:24:13,651 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2019-11-06 21:24:13,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 21:24:13,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-11-06 21:24:13,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 21:24:13,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-11-06 21:24:13,656 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2019-11-06 21:24:13,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:24:13,656 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-11-06 21:24:13,657 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-06 21:24:13,657 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-11-06 21:24:13,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 21:24:13,657 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:24:13,657 INFO L410 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:24:13,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:13,858 INFO L410 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:24:13,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:24:13,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1609218960, now seen corresponding path program 39 times [2019-11-06 21:24:13,859 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:24:13,859 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009614074] [2019-11-06 21:24:13,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:24:13,869 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:24:13,869 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833786964] [2019-11-06 21:24:13,869 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:15,219 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-11-06 21:24:15,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:24:15,223 WARN L254 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 167 conjunts are in the unsatisfiable core [2019-11-06 21:24:15,225 INFO L279 TraceCheckSpWp]: Computing forward predicates...