/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 --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/sqrt1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:48:03,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:48:03,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:48:03,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:48:03,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:48:03,255 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:48:03,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:48:03,259 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:48:03,260 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:48:03,261 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:48:03,263 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:48:03,264 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:48:03,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:48:03,265 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:48:03,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:48:03,268 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:48:03,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:48:03,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:48:03,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:48:03,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:48:03,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:48:03,277 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:48:03,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:48:03,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:48:03,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:48:03,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:48:03,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:48:03,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:48:03,299 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 [2020-07-19 21:48:03,332 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:48:03,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:48:03,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:48:03,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:48:03,334 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:48:03,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:48:03,335 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:48:03,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:48:03,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:48:03,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:48:03,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:48:03,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:48:03,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:48:03,338 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:48:03,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:48:03,338 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:48:03,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:48:03,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:48:03,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:48:03,339 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:48:03,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:48:03,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:48:03,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:48:03,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:48:03,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:48:03,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:48:03,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:48:03,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:48:03,341 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:48:03,341 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:48:03,635 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:48:03,656 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:48:03,659 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:48:03,662 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:48:03,663 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:48:03,663 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/sqrt1.c [2020-07-19 21:48:03,746 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/220b8ec82/b716464f5e444cc8a26e2a6e88dc0c64/FLAG367eff9b7 [2020-07-19 21:48:04,228 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:48:04,229 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/sqrt1.c [2020-07-19 21:48:04,236 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/220b8ec82/b716464f5e444cc8a26e2a6e88dc0c64/FLAG367eff9b7 [2020-07-19 21:48:04,598 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/220b8ec82/b716464f5e444cc8a26e2a6e88dc0c64 [2020-07-19 21:48:04,608 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:48:04,610 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:48:04,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:48:04,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:48:04,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:48:04,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:48:04" (1/1) ... [2020-07-19 21:48:04,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5444b2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:04, skipping insertion in model container [2020-07-19 21:48:04,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:48:04" (1/1) ... [2020-07-19 21:48:04,626 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:48:04,645 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:48:04,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:48:04,855 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:48:04,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:48:04,890 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:48:04,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:04 WrapperNode [2020-07-19 21:48:04,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:48:04,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:48:04,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:48:04,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:48:04,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:04" (1/1) ... [2020-07-19 21:48:04,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:04" (1/1) ... [2020-07-19 21:48:04,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:04" (1/1) ... [2020-07-19 21:48:04,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:04" (1/1) ... [2020-07-19 21:48:04,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:04" (1/1) ... [2020-07-19 21:48:05,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:04" (1/1) ... [2020-07-19 21:48:05,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:04" (1/1) ... [2020-07-19 21:48:05,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:48:05,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:48:05,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:48:05,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:48:05,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:04" (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 [2020-07-19 21:48:05,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:48:05,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:48:05,090 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 21:48:05,090 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 21:48:05,090 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:48:05,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:48:05,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 21:48:05,091 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 21:48:05,091 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 21:48:05,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 21:48:05,092 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:48:05,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:48:05,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:48:05,286 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:48:05,287 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-19 21:48:05,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:48:05 BoogieIcfgContainer [2020-07-19 21:48:05,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:48:05,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:48:05,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:48:05,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:48:05,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:48:04" (1/3) ... [2020-07-19 21:48:05,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14098d61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:48:05, skipping insertion in model container [2020-07-19 21:48:05,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:48:04" (2/3) ... [2020-07-19 21:48:05,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14098d61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:48:05, skipping insertion in model container [2020-07-19 21:48:05,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:48:05" (3/3) ... [2020-07-19 21:48:05,301 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt1.c [2020-07-19 21:48:05,314 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:48:05,323 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:48:05,341 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:48:05,378 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:48:05,378 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:48:05,378 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:48:05,379 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:48:05,379 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:48:05,379 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:48:05,379 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:48:05,379 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:48:05,414 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-19 21:48:05,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-19 21:48:05,434 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:05,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:05,436 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:05,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:05,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1080899301, now seen corresponding path program 1 times [2020-07-19 21:48:05,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:05,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857742535] [2020-07-19 21:48:05,457 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:05,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:48:05,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857742535] [2020-07-19 21:48:05,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:48:05,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-19 21:48:05,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141908558] [2020-07-19 21:48:05,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-19 21:48:05,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:05,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-19 21:48:05,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-19 21:48:05,608 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-07-19 21:48:05,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:05,631 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2020-07-19 21:48:05,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-19 21:48:05,633 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-19 21:48:05,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:05,642 INFO L225 Difference]: With dead ends: 43 [2020-07-19 21:48:05,642 INFO L226 Difference]: Without dead ends: 19 [2020-07-19 21:48:05,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-19 21:48:05,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-19 21:48:05,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-19 21:48:05,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-19 21:48:05,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-07-19 21:48:05,695 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2020-07-19 21:48:05,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:05,696 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-07-19 21:48:05,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-19 21:48:05,697 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-07-19 21:48:05,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-19 21:48:05,697 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:05,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:05,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:48:05,698 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:05,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:05,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1082567597, now seen corresponding path program 1 times [2020-07-19 21:48:05,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:05,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377590210] [2020-07-19 21:48:05,700 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:48:05,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377590210] [2020-07-19 21:48:05,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:48:05,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:48:05,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051977376] [2020-07-19 21:48:05,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:48:05,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:05,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:48:05,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:48:05,864 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 5 states. [2020-07-19 21:48:05,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:05,963 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-07-19 21:48:05,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 21:48:05,964 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-19 21:48:05,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:05,966 INFO L225 Difference]: With dead ends: 25 [2020-07-19 21:48:05,966 INFO L226 Difference]: Without dead ends: 23 [2020-07-19 21:48:05,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:48:05,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-19 21:48:05,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-19 21:48:05,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-19 21:48:05,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-07-19 21:48:05,990 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2020-07-19 21:48:05,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:05,991 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-07-19 21:48:05,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:48:05,991 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-07-19 21:48:05,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-19 21:48:05,994 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:05,994 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:05,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 21:48:05,995 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:05,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:05,996 INFO L82 PathProgramCache]: Analyzing trace with hash 725386554, now seen corresponding path program 1 times [2020-07-19 21:48:05,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:05,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215035633] [2020-07-19 21:48:05,997 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:06,018 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:06,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478968814] [2020-07-19 21:48:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:06,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-19 21:48:06,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:48:06,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215035633] [2020-07-19 21:48:06,123 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:06,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478968814] [2020-07-19 21:48:06,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:48:06,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:48:06,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482527122] [2020-07-19 21:48:06,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:48:06,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:06,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:48:06,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:48:06,126 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-07-19 21:48:06,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:06,204 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-07-19 21:48:06,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:48:06,205 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-19 21:48:06,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:06,206 INFO L225 Difference]: With dead ends: 37 [2020-07-19 21:48:06,207 INFO L226 Difference]: Without dead ends: 35 [2020-07-19 21:48:06,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:48:06,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-19 21:48:06,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-19 21:48:06,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-19 21:48:06,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-07-19 21:48:06,221 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 15 [2020-07-19 21:48:06,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:06,221 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-07-19 21:48:06,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:48:06,221 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-07-19 21:48:06,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-19 21:48:06,222 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:06,222 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:06,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-19 21:48:06,438 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:06,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:06,439 INFO L82 PathProgramCache]: Analyzing trace with hash -436292723, now seen corresponding path program 1 times [2020-07-19 21:48:06,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:06,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735756007] [2020-07-19 21:48:06,440 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:06,453 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:06,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920279416] [2020-07-19 21:48:06,454 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:06,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-19 21:48:06,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:48:06,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735756007] [2020-07-19 21:48:06,536 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:06,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920279416] [2020-07-19 21:48:06,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:48:06,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:48:06,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126951377] [2020-07-19 21:48:06,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:48:06,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:06,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:48:06,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:48:06,539 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 5 states. [2020-07-19 21:48:06,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:06,608 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-07-19 21:48:06,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:48:06,609 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-19 21:48:06,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:06,611 INFO L225 Difference]: With dead ends: 41 [2020-07-19 21:48:06,611 INFO L226 Difference]: Without dead ends: 36 [2020-07-19 21:48:06,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:48:06,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-19 21:48:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-19 21:48:06,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-19 21:48:06,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-07-19 21:48:06,625 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 20 [2020-07-19 21:48:06,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:06,625 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-07-19 21:48:06,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:48:06,626 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-07-19 21:48:06,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-19 21:48:06,627 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:06,628 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:06,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:06,842 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:06,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:06,843 INFO L82 PathProgramCache]: Analyzing trace with hash -2135406385, now seen corresponding path program 1 times [2020-07-19 21:48:06,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:06,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172948685] [2020-07-19 21:48:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:06,854 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:06,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223717154] [2020-07-19 21:48:06,854 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:06,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-19 21:48:06,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:06,963 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-19 21:48:06,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172948685] [2020-07-19 21:48:06,964 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:06,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223717154] [2020-07-19 21:48:06,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:06,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-19 21:48:06,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773783393] [2020-07-19 21:48:06,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 21:48:06,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:06,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 21:48:06,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:48:06,967 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 6 states. [2020-07-19 21:48:07,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:07,073 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-07-19 21:48:07,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 21:48:07,073 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-07-19 21:48:07,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:07,075 INFO L225 Difference]: With dead ends: 54 [2020-07-19 21:48:07,075 INFO L226 Difference]: Without dead ends: 52 [2020-07-19 21:48:07,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:48:07,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-19 21:48:07,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-07-19 21:48:07,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-19 21:48:07,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-07-19 21:48:07,089 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 32 [2020-07-19 21:48:07,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:07,089 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-07-19 21:48:07,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 21:48:07,090 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-07-19 21:48:07,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-19 21:48:07,091 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:07,091 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:07,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:07,303 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:07,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:07,304 INFO L82 PathProgramCache]: Analyzing trace with hash -2069437160, now seen corresponding path program 2 times [2020-07-19 21:48:07,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:07,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588654869] [2020-07-19 21:48:07,306 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:07,324 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:07,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261825404] [2020-07-19 21:48:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:07,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-19 21:48:07,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-19 21:48:07,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588654869] [2020-07-19 21:48:07,437 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:07,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261825404] [2020-07-19 21:48:07,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:07,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-19 21:48:07,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897069707] [2020-07-19 21:48:07,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 21:48:07,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:07,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 21:48:07,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:48:07,449 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 6 states. [2020-07-19 21:48:07,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:07,577 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-07-19 21:48:07,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 21:48:07,579 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-07-19 21:48:07,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:07,580 INFO L225 Difference]: With dead ends: 58 [2020-07-19 21:48:07,580 INFO L226 Difference]: Without dead ends: 53 [2020-07-19 21:48:07,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:48:07,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-19 21:48:07,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-07-19 21:48:07,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-19 21:48:07,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-07-19 21:48:07,600 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 37 [2020-07-19 21:48:07,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:07,602 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-07-19 21:48:07,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 21:48:07,602 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-07-19 21:48:07,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-19 21:48:07,605 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:07,605 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:07,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:07,814 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:07,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:07,814 INFO L82 PathProgramCache]: Analyzing trace with hash -121404966, now seen corresponding path program 3 times [2020-07-19 21:48:07,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:07,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504478470] [2020-07-19 21:48:07,815 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:07,821 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:07,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288432988] [2020-07-19 21:48:07,822 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:07,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-19 21:48:07,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-19 21:48:07,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504478470] [2020-07-19 21:48:07,931 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:07,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288432988] [2020-07-19 21:48:07,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:07,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-19 21:48:07,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075925085] [2020-07-19 21:48:07,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 21:48:07,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:07,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 21:48:07,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:48:07,934 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 7 states. [2020-07-19 21:48:08,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:08,074 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-07-19 21:48:08,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:48:08,074 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-07-19 21:48:08,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:08,076 INFO L225 Difference]: With dead ends: 71 [2020-07-19 21:48:08,076 INFO L226 Difference]: Without dead ends: 69 [2020-07-19 21:48:08,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:48:08,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-19 21:48:08,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-07-19 21:48:08,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-19 21:48:08,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-07-19 21:48:08,089 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 49 [2020-07-19 21:48:08,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:08,090 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-07-19 21:48:08,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 21:48:08,090 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-07-19 21:48:08,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-19 21:48:08,091 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:08,092 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:08,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-19 21:48:08,306 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:08,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:08,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1300456723, now seen corresponding path program 4 times [2020-07-19 21:48:08,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:08,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781674138] [2020-07-19 21:48:08,309 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:08,316 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:08,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930992021] [2020-07-19 21:48:08,317 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:08,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-19 21:48:08,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-07-19 21:48:08,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781674138] [2020-07-19 21:48:08,441 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:08,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930992021] [2020-07-19 21:48:08,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:08,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-19 21:48:08,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519878362] [2020-07-19 21:48:08,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 21:48:08,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:08,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 21:48:08,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:48:08,444 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 7 states. [2020-07-19 21:48:08,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:08,564 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2020-07-19 21:48:08,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:48:08,565 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-07-19 21:48:08,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:08,566 INFO L225 Difference]: With dead ends: 75 [2020-07-19 21:48:08,566 INFO L226 Difference]: Without dead ends: 70 [2020-07-19 21:48:08,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:48:08,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-19 21:48:08,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-07-19 21:48:08,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-19 21:48:08,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2020-07-19 21:48:08,580 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 54 [2020-07-19 21:48:08,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:08,580 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2020-07-19 21:48:08,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 21:48:08,581 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2020-07-19 21:48:08,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-19 21:48:08,582 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:08,582 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:08,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:08,798 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:08,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:08,799 INFO L82 PathProgramCache]: Analyzing trace with hash 632692783, now seen corresponding path program 5 times [2020-07-19 21:48:08,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:08,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709807985] [2020-07-19 21:48:08,801 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:08,808 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:08,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898713125] [2020-07-19 21:48:08,809 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:08,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-19 21:48:08,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-07-19 21:48:09,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709807985] [2020-07-19 21:48:09,001 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:09,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898713125] [2020-07-19 21:48:09,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:09,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-19 21:48:09,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402125620] [2020-07-19 21:48:09,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 21:48:09,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:09,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 21:48:09,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:48:09,006 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand 8 states. [2020-07-19 21:48:09,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:09,195 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2020-07-19 21:48:09,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 21:48:09,196 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-07-19 21:48:09,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:09,197 INFO L225 Difference]: With dead ends: 88 [2020-07-19 21:48:09,198 INFO L226 Difference]: Without dead ends: 86 [2020-07-19 21:48:09,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:48:09,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-19 21:48:09,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-07-19 21:48:09,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-19 21:48:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-07-19 21:48:09,225 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 66 [2020-07-19 21:48:09,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:09,226 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-07-19 21:48:09,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 21:48:09,226 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-07-19 21:48:09,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-07-19 21:48:09,230 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:09,230 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:09,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:09,438 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:09,439 INFO L82 PathProgramCache]: Analyzing trace with hash -74929736, now seen corresponding path program 6 times [2020-07-19 21:48:09,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:09,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856722275] [2020-07-19 21:48:09,441 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:09,456 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:09,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832824505] [2020-07-19 21:48:09,458 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:09,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-19 21:48:09,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-19 21:48:09,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856722275] [2020-07-19 21:48:09,597 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:09,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832824505] [2020-07-19 21:48:09,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:09,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-19 21:48:09,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398792070] [2020-07-19 21:48:09,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 21:48:09,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:09,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 21:48:09,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:48:09,599 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 8 states. [2020-07-19 21:48:09,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:09,774 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2020-07-19 21:48:09,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 21:48:09,775 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-07-19 21:48:09,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:09,776 INFO L225 Difference]: With dead ends: 92 [2020-07-19 21:48:09,777 INFO L226 Difference]: Without dead ends: 87 [2020-07-19 21:48:09,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:48:09,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-19 21:48:09,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-07-19 21:48:09,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-19 21:48:09,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2020-07-19 21:48:09,789 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 71 [2020-07-19 21:48:09,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:09,789 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2020-07-19 21:48:09,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 21:48:09,790 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2020-07-19 21:48:09,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-19 21:48:09,791 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:09,791 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:10,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-19 21:48:10,007 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:10,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:10,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1996269958, now seen corresponding path program 7 times [2020-07-19 21:48:10,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:10,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761060026] [2020-07-19 21:48:10,009 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:10,016 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:10,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [630611161] [2020-07-19 21:48:10,017 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:10,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-19 21:48:10,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:10,196 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 26 proven. 42 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-07-19 21:48:10,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761060026] [2020-07-19 21:48:10,197 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:10,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630611161] [2020-07-19 21:48:10,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:10,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-19 21:48:10,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905312550] [2020-07-19 21:48:10,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 21:48:10,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:10,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 21:48:10,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:48:10,216 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand 9 states. [2020-07-19 21:48:10,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:10,421 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2020-07-19 21:48:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 21:48:10,422 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-07-19 21:48:10,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:10,423 INFO L225 Difference]: With dead ends: 105 [2020-07-19 21:48:10,424 INFO L226 Difference]: Without dead ends: 103 [2020-07-19 21:48:10,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:48:10,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-19 21:48:10,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-07-19 21:48:10,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-19 21:48:10,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2020-07-19 21:48:10,437 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 83 [2020-07-19 21:48:10,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:10,437 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2020-07-19 21:48:10,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 21:48:10,438 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2020-07-19 21:48:10,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-07-19 21:48:10,439 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:10,439 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:10,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:10,655 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:10,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:10,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1174973005, now seen corresponding path program 8 times [2020-07-19 21:48:10,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:10,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636913577] [2020-07-19 21:48:10,657 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:10,663 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:10,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049964837] [2020-07-19 21:48:10,664 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:10,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-19 21:48:10,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 46 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-19 21:48:10,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636913577] [2020-07-19 21:48:10,822 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:10,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049964837] [2020-07-19 21:48:10,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:10,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-19 21:48:10,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537389140] [2020-07-19 21:48:10,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 21:48:10,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:10,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 21:48:10,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:48:10,824 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand 9 states. [2020-07-19 21:48:11,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:11,020 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2020-07-19 21:48:11,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 21:48:11,021 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-07-19 21:48:11,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:11,022 INFO L225 Difference]: With dead ends: 109 [2020-07-19 21:48:11,022 INFO L226 Difference]: Without dead ends: 104 [2020-07-19 21:48:11,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:48:11,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-19 21:48:11,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-07-19 21:48:11,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-19 21:48:11,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2020-07-19 21:48:11,046 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 88 [2020-07-19 21:48:11,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:11,049 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2020-07-19 21:48:11,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 21:48:11,049 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2020-07-19 21:48:11,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-19 21:48:11,052 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:11,052 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:11,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:11,254 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:11,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:11,255 INFO L82 PathProgramCache]: Analyzing trace with hash -440000625, now seen corresponding path program 9 times [2020-07-19 21:48:11,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:11,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608138608] [2020-07-19 21:48:11,256 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:11,263 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:11,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210278899] [2020-07-19 21:48:11,264 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:11,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-19 21:48:11,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 32 proven. 65 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-07-19 21:48:11,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608138608] [2020-07-19 21:48:11,465 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:11,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210278899] [2020-07-19 21:48:11,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:11,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-19 21:48:11,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474737459] [2020-07-19 21:48:11,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 21:48:11,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:11,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 21:48:11,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:48:11,467 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand 10 states. [2020-07-19 21:48:11,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:11,760 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2020-07-19 21:48:11,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 21:48:11,760 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 100 [2020-07-19 21:48:11,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:11,762 INFO L225 Difference]: With dead ends: 122 [2020-07-19 21:48:11,762 INFO L226 Difference]: Without dead ends: 120 [2020-07-19 21:48:11,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:48:11,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-19 21:48:11,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-07-19 21:48:11,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-07-19 21:48:11,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 128 transitions. [2020-07-19 21:48:11,773 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 128 transitions. Word has length 100 [2020-07-19 21:48:11,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:11,774 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 128 transitions. [2020-07-19 21:48:11,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 21:48:11,774 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 128 transitions. [2020-07-19 21:48:11,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-07-19 21:48:11,775 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:11,776 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:11,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-19 21:48:11,990 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:11,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:11,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1267644840, now seen corresponding path program 10 times [2020-07-19 21:48:11,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:11,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276922659] [2020-07-19 21:48:11,992 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:11,999 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:12,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256346127] [2020-07-19 21:48:12,000 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:12,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-19 21:48:12,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 34 proven. 70 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-07-19 21:48:12,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276922659] [2020-07-19 21:48:12,193 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:12,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256346127] [2020-07-19 21:48:12,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:12,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-19 21:48:12,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095832719] [2020-07-19 21:48:12,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 21:48:12,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:12,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 21:48:12,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:48:12,195 INFO L87 Difference]: Start difference. First operand 119 states and 128 transitions. Second operand 10 states. [2020-07-19 21:48:12,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:12,444 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2020-07-19 21:48:12,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 21:48:12,445 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 105 [2020-07-19 21:48:12,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:12,446 INFO L225 Difference]: With dead ends: 126 [2020-07-19 21:48:12,447 INFO L226 Difference]: Without dead ends: 121 [2020-07-19 21:48:12,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:48:12,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-07-19 21:48:12,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-07-19 21:48:12,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-19 21:48:12,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2020-07-19 21:48:12,461 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 105 [2020-07-19 21:48:12,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:12,461 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2020-07-19 21:48:12,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 21:48:12,462 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2020-07-19 21:48:12,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-19 21:48:12,463 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:12,463 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:12,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-19 21:48:12,664 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:12,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:12,665 INFO L82 PathProgramCache]: Analyzing trace with hash 264635162, now seen corresponding path program 11 times [2020-07-19 21:48:12,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:12,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249155575] [2020-07-19 21:48:12,666 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:12,673 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:12,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60607624] [2020-07-19 21:48:12,674 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:12,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 45 conjunts are in the unsatisfiable core [2020-07-19 21:48:12,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 38 proven. 93 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-07-19 21:48:12,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249155575] [2020-07-19 21:48:12,961 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:12,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60607624] [2020-07-19 21:48:12,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:12,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-19 21:48:12,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434280216] [2020-07-19 21:48:12,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 21:48:12,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:12,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 21:48:12,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:48:12,963 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 11 states. [2020-07-19 21:48:13,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:13,342 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2020-07-19 21:48:13,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 21:48:13,343 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 117 [2020-07-19 21:48:13,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:13,345 INFO L225 Difference]: With dead ends: 139 [2020-07-19 21:48:13,345 INFO L226 Difference]: Without dead ends: 137 [2020-07-19 21:48:13,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:48:13,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-19 21:48:13,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-07-19 21:48:13,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-19 21:48:13,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 145 transitions. [2020-07-19 21:48:13,357 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 145 transitions. Word has length 117 [2020-07-19 21:48:13,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:13,358 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 145 transitions. [2020-07-19 21:48:13,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 21:48:13,358 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 145 transitions. [2020-07-19 21:48:13,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-19 21:48:13,359 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:13,360 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:13,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-19 21:48:13,572 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:13,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:13,573 INFO L82 PathProgramCache]: Analyzing trace with hash 991486381, now seen corresponding path program 12 times [2020-07-19 21:48:13,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:13,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520088218] [2020-07-19 21:48:13,574 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:13,581 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:13,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42603858] [2020-07-19 21:48:13,582 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:13,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-19 21:48:13,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:13,799 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 40 proven. 99 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2020-07-19 21:48:13,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520088218] [2020-07-19 21:48:13,799 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:13,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42603858] [2020-07-19 21:48:13,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:13,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-19 21:48:13,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885571991] [2020-07-19 21:48:13,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 21:48:13,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:13,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 21:48:13,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:48:13,802 INFO L87 Difference]: Start difference. First operand 136 states and 145 transitions. Second operand 11 states. [2020-07-19 21:48:14,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:14,106 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2020-07-19 21:48:14,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 21:48:14,107 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 122 [2020-07-19 21:48:14,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:14,108 INFO L225 Difference]: With dead ends: 143 [2020-07-19 21:48:14,109 INFO L226 Difference]: Without dead ends: 138 [2020-07-19 21:48:14,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:48:14,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-19 21:48:14,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-07-19 21:48:14,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-19 21:48:14,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-07-19 21:48:14,124 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 122 [2020-07-19 21:48:14,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:14,125 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-07-19 21:48:14,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 21:48:14,125 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-07-19 21:48:14,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-07-19 21:48:14,127 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:14,127 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:14,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:14,341 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:14,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:14,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1516127983, now seen corresponding path program 13 times [2020-07-19 21:48:14,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:14,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798256705] [2020-07-19 21:48:14,343 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:14,349 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:14,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812952557] [2020-07-19 21:48:14,350 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:14,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-19 21:48:14,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:14,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 44 proven. 126 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2020-07-19 21:48:14,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798256705] [2020-07-19 21:48:14,665 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:14,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812952557] [2020-07-19 21:48:14,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:14,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-19 21:48:14,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087364419] [2020-07-19 21:48:14,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 21:48:14,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:14,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 21:48:14,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:48:14,671 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 12 states. [2020-07-19 21:48:15,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:15,105 INFO L93 Difference]: Finished difference Result 156 states and 165 transitions. [2020-07-19 21:48:15,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 21:48:15,106 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 134 [2020-07-19 21:48:15,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:15,108 INFO L225 Difference]: With dead ends: 156 [2020-07-19 21:48:15,108 INFO L226 Difference]: Without dead ends: 154 [2020-07-19 21:48:15,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-07-19 21:48:15,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-07-19 21:48:15,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-07-19 21:48:15,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-07-19 21:48:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 162 transitions. [2020-07-19 21:48:15,120 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 162 transitions. Word has length 134 [2020-07-19 21:48:15,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:15,121 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 162 transitions. [2020-07-19 21:48:15,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 21:48:15,121 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 162 transitions. [2020-07-19 21:48:15,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-07-19 21:48:15,123 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:15,123 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:15,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-19 21:48:15,337 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:15,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:15,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1884636424, now seen corresponding path program 14 times [2020-07-19 21:48:15,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:15,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752847265] [2020-07-19 21:48:15,339 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:15,346 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:15,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114076278] [2020-07-19 21:48:15,346 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:15,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-19 21:48:15,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 46 proven. 133 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-07-19 21:48:15,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752847265] [2020-07-19 21:48:15,608 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:15,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114076278] [2020-07-19 21:48:15,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:15,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-19 21:48:15,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466257417] [2020-07-19 21:48:15,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 21:48:15,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:15,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 21:48:15,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:48:15,610 INFO L87 Difference]: Start difference. First operand 153 states and 162 transitions. Second operand 12 states. [2020-07-19 21:48:16,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:16,039 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2020-07-19 21:48:16,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 21:48:16,040 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 139 [2020-07-19 21:48:16,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:16,042 INFO L225 Difference]: With dead ends: 160 [2020-07-19 21:48:16,042 INFO L226 Difference]: Without dead ends: 155 [2020-07-19 21:48:16,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-07-19 21:48:16,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-19 21:48:16,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-07-19 21:48:16,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-07-19 21:48:16,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 160 transitions. [2020-07-19 21:48:16,052 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 160 transitions. Word has length 139 [2020-07-19 21:48:16,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:16,053 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 160 transitions. [2020-07-19 21:48:16,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 21:48:16,053 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 160 transitions. [2020-07-19 21:48:16,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-07-19 21:48:16,055 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:16,055 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:16,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-19 21:48:16,268 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:16,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:16,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1314228154, now seen corresponding path program 15 times [2020-07-19 21:48:16,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:16,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503032389] [2020-07-19 21:48:16,270 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:16,275 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:16,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373126735] [2020-07-19 21:48:16,276 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:16,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-19 21:48:16,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1414 backedges. 50 proven. 164 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-07-19 21:48:16,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503032389] [2020-07-19 21:48:16,634 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:16,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373126735] [2020-07-19 21:48:16,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:16,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-19 21:48:16,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649456079] [2020-07-19 21:48:16,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 21:48:16,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:16,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 21:48:16,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-07-19 21:48:16,636 INFO L87 Difference]: Start difference. First operand 155 states and 160 transitions. Second operand 13 states. [2020-07-19 21:48:17,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:17,185 INFO L93 Difference]: Finished difference Result 173 states and 182 transitions. [2020-07-19 21:48:17,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 21:48:17,186 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 151 [2020-07-19 21:48:17,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:17,199 INFO L225 Difference]: With dead ends: 173 [2020-07-19 21:48:17,199 INFO L226 Difference]: Without dead ends: 171 [2020-07-19 21:48:17,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:48:17,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-07-19 21:48:17,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2020-07-19 21:48:17,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-07-19 21:48:17,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 179 transitions. [2020-07-19 21:48:17,210 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 179 transitions. Word has length 151 [2020-07-19 21:48:17,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:17,211 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 179 transitions. [2020-07-19 21:48:17,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 21:48:17,211 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 179 transitions. [2020-07-19 21:48:17,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-07-19 21:48:17,213 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:17,214 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:17,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:17,428 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:17,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:17,429 INFO L82 PathProgramCache]: Analyzing trace with hash 245580045, now seen corresponding path program 16 times [2020-07-19 21:48:17,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:17,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247732196] [2020-07-19 21:48:17,430 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:17,436 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:17,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693305223] [2020-07-19 21:48:17,437 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:17,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-19 21:48:17,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1524 backedges. 52 proven. 172 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2020-07-19 21:48:17,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247732196] [2020-07-19 21:48:17,754 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:17,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693305223] [2020-07-19 21:48:17,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:17,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-19 21:48:17,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737717702] [2020-07-19 21:48:17,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 21:48:17,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:17,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 21:48:17,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-07-19 21:48:17,755 INFO L87 Difference]: Start difference. First operand 170 states and 179 transitions. Second operand 13 states. [2020-07-19 21:48:18,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:18,261 INFO L93 Difference]: Finished difference Result 177 states and 185 transitions. [2020-07-19 21:48:18,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 21:48:18,262 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 156 [2020-07-19 21:48:18,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:18,264 INFO L225 Difference]: With dead ends: 177 [2020-07-19 21:48:18,264 INFO L226 Difference]: Without dead ends: 172 [2020-07-19 21:48:18,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:48:18,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-07-19 21:48:18,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-07-19 21:48:18,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-07-19 21:48:18,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 177 transitions. [2020-07-19 21:48:18,276 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 177 transitions. Word has length 156 [2020-07-19 21:48:18,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:18,277 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 177 transitions. [2020-07-19 21:48:18,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 21:48:18,277 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 177 transitions. [2020-07-19 21:48:18,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-19 21:48:18,279 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:18,279 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:18,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:18,495 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:18,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:18,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1064605263, now seen corresponding path program 17 times [2020-07-19 21:48:18,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:18,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434471066] [2020-07-19 21:48:18,497 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:18,503 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:18,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708065192] [2020-07-19 21:48:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:18,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-19 21:48:18,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1775 backedges. 56 proven. 207 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2020-07-19 21:48:18,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434471066] [2020-07-19 21:48:18,931 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:18,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708065192] [2020-07-19 21:48:18,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:18,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-19 21:48:18,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936724226] [2020-07-19 21:48:18,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 21:48:18,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:18,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 21:48:18,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:48:18,933 INFO L87 Difference]: Start difference. First operand 172 states and 177 transitions. Second operand 14 states. [2020-07-19 21:48:19,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:19,569 INFO L93 Difference]: Finished difference Result 190 states and 199 transitions. [2020-07-19 21:48:19,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 21:48:19,570 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 168 [2020-07-19 21:48:19,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:19,571 INFO L225 Difference]: With dead ends: 190 [2020-07-19 21:48:19,571 INFO L226 Difference]: Without dead ends: 188 [2020-07-19 21:48:19,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-07-19 21:48:19,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-07-19 21:48:19,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2020-07-19 21:48:19,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-07-19 21:48:19,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 196 transitions. [2020-07-19 21:48:19,584 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 196 transitions. Word has length 168 [2020-07-19 21:48:19,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:19,584 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 196 transitions. [2020-07-19 21:48:19,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 21:48:19,585 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 196 transitions. [2020-07-19 21:48:19,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-07-19 21:48:19,587 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:19,588 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:19,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:19,801 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:19,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:19,801 INFO L82 PathProgramCache]: Analyzing trace with hash -620820584, now seen corresponding path program 18 times [2020-07-19 21:48:19,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:19,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177000988] [2020-07-19 21:48:19,802 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:19,814 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:19,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208859019] [2020-07-19 21:48:19,814 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:19,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 43 conjunts are in the unsatisfiable core [2020-07-19 21:48:19,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1898 backedges. 58 proven. 216 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2020-07-19 21:48:20,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177000988] [2020-07-19 21:48:20,246 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:20,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208859019] [2020-07-19 21:48:20,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:20,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-19 21:48:20,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505640990] [2020-07-19 21:48:20,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 21:48:20,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:20,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 21:48:20,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:48:20,248 INFO L87 Difference]: Start difference. First operand 187 states and 196 transitions. Second operand 14 states. [2020-07-19 21:48:20,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:20,860 INFO L93 Difference]: Finished difference Result 194 states and 202 transitions. [2020-07-19 21:48:20,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 21:48:20,863 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 173 [2020-07-19 21:48:20,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:20,864 INFO L225 Difference]: With dead ends: 194 [2020-07-19 21:48:20,864 INFO L226 Difference]: Without dead ends: 189 [2020-07-19 21:48:20,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-07-19 21:48:20,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-07-19 21:48:20,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2020-07-19 21:48:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-07-19 21:48:20,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 194 transitions. [2020-07-19 21:48:20,883 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 194 transitions. Word has length 173 [2020-07-19 21:48:20,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:20,884 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 194 transitions. [2020-07-19 21:48:20,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 21:48:20,884 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 194 transitions. [2020-07-19 21:48:20,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-07-19 21:48:20,885 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:20,886 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:21,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-19 21:48:21,098 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:21,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:21,099 INFO L82 PathProgramCache]: Analyzing trace with hash 863757402, now seen corresponding path program 19 times [2020-07-19 21:48:21,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:21,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954574592] [2020-07-19 21:48:21,100 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:21,107 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:21,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870453317] [2020-07-19 21:48:21,107 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:21,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 69 conjunts are in the unsatisfiable core [2020-07-19 21:48:21,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2177 backedges. 62 proven. 255 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-19 21:48:21,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954574592] [2020-07-19 21:48:21,652 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:21,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870453317] [2020-07-19 21:48:21,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:21,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-19 21:48:21,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036382390] [2020-07-19 21:48:21,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 21:48:21,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:21,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 21:48:21,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-07-19 21:48:21,653 INFO L87 Difference]: Start difference. First operand 189 states and 194 transitions. Second operand 15 states. [2020-07-19 21:48:22,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:22,522 INFO L93 Difference]: Finished difference Result 207 states and 216 transitions. [2020-07-19 21:48:22,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 21:48:22,523 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 185 [2020-07-19 21:48:22,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:22,525 INFO L225 Difference]: With dead ends: 207 [2020-07-19 21:48:22,525 INFO L226 Difference]: Without dead ends: 205 [2020-07-19 21:48:22,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:48:22,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-07-19 21:48:22,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2020-07-19 21:48:22,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-19 21:48:22,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 213 transitions. [2020-07-19 21:48:22,541 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 213 transitions. Word has length 185 [2020-07-19 21:48:22,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:22,543 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 213 transitions. [2020-07-19 21:48:22,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 21:48:22,543 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 213 transitions. [2020-07-19 21:48:22,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-19 21:48:22,544 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:22,545 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:22,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-07-19 21:48:22,758 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:22,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:22,759 INFO L82 PathProgramCache]: Analyzing trace with hash -2145531795, now seen corresponding path program 20 times [2020-07-19 21:48:22,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:22,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92215823] [2020-07-19 21:48:22,760 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:22,768 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:22,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279581601] [2020-07-19 21:48:22,768 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:22,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-19 21:48:22,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2313 backedges. 64 proven. 265 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2020-07-19 21:48:23,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92215823] [2020-07-19 21:48:23,257 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:23,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279581601] [2020-07-19 21:48:23,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:23,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-19 21:48:23,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737951440] [2020-07-19 21:48:23,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 21:48:23,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:23,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 21:48:23,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-07-19 21:48:23,259 INFO L87 Difference]: Start difference. First operand 204 states and 213 transitions. Second operand 15 states. [2020-07-19 21:48:24,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:24,050 INFO L93 Difference]: Finished difference Result 211 states and 219 transitions. [2020-07-19 21:48:24,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 21:48:24,052 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 190 [2020-07-19 21:48:24,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:24,055 INFO L225 Difference]: With dead ends: 211 [2020-07-19 21:48:24,055 INFO L226 Difference]: Without dead ends: 206 [2020-07-19 21:48:24,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:48:24,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-07-19 21:48:24,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-07-19 21:48:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-19 21:48:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 211 transitions. [2020-07-19 21:48:24,067 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 211 transitions. Word has length 190 [2020-07-19 21:48:24,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:24,067 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 211 transitions. [2020-07-19 21:48:24,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 21:48:24,067 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 211 transitions. [2020-07-19 21:48:24,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-07-19 21:48:24,069 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:24,069 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:24,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:24,276 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:24,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:24,277 INFO L82 PathProgramCache]: Analyzing trace with hash -746648145, now seen corresponding path program 21 times [2020-07-19 21:48:24,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:24,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275792966] [2020-07-19 21:48:24,277 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:24,284 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:24,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506939299] [2020-07-19 21:48:24,285 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:24,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 75 conjunts are in the unsatisfiable core [2020-07-19 21:48:24,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2620 backedges. 68 proven. 308 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2020-07-19 21:48:25,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275792966] [2020-07-19 21:48:25,000 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:25,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506939299] [2020-07-19 21:48:25,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:25,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-07-19 21:48:25,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385078897] [2020-07-19 21:48:25,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 21:48:25,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:25,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 21:48:25,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:48:25,002 INFO L87 Difference]: Start difference. First operand 206 states and 211 transitions. Second operand 16 states. [2020-07-19 21:48:26,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:26,164 INFO L93 Difference]: Finished difference Result 224 states and 233 transitions. [2020-07-19 21:48:26,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 21:48:26,170 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 202 [2020-07-19 21:48:26,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:26,172 INFO L225 Difference]: With dead ends: 224 [2020-07-19 21:48:26,172 INFO L226 Difference]: Without dead ends: 222 [2020-07-19 21:48:26,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-07-19 21:48:26,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-07-19 21:48:26,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2020-07-19 21:48:26,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-19 21:48:26,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 230 transitions. [2020-07-19 21:48:26,186 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 230 transitions. Word has length 202 [2020-07-19 21:48:26,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:26,187 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 230 transitions. [2020-07-19 21:48:26,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 21:48:26,187 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 230 transitions. [2020-07-19 21:48:26,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-07-19 21:48:26,188 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:26,188 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:26,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-07-19 21:48:26,402 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:26,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:26,402 INFO L82 PathProgramCache]: Analyzing trace with hash -239588296, now seen corresponding path program 22 times [2020-07-19 21:48:26,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:26,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553609978] [2020-07-19 21:48:26,403 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:26,408 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:26,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204565558] [2020-07-19 21:48:26,408 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:26,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:26,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-19 21:48:26,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2769 backedges. 70 proven. 319 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-07-19 21:48:27,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553609978] [2020-07-19 21:48:27,161 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:27,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204565558] [2020-07-19 21:48:27,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:27,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-07-19 21:48:27,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322748046] [2020-07-19 21:48:27,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 21:48:27,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:27,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 21:48:27,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:48:27,168 INFO L87 Difference]: Start difference. First operand 221 states and 230 transitions. Second operand 16 states. [2020-07-19 21:48:28,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:28,484 INFO L93 Difference]: Finished difference Result 228 states and 236 transitions. [2020-07-19 21:48:28,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 21:48:28,485 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 207 [2020-07-19 21:48:28,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:28,487 INFO L225 Difference]: With dead ends: 228 [2020-07-19 21:48:28,487 INFO L226 Difference]: Without dead ends: 223 [2020-07-19 21:48:28,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-07-19 21:48:28,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-07-19 21:48:28,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2020-07-19 21:48:28,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-07-19 21:48:28,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 228 transitions. [2020-07-19 21:48:28,503 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 228 transitions. Word has length 207 [2020-07-19 21:48:28,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:28,503 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 228 transitions. [2020-07-19 21:48:28,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 21:48:28,504 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 228 transitions. [2020-07-19 21:48:28,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-07-19 21:48:28,505 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:28,506 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:28,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:28,724 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:28,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:28,724 INFO L82 PathProgramCache]: Analyzing trace with hash 2072189178, now seen corresponding path program 23 times [2020-07-19 21:48:28,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:28,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695088183] [2020-07-19 21:48:28,725 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:28,737 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:28,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530647301] [2020-07-19 21:48:28,738 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:28,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 81 conjunts are in the unsatisfiable core [2020-07-19 21:48:28,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 74 proven. 366 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2020-07-19 21:48:29,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695088183] [2020-07-19 21:48:29,716 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:29,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530647301] [2020-07-19 21:48:29,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:29,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-19 21:48:29,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946566186] [2020-07-19 21:48:29,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-19 21:48:29,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:29,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-19 21:48:29,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-07-19 21:48:29,718 INFO L87 Difference]: Start difference. First operand 223 states and 228 transitions. Second operand 17 states. [2020-07-19 21:48:31,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:31,339 INFO L93 Difference]: Finished difference Result 241 states and 250 transitions. [2020-07-19 21:48:31,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 21:48:31,341 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 219 [2020-07-19 21:48:31,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:31,343 INFO L225 Difference]: With dead ends: 241 [2020-07-19 21:48:31,343 INFO L226 Difference]: Without dead ends: 239 [2020-07-19 21:48:31,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-07-19 21:48:31,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-07-19 21:48:31,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2020-07-19 21:48:31,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-07-19 21:48:31,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 247 transitions. [2020-07-19 21:48:31,359 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 247 transitions. Word has length 219 [2020-07-19 21:48:31,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:31,359 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 247 transitions. [2020-07-19 21:48:31,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-19 21:48:31,360 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 247 transitions. [2020-07-19 21:48:31,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-07-19 21:48:31,361 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:31,362 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:31,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-07-19 21:48:31,576 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:31,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:31,576 INFO L82 PathProgramCache]: Analyzing trace with hash -243370035, now seen corresponding path program 24 times [2020-07-19 21:48:31,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:31,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550510549] [2020-07-19 21:48:31,577 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:31,590 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:31,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435785770] [2020-07-19 21:48:31,591 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:31,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 55 conjunts are in the unsatisfiable core [2020-07-19 21:48:31,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3266 backedges. 76 proven. 378 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2020-07-19 21:48:32,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550510549] [2020-07-19 21:48:32,727 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:32,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435785770] [2020-07-19 21:48:32,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:32,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-19 21:48:32,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271351108] [2020-07-19 21:48:32,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-19 21:48:32,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:32,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-19 21:48:32,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-07-19 21:48:32,730 INFO L87 Difference]: Start difference. First operand 238 states and 247 transitions. Second operand 17 states. [2020-07-19 21:48:34,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:34,725 INFO L93 Difference]: Finished difference Result 245 states and 253 transitions. [2020-07-19 21:48:34,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 21:48:34,727 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 224 [2020-07-19 21:48:34,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:34,729 INFO L225 Difference]: With dead ends: 245 [2020-07-19 21:48:34,729 INFO L226 Difference]: Without dead ends: 240 [2020-07-19 21:48:34,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-07-19 21:48:34,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-07-19 21:48:34,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2020-07-19 21:48:34,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-07-19 21:48:34,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 245 transitions. [2020-07-19 21:48:34,742 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 245 transitions. Word has length 224 [2020-07-19 21:48:34,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:34,743 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 245 transitions. [2020-07-19 21:48:34,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-19 21:48:34,743 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 245 transitions. [2020-07-19 21:48:34,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-07-19 21:48:34,744 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:34,745 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:34,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-19 21:48:34,958 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:34,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:34,959 INFO L82 PathProgramCache]: Analyzing trace with hash 930327823, now seen corresponding path program 25 times [2020-07-19 21:48:34,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:34,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966027440] [2020-07-19 21:48:34,960 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:34,974 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:34,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852621856] [2020-07-19 21:48:34,975 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:35,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 87 conjunts are in the unsatisfiable core [2020-07-19 21:48:35,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:36,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 80 proven. 429 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2020-07-19 21:48:36,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966027440] [2020-07-19 21:48:36,595 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:36,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852621856] [2020-07-19 21:48:36,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:36,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-19 21:48:36,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113501953] [2020-07-19 21:48:36,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 21:48:36,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:36,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 21:48:36,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-07-19 21:48:36,597 INFO L87 Difference]: Start difference. First operand 240 states and 245 transitions. Second operand 18 states. [2020-07-19 21:48:39,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:39,008 INFO L93 Difference]: Finished difference Result 258 states and 267 transitions. [2020-07-19 21:48:39,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 21:48:39,010 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 236 [2020-07-19 21:48:39,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:39,013 INFO L225 Difference]: With dead ends: 258 [2020-07-19 21:48:39,013 INFO L226 Difference]: Without dead ends: 256 [2020-07-19 21:48:39,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-07-19 21:48:39,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-07-19 21:48:39,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2020-07-19 21:48:39,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-07-19 21:48:39,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 264 transitions. [2020-07-19 21:48:39,043 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 264 transitions. Word has length 236 [2020-07-19 21:48:39,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:39,044 INFO L479 AbstractCegarLoop]: Abstraction has 255 states and 264 transitions. [2020-07-19 21:48:39,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 21:48:39,044 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 264 transitions. [2020-07-19 21:48:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-19 21:48:39,047 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:39,047 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:39,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-19 21:48:39,262 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:39,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:39,262 INFO L82 PathProgramCache]: Analyzing trace with hash -593483560, now seen corresponding path program 26 times [2020-07-19 21:48:39,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:39,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212636929] [2020-07-19 21:48:39,263 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:39,272 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:39,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17615977] [2020-07-19 21:48:39,273 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:39,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 59 conjunts are in the unsatisfiable core [2020-07-19 21:48:39,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3804 backedges. 82 proven. 442 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2020-07-19 21:48:41,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212636929] [2020-07-19 21:48:41,052 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:41,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17615977] [2020-07-19 21:48:41,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:41,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-19 21:48:41,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329257637] [2020-07-19 21:48:41,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 21:48:41,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:41,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 21:48:41,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-07-19 21:48:41,054 INFO L87 Difference]: Start difference. First operand 255 states and 264 transitions. Second operand 18 states. [2020-07-19 21:48:43,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:43,646 INFO L93 Difference]: Finished difference Result 262 states and 270 transitions. [2020-07-19 21:48:43,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 21:48:43,649 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 241 [2020-07-19 21:48:43,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:43,651 INFO L225 Difference]: With dead ends: 262 [2020-07-19 21:48:43,651 INFO L226 Difference]: Without dead ends: 257 [2020-07-19 21:48:43,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-07-19 21:48:43,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-07-19 21:48:43,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2020-07-19 21:48:43,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-07-19 21:48:43,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 262 transitions. [2020-07-19 21:48:43,665 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 262 transitions. Word has length 241 [2020-07-19 21:48:43,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:43,666 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 262 transitions. [2020-07-19 21:48:43,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 21:48:43,666 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 262 transitions. [2020-07-19 21:48:43,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-07-19 21:48:43,667 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:43,668 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:43,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:43,882 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:43,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:43,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1345660314, now seen corresponding path program 27 times [2020-07-19 21:48:43,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:43,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357730856] [2020-07-19 21:48:43,884 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:43,891 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:43,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268264080] [2020-07-19 21:48:43,891 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:43,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 93 conjunts are in the unsatisfiable core [2020-07-19 21:48:43,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4195 backedges. 86 proven. 497 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2020-07-19 21:48:46,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357730856] [2020-07-19 21:48:46,795 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:46,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268264080] [2020-07-19 21:48:46,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:46,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-07-19 21:48:46,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241047886] [2020-07-19 21:48:46,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 21:48:46,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:46,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 21:48:46,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-07-19 21:48:46,798 INFO L87 Difference]: Start difference. First operand 257 states and 262 transitions. Second operand 19 states. [2020-07-19 21:48:50,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:50,437 INFO L93 Difference]: Finished difference Result 275 states and 284 transitions. [2020-07-19 21:48:50,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-19 21:48:50,439 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 253 [2020-07-19 21:48:50,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:50,441 INFO L225 Difference]: With dead ends: 275 [2020-07-19 21:48:50,441 INFO L226 Difference]: Without dead ends: 273 [2020-07-19 21:48:50,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-07-19 21:48:50,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-07-19 21:48:50,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 272. [2020-07-19 21:48:50,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-07-19 21:48:50,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 281 transitions. [2020-07-19 21:48:50,456 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 281 transitions. Word has length 253 [2020-07-19 21:48:50,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:50,457 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 281 transitions. [2020-07-19 21:48:50,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 21:48:50,457 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 281 transitions. [2020-07-19 21:48:50,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-07-19 21:48:50,459 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:50,459 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 44, 15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:50,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-07-19 21:48:50,673 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:50,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:50,673 INFO L82 PathProgramCache]: Analyzing trace with hash -952414419, now seen corresponding path program 28 times [2020-07-19 21:48:50,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:50,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180252861] [2020-07-19 21:48:50,674 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:50,685 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:50,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351575003] [2020-07-19 21:48:50,685 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:50,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-19 21:48:50,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4383 backedges. 88 proven. 511 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2020-07-19 21:48:53,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180252861] [2020-07-19 21:48:53,581 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:53,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351575003] [2020-07-19 21:48:53,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:53,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-07-19 21:48:53,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611129369] [2020-07-19 21:48:53,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 21:48:53,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:53,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 21:48:53,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-07-19 21:48:53,584 INFO L87 Difference]: Start difference. First operand 272 states and 281 transitions. Second operand 19 states. [2020-07-19 21:48:57,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:57,435 INFO L93 Difference]: Finished difference Result 279 states and 287 transitions. [2020-07-19 21:48:57,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-19 21:48:57,437 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 258 [2020-07-19 21:48:57,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:57,440 INFO L225 Difference]: With dead ends: 279 [2020-07-19 21:48:57,440 INFO L226 Difference]: Without dead ends: 274 [2020-07-19 21:48:57,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-07-19 21:48:57,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-07-19 21:48:57,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2020-07-19 21:48:57,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-07-19 21:48:57,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 279 transitions. [2020-07-19 21:48:57,454 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 279 transitions. Word has length 258 [2020-07-19 21:48:57,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:57,455 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 279 transitions. [2020-07-19 21:48:57,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 21:48:57,455 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 279 transitions. [2020-07-19 21:48:57,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-07-19 21:48:57,457 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:57,457 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 46, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:57,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:57,671 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:57,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:57,672 INFO L82 PathProgramCache]: Analyzing trace with hash -825723793, now seen corresponding path program 29 times [2020-07-19 21:48:57,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:57,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410458926] [2020-07-19 21:48:57,673 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:48:57,680 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:57,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646647953] [2020-07-19 21:48:57,680 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:48:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:57,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 99 conjunts are in the unsatisfiable core [2020-07-19 21:48:57,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:49:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 92 proven. 570 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2020-07-19 21:49:02,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410458926] [2020-07-19 21:49:02,122 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:49:02,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646647953] [2020-07-19 21:49:02,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:49:02,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-19 21:49:02,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146153645] [2020-07-19 21:49:02,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-19 21:49:02,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:49:02,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-19 21:49:02,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-07-19 21:49:02,124 INFO L87 Difference]: Start difference. First operand 274 states and 279 transitions. Second operand 20 states. [2020-07-19 21:49:08,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:49:08,007 INFO L93 Difference]: Finished difference Result 292 states and 301 transitions. [2020-07-19 21:49:08,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-19 21:49:08,017 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 270 [2020-07-19 21:49:08,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:49:08,019 INFO L225 Difference]: With dead ends: 292 [2020-07-19 21:49:08,019 INFO L226 Difference]: Without dead ends: 290 [2020-07-19 21:49:08,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-07-19 21:49:08,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-07-19 21:49:08,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2020-07-19 21:49:08,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-07-19 21:49:08,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 298 transitions. [2020-07-19 21:49:08,037 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 298 transitions. Word has length 270 [2020-07-19 21:49:08,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:49:08,037 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 298 transitions. [2020-07-19 21:49:08,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-19 21:49:08,037 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 298 transitions. [2020-07-19 21:49:08,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-07-19 21:49:08,039 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:49:08,039 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 47, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:49:08,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-07-19 21:49:08,254 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:49:08,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:49:08,254 INFO L82 PathProgramCache]: Analyzing trace with hash -234816136, now seen corresponding path program 30 times [2020-07-19 21:49:08,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:49:08,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607614425] [2020-07-19 21:49:08,255 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:49:08,267 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:49:08,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318935732] [2020-07-19 21:49:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:49:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:08,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-19 21:49:08,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:49:12,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5003 backedges. 94 proven. 585 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2020-07-19 21:49:12,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607614425] [2020-07-19 21:49:12,128 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:49:12,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318935732] [2020-07-19 21:49:12,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:49:12,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-19 21:49:12,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731459438] [2020-07-19 21:49:12,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-19 21:49:12,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:49:12,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-19 21:49:12,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-07-19 21:49:12,129 INFO L87 Difference]: Start difference. First operand 289 states and 298 transitions. Second operand 20 states. [2020-07-19 21:49:17,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:49:17,082 INFO L93 Difference]: Finished difference Result 296 states and 304 transitions. [2020-07-19 21:49:17,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-19 21:49:17,084 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 275 [2020-07-19 21:49:17,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:49:17,086 INFO L225 Difference]: With dead ends: 296 [2020-07-19 21:49:17,086 INFO L226 Difference]: Without dead ends: 291 [2020-07-19 21:49:17,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-07-19 21:49:17,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-07-19 21:49:17,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2020-07-19 21:49:17,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-07-19 21:49:17,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 296 transitions. [2020-07-19 21:49:17,101 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 296 transitions. Word has length 275 [2020-07-19 21:49:17,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:49:17,102 INFO L479 AbstractCegarLoop]: Abstraction has 291 states and 296 transitions. [2020-07-19 21:49:17,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-19 21:49:17,102 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 296 transitions. [2020-07-19 21:49:17,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-07-19 21:49:17,104 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:49:17,105 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 49, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:49:17,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-07-19 21:49:17,318 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:49:17,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:49:17,318 INFO L82 PathProgramCache]: Analyzing trace with hash -388232646, now seen corresponding path program 31 times [2020-07-19 21:49:17,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:49:17,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372213526] [2020-07-19 21:49:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:49:17,323 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:49:17,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671087006] [2020-07-19 21:49:17,324 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:49:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:17,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 105 conjunts are in the unsatisfiable core [2020-07-19 21:49:17,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:49:20,589 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:49:24,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5450 backedges. 98 proven. 648 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2020-07-19 21:49:24,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372213526] [2020-07-19 21:49:24,190 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:49:24,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671087006] [2020-07-19 21:49:24,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:49:24,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-19 21:49:24,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415798570] [2020-07-19 21:49:24,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-19 21:49:24,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:49:24,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-19 21:49:24,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-07-19 21:49:24,192 INFO L87 Difference]: Start difference. First operand 291 states and 296 transitions. Second operand 21 states. [2020-07-19 21:49:32,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:49:32,280 INFO L93 Difference]: Finished difference Result 309 states and 318 transitions. [2020-07-19 21:49:32,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-19 21:49:32,286 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 287 [2020-07-19 21:49:32,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:49:32,287 INFO L225 Difference]: With dead ends: 309 [2020-07-19 21:49:32,288 INFO L226 Difference]: Without dead ends: 307 [2020-07-19 21:49:32,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-07-19 21:49:32,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-07-19 21:49:32,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 306. [2020-07-19 21:49:32,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-07-19 21:49:32,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 315 transitions. [2020-07-19 21:49:32,302 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 315 transitions. Word has length 287 [2020-07-19 21:49:32,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:49:32,303 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 315 transitions. [2020-07-19 21:49:32,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-19 21:49:32,303 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 315 transitions. [2020-07-19 21:49:32,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2020-07-19 21:49:32,305 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:49:32,305 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 50, 17, 17, 17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:49:32,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-07-19 21:49:32,519 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:49:32,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:49:32,520 INFO L82 PathProgramCache]: Analyzing trace with hash -934654323, now seen corresponding path program 32 times [2020-07-19 21:49:32,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:49:32,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133853063] [2020-07-19 21:49:32,521 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:49:32,529 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:49:32,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441992937] [2020-07-19 21:49:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:49:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:32,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 71 conjunts are in the unsatisfiable core [2020-07-19 21:49:32,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:49:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5664 backedges. 100 proven. 664 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2020-07-19 21:49:37,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133853063] [2020-07-19 21:49:37,891 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:49:37,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441992937] [2020-07-19 21:49:37,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:49:37,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-19 21:49:37,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216171038] [2020-07-19 21:49:37,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-19 21:49:37,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:49:37,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-19 21:49:37,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-07-19 21:49:37,893 INFO L87 Difference]: Start difference. First operand 306 states and 315 transitions. Second operand 21 states. [2020-07-19 21:49:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:49:44,904 INFO L93 Difference]: Finished difference Result 313 states and 321 transitions. [2020-07-19 21:49:44,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-19 21:49:44,908 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 292 [2020-07-19 21:49:44,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:49:44,909 INFO L225 Difference]: With dead ends: 313 [2020-07-19 21:49:44,910 INFO L226 Difference]: Without dead ends: 308 [2020-07-19 21:49:44,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-07-19 21:49:44,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-07-19 21:49:44,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2020-07-19 21:49:44,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-07-19 21:49:44,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 313 transitions. [2020-07-19 21:49:44,924 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 313 transitions. Word has length 292 [2020-07-19 21:49:44,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:49:44,924 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 313 transitions. [2020-07-19 21:49:44,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-19 21:49:44,924 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 313 transitions. [2020-07-19 21:49:44,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-07-19 21:49:44,926 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:49:44,927 INFO L422 BasicCegarLoop]: trace histogram [53, 52, 52, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:49:45,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-07-19 21:49:45,139 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:49:45,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:49:45,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1619827761, now seen corresponding path program 33 times [2020-07-19 21:49:45,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:49:45,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341096404] [2020-07-19 21:49:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:49:45,148 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:49:45,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575226117] [2020-07-19 21:49:45,148 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:49:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:45,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 111 conjunts are in the unsatisfiable core [2020-07-19 21:49:45,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:49:45,872 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:49:46,176 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-19 21:49:46,528 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:49:46,904 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:49:47,321 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:49:47,798 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:49:48,296 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:49:49,278 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:49:49,908 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:49:50,613 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:49:51,346 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:49:52,115 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:49:52,884 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:49:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6139 backedges. 104 proven. 731 refuted. 0 times theorem prover too weak. 5304 trivial. 0 not checked. [2020-07-19 21:49:55,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341096404] [2020-07-19 21:49:55,072 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:49:55,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575226117] [2020-07-19 21:49:55,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:49:55,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-07-19 21:49:55,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269669341] [2020-07-19 21:49:55,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-19 21:49:55,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:49:55,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-19 21:49:55,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-07-19 21:49:55,076 INFO L87 Difference]: Start difference. First operand 308 states and 313 transitions. Second operand 22 states. [2020-07-19 21:50:06,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:50:06,246 INFO L93 Difference]: Finished difference Result 326 states and 335 transitions. [2020-07-19 21:50:06,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-19 21:50:06,249 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 304 [2020-07-19 21:50:06,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:50:06,252 INFO L225 Difference]: With dead ends: 326 [2020-07-19 21:50:06,252 INFO L226 Difference]: Without dead ends: 324 [2020-07-19 21:50:06,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-07-19 21:50:06,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-07-19 21:50:06,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2020-07-19 21:50:06,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-07-19 21:50:06,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 332 transitions. [2020-07-19 21:50:06,267 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 332 transitions. Word has length 304 [2020-07-19 21:50:06,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:50:06,268 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 332 transitions. [2020-07-19 21:50:06,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-19 21:50:06,268 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 332 transitions. [2020-07-19 21:50:06,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-07-19 21:50:06,270 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:50:06,271 INFO L422 BasicCegarLoop]: trace histogram [54, 53, 53, 18, 18, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:50:06,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-07-19 21:50:06,481 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:50:06,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:50:06,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1973725720, now seen corresponding path program 34 times [2020-07-19 21:50:06,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:50:06,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177785657] [2020-07-19 21:50:06,483 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:50:06,489 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:50:06,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608929522] [2020-07-19 21:50:06,490 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:50:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:50:06,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 75 conjunts are in the unsatisfiable core [2020-07-19 21:50:06,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:50:14,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6366 backedges. 106 proven. 748 refuted. 0 times theorem prover too weak. 5512 trivial. 0 not checked. [2020-07-19 21:50:14,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177785657] [2020-07-19 21:50:14,329 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:50:14,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608929522] [2020-07-19 21:50:14,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:50:14,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-07-19 21:50:14,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052505796] [2020-07-19 21:50:14,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-19 21:50:14,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:50:14,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-19 21:50:14,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-07-19 21:50:14,335 INFO L87 Difference]: Start difference. First operand 323 states and 332 transitions. Second operand 22 states. [2020-07-19 21:50:23,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:50:23,857 INFO L93 Difference]: Finished difference Result 330 states and 338 transitions. [2020-07-19 21:50:23,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-19 21:50:23,860 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 309 [2020-07-19 21:50:23,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:50:23,863 INFO L225 Difference]: With dead ends: 330 [2020-07-19 21:50:23,863 INFO L226 Difference]: Without dead ends: 325 [2020-07-19 21:50:23,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-07-19 21:50:23,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-07-19 21:50:23,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2020-07-19 21:50:23,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-07-19 21:50:23,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 330 transitions. [2020-07-19 21:50:23,882 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 330 transitions. Word has length 309 [2020-07-19 21:50:23,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:50:23,882 INFO L479 AbstractCegarLoop]: Abstraction has 325 states and 330 transitions. [2020-07-19 21:50:23,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-19 21:50:23,883 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 330 transitions. [2020-07-19 21:50:23,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-07-19 21:50:23,885 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:50:23,885 INFO L422 BasicCegarLoop]: trace histogram [56, 55, 55, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:50:24,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-07-19 21:50:24,101 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:50:24,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:50:24,102 INFO L82 PathProgramCache]: Analyzing trace with hash 708953818, now seen corresponding path program 35 times [2020-07-19 21:50:24,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:50:24,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321026788] [2020-07-19 21:50:24,102 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:50:24,111 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:50:24,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [107215604] [2020-07-19 21:50:24,112 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:50:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:50:24,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 117 conjunts are in the unsatisfiable core [2020-07-19 21:50:24,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:50:24,616 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-19 21:50:25,134 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-19 21:50:25,539 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:50:25,993 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:50:26,498 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:50:27,054 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:50:27,648 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:50:28,281 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:50:28,945 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:50:29,688 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-19 21:50:30,488 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:50:31,374 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:50:32,277 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:50:33,232 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:50:34,289 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:50:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6869 backedges. 110 proven. 819 refuted. 0 times theorem prover too weak. 5940 trivial. 0 not checked. [2020-07-19 21:50:37,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321026788] [2020-07-19 21:50:37,013 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:50:37,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107215604] [2020-07-19 21:50:37,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:50:37,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-19 21:50:37,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703489562] [2020-07-19 21:50:37,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-19 21:50:37,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:50:37,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-19 21:50:37,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-07-19 21:50:37,014 INFO L87 Difference]: Start difference. First operand 325 states and 330 transitions. Second operand 23 states. [2020-07-19 21:50:51,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:50:51,621 INFO L93 Difference]: Finished difference Result 343 states and 352 transitions. [2020-07-19 21:50:51,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-19 21:50:51,625 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 321 [2020-07-19 21:50:51,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:50:51,627 INFO L225 Difference]: With dead ends: 343 [2020-07-19 21:50:51,627 INFO L226 Difference]: Without dead ends: 341 [2020-07-19 21:50:51,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-07-19 21:50:51,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-07-19 21:50:51,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 340. [2020-07-19 21:50:51,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-07-19 21:50:51,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 349 transitions. [2020-07-19 21:50:51,645 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 349 transitions. Word has length 321 [2020-07-19 21:50:51,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:50:51,646 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 349 transitions. [2020-07-19 21:50:51,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-19 21:50:51,646 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 349 transitions. [2020-07-19 21:50:51,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-19 21:50:51,649 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:50:51,649 INFO L422 BasicCegarLoop]: trace histogram [57, 56, 56, 19, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:50:51,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-07-19 21:50:51,863 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:50:51,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:50:51,863 INFO L82 PathProgramCache]: Analyzing trace with hash 2116122093, now seen corresponding path program 36 times [2020-07-19 21:50:51,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:50:51,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005680007] [2020-07-19 21:50:51,864 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:50:51,869 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:50:51,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083637997] [2020-07-19 21:50:51,870 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:50:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:50:51,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 79 conjunts are in the unsatisfiable core [2020-07-19 21:50:51,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:50:53,897 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:50:54,351 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:50:54,843 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:50:59,929 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:51:00,773 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:51:02,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7109 backedges. 112 proven. 837 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2020-07-19 21:51:02,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005680007] [2020-07-19 21:51:02,278 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:51:02,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083637997] [2020-07-19 21:51:02,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:51:02,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-19 21:51:02,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662939870] [2020-07-19 21:51:02,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-19 21:51:02,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:51:02,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-19 21:51:02,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-07-19 21:51:02,280 INFO L87 Difference]: Start difference. First operand 340 states and 349 transitions. Second operand 23 states. [2020-07-19 21:51:14,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:51:14,464 INFO L93 Difference]: Finished difference Result 347 states and 355 transitions. [2020-07-19 21:51:14,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-19 21:51:14,468 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 326 [2020-07-19 21:51:14,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:51:14,470 INFO L225 Difference]: With dead ends: 347 [2020-07-19 21:51:14,470 INFO L226 Difference]: Without dead ends: 342 [2020-07-19 21:51:14,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-07-19 21:51:14,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-07-19 21:51:14,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2020-07-19 21:51:14,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-07-19 21:51:14,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 347 transitions. [2020-07-19 21:51:14,485 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 347 transitions. Word has length 326 [2020-07-19 21:51:14,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:51:14,485 INFO L479 AbstractCegarLoop]: Abstraction has 342 states and 347 transitions. [2020-07-19 21:51:14,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-19 21:51:14,485 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 347 transitions. [2020-07-19 21:51:14,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-19 21:51:14,488 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:51:14,488 INFO L422 BasicCegarLoop]: trace histogram [59, 58, 58, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:51:14,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-07-19 21:51:14,701 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:51:14,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:51:14,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1310033105, now seen corresponding path program 37 times [2020-07-19 21:51:14,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:51:14,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012635790] [2020-07-19 21:51:14,703 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:51:14,709 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:51:14,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371815198] [2020-07-19 21:51:14,709 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:51:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:51:14,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 123 conjunts are in the unsatisfiable core [2020-07-19 21:51:14,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:51:15,017 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:51:15,248 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:51:15,642 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-19 21:51:16,076 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-19 21:51:16,524 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:51:17,037 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:51:17,644 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-19 21:51:18,393 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-19 21:51:19,165 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:51:19,958 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:51:20,865 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:51:21,782 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:51:22,719 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:51:23,692 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:51:24,794 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:51:25,851 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:51:26,941 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:51:28,245 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:51:29,350 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-19 21:51:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7640 backedges. 116 proven. 912 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2020-07-19 21:51:31,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012635790] [2020-07-19 21:51:31,795 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:51:31,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371815198] [2020-07-19 21:51:31,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:51:31,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-07-19 21:51:31,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540853885] [2020-07-19 21:51:31,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-19 21:51:31,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:51:31,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-19 21:51:31,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-07-19 21:51:31,798 INFO L87 Difference]: Start difference. First operand 342 states and 347 transitions. Second operand 24 states. [2020-07-19 21:51:51,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:51:51,136 INFO L93 Difference]: Finished difference Result 360 states and 369 transitions. [2020-07-19 21:51:51,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-19 21:51:51,140 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 338 [2020-07-19 21:51:51,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:51:51,142 INFO L225 Difference]: With dead ends: 360 [2020-07-19 21:51:51,142 INFO L226 Difference]: Without dead ends: 358 [2020-07-19 21:51:51,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-07-19 21:51:51,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-07-19 21:51:51,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 357. [2020-07-19 21:51:51,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-07-19 21:51:51,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 366 transitions. [2020-07-19 21:51:51,160 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 366 transitions. Word has length 338 [2020-07-19 21:51:51,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:51:51,160 INFO L479 AbstractCegarLoop]: Abstraction has 357 states and 366 transitions. [2020-07-19 21:51:51,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-19 21:51:51,161 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 366 transitions. [2020-07-19 21:51:51,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-19 21:51:51,163 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:51:51,163 INFO L422 BasicCegarLoop]: trace histogram [60, 59, 59, 20, 20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:51:51,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:51:51,378 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:51:51,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:51:51,378 INFO L82 PathProgramCache]: Analyzing trace with hash 953495224, now seen corresponding path program 38 times [2020-07-19 21:51:51,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:51:51,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340296611] [2020-07-19 21:51:51,379 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:51:51,384 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:51:51,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428419829] [2020-07-19 21:51:51,385 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 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 [2020-07-19 21:51:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:51:51,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 83 conjunts are in the unsatisfiable core [2020-07-19 21:51:51,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:51:51,704 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:51:52,123 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:51:52,486 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:51:52,899 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:51:53,314 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:51:53,780 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:51:54,282 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:51:54,880 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:51:56,081 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:51:56,802 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:51:57,629 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:51:58,457 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:51:59,322 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:52:00,308 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:52:01,355 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:52:02,454 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:52:03,597 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:52:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7893 backedges. 118 proven. 931 refuted. 0 times theorem prover too weak. 6844 trivial. 0 not checked. [2020-07-19 21:52:05,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340296611] [2020-07-19 21:52:05,402 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:52:05,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428419829] [2020-07-19 21:52:05,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:52:05,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-07-19 21:52:05,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80000882] [2020-07-19 21:52:05,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-19 21:52:05,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:52:05,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-19 21:52:05,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-07-19 21:52:05,405 INFO L87 Difference]: Start difference. First operand 357 states and 366 transitions. Second operand 24 states. [2020-07-19 21:52:23,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:52:23,160 INFO L93 Difference]: Finished difference Result 364 states and 372 transitions. [2020-07-19 21:52:23,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-19 21:52:23,166 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 343 [2020-07-19 21:52:23,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:52:23,168 INFO L225 Difference]: With dead ends: 364 [2020-07-19 21:52:23,168 INFO L226 Difference]: Without dead ends: 359 [2020-07-19 21:52:23,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-07-19 21:52:23,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-07-19 21:52:23,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2020-07-19 21:52:23,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2020-07-19 21:52:23,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 364 transitions. [2020-07-19 21:52:23,185 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 364 transitions. Word has length 343 [2020-07-19 21:52:23,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:52:23,186 INFO L479 AbstractCegarLoop]: Abstraction has 359 states and 364 transitions. [2020-07-19 21:52:23,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-19 21:52:23,186 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 364 transitions. [2020-07-19 21:52:23,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2020-07-19 21:52:23,189 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:52:23,189 INFO L422 BasicCegarLoop]: trace histogram [62, 61, 61, 21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:52:23,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:52:23,403 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:52:23,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:52:23,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1185962874, now seen corresponding path program 39 times [2020-07-19 21:52:23,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:52:23,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709667148] [2020-07-19 21:52:23,405 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:52:23,412 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:52:23,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936864185] [2020-07-19 21:52:23,413 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:52:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:52:23,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 129 conjunts are in the unsatisfiable core [2020-07-19 21:52:23,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:52:23,777 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:52:24,181 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:52:24,599 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:52:25,093 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:52:25,724 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-19 21:52:26,428 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:52:27,210 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:52:28,039 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:52:28,954 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:52:29,951 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:52:31,016 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:52:32,159 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:52:33,388 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:52:34,681 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:52:35,989 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:52:37,471 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:52:39,045 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:52:40,674 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:52:42,343 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:52:43,601 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-19 21:52:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8452 backedges. 122 proven. 1010 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2020-07-19 21:52:46,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709667148] [2020-07-19 21:52:46,862 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:52:46,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936864185] [2020-07-19 21:52:46,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:52:46,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-19 21:52:46,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217144023] [2020-07-19 21:52:46,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-19 21:52:46,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:52:46,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-19 21:52:46,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-07-19 21:52:46,864 INFO L87 Difference]: Start difference. First operand 359 states and 364 transitions. Second operand 25 states. [2020-07-19 21:53:14,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:53:14,146 INFO L93 Difference]: Finished difference Result 377 states and 386 transitions. [2020-07-19 21:53:14,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-19 21:53:14,156 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 355 [2020-07-19 21:53:14,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:53:14,158 INFO L225 Difference]: With dead ends: 377 [2020-07-19 21:53:14,158 INFO L226 Difference]: Without dead ends: 375 [2020-07-19 21:53:14,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-07-19 21:53:14,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-07-19 21:53:14,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 374. [2020-07-19 21:53:14,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-07-19 21:53:14,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 383 transitions. [2020-07-19 21:53:14,176 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 383 transitions. Word has length 355 [2020-07-19 21:53:14,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:53:14,177 INFO L479 AbstractCegarLoop]: Abstraction has 374 states and 383 transitions. [2020-07-19 21:53:14,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-19 21:53:14,177 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 383 transitions. [2020-07-19 21:53:14,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-07-19 21:53:14,181 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:53:14,181 INFO L422 BasicCegarLoop]: trace histogram [63, 62, 62, 21, 21, 21, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:53:14,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-07-19 21:53:14,396 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:53:14,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:53:14,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1799961267, now seen corresponding path program 40 times [2020-07-19 21:53:14,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:53:14,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674077843] [2020-07-19 21:53:14,397 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:53:14,408 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:53:14,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289208934] [2020-07-19 21:53:14,410 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:53:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:53:14,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 87 conjunts are in the unsatisfiable core [2020-07-19 21:53:14,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:53:14,775 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:53:15,044 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:53:15,308 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:53:15,722 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:53:16,214 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:53:16,808 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:53:17,962 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:53:18,669 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:53:19,435 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:53:20,269 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:53:21,223 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:53:22,241 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:53:23,308 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:53:24,486 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:53:25,625 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:53:26,856 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:53:28,028 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:53:29,414 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:53:30,828 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:53:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8718 backedges. 124 proven. 1030 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2020-07-19 21:53:33,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674077843] [2020-07-19 21:53:33,394 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:53:33,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289208934] [2020-07-19 21:53:33,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:53:33,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-19 21:53:33,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222956115] [2020-07-19 21:53:33,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-19 21:53:33,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:53:33,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-19 21:53:33,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-07-19 21:53:33,396 INFO L87 Difference]: Start difference. First operand 374 states and 383 transitions. Second operand 25 states. [2020-07-19 21:53:56,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:53:56,843 INFO L93 Difference]: Finished difference Result 381 states and 389 transitions. [2020-07-19 21:53:56,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-19 21:53:56,849 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 360 [2020-07-19 21:53:56,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:53:56,851 INFO L225 Difference]: With dead ends: 381 [2020-07-19 21:53:56,851 INFO L226 Difference]: Without dead ends: 376 [2020-07-19 21:53:56,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-07-19 21:53:56,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-07-19 21:53:56,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2020-07-19 21:53:56,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-07-19 21:53:56,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 381 transitions. [2020-07-19 21:53:56,870 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 381 transitions. Word has length 360 [2020-07-19 21:53:56,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:53:56,871 INFO L479 AbstractCegarLoop]: Abstraction has 376 states and 381 transitions. [2020-07-19 21:53:56,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-19 21:53:56,871 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 381 transitions. [2020-07-19 21:53:56,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2020-07-19 21:53:56,874 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:53:56,874 INFO L422 BasicCegarLoop]: trace histogram [65, 64, 64, 22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:53:57,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:53:57,088 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:53:57,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:53:57,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1898166927, now seen corresponding path program 41 times [2020-07-19 21:53:57,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:53:57,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855651188] [2020-07-19 21:53:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:53:57,104 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:53:57,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224123122] [2020-07-19 21:53:57,105 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:53:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:53:57,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 135 conjunts are in the unsatisfiable core [2020-07-19 21:53:57,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:53:57,529 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:53:57,994 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-19 21:53:58,601 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:53:59,305 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:54:00,043 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:54:00,863 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:54:01,924 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-19 21:54:03,064 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:54:04,270 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:54:05,577 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:54:07,021 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:54:08,510 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:54:10,117 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:54:11,816 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:54:13,588 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:54:15,212 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:54:17,074 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:54:19,197 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-19 21:54:21,428 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:54:23,573 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:54:25,386 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-19 21:54:29,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9305 backedges. 128 proven. 1113 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2020-07-19 21:54:29,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855651188] [2020-07-19 21:54:29,243 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:54:29,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224123122] [2020-07-19 21:54:29,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:54:29,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-07-19 21:54:29,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003085830] [2020-07-19 21:54:29,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-19 21:54:29,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:54:29,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-19 21:54:29,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-07-19 21:54:29,245 INFO L87 Difference]: Start difference. First operand 376 states and 381 transitions. Second operand 26 states. [2020-07-19 21:55:05,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:55:05,035 INFO L93 Difference]: Finished difference Result 394 states and 403 transitions. [2020-07-19 21:55:05,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-19 21:55:05,043 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 372 [2020-07-19 21:55:05,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:55:05,045 INFO L225 Difference]: With dead ends: 394 [2020-07-19 21:55:05,045 INFO L226 Difference]: Without dead ends: 392 [2020-07-19 21:55:05,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.7s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2020-07-19 21:55:05,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-07-19 21:55:05,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 391. [2020-07-19 21:55:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-07-19 21:55:05,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 400 transitions. [2020-07-19 21:55:05,065 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 400 transitions. Word has length 372 [2020-07-19 21:55:05,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:55:05,066 INFO L479 AbstractCegarLoop]: Abstraction has 391 states and 400 transitions. [2020-07-19 21:55:05,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-19 21:55:05,066 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 400 transitions. [2020-07-19 21:55:05,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-07-19 21:55:05,069 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:55:05,069 INFO L422 BasicCegarLoop]: trace histogram [66, 65, 65, 22, 22, 22, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:55:05,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:55:05,285 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:55:05,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:55:05,286 INFO L82 PathProgramCache]: Analyzing trace with hash 979143512, now seen corresponding path program 42 times [2020-07-19 21:55:05,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:55:05,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626973316] [2020-07-19 21:55:05,287 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:55:05,293 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:55:05,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367612049] [2020-07-19 21:55:05,294 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:55:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:55:05,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 91 conjunts are in the unsatisfiable core [2020-07-19 21:55:05,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:55:05,749 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:55:06,074 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:55:06,522 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:55:07,042 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:55:07,618 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-19 21:55:08,253 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:55:08,783 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:55:09,604 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:55:10,499 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:55:11,471 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:55:12,532 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-19 21:55:13,692 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:55:15,092 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:55:16,343 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:55:17,646 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:55:19,066 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:55:20,524 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:55:21,968 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:55:23,649 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:55:25,446 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:55:27,631 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:55:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9584 backedges. 130 proven. 1134 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2020-07-19 21:55:31,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626973316] [2020-07-19 21:55:31,006 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:55:31,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367612049] [2020-07-19 21:55:31,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:55:31,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-07-19 21:55:31,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330671715] [2020-07-19 21:55:31,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-19 21:55:31,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:55:31,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-19 21:55:31,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-07-19 21:55:31,007 INFO L87 Difference]: Start difference. First operand 391 states and 400 transitions. Second operand 26 states. [2020-07-19 21:56:00,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:56:00,752 INFO L93 Difference]: Finished difference Result 398 states and 406 transitions. [2020-07-19 21:56:00,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-19 21:56:00,759 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 377 [2020-07-19 21:56:00,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:56:00,762 INFO L225 Difference]: With dead ends: 398 [2020-07-19 21:56:00,762 INFO L226 Difference]: Without dead ends: 393 [2020-07-19 21:56:00,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2020-07-19 21:56:00,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-07-19 21:56:00,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2020-07-19 21:56:00,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-07-19 21:56:00,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 398 transitions. [2020-07-19 21:56:00,783 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 398 transitions. Word has length 377 [2020-07-19 21:56:00,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:56:00,784 INFO L479 AbstractCegarLoop]: Abstraction has 393 states and 398 transitions. [2020-07-19 21:56:00,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-19 21:56:00,784 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 398 transitions. [2020-07-19 21:56:00,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-07-19 21:56:00,787 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:56:00,787 INFO L422 BasicCegarLoop]: trace histogram [68, 67, 67, 23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:56:01,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-07-19 21:56:01,001 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:56:01,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:56:01,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1576126490, now seen corresponding path program 43 times [2020-07-19 21:56:01,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:56:01,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702341168] [2020-07-19 21:56:01,002 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:56:01,007 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:56:01,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520619740] [2020-07-19 21:56:01,008 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:56:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:56:01,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 141 conjunts are in the unsatisfiable core [2020-07-19 21:56:01,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:56:01,530 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:56:01,976 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:56:02,705 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-19 21:56:03,536 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:56:04,469 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:56:05,506 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:56:06,656 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:56:07,960 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:56:09,421 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:56:10,747 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:56:12,454 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:56:14,237 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:56:16,155 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:56:18,226 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:56:20,413 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:56:22,758 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:56:25,284 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-19 21:56:27,844 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-19 21:56:30,053 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:56:32,752 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:56:35,877 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:56:38,465 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-19 21:56:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10199 backedges. 134 proven. 1221 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2020-07-19 21:56:43,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702341168] [2020-07-19 21:56:43,530 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:56:43,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520619740] [2020-07-19 21:56:43,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:56:43,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-07-19 21:56:43,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615411683] [2020-07-19 21:56:43,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-19 21:56:43,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:56:43,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-19 21:56:43,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-07-19 21:56:43,533 INFO L87 Difference]: Start difference. First operand 393 states and 398 transitions. Second operand 27 states. [2020-07-19 21:57:31,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:57:31,618 INFO L93 Difference]: Finished difference Result 411 states and 420 transitions. [2020-07-19 21:57:31,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-19 21:57:31,625 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 389 [2020-07-19 21:57:31,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:57:31,626 INFO L225 Difference]: With dead ends: 411 [2020-07-19 21:57:31,626 INFO L226 Difference]: Without dead ends: 409 [2020-07-19 21:57:31,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.5s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2020-07-19 21:57:31,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-07-19 21:57:31,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 408. [2020-07-19 21:57:31,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-07-19 21:57:31,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 417 transitions. [2020-07-19 21:57:31,643 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 417 transitions. Word has length 389 [2020-07-19 21:57:31,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:57:31,644 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 417 transitions. [2020-07-19 21:57:31,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-19 21:57:31,644 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 417 transitions. [2020-07-19 21:57:31,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-07-19 21:57:31,647 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:57:31,647 INFO L422 BasicCegarLoop]: trace histogram [69, 68, 68, 23, 23, 23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:57:31,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-07-19 21:57:31,861 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:57:31,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:57:31,861 INFO L82 PathProgramCache]: Analyzing trace with hash 981482669, now seen corresponding path program 44 times [2020-07-19 21:57:31,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:57:31,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650854125] [2020-07-19 21:57:31,862 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:57:31,869 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:57:31,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584416233] [2020-07-19 21:57:31,870 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:57:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:57:32,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 95 conjunts are in the unsatisfiable core [2020-07-19 21:57:32,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:57:32,406 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:57:32,880 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:57:33,455 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:57:34,106 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:57:34,826 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:57:35,637 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:57:36,529 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:57:37,332 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:57:38,380 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:57:39,542 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:57:40,556 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:57:41,944 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:57:43,434 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:57:44,981 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:57:46,711 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:57:48,992 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:57:50,856 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:57:52,783 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:57:54,812 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:57:56,690 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:57:59,052 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:58:01,459 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 21:58:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10491 backedges. 136 proven. 1243 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2020-07-19 21:58:05,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650854125] [2020-07-19 21:58:05,955 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:58:05,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584416233] [2020-07-19 21:58:05,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:58:05,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-07-19 21:58:05,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879762605] [2020-07-19 21:58:05,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-19 21:58:05,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:58:05,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-19 21:58:05,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-07-19 21:58:05,957 INFO L87 Difference]: Start difference. First operand 408 states and 417 transitions. Second operand 27 states. [2020-07-19 21:58:47,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:58:47,398 INFO L93 Difference]: Finished difference Result 415 states and 423 transitions. [2020-07-19 21:58:47,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-19 21:58:47,407 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 394 [2020-07-19 21:58:47,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:58:47,409 INFO L225 Difference]: With dead ends: 415 [2020-07-19 21:58:47,409 INFO L226 Difference]: Without dead ends: 410 [2020-07-19 21:58:47,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2020-07-19 21:58:47,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-07-19 21:58:47,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2020-07-19 21:58:47,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2020-07-19 21:58:47,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 415 transitions. [2020-07-19 21:58:47,429 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 415 transitions. Word has length 394 [2020-07-19 21:58:47,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:58:47,430 INFO L479 AbstractCegarLoop]: Abstraction has 410 states and 415 transitions. [2020-07-19 21:58:47,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-19 21:58:47,430 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 415 transitions. [2020-07-19 21:58:47,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2020-07-19 21:58:47,434 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:58:47,434 INFO L422 BasicCegarLoop]: trace histogram [71, 70, 70, 24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:58:47,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-07-19 21:58:47,649 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:58:47,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:58:47,649 INFO L82 PathProgramCache]: Analyzing trace with hash 177545711, now seen corresponding path program 45 times [2020-07-19 21:58:47,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:58:47,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69915354] [2020-07-19 21:58:47,650 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 21:58:47,657 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:58:47,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354756344] [2020-07-19 21:58:47,657 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:58:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:58:47,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 147 conjunts are in the unsatisfiable core [2020-07-19 21:58:47,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:58:48,257 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 21:58:48,950 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-19 21:58:49,843 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-19 21:58:50,631 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:58:51,821 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:58:53,187 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:58:54,750 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:58:56,436 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:58:58,241 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:59:00,275 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:59:02,493 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:59:04,758 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:59:07,142 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:59:09,673 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:59:12,399 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:59:14,896 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:59:17,367 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:59:20,663 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:59:23,924 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:59:27,206 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 21:59:30,400 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:59:34,142 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:59:37,117 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-19 21:59:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11134 backedges. 140 proven. 1334 refuted. 0 times theorem prover too weak. 9660 trivial. 0 not checked. [2020-07-19 21:59:43,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69915354] [2020-07-19 21:59:43,671 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:59:43,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354756344] [2020-07-19 21:59:43,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:59:43,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-07-19 21:59:43,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131996089] [2020-07-19 21:59:43,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-19 21:59:43,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:59:43,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-19 21:59:43,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-07-19 21:59:43,673 INFO L87 Difference]: Start difference. First operand 410 states and 415 transitions. Second operand 28 states. [2020-07-19 22:00:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:00:24,840 INFO L93 Difference]: Finished difference Result 428 states and 437 transitions. [2020-07-19 22:00:24,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-19 22:00:24,852 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 406 [2020-07-19 22:00:24,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:00:24,854 INFO L225 Difference]: With dead ends: 428 [2020-07-19 22:00:24,854 INFO L226 Difference]: Without dead ends: 426 [2020-07-19 22:00:24,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.3s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2020-07-19 22:00:24,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-07-19 22:00:24,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 425. [2020-07-19 22:00:24,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2020-07-19 22:00:24,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 434 transitions. [2020-07-19 22:00:24,872 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 434 transitions. Word has length 406 [2020-07-19 22:00:24,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:00:24,872 INFO L479 AbstractCegarLoop]: Abstraction has 425 states and 434 transitions. [2020-07-19 22:00:24,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-19 22:00:24,872 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 434 transitions. [2020-07-19 22:00:24,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-07-19 22:00:24,875 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:00:24,876 INFO L422 BasicCegarLoop]: trace histogram [72, 71, 71, 24, 24, 24, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:00:25,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 22:00:25,089 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:00:25,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:00:25,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1183105016, now seen corresponding path program 46 times [2020-07-19 22:00:25,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:00:25,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539572169] [2020-07-19 22:00:25,090 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 22:00:25,096 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 22:00:25,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973592558] [2020-07-19 22:00:25,097 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 22:00:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:00:25,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 99 conjunts are in the unsatisfiable core [2020-07-19 22:00:25,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 22:00:25,526 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 22:00:26,150 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-19 22:00:26,641 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 22:00:27,155 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 22:00:27,705 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 22:00:28,364 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 22:00:29,049 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 22:00:29,855 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 22:00:30,667 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 22:00:31,609 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 22:00:32,585 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 22:00:33,628 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 22:00:34,755 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 22:00:35,895 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 22:00:37,008 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 22:00:38,296 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 22:00:39,632 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 22:00:41,086 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 22:00:42,560 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 22:00:44,123 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 22:00:45,696 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 22:00:47,363 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 22:00:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 11439 backedges. 142 proven. 1357 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2020-07-19 22:00:50,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539572169] [2020-07-19 22:00:50,473 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 22:00:50,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973592558] [2020-07-19 22:00:50,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 22:00:50,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-07-19 22:00:50,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498541432] [2020-07-19 22:00:50,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-19 22:00:50,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:00:50,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-19 22:00:50,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-07-19 22:00:50,475 INFO L87 Difference]: Start difference. First operand 425 states and 434 transitions. Second operand 28 states. [2020-07-19 22:01:20,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:01:20,708 INFO L93 Difference]: Finished difference Result 432 states and 440 transitions. [2020-07-19 22:01:20,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-19 22:01:20,714 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 411 [2020-07-19 22:01:20,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:01:20,717 INFO L225 Difference]: With dead ends: 432 [2020-07-19 22:01:20,717 INFO L226 Difference]: Without dead ends: 427 [2020-07-19 22:01:20,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2020-07-19 22:01:20,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-07-19 22:01:20,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2020-07-19 22:01:20,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-07-19 22:01:20,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 432 transitions. [2020-07-19 22:01:20,734 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 432 transitions. Word has length 411 [2020-07-19 22:01:20,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:01:20,735 INFO L479 AbstractCegarLoop]: Abstraction has 427 states and 432 transitions. [2020-07-19 22:01:20,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-19 22:01:20,735 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 432 transitions. [2020-07-19 22:01:20,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-07-19 22:01:20,737 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:01:20,738 INFO L422 BasicCegarLoop]: trace histogram [74, 73, 73, 25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:01:20,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-07-19 22:01:20,951 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:01:20,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:01:20,951 INFO L82 PathProgramCache]: Analyzing trace with hash 491785402, now seen corresponding path program 47 times [2020-07-19 22:01:20,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:01:20,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337646401] [2020-07-19 22:01:20,952 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 [2020-07-19 22:01:20,958 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 22:01:20,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714909494] [2020-07-19 22:01:20,959 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52c1bae1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 22:01:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:01:21,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 153 conjunts are in the unsatisfiable core [2020-07-19 22:01:21,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 22:01:21,372 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 22:01:21,797 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-19 22:01:22,389 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-19 22:01:23,058 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-19 22:01:23,808 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-19 22:01:24,686 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-19 22:01:25,630 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 22:01:26,686 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 22:01:27,833 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 22:01:29,053 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 22:01:30,397 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-19 22:01:31,829 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 22:01:33,339 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 22:01:34,930 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 22:01:36,635 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 22:01:38,430 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 22:01:40,390 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 22:01:42,473 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 14