/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/ps4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:18:04,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:18:04,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:18:04,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:18:04,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:18:04,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:18:04,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:18:04,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:18:04,054 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:18:04,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:18:04,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:18:04,057 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:18:04,057 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:18:04,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:18:04,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:18:04,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:18:04,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:18:04,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:18:04,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:18:04,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:18:04,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:18:04,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:18:04,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:18:04,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:18:04,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:18:04,085 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:18:04,105 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:18:04,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:18:04,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:18:04,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:18:04,107 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:18:04,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:18:04,108 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:18:04,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:18:04,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:18:04,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:18:04,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:18:04,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:18:04,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:18:04,109 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:18:04,109 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:18:04,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:18:04,110 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:18:04,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:18:04,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:18:04,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:18:04,111 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:18:04,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:18:04,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:18:04,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:18:04,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:18:04,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:18:04,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:18:04,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:18:04,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:18:04,112 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:18:04,384 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:18:04,401 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:18:04,404 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:18:04,406 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:18:04,406 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:18:04,407 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps4.c [2019-11-23 22:18:04,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b7294080/7bbfccb07e7442489c5a345ab279ff00/FLAG66f092a8c [2019-11-23 22:18:04,865 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:18:04,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps4.c [2019-11-23 22:18:04,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b7294080/7bbfccb07e7442489c5a345ab279ff00/FLAG66f092a8c [2019-11-23 22:18:05,258 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b7294080/7bbfccb07e7442489c5a345ab279ff00 [2019-11-23 22:18:05,267 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:18:05,271 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:18:05,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:18:05,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:18:05,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:18:05,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:18:05" (1/1) ... [2019-11-23 22:18:05,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aa56da5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:05, skipping insertion in model container [2019-11-23 22:18:05,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:18:05" (1/1) ... [2019-11-23 22:18:05,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:18:05,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:18:05,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:18:05,490 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:18:05,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:18:05,522 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:18:05,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:05 WrapperNode [2019-11-23 22:18:05,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:18:05,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:18:05,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:18:05,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:18:05,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:05" (1/1) ... [2019-11-23 22:18:05,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:05" (1/1) ... [2019-11-23 22:18:05,626 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:18:05,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:18:05,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:18:05,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:18:05,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:05" (1/1) ... [2019-11-23 22:18:05,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:05" (1/1) ... [2019-11-23 22:18:05,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:05" (1/1) ... [2019-11-23 22:18:05,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:05" (1/1) ... [2019-11-23 22:18:05,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:05" (1/1) ... [2019-11-23 22:18:05,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:05" (1/1) ... [2019-11-23 22:18:05,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:05" (1/1) ... [2019-11-23 22:18:05,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:18:05,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:18:05,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:18:05,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:18:05,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:18:05,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:18:05,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:18:05,890 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:18:05,890 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 22:18:05,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:18:05 BoogieIcfgContainer [2019-11-23 22:18:05,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:18:05,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:18:05,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:18:05,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:18:05,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:18:05" (1/3) ... [2019-11-23 22:18:05,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263098ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:18:05, skipping insertion in model container [2019-11-23 22:18:05,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:05" (2/3) ... [2019-11-23 22:18:05,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263098ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:18:05, skipping insertion in model container [2019-11-23 22:18:05,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:18:05" (3/3) ... [2019-11-23 22:18:05,917 INFO L109 eAbstractionObserver]: Analyzing ICFG ps4.c [2019-11-23 22:18:05,933 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:18:05,943 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-23 22:18:05,967 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-23 22:18:05,993 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:18:05,993 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:18:05,993 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:18:05,994 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:18:05,994 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:18:05,994 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:18:05,994 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:18:05,995 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:18:06,017 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-23 22:18:06,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-23 22:18:06,024 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:06,025 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-23 22:18:06,026 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:06,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:06,032 INFO L82 PathProgramCache]: Analyzing trace with hash 963340, now seen corresponding path program 1 times [2019-11-23 22:18:06,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:06,042 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620818890] [2019-11-23 22:18:06,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:06,113 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:06,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087403953] [2019-11-23 22:18:06,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:06,154 WARN L253 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:18:06,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:06,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620818890] [2019-11-23 22:18:06,213 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:06,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087403953] [2019-11-23 22:18:06,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:18:06,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:18:06,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319109667] [2019-11-23 22:18:06,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:18:06,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:06,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:18:06,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:18:06,236 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 4 states. [2019-11-23 22:18:06,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:06,353 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2019-11-23 22:18:06,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:18:06,355 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-23 22:18:06,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:06,365 INFO L225 Difference]: With dead ends: 47 [2019-11-23 22:18:06,365 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 22:18:06,369 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:18:06,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 22:18:06,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-11-23 22:18:06,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 22:18:06,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-11-23 22:18:06,405 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 4 [2019-11-23 22:18:06,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:06,406 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-11-23 22:18:06,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:18:06,406 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-11-23 22:18:06,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 22:18:06,407 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:06,407 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-11-23 22:18:06,610 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:06,611 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:06,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:06,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1360983589, now seen corresponding path program 1 times [2019-11-23 22:18:06,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:06,613 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15648842] [2019-11-23 22:18:06,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:06,619 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:06,619 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056517300] [2019-11-23 22:18:06,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:06,650 WARN L253 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:18:06,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:06,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15648842] [2019-11-23 22:18:06,733 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:06,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056517300] [2019-11-23 22:18:06,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:06,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 22:18:06,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820558309] [2019-11-23 22:18:06,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:18:06,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:06,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:18:06,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:18:06,738 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2019-11-23 22:18:06,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:06,830 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-11-23 22:18:06,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:18:06,831 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2019-11-23 22:18:06,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:06,832 INFO L225 Difference]: With dead ends: 31 [2019-11-23 22:18:06,832 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:18:06,833 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:18:06,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:18:06,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2019-11-23 22:18:06,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 22:18:06,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-11-23 22:18:06,840 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 7 [2019-11-23 22:18:06,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:06,840 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-11-23 22:18:06,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:18:06,841 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-11-23 22:18:06,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:18:06,841 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:06,842 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:07,044 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:07,045 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:07,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:07,046 INFO L82 PathProgramCache]: Analyzing trace with hash -565940831, now seen corresponding path program 1 times [2019-11-23 22:18:07,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:07,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11040311] [2019-11-23 22:18:07,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:07,053 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:07,053 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244527989] [2019-11-23 22:18:07,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:07,078 WARN L253 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 22:18:07,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:07,253 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:07,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11040311] [2019-11-23 22:18:07,279 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:07,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244527989] [2019-11-23 22:18:07,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:07,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 22:18:07,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115693644] [2019-11-23 22:18:07,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:18:07,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:07,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:18:07,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:18:07,283 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2019-11-23 22:18:07,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:07,442 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-11-23 22:18:07,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:18:07,442 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2019-11-23 22:18:07,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:07,443 INFO L225 Difference]: With dead ends: 25 [2019-11-23 22:18:07,443 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 22:18:07,444 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:18:07,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 22:18:07,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-11-23 22:18:07,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 22:18:07,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-11-23 22:18:07,455 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 10 [2019-11-23 22:18:07,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:07,455 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-11-23 22:18:07,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:18:07,456 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-11-23 22:18:07,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:18:07,456 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:07,456 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2019-11-23 22:18:07,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:07,663 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:07,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:07,663 INFO L82 PathProgramCache]: Analyzing trace with hash -565900116, now seen corresponding path program 2 times [2019-11-23 22:18:07,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:07,664 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286751851] [2019-11-23 22:18:07,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:07,669 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:07,669 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752904209] [2019-11-23 22:18:07,670 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-23 22:18:07,697 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:18:07,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:07,698 WARN L253 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 22:18:07,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:07,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:07,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286751851] [2019-11-23 22:18:07,774 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:07,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752904209] [2019-11-23 22:18:07,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:07,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:18:07,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505765691] [2019-11-23 22:18:07,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:18:07,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:07,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:18:07,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:18:07,777 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2019-11-23 22:18:07,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:07,869 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-11-23 22:18:07,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:18:07,870 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-11-23 22:18:07,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:07,871 INFO L225 Difference]: With dead ends: 34 [2019-11-23 22:18:07,871 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 22:18:07,871 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:18:07,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 22:18:07,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2019-11-23 22:18:07,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:18:07,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-11-23 22:18:07,877 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 10 [2019-11-23 22:18:07,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:07,877 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-11-23 22:18:07,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:18:07,877 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-11-23 22:18:07,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:18:07,878 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:07,878 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1] [2019-11-23 22:18:08,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:08,088 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:08,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:08,089 INFO L82 PathProgramCache]: Analyzing trace with hash -978834128, now seen corresponding path program 2 times [2019-11-23 22:18:08,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:08,089 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010837526] [2019-11-23 22:18:08,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:08,093 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:08,094 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554165901] [2019-11-23 22:18:08,094 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:08,136 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:18:08,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:08,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 22:18:08,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:08,226 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:08,236 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010837526] [2019-11-23 22:18:08,236 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:08,236 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554165901] [2019-11-23 22:18:08,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:08,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:18:08,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889148164] [2019-11-23 22:18:08,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:18:08,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:08,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:18:08,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:18:08,238 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2019-11-23 22:18:08,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:08,400 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-11-23 22:18:08,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:18:08,401 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-11-23 22:18:08,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:08,402 INFO L225 Difference]: With dead ends: 28 [2019-11-23 22:18:08,402 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 22:18:08,403 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:18:08,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 22:18:08,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-11-23 22:18:08,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 22:18:08,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-11-23 22:18:08,408 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 13 [2019-11-23 22:18:08,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:08,409 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-11-23 22:18:08,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:18:08,409 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-11-23 22:18:08,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:18:08,409 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:08,410 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1] [2019-11-23 22:18:08,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:08,613 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:08,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:08,614 INFO L82 PathProgramCache]: Analyzing trace with hash -978793413, now seen corresponding path program 3 times [2019-11-23 22:18:08,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:08,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562512918] [2019-11-23 22:18:08,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:08,620 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:08,620 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024269996] [2019-11-23 22:18:08,620 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:08,646 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 22:18:08,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:08,647 WARN L253 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 22:18:08,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:08,750 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:08,864 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 22:18:08,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562512918] [2019-11-23 22:18:08,871 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:08,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024269996] [2019-11-23 22:18:08,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:08,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:18:08,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789727222] [2019-11-23 22:18:08,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:18:08,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:08,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:18:08,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:18:08,873 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 6 states. [2019-11-23 22:18:09,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:09,025 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-11-23 22:18:09,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:18:09,025 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-23 22:18:09,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:09,026 INFO L225 Difference]: With dead ends: 23 [2019-11-23 22:18:09,026 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 22:18:09,027 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:18:09,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 22:18:09,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-23 22:18:09,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 22:18:09,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-11-23 22:18:09,031 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2019-11-23 22:18:09,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:09,031 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-11-23 22:18:09,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:18:09,031 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-11-23 22:18:09,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:18:09,032 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:09,032 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2019-11-23 22:18:09,234 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:09,239 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:09,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:09,240 INFO L82 PathProgramCache]: Analyzing trace with hash -696709311, now seen corresponding path program 3 times [2019-11-23 22:18:09,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:09,241 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949975819] [2019-11-23 22:18:09,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:09,245 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:09,245 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1133927925] [2019-11-23 22:18:09,245 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:09,287 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:18:09,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:09,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 22:18:09,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:09,402 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:09,417 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:09,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949975819] [2019-11-23 22:18:09,417 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:09,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133927925] [2019-11-23 22:18:09,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:09,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 22:18:09,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879679517] [2019-11-23 22:18:09,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:18:09,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:09,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:18:09,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:18:09,420 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 10 states. [2019-11-23 22:18:09,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:09,553 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-11-23 22:18:09,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:18:09,554 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-11-23 22:18:09,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:09,555 INFO L225 Difference]: With dead ends: 24 [2019-11-23 22:18:09,555 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 22:18:09,556 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:18:09,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 22:18:09,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-23 22:18:09,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 22:18:09,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-11-23 22:18:09,561 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2019-11-23 22:18:09,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:09,562 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-11-23 22:18:09,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:18:09,562 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-11-23 22:18:09,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:18:09,562 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:09,562 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1] [2019-11-23 22:18:09,763 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:09,764 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:09,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:09,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1167284336, now seen corresponding path program 4 times [2019-11-23 22:18:09,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:09,765 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941251957] [2019-11-23 22:18:09,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:09,770 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:09,770 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164491696] [2019-11-23 22:18:09,770 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:09,804 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:18:09,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:09,805 WARN L253 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 52 conjunts are in the unsatisfiable core [2019-11-23 22:18:09,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:09,978 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:09,993 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:09,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941251957] [2019-11-23 22:18:09,994 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:09,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164491696] [2019-11-23 22:18:09,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:09,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-23 22:18:09,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426814838] [2019-11-23 22:18:09,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:18:09,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:09,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:18:09,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:18:09,996 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 13 states. [2019-11-23 22:18:10,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:10,254 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-11-23 22:18:10,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:18:10,256 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2019-11-23 22:18:10,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:10,257 INFO L225 Difference]: With dead ends: 28 [2019-11-23 22:18:10,258 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 22:18:10,258 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:18:10,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 22:18:10,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-11-23 22:18:10,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 22:18:10,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-11-23 22:18:10,263 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2019-11-23 22:18:10,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:10,264 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-11-23 22:18:10,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:18:10,264 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-11-23 22:18:10,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 22:18:10,265 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:10,265 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1] [2019-11-23 22:18:10,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:10,468 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:10,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:10,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1294599967, now seen corresponding path program 5 times [2019-11-23 22:18:10,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:10,469 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914771886] [2019-11-23 22:18:10,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:10,474 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:10,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881140433] [2019-11-23 22:18:10,474 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:10,529 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:18:10,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:10,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 22:18:10,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:10,628 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:10,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914771886] [2019-11-23 22:18:10,642 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:10,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881140433] [2019-11-23 22:18:10,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:10,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 22:18:10,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517417432] [2019-11-23 22:18:10,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:18:10,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:10,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:18:10,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:18:10,644 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 11 states. [2019-11-23 22:18:10,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:10,825 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-11-23 22:18:10,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:18:10,827 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2019-11-23 22:18:10,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:10,828 INFO L225 Difference]: With dead ends: 30 [2019-11-23 22:18:10,828 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 22:18:10,829 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:18:10,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 22:18:10,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-23 22:18:10,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 22:18:10,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-11-23 22:18:10,834 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2019-11-23 22:18:10,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:10,834 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-11-23 22:18:10,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:18:10,834 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-11-23 22:18:10,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 22:18:10,835 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:10,835 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1] [2019-11-23 22:18:11,038 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:11,039 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:11,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:11,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1698440720, now seen corresponding path program 6 times [2019-11-23 22:18:11,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:11,040 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810023994] [2019-11-23 22:18:11,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:11,045 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:11,045 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [525052802] [2019-11-23 22:18:11,045 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:11,120 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 22:18:11,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:11,121 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-23 22:18:11,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:11,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:11,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810023994] [2019-11-23 22:18:11,258 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:11,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525052802] [2019-11-23 22:18:11,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:11,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-23 22:18:11,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593589589] [2019-11-23 22:18:11,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:18:11,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:11,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:18:11,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:18:11,260 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 13 states. [2019-11-23 22:18:11,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:11,447 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-11-23 22:18:11,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:18:11,448 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2019-11-23 22:18:11,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:11,449 INFO L225 Difference]: With dead ends: 33 [2019-11-23 22:18:11,449 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:18:11,449 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:18:11,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:18:11,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-23 22:18:11,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 22:18:11,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-11-23 22:18:11,454 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2019-11-23 22:18:11,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:11,454 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-11-23 22:18:11,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:18:11,455 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-11-23 22:18:11,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 22:18:11,455 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:11,455 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1] [2019-11-23 22:18:11,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:11,663 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:11,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:11,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1980050049, now seen corresponding path program 7 times [2019-11-23 22:18:11,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:11,664 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560933230] [2019-11-23 22:18:11,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:11,669 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:11,669 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67001391] [2019-11-23 22:18:11,669 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:11,713 WARN L253 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 65 conjunts are in the unsatisfiable core [2019-11-23 22:18:11,715 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:12,006 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:12,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560933230] [2019-11-23 22:18:12,024 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:12,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67001391] [2019-11-23 22:18:12,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:12,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-23 22:18:12,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910011173] [2019-11-23 22:18:12,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:18:12,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:12,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:18:12,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:18:12,026 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2019-11-23 22:18:12,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:12,415 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-11-23 22:18:12,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:18:12,416 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2019-11-23 22:18:12,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:12,417 INFO L225 Difference]: With dead ends: 37 [2019-11-23 22:18:12,417 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 22:18:12,418 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:18:12,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 22:18:12,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-11-23 22:18:12,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 22:18:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-11-23 22:18:12,424 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2019-11-23 22:18:12,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:12,424 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-11-23 22:18:12,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:18:12,424 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-11-23 22:18:12,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 22:18:12,425 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:12,425 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1] [2019-11-23 22:18:12,626 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:12,627 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:12,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:12,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1807991888, now seen corresponding path program 8 times [2019-11-23 22:18:12,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:12,628 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084142679] [2019-11-23 22:18:12,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:12,633 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:12,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780288673] [2019-11-23 22:18:12,634 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:12,678 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:18:12,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:12,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 48 conjunts are in the unsatisfiable core [2019-11-23 22:18:12,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:12,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:12,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084142679] [2019-11-23 22:18:12,904 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:12,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780288673] [2019-11-23 22:18:12,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:12,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-23 22:18:12,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713623978] [2019-11-23 22:18:12,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:18:12,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:12,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:18:12,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:18:12,906 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 14 states. [2019-11-23 22:18:13,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:13,173 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-11-23 22:18:13,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:18:13,174 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2019-11-23 22:18:13,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:13,174 INFO L225 Difference]: With dead ends: 40 [2019-11-23 22:18:13,175 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:18:13,175 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:18:13,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:18:13,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-23 22:18:13,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 22:18:13,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-11-23 22:18:13,181 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2019-11-23 22:18:13,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:13,181 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-11-23 22:18:13,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:18:13,182 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-11-23 22:18:13,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 22:18:13,182 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:13,183 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1] [2019-11-23 22:18:13,385 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:13,386 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:13,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:13,386 INFO L82 PathProgramCache]: Analyzing trace with hash -80698335, now seen corresponding path program 9 times [2019-11-23 22:18:13,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:13,387 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135956777] [2019-11-23 22:18:13,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:13,392 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:13,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904199585] [2019-11-23 22:18:13,393 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:13,561 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 22:18:13,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:13,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 54 conjunts are in the unsatisfiable core [2019-11-23 22:18:13,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:13,755 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:13,799 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:13,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135956777] [2019-11-23 22:18:13,800 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:13,800 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904199585] [2019-11-23 22:18:13,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:13,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-11-23 22:18:13,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129618354] [2019-11-23 22:18:13,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:18:13,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:13,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:18:13,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:18:13,802 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 16 states. [2019-11-23 22:18:14,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:14,132 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-11-23 22:18:14,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:18:14,132 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2019-11-23 22:18:14,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:14,133 INFO L225 Difference]: With dead ends: 42 [2019-11-23 22:18:14,134 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 22:18:14,135 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:18:14,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 22:18:14,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-23 22:18:14,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 22:18:14,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-11-23 22:18:14,142 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2019-11-23 22:18:14,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:14,142 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-11-23 22:18:14,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:18:14,142 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-11-23 22:18:14,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 22:18:14,143 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:14,143 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1] [2019-11-23 22:18:14,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:14,347 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:14,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:14,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1979554128, now seen corresponding path program 10 times [2019-11-23 22:18:14,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:14,349 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449179565] [2019-11-23 22:18:14,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:14,353 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:14,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810839875] [2019-11-23 22:18:14,353 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:14,413 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:18:14,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:14,415 WARN L253 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 78 conjunts are in the unsatisfiable core [2019-11-23 22:18:14,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:14,513 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:14,726 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:14,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449179565] [2019-11-23 22:18:14,753 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:14,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810839875] [2019-11-23 22:18:14,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:14,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-11-23 22:18:14,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793167263] [2019-11-23 22:18:14,754 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:18:14,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:14,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:18:14,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:18:14,755 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 20 states. [2019-11-23 22:18:15,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:15,360 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-11-23 22:18:15,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:18:15,360 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2019-11-23 22:18:15,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:15,361 INFO L225 Difference]: With dead ends: 46 [2019-11-23 22:18:15,362 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 22:18:15,363 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:18:15,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 22:18:15,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-23 22:18:15,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 22:18:15,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-11-23 22:18:15,369 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2019-11-23 22:18:15,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:15,369 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-11-23 22:18:15,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:18:15,370 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-11-23 22:18:15,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 22:18:15,370 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:15,371 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1] [2019-11-23 22:18:15,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:15,574 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:15,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:15,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1778227775, now seen corresponding path program 11 times [2019-11-23 22:18:15,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:15,575 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547638479] [2019-11-23 22:18:15,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:15,578 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:15,579 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658363798] [2019-11-23 22:18:15,579 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:15,681 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 22:18:15,681 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:15,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 60 conjunts are in the unsatisfiable core [2019-11-23 22:18:15,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:15,882 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:15,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547638479] [2019-11-23 22:18:15,905 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:15,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658363798] [2019-11-23 22:18:15,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:15,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-11-23 22:18:15,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729473093] [2019-11-23 22:18:15,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:18:15,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:15,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:18:15,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:18:15,907 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 17 states. [2019-11-23 22:18:16,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:16,238 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-11-23 22:18:16,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:18:16,239 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2019-11-23 22:18:16,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:16,239 INFO L225 Difference]: With dead ends: 48 [2019-11-23 22:18:16,240 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 22:18:16,240 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:18:16,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 22:18:16,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-23 22:18:16,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 22:18:16,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-11-23 22:18:16,247 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2019-11-23 22:18:16,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:16,248 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-11-23 22:18:16,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:18:16,248 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-11-23 22:18:16,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 22:18:16,249 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:16,249 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1] [2019-11-23 22:18:16,456 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:16,456 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:16,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:16,457 INFO L82 PathProgramCache]: Analyzing trace with hash 160809232, now seen corresponding path program 12 times [2019-11-23 22:18:16,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:16,458 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898780100] [2019-11-23 22:18:16,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:16,463 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:16,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517799863] [2019-11-23 22:18:16,467 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:16,580 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 22:18:16,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:16,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 66 conjunts are in the unsatisfiable core [2019-11-23 22:18:16,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:16,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:16,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898780100] [2019-11-23 22:18:16,819 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:16,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517799863] [2019-11-23 22:18:16,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:16,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-11-23 22:18:16,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225046522] [2019-11-23 22:18:16,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:18:16,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:16,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:18:16,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:18:16,821 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 19 states. [2019-11-23 22:18:17,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:17,260 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-11-23 22:18:17,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:18:17,260 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2019-11-23 22:18:17,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:17,261 INFO L225 Difference]: With dead ends: 51 [2019-11-23 22:18:17,261 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 22:18:17,262 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:18:17,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 22:18:17,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-23 22:18:17,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 22:18:17,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-11-23 22:18:17,268 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2019-11-23 22:18:17,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:17,269 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-11-23 22:18:17,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:18:17,269 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-11-23 22:18:17,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 22:18:17,269 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:17,270 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1] [2019-11-23 22:18:17,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:17,474 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:17,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:17,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1297846431, now seen corresponding path program 13 times [2019-11-23 22:18:17,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:17,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907419515] [2019-11-23 22:18:17,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:17,479 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:17,480 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028764912] [2019-11-23 22:18:17,480 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:17,527 WARN L253 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 101 conjunts are in the unsatisfiable core [2019-11-23 22:18:17,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:17,924 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:17,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907419515] [2019-11-23 22:18:17,973 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:17,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028764912] [2019-11-23 22:18:17,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:17,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-11-23 22:18:17,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462530744] [2019-11-23 22:18:17,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:18:17,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:17,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:18:17,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:18:17,975 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 21 states. [2019-11-23 22:18:18,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:18,872 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2019-11-23 22:18:18,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:18:18,872 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2019-11-23 22:18:18,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:18,873 INFO L225 Difference]: With dead ends: 55 [2019-11-23 22:18:18,873 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 22:18:18,875 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=1084, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:18:18,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 22:18:18,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-11-23 22:18:18,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 22:18:18,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-11-23 22:18:18,882 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2019-11-23 22:18:18,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:18,882 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-11-23 22:18:18,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:18:18,882 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-11-23 22:18:18,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 22:18:18,883 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:18,883 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1] [2019-11-23 22:18:19,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:19,087 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:19,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:19,088 INFO L82 PathProgramCache]: Analyzing trace with hash 370398064, now seen corresponding path program 14 times [2019-11-23 22:18:19,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:19,088 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767563591] [2019-11-23 22:18:19,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:19,092 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:19,093 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180872177] [2019-11-23 22:18:19,093 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:19,142 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:18:19,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:19,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 72 conjunts are in the unsatisfiable core [2019-11-23 22:18:19,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:21,352 WARN L860 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~y~0 14) (< 13 c_ULTIMATE.start_main_~k~0) (<= c_ULTIMATE.start_main_~c~0 14) (or (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond) (and (= 0 (mod (let ((.cse0 (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (+ (* .cse0 3) (* (* (* (* c_ULTIMATE.start_main_~y~0 2) c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) 3) (* (* (* .cse0 c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) 3))) (- 4))) (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond)))) is different from true [2019-11-23 22:18:21,353 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:21,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:21,435 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 14 not checked. [2019-11-23 22:18:21,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767563591] [2019-11-23 22:18:21,436 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:21,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180872177] [2019-11-23 22:18:21,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:21,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-11-23 22:18:21,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310714834] [2019-11-23 22:18:21,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:18:21,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:21,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:18:21,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=308, Unknown=1, NotChecked=34, Total=380 [2019-11-23 22:18:21,438 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 20 states. [2019-11-23 22:18:21,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:21,895 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2019-11-23 22:18:21,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:18:21,896 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2019-11-23 22:18:21,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:21,897 INFO L225 Difference]: With dead ends: 57 [2019-11-23 22:18:21,897 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 22:18:21,898 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=47, Invalid=376, Unknown=1, NotChecked=38, Total=462 [2019-11-23 22:18:21,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 22:18:21,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-23 22:18:21,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 22:18:21,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2019-11-23 22:18:21,905 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2019-11-23 22:18:21,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:21,905 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2019-11-23 22:18:21,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:18:21,906 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2019-11-23 22:18:21,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 22:18:21,907 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:21,907 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1] [2019-11-23 22:18:22,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:22,111 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:22,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:22,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1975566593, now seen corresponding path program 15 times [2019-11-23 22:18:22,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:22,112 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55043618] [2019-11-23 22:18:22,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:22,121 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:22,121 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6453425] [2019-11-23 22:18:22,121 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:22,316 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-23 22:18:22,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:22,318 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 78 conjunts are in the unsatisfiable core [2019-11-23 22:18:22,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:22,565 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:22,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55043618] [2019-11-23 22:18:22,586 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:22,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6453425] [2019-11-23 22:18:22,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:22,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-11-23 22:18:22,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679003004] [2019-11-23 22:18:22,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 22:18:22,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:22,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 22:18:22,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:18:22,587 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 22 states. [2019-11-23 22:18:23,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:23,137 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2019-11-23 22:18:23,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 22:18:23,138 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2019-11-23 22:18:23,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:23,139 INFO L225 Difference]: With dead ends: 60 [2019-11-23 22:18:23,139 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 22:18:23,139 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:18:23,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 22:18:23,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-23 22:18:23,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 22:18:23,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2019-11-23 22:18:23,146 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2019-11-23 22:18:23,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:23,146 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2019-11-23 22:18:23,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 22:18:23,146 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2019-11-23 22:18:23,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 22:18:23,148 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:23,148 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1] [2019-11-23 22:18:23,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:23,353 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:23,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:23,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1385340368, now seen corresponding path program 16 times [2019-11-23 22:18:23,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:23,354 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659983709] [2019-11-23 22:18:23,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:23,358 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:23,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642589003] [2019-11-23 22:18:23,359 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:23,418 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:18:23,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:23,422 WARN L253 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 110 conjunts are in the unsatisfiable core [2019-11-23 22:18:23,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:23,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:23,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:23,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659983709] [2019-11-23 22:18:23,931 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:23,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642589003] [2019-11-23 22:18:23,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:23,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-11-23 22:18:23,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549791445] [2019-11-23 22:18:23,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 22:18:23,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:23,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 22:18:23,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=595, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:18:23,933 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 26 states. [2019-11-23 22:18:25,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:25,042 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2019-11-23 22:18:25,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 22:18:25,042 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2019-11-23 22:18:25,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:25,043 INFO L225 Difference]: With dead ends: 64 [2019-11-23 22:18:25,043 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 22:18:25,045 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=120, Invalid=1440, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:18:25,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 22:18:25,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-11-23 22:18:25,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 22:18:25,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2019-11-23 22:18:25,066 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2019-11-23 22:18:25,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:25,066 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2019-11-23 22:18:25,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 22:18:25,066 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2019-11-23 22:18:25,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-23 22:18:25,070 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:25,070 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1] [2019-11-23 22:18:25,274 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:25,274 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:25,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:25,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1551981217, now seen corresponding path program 17 times [2019-11-23 22:18:25,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:25,275 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194270780] [2019-11-23 22:18:25,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:25,282 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:25,282 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574026961] [2019-11-23 22:18:25,286 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:25,801 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 22:18:25,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:25,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 84 conjunts are in the unsatisfiable core [2019-11-23 22:18:25,805 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:26,191 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:26,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194270780] [2019-11-23 22:18:26,228 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:26,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574026961] [2019-11-23 22:18:26,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:26,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-11-23 22:18:26,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493182229] [2019-11-23 22:18:26,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:18:26,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:26,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:18:26,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:18:26,235 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 23 states. [2019-11-23 22:18:26,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:26,843 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2019-11-23 22:18:26,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 22:18:26,844 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 58 [2019-11-23 22:18:26,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:26,845 INFO L225 Difference]: With dead ends: 66 [2019-11-23 22:18:26,845 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 22:18:26,846 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:18:26,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 22:18:26,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-23 22:18:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 22:18:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2019-11-23 22:18:26,853 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 58 [2019-11-23 22:18:26,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:26,853 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2019-11-23 22:18:26,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:18:26,853 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2019-11-23 22:18:26,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 22:18:26,854 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:26,854 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1] [2019-11-23 22:18:27,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:27,057 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:27,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:27,058 INFO L82 PathProgramCache]: Analyzing trace with hash 967319600, now seen corresponding path program 18 times [2019-11-23 22:18:27,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:27,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585254197] [2019-11-23 22:18:27,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:27,064 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:27,064 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665757442] [2019-11-23 22:18:27,064 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:27,667 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 22:18:27,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:27,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 94 conjunts are in the unsatisfiable core [2019-11-23 22:18:27,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:27,962 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:27,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585254197] [2019-11-23 22:18:27,988 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:27,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665757442] [2019-11-23 22:18:27,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:27,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-11-23 22:18:27,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262132796] [2019-11-23 22:18:27,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:18:27,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:27,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:18:27,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:18:27,990 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 24 states. [2019-11-23 22:18:28,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:28,685 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2019-11-23 22:18:28,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 22:18:28,687 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 61 [2019-11-23 22:18:28,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:28,688 INFO L225 Difference]: With dead ends: 69 [2019-11-23 22:18:28,689 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 22:18:28,690 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:18:28,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 22:18:28,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-11-23 22:18:28,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 22:18:28,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2019-11-23 22:18:28,696 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 61 [2019-11-23 22:18:28,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:28,697 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2019-11-23 22:18:28,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:18:28,697 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2019-11-23 22:18:28,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 22:18:28,698 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:28,698 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1] [2019-11-23 22:18:28,898 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:28,898 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:28,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:28,899 INFO L82 PathProgramCache]: Analyzing trace with hash -594527167, now seen corresponding path program 19 times [2019-11-23 22:18:28,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:28,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263884282] [2019-11-23 22:18:28,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:28,910 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:28,911 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765120419] [2019-11-23 22:18:28,911 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:28,973 WARN L253 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 137 conjunts are in the unsatisfiable core [2019-11-23 22:18:28,975 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:29,565 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:29,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263884282] [2019-11-23 22:18:29,607 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:29,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765120419] [2019-11-23 22:18:29,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:29,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-11-23 22:18:29,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770983816] [2019-11-23 22:18:29,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:18:29,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:29,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:18:29,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=646, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:18:29,608 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 27 states. [2019-11-23 22:18:31,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:31,258 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2019-11-23 22:18:31,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 22:18:31,258 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2019-11-23 22:18:31,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:31,259 INFO L225 Difference]: With dead ends: 73 [2019-11-23 22:18:31,259 INFO L226 Difference]: Without dead ends: 69 [2019-11-23 22:18:31,261 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=142, Invalid=2020, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 22:18:31,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-23 22:18:31,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-11-23 22:18:31,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 22:18:31,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2019-11-23 22:18:31,267 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 64 [2019-11-23 22:18:31,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:31,267 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2019-11-23 22:18:31,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:18:31,267 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2019-11-23 22:18:31,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 22:18:31,268 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:31,268 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1] [2019-11-23 22:18:31,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:31,471 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:31,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:31,472 INFO L82 PathProgramCache]: Analyzing trace with hash 2104122000, now seen corresponding path program 20 times [2019-11-23 22:18:31,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:31,473 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390168420] [2019-11-23 22:18:31,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:31,482 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:31,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328220975] [2019-11-23 22:18:31,483 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:31,550 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:18:31,550 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:31,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 96 conjunts are in the unsatisfiable core [2019-11-23 22:18:31,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:33,860 WARN L860 $PredicateComparison]: unable to prove that (and (<= c_ULTIMATE.start_main_~c~0 20) (< 19 c_ULTIMATE.start_main_~k~0) (or (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond) (and (= 0 (mod (let ((.cse0 (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (+ (* .cse0 3) (* (* (* (* c_ULTIMATE.start_main_~y~0 2) c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) 3) (* (* (* .cse0 c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) 3))) (- 4))) (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond))) (= 20 c_ULTIMATE.start_main_~y~0)) is different from true [2019-11-23 22:18:33,860 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:35,862 WARN L860 $PredicateComparison]: unable to prove that (and (= 0 (mod (let ((.cse0 (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (+ (* .cse0 3) (* (* (* (* c_ULTIMATE.start_main_~y~0 2) c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) 3) (* (* (* .cse0 c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) 3))) (- 4))) (<= c_ULTIMATE.start_main_~c~0 20) (< 19 c_ULTIMATE.start_main_~k~0) (= 20 c_ULTIMATE.start_main_~y~0)) is different from true [2019-11-23 22:18:37,865 WARN L860 $PredicateComparison]: unable to prove that (and (= 0 (mod (let ((.cse0 (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (+ (* .cse0 3) (* (* (* (* c_ULTIMATE.start_main_~y~0 2) c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) 3) (* (* (* .cse0 c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) 3))) (- 4))) (< 19 c_ULTIMATE.start_main_~k~0) (= 20 c_ULTIMATE.start_main_~y~0) (<= c_ULTIMATE.start_main_~k~0 20)) is different from true [2019-11-23 22:18:37,866 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 40 not checked. [2019-11-23 22:18:37,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390168420] [2019-11-23 22:18:37,899 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:37,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328220975] [2019-11-23 22:18:37,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:37,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-11-23 22:18:37,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711795904] [2019-11-23 22:18:37,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:18:37,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:37,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:18:37,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=510, Unknown=3, NotChecked=138, Total=702 [2019-11-23 22:18:37,901 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 27 states. [2019-11-23 22:18:38,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:38,572 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2019-11-23 22:18:38,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:18:38,573 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 67 [2019-11-23 22:18:38,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:38,574 INFO L225 Difference]: With dead ends: 75 [2019-11-23 22:18:38,574 INFO L226 Difference]: Without dead ends: 71 [2019-11-23 22:18:38,575 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=51, Invalid=510, Unknown=3, NotChecked=138, Total=702 [2019-11-23 22:18:38,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-23 22:18:38,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-11-23 22:18:38,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-23 22:18:38,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2019-11-23 22:18:38,582 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 67 [2019-11-23 22:18:38,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:38,582 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2019-11-23 22:18:38,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:18:38,582 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2019-11-23 22:18:38,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 22:18:38,583 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:38,583 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1] [2019-11-23 22:18:38,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:38,786 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:38,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:38,787 INFO L82 PathProgramCache]: Analyzing trace with hash 68642273, now seen corresponding path program 21 times [2019-11-23 22:18:38,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:38,787 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208916953] [2019-11-23 22:18:38,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:38,792 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:38,792 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013211759] [2019-11-23 22:18:38,792 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:39,243 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-11-23 22:18:39,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:39,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 102 conjunts are in the unsatisfiable core [2019-11-23 22:18:39,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:39,733 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:39,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208916953] [2019-11-23 22:18:39,774 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:39,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013211759] [2019-11-23 22:18:39,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:39,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-11-23 22:18:39,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701510093] [2019-11-23 22:18:39,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:18:39,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:39,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:18:39,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=700, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:18:39,776 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 28 states. [2019-11-23 22:18:40,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:40,689 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2019-11-23 22:18:40,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 22:18:40,690 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 70 [2019-11-23 22:18:40,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:40,691 INFO L225 Difference]: With dead ends: 78 [2019-11-23 22:18:40,691 INFO L226 Difference]: Without dead ends: 74 [2019-11-23 22:18:40,692 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:18:40,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-23 22:18:40,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-11-23 22:18:40,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 22:18:40,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2019-11-23 22:18:40,697 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 70 [2019-11-23 22:18:40,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:40,697 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2019-11-23 22:18:40,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:18:40,697 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2019-11-23 22:18:40,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-23 22:18:40,698 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:40,698 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1] [2019-11-23 22:18:40,898 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:40,899 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:40,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:40,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1735347440, now seen corresponding path program 22 times [2019-11-23 22:18:40,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:40,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368886616] [2019-11-23 22:18:40,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:40,904 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:40,905 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [50588389] [2019-11-23 22:18:40,905 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:41,008 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:18:41,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:41,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 104 conjunts are in the unsatisfiable core [2019-11-23 22:18:41,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:41,380 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:41,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368886616] [2019-11-23 22:18:41,409 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:41,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50588389] [2019-11-23 22:18:41,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:41,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-11-23 22:18:41,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38853686] [2019-11-23 22:18:41,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:18:41,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:41,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:18:41,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:18:41,410 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 28 states. [2019-11-23 22:18:42,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:42,377 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2019-11-23 22:18:42,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 22:18:42,379 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 73 [2019-11-23 22:18:42,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:42,380 INFO L225 Difference]: With dead ends: 81 [2019-11-23 22:18:42,380 INFO L226 Difference]: Without dead ends: 77 [2019-11-23 22:18:42,381 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=919, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:18:42,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-23 22:18:42,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-11-23 22:18:42,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 22:18:42,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2019-11-23 22:18:42,385 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 73 [2019-11-23 22:18:42,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:42,385 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2019-11-23 22:18:42,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:18:42,385 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2019-11-23 22:18:42,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 22:18:42,386 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:42,386 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1] [2019-11-23 22:18:42,586 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:42,587 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:42,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:42,587 INFO L82 PathProgramCache]: Analyzing trace with hash 432068481, now seen corresponding path program 23 times [2019-11-23 22:18:42,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:42,588 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833044816] [2019-11-23 22:18:42,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:42,593 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:42,593 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898821359] [2019-11-23 22:18:42,593 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:43,495 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 22:18:43,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:43,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 108 conjunts are in the unsatisfiable core [2019-11-23 22:18:43,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:43,899 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:43,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833044816] [2019-11-23 22:18:43,930 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:43,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898821359] [2019-11-23 22:18:43,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:43,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-11-23 22:18:43,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13081139] [2019-11-23 22:18:43,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 22:18:43,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:43,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 22:18:43,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:18:43,931 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 29 states. [2019-11-23 22:18:44,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:44,959 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2019-11-23 22:18:44,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 22:18:44,959 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 76 [2019-11-23 22:18:44,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:44,960 INFO L225 Difference]: With dead ends: 84 [2019-11-23 22:18:44,960 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 22:18:44,961 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=981, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:18:44,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 22:18:44,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-11-23 22:18:44,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 22:18:44,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2019-11-23 22:18:44,968 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 76 [2019-11-23 22:18:44,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:44,969 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2019-11-23 22:18:44,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 22:18:44,969 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2019-11-23 22:18:44,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 22:18:44,970 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:44,970 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1] [2019-11-23 22:18:45,173 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:45,173 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:45,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:45,174 INFO L82 PathProgramCache]: Analyzing trace with hash 952956752, now seen corresponding path program 24 times [2019-11-23 22:18:45,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:45,175 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33177760] [2019-11-23 22:18:45,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:45,179 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:45,179 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2129795586] [2019-11-23 22:18:45,179 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:46,431 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-23 22:18:46,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:46,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 118 conjunts are in the unsatisfiable core [2019-11-23 22:18:46,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:46,889 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:46,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33177760] [2019-11-23 22:18:46,926 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:46,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129795586] [2019-11-23 22:18:46,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:46,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-11-23 22:18:46,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366647825] [2019-11-23 22:18:46,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 22:18:46,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:46,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 22:18:46,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:18:46,928 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 30 states. [2019-11-23 22:18:48,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:48,035 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2019-11-23 22:18:48,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 22:18:48,036 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 79 [2019-11-23 22:18:48,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:48,037 INFO L225 Difference]: With dead ends: 87 [2019-11-23 22:18:48,037 INFO L226 Difference]: Without dead ends: 83 [2019-11-23 22:18:48,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=1045, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:18:48,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-23 22:18:48,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-11-23 22:18:48,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-23 22:18:48,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2019-11-23 22:18:48,043 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 79 [2019-11-23 22:18:48,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:48,044 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2019-11-23 22:18:48,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 22:18:48,044 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2019-11-23 22:18:48,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-23 22:18:48,044 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:48,045 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1] [2019-11-23 22:18:48,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:48,245 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:48,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:48,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1018597665, now seen corresponding path program 25 times [2019-11-23 22:18:48,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:48,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853294249] [2019-11-23 22:18:48,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:48,252 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:48,252 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434371797] [2019-11-23 22:18:48,252 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:48,331 WARN L253 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 173 conjunts are in the unsatisfiable core [2019-11-23 22:18:48,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:49,413 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:49,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853294249] [2019-11-23 22:18:49,488 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:49,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434371797] [2019-11-23 22:18:49,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:49,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-11-23 22:18:49,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974163329] [2019-11-23 22:18:49,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 22:18:49,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:49,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 22:18:49,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=988, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:18:49,490 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 33 states. [2019-11-23 22:18:52,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:52,390 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2019-11-23 22:18:52,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 22:18:52,391 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 82 [2019-11-23 22:18:52,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:52,392 INFO L225 Difference]: With dead ends: 91 [2019-11-23 22:18:52,392 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 22:18:52,394 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=178, Invalid=3244, Unknown=0, NotChecked=0, Total=3422 [2019-11-23 22:18:52,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 22:18:52,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-23 22:18:52,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 22:18:52,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2019-11-23 22:18:52,402 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 82 [2019-11-23 22:18:52,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:52,402 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2019-11-23 22:18:52,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 22:18:52,402 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2019-11-23 22:18:52,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 22:18:52,403 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:52,403 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1, 1, 1] [2019-11-23 22:18:52,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:52,607 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:52,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:52,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1978050128, now seen corresponding path program 26 times [2019-11-23 22:18:52,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:52,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889904284] [2019-11-23 22:18:52,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:52,612 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:52,612 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253678522] [2019-11-23 22:18:52,613 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:52,693 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:18:52,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:52,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 120 conjunts are in the unsatisfiable core [2019-11-23 22:18:52,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:53,204 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 0 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:53,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889904284] [2019-11-23 22:18:53,246 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:53,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253678522] [2019-11-23 22:18:53,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:53,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-11-23 22:18:53,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086987710] [2019-11-23 22:18:53,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 22:18:53,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:53,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 22:18:53,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:18:53,247 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 32 states. [2019-11-23 22:18:54,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:54,502 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2019-11-23 22:18:54,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 22:18:54,503 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 85 [2019-11-23 22:18:54,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:54,504 INFO L225 Difference]: With dead ends: 94 [2019-11-23 22:18:54,504 INFO L226 Difference]: Without dead ends: 90 [2019-11-23 22:18:54,505 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=1048, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:18:54,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-23 22:18:54,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-11-23 22:18:54,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-23 22:18:54,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2019-11-23 22:18:54,512 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 85 [2019-11-23 22:18:54,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:54,512 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2019-11-23 22:18:54,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 22:18:54,513 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2019-11-23 22:18:54,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-23 22:18:54,513 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:54,513 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1, 1, 1] [2019-11-23 22:18:54,716 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:54,717 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:54,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:54,717 INFO L82 PathProgramCache]: Analyzing trace with hash 77763265, now seen corresponding path program 27 times [2019-11-23 22:18:54,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:54,718 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168525869] [2019-11-23 22:18:54,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:54,723 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:54,723 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370814585] [2019-11-23 22:18:54,723 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:55,457 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-11-23 22:18:55,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:55,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 126 conjunts are in the unsatisfiable core [2019-11-23 22:18:55,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:56,136 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:56,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:56,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168525869] [2019-11-23 22:18:56,208 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:56,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370814585] [2019-11-23 22:18:56,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:56,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-11-23 22:18:56,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839844497] [2019-11-23 22:18:56,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 22:18:56,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:56,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 22:18:56,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1054, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:18:56,211 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 34 states. [2019-11-23 22:18:57,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:57,629 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2019-11-23 22:18:57,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 22:18:57,629 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 88 [2019-11-23 22:18:57,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:57,630 INFO L225 Difference]: With dead ends: 96 [2019-11-23 22:18:57,630 INFO L226 Difference]: Without dead ends: 92 [2019-11-23 22:18:57,631 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=1318, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:18:57,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-23 22:18:57,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-11-23 22:18:57,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 22:18:57,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2019-11-23 22:18:57,637 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 88 [2019-11-23 22:18:57,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:57,637 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2019-11-23 22:18:57,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 22:18:57,637 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2019-11-23 22:18:57,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 22:18:57,638 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:57,638 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1, 1, 1] [2019-11-23 22:18:57,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:57,840 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:57,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:57,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1419086832, now seen corresponding path program 28 times [2019-11-23 22:18:57,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:57,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260640459] [2019-11-23 22:18:57,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:57,847 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:57,847 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586376089] [2019-11-23 22:18:57,847 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:19:11,118 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:19:11,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:19:11,121 INFO L255 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 128 conjunts are in the unsatisfiable core [2019-11-23 22:19:11,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:19:11,656 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 0 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:19:11,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260640459] [2019-11-23 22:19:11,702 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:19:11,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586376089] [2019-11-23 22:19:11,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:19:11,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-11-23 22:19:11,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833839443] [2019-11-23 22:19:11,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 22:19:11,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:19:11,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 22:19:11,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:19:11,704 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 34 states. [2019-11-23 22:19:13,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:19:13,092 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2019-11-23 22:19:13,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 22:19:13,093 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 91 [2019-11-23 22:19:13,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:19:13,094 INFO L225 Difference]: With dead ends: 99 [2019-11-23 22:19:13,094 INFO L226 Difference]: Without dead ends: 95 [2019-11-23 22:19:13,094 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=1321, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:19:13,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-23 22:19:13,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2019-11-23 22:19:13,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-23 22:19:13,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2019-11-23 22:19:13,102 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 91 [2019-11-23 22:19:13,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:19:13,102 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2019-11-23 22:19:13,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 22:19:13,103 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2019-11-23 22:19:13,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-23 22:19:13,103 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:19:13,103 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1, 1, 1] [2019-11-23 22:19:13,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:19:13,306 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:19:13,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:19:13,307 INFO L82 PathProgramCache]: Analyzing trace with hash 565107809, now seen corresponding path program 29 times [2019-11-23 22:19:13,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:19:13,308 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028822945] [2019-11-23 22:19:13,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:19:13,312 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:19:13,312 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374008108] [2019-11-23 22:19:13,313 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:19:14,609 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-11-23 22:19:14,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:19:14,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 132 conjunts are in the unsatisfiable core [2019-11-23 22:19:14,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:19:15,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:19:15,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028822945] [2019-11-23 22:19:15,383 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:19:15,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374008108] [2019-11-23 22:19:15,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:19:15,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-11-23 22:19:15,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467899962] [2019-11-23 22:19:15,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 22:19:15,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:19:15,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 22:19:15,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:19:15,385 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 35 states. [2019-11-23 22:19:16,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:19:16,836 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2019-11-23 22:19:16,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 22:19:16,836 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 94 [2019-11-23 22:19:16,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:19:16,837 INFO L225 Difference]: With dead ends: 102 [2019-11-23 22:19:16,838 INFO L226 Difference]: Without dead ends: 98 [2019-11-23 22:19:16,839 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=1395, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:19:16,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-23 22:19:16,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-11-23 22:19:16,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-23 22:19:16,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2019-11-23 22:19:16,847 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 94 [2019-11-23 22:19:16,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:19:16,848 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2019-11-23 22:19:16,848 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 22:19:16,848 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2019-11-23 22:19:16,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-23 22:19:16,849 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:19:16,849 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1, 1, 1] [2019-11-23 22:19:17,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:19:17,053 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:19:17,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:19:17,054 INFO L82 PathProgramCache]: Analyzing trace with hash 72762992, now seen corresponding path program 30 times [2019-11-23 22:19:17,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:19:17,054 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182808181] [2019-11-23 22:19:17,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:19:17,059 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:19:17,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062533776] [2019-11-23 22:19:17,059 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:19:18,628 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-11-23 22:19:18,629 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:19:18,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 138 conjunts are in the unsatisfiable core [2019-11-23 22:19:18,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:19:19,450 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 0 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:19:19,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182808181] [2019-11-23 22:19:19,491 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:19:19,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062533776] [2019-11-23 22:19:19,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:19:19,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-11-23 22:19:19,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694027822] [2019-11-23 22:19:19,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 22:19:19,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:19:19,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 22:19:19,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1258, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:19:19,494 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 37 states. [2019-11-23 22:19:21,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:19:21,010 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2019-11-23 22:19:21,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 22:19:21,011 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 97 [2019-11-23 22:19:21,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:19:21,012 INFO L225 Difference]: With dead ends: 105 [2019-11-23 22:19:21,012 INFO L226 Difference]: Without dead ends: 101 [2019-11-23 22:19:21,014 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=1546, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:19:21,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-23 22:19:21,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-11-23 22:19:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-23 22:19:21,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2019-11-23 22:19:21,021 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 97 [2019-11-23 22:19:21,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:19:21,022 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2019-11-23 22:19:21,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 22:19:21,022 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2019-11-23 22:19:21,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-23 22:19:21,023 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:19:21,023 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1, 1, 1] [2019-11-23 22:19:21,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:19:21,227 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:19:21,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:19:21,228 INFO L82 PathProgramCache]: Analyzing trace with hash -58364415, now seen corresponding path program 31 times [2019-11-23 22:19:21,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:19:21,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390646934] [2019-11-23 22:19:21,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:19:21,233 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:19:21,233 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726699733] [2019-11-23 22:19:21,233 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:19:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:19:21,327 WARN L253 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 209 conjunts are in the unsatisfiable core [2019-11-23 22:19:21,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:19:22,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 0 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:19:22,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390646934] [2019-11-23 22:19:22,497 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:19:22,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726699733] [2019-11-23 22:19:22,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:19:22,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-11-23 22:19:22,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811977328] [2019-11-23 22:19:22,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 22:19:22,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:19:22,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 22:19:22,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1402, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:19:22,499 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 39 states. [2019-11-23 22:19:25,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:19:25,775 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2019-11-23 22:19:25,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 22:19:25,775 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 100 [2019-11-23 22:19:25,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:19:25,776 INFO L225 Difference]: With dead ends: 109 [2019-11-23 22:19:25,777 INFO L226 Difference]: Without dead ends: 105 [2019-11-23 22:19:25,779 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=214, Invalid=4756, Unknown=0, NotChecked=0, Total=4970 [2019-11-23 22:19:25,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-23 22:19:25,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2019-11-23 22:19:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-23 22:19:25,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2019-11-23 22:19:25,787 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 100 [2019-11-23 22:19:25,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:19:25,787 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2019-11-23 22:19:25,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 22:19:25,787 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2019-11-23 22:19:25,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-23 22:19:25,788 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:19:25,788 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1, 1, 1] [2019-11-23 22:19:25,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:19:25,991 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:19:25,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:19:25,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1945293008, now seen corresponding path program 32 times [2019-11-23 22:19:25,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:19:25,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953958667] [2019-11-23 22:19:25,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:19:25,998 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:19:25,998 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964398771] [2019-11-23 22:19:25,998 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:19:26,086 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:19:26,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:19:26,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 144 conjunts are in the unsatisfiable core [2019-11-23 22:19:26,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:19:26,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 0 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:19:26,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953958667] [2019-11-23 22:19:26,874 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:19:26,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964398771] [2019-11-23 22:19:26,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:19:26,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-11-23 22:19:26,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218849634] [2019-11-23 22:19:26,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 22:19:26,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:19:26,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 22:19:26,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:19:26,876 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 38 states. [2019-11-23 22:19:28,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:19:28,531 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2019-11-23 22:19:28,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 22:19:28,531 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 103 [2019-11-23 22:19:28,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:19:28,533 INFO L225 Difference]: With dead ends: 112 [2019-11-23 22:19:28,533 INFO L226 Difference]: Without dead ends: 108 [2019-11-23 22:19:28,534 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=1474, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:19:28,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-23 22:19:28,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-11-23 22:19:28,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-23 22:19:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2019-11-23 22:19:28,542 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 103 [2019-11-23 22:19:28,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:19:28,542 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2019-11-23 22:19:28,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 22:19:28,542 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2019-11-23 22:19:28,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-23 22:19:28,543 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:19:28,543 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1, 1, 1] [2019-11-23 22:19:28,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:19:28,747 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:19:28,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:19:28,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1448101793, now seen corresponding path program 33 times [2019-11-23 22:19:28,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:19:28,748 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891948864] [2019-11-23 22:19:28,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:19:28,754 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:19:28,754 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [266766622] [2019-11-23 22:19:28,754 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:19:29,683 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2019-11-23 22:19:29,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:19:29,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 162 conjunts are in the unsatisfiable core [2019-11-23 22:19:29,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:19:30,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:30,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:19:30,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891948864] [2019-11-23 22:19:30,457 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:19:30,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266766622] [2019-11-23 22:19:30,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:19:30,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-11-23 22:19:30,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523978117] [2019-11-23 22:19:30,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 22:19:30,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:19:30,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 22:19:30,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:19:30,459 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 39 states. [2019-11-23 22:19:32,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:19:32,417 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2019-11-23 22:19:32,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 22:19:32,418 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 106 [2019-11-23 22:19:32,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:19:32,419 INFO L225 Difference]: With dead ends: 114 [2019-11-23 22:19:32,419 INFO L226 Difference]: Without dead ends: 110 [2019-11-23 22:19:32,420 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=111, Invalid=2051, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 22:19:32,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-23 22:19:32,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2019-11-23 22:19:32,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-11-23 22:19:32,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2019-11-23 22:19:32,429 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 106 [2019-11-23 22:19:32,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:19:32,429 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2019-11-23 22:19:32,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 22:19:32,429 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2019-11-23 22:19:32,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-23 22:19:32,429 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:19:32,429 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1, 1, 1] [2019-11-23 22:19:32,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:19:32,630 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:19:32,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:19:32,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1328147664, now seen corresponding path program 34 times [2019-11-23 22:19:32,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:19:32,632 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635105507] [2019-11-23 22:19:32,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:19:32,636 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:19:32,636 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691901086] [2019-11-23 22:19:32,636 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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