/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/prodbin.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:17:56,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:17:56,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:17:56,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:17:56,461 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:17:56,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:17:56,464 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:17:56,466 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:17:56,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:17:56,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:17:56,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:17:56,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:17:56,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:17:56,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:17:56,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:17:56,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:17:56,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:17:56,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:17:56,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:17:56,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:17:56,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:17:56,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:17:56,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:17:56,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:17:56,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:17:56,497 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 22:17:56,516 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:17:56,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:17:56,518 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:17:56,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:17:56,519 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:17:56,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:17:56,519 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:17:56,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:17:56,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:17:56,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:17:56,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:17:56,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:17:56,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:17:56,522 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:17:56,522 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:17:56,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:17:56,522 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:17:56,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:17:56,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:17:56,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:17:56,523 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:17:56,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:17:56,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:17:56,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:17:56,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:17:56,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:17:56,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:17:56,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:17:56,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:17:56,525 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:17:56,810 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:17:56,824 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:17:56,828 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:17:56,829 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:17:56,829 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:17:56,830 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/prodbin.c [2019-11-23 22:17:56,906 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a69530e5/fb1090e2a0cb4ec58b980921d5e89cba/FLAGe12edfa4d [2019-11-23 22:17:57,356 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:17:57,357 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/prodbin.c [2019-11-23 22:17:57,364 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a69530e5/fb1090e2a0cb4ec58b980921d5e89cba/FLAGe12edfa4d [2019-11-23 22:17:57,789 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a69530e5/fb1090e2a0cb4ec58b980921d5e89cba [2019-11-23 22:17:57,801 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:17:57,803 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:17:57,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:17:57,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:17:57,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:17:57,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:17:57" (1/1) ... [2019-11-23 22:17:57,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@544fd863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:57, skipping insertion in model container [2019-11-23 22:17:57,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:17:57" (1/1) ... [2019-11-23 22:17:57,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:17:57,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:17:58,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:17:58,076 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:17:58,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:17:58,107 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:17:58,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:58 WrapperNode [2019-11-23 22:17:58,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:17:58,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:17:58,108 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:17:58,109 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:17:58,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:58" (1/1) ... [2019-11-23 22:17:58,120 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:58" (1/1) ... [2019-11-23 22:17:58,225 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:17:58,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:17:58,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:17:58,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:17:58,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:58" (1/1) ... [2019-11-23 22:17:58,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:58" (1/1) ... [2019-11-23 22:17:58,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:58" (1/1) ... [2019-11-23 22:17:58,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:58" (1/1) ... [2019-11-23 22:17:58,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:58" (1/1) ... [2019-11-23 22:17:58,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:58" (1/1) ... [2019-11-23 22:17:58,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:58" (1/1) ... [2019-11-23 22:17:58,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:17:58,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:17:58,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:17:58,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:17:58,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:58" (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 22:17:58,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:17:58,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:17:58,483 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:17:58,483 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 22:17:58,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:17:58 BoogieIcfgContainer [2019-11-23 22:17:58,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:17:58,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:17:58,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:17:58,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:17:58,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:17:57" (1/3) ... [2019-11-23 22:17:58,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca7c3a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:17:58, skipping insertion in model container [2019-11-23 22:17:58,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:58" (2/3) ... [2019-11-23 22:17:58,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca7c3a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:17:58, skipping insertion in model container [2019-11-23 22:17:58,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:17:58" (3/3) ... [2019-11-23 22:17:58,492 INFO L109 eAbstractionObserver]: Analyzing ICFG prodbin.c [2019-11-23 22:17:58,500 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:17:58,506 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-23 22:17:58,517 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-23 22:17:58,541 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:17:58,541 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:17:58,541 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:17:58,542 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:17:58,542 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:17:58,542 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:17:58,542 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:17:58,542 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:17:58,555 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-23 22:17:58,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-23 22:17:58,560 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:17:58,561 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-23 22:17:58,561 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:17:58,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:17:58,568 INFO L82 PathProgramCache]: Analyzing trace with hash 963340, now seen corresponding path program 1 times [2019-11-23 22:17:58,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:17:58,576 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543930931] [2019-11-23 22:17:58,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:17:58,643 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:17:58,643 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909968526] [2019-11-23 22:17:58,644 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 22:17:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:17:58,695 WARN L253 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:17:58,700 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:17:58,811 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 22:17:58,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543930931] [2019-11-23 22:17:58,812 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:17:58,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909968526] [2019-11-23 22:17:58,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:17:58,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:17:58,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627038007] [2019-11-23 22:17:58,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:17:58,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:17:58,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:17:58,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:17:58,835 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2019-11-23 22:17:58,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:17:58,971 INFO L93 Difference]: Finished difference Result 38 states and 55 transitions. [2019-11-23 22:17:58,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:17:58,975 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-23 22:17:58,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:17:58,985 INFO L225 Difference]: With dead ends: 38 [2019-11-23 22:17:58,985 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 22:17:58,989 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:17:59,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 22:17:59,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2019-11-23 22:17:59,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 22:17:59,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-11-23 22:17:59,022 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 4 [2019-11-23 22:17:59,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:17:59,023 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-11-23 22:17:59,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:17:59,023 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-11-23 22:17:59,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:17:59,024 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:17:59,024 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:17:59,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:17:59,226 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:17:59,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:17:59,227 INFO L82 PathProgramCache]: Analyzing trace with hash 2076981271, now seen corresponding path program 1 times [2019-11-23 22:17:59,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:17:59,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467914391] [2019-11-23 22:17:59,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:17:59,234 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:17:59,234 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128187410] [2019-11-23 22:17:59,234 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 22:17:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:17:59,265 WARN L253 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:17:59,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:17:59,332 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:17:59,428 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:17:59,430 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:05,309 WARN L192 SmtUtils]: Spent 5.82 s on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2019-11-23 22:18:05,314 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:05,350 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 22:18:05,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467914391] [2019-11-23 22:18:05,351 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:05,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128187410] [2019-11-23 22:18:05,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:05,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:18:05,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376166924] [2019-11-23 22:18:05,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:18:05,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:05,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:18:05,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:18:05,355 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2019-11-23 22:18:05,928 WARN L192 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2019-11-23 22:18:09,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:09,618 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2019-11-23 22:18:09,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:18:09,618 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2019-11-23 22:18:09,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:09,620 INFO L225 Difference]: With dead ends: 31 [2019-11-23 22:18:09,620 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:18:09,621 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=38, Invalid=92, Unknown=2, NotChecked=0, Total=132 [2019-11-23 22:18:09,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:18:09,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2019-11-23 22:18:09,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 22:18:09,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-23 22:18:09,627 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 9 [2019-11-23 22:18:09,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:09,628 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-23 22:18:09,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:18:09,628 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-23 22:18:09,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 22:18:09,629 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:09,629 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:09,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:09,832 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:09,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:09,832 INFO L82 PathProgramCache]: Analyzing trace with hash 2055069964, now seen corresponding path program 1 times [2019-11-23 22:18:09,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:09,833 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300895789] [2019-11-23 22:18:09,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:09,838 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:09,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305551427] [2019-11-23 22:18:09,839 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 22:18:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:09,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:18:09,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:09,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:18:09,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300895789] [2019-11-23 22:18:09,975 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:09,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305551427] [2019-11-23 22:18:09,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:18:09,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 22:18:09,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085600389] [2019-11-23 22:18:09,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:18:09,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:09,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:18:09,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:18:09,978 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2019-11-23 22:18:10,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:10,230 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-11-23 22:18:10,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:18:10,233 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-11-23 22:18:10,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:10,234 INFO L225 Difference]: With dead ends: 21 [2019-11-23 22:18:10,234 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 22:18:10,235 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:18:10,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 22:18:10,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2019-11-23 22:18:10,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 22:18:10,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-23 22:18:10,239 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2019-11-23 22:18:10,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:10,240 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-23 22:18:10,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:18:10,240 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-23 22:18:10,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:18:10,241 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:10,241 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2019-11-23 22:18:10,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:10,444 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:10,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:10,445 INFO L82 PathProgramCache]: Analyzing trace with hash -713088532, now seen corresponding path program 2 times [2019-11-23 22:18:10,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:10,446 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310126419] [2019-11-23 22:18:10,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:10,451 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:10,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609810290] [2019-11-23 22:18:10,452 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:10,491 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:18:10,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:10,493 WARN L253 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 22:18:10,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:10,790 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:10,813 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 22:18:10,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310126419] [2019-11-23 22:18:10,813 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:10,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609810290] [2019-11-23 22:18:10,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:10,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 22:18:10,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466637865] [2019-11-23 22:18:10,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:18:10,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:10,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:18:10,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:18:10,816 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 9 states. [2019-11-23 22:18:13,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:13,342 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2019-11-23 22:18:13,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:18:13,342 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-11-23 22:18:13,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:13,343 INFO L225 Difference]: With dead ends: 31 [2019-11-23 22:18:13,344 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:18:13,345 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:18:13,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:18:13,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2019-11-23 22:18:13,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 22:18:13,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-23 22:18:13,354 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2019-11-23 22:18:13,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:13,355 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-23 22:18:13,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:18:13,355 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-23 22:18:13,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:18:13,356 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:13,356 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2019-11-23 22:18:13,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:13,566 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:13,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:13,567 INFO L82 PathProgramCache]: Analyzing trace with hash -711241490, now seen corresponding path program 1 times [2019-11-23 22:18:13,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:13,568 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601180926] [2019-11-23 22:18:13,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:13,573 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:13,574 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795669274] [2019-11-23 22:18:13,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:13,599 WARN L253 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 22:18:13,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:13,637 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:13,726 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:13,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:13,903 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2019-11-23 22:18:16,059 WARN L192 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2019-11-23 22:18:16,062 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:16,063 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:16,194 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:16,221 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 22:18:16,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601180926] [2019-11-23 22:18:16,222 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:16,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795669274] [2019-11-23 22:18:16,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:16,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 22:18:16,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521506617] [2019-11-23 22:18:16,223 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:18:16,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:16,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:18:16,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=69, Unknown=1, NotChecked=0, Total=90 [2019-11-23 22:18:16,224 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 10 states. [2019-11-23 22:18:17,005 WARN L192 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2019-11-23 22:18:21,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:21,549 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-11-23 22:18:21,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:18:21,550 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-11-23 22:18:21,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:21,551 INFO L225 Difference]: With dead ends: 35 [2019-11-23 22:18:21,551 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 22:18:21,552 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=53, Invalid=180, Unknown=7, NotChecked=0, Total=240 [2019-11-23 22:18:21,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 22:18:21,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2019-11-23 22:18:21,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:18:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-23 22:18:21,559 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 14 [2019-11-23 22:18:21,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:21,560 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-23 22:18:21,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:18:21,560 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-23 22:18:21,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:18:21,561 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:21,561 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2019-11-23 22:18:21,764 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:21,764 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:21,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:21,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1106115542, now seen corresponding path program 2 times [2019-11-23 22:18:21,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:21,765 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812409603] [2019-11-23 22:18:21,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:21,771 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:21,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1758803083] [2019-11-23 22:18:21,776 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:21,809 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:18:21,809 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:21,810 WARN L253 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 22:18:21,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:22,006 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:22,051 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 22:18:22,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812409603] [2019-11-23 22:18:22,052 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:22,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758803083] [2019-11-23 22:18:22,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:22,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:18:22,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986920001] [2019-11-23 22:18:22,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:18:22,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:22,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:18:22,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:18:22,055 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2019-11-23 22:18:22,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:22,463 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2019-11-23 22:18:22,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:18:22,463 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-11-23 22:18:22,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:22,464 INFO L225 Difference]: With dead ends: 37 [2019-11-23 22:18:22,464 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 22:18:22,464 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:18:22,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 22:18:22,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2019-11-23 22:18:22,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 22:18:22,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-23 22:18:22,471 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2019-11-23 22:18:22,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:22,471 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-23 22:18:22,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:18:22,471 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-23 22:18:22,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:18:22,472 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:22,472 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1] [2019-11-23 22:18:22,675 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:22,676 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:22,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:22,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1079110345, now seen corresponding path program 3 times [2019-11-23 22:18:22,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:22,677 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357040351] [2019-11-23 22:18:22,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:22,681 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:22,681 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151061453] [2019-11-23 22:18:22,682 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 22:18:22,710 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 22:18:22,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:22,712 WARN L253 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:18:22,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:22,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:23,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:23,016 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:25,380 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2019-11-23 22:18:25,382 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:25,442 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 22:18:25,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357040351] [2019-11-23 22:18:25,443 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:25,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151061453] [2019-11-23 22:18:25,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:25,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 22:18:25,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068225650] [2019-11-23 22:18:25,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:18:25,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:25,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:18:25,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=58, Unknown=2, NotChecked=0, Total=90 [2019-11-23 22:18:25,445 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 10 states. [2019-11-23 22:18:27,691 WARN L192 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2019-11-23 22:18:30,125 WARN L192 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2019-11-23 22:18:32,795 WARN L192 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2019-11-23 22:18:32,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:32,887 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2019-11-23 22:18:32,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:18:32,888 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2019-11-23 22:18:32,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:32,889 INFO L225 Difference]: With dead ends: 34 [2019-11-23 22:18:32,889 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 22:18:32,889 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=102, Invalid=168, Unknown=2, NotChecked=0, Total=272 [2019-11-23 22:18:32,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 22:18:32,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-23 22:18:32,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 22:18:32,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-23 22:18:32,902 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 19 [2019-11-23 22:18:32,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:32,903 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-23 22:18:32,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:18:32,903 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-23 22:18:32,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:18:32,904 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:32,907 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1] [2019-11-23 22:18:33,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:33,111 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:33,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:33,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1470290313, now seen corresponding path program 3 times [2019-11-23 22:18:33,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:33,112 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635762675] [2019-11-23 22:18:33,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:33,117 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:33,117 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580524466] [2019-11-23 22:18:33,118 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 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 22:18:33,144 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:18:33,145 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:33,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 22:18:33,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:33,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:33,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:33,234 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:33,235 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:33,402 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:33,678 WARN L192 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2019-11-23 22:18:33,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:33,683 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:33,944 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:33,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635762675] [2019-11-23 22:18:33,981 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:33,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580524466] [2019-11-23 22:18:33,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:33,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 22:18:33,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550059783] [2019-11-23 22:18:33,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:18:33,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:33,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:18:33,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:18:33,983 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 12 states. [2019-11-23 22:18:34,464 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2019-11-23 22:18:36,760 WARN L192 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2019-11-23 22:18:43,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:43,197 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2019-11-23 22:18:43,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:18:43,198 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-11-23 22:18:43,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:43,199 INFO L225 Difference]: With dead ends: 32 [2019-11-23 22:18:43,199 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 22:18:43,199 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:18:43,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 22:18:43,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2019-11-23 22:18:43,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:18:43,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-11-23 22:18:43,205 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2019-11-23 22:18:43,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:43,205 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-11-23 22:18:43,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:18:43,205 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-11-23 22:18:43,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 22:18:43,206 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:43,206 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 1, 1, 1, 1] [2019-11-23 22:18:43,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:43,407 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:43,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:43,408 INFO L82 PathProgramCache]: Analyzing trace with hash -935305586, now seen corresponding path program 4 times [2019-11-23 22:18:43,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:43,409 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709639832] [2019-11-23 22:18:43,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:43,412 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:43,413 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800738078] [2019-11-23 22:18:43,413 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 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 22:18:43,438 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:18:43,438 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:43,439 WARN L253 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-23 22:18:43,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:43,476 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:43,542 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:43,543 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:44,348 WARN L192 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2019-11-23 22:18:44,350 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:44,351 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:48,863 WARN L192 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2019-11-23 22:18:51,810 WARN L192 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2019-11-23 22:18:51,812 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:51,813 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:52,774 WARN L192 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2019-11-23 22:18:53,720 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2019-11-23 22:18:53,723 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:53,724 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:03,283 WARN L192 SmtUtils]: Spent 8.64 s on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2019-11-23 22:19:03,285 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 20 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:19:03,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709639832] [2019-11-23 22:19:03,318 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:19:03,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800738078] [2019-11-23 22:19:03,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:19:03,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-23 22:19:03,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348313158] [2019-11-23 22:19:03,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:19:03,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:19:03,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:19:03,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=132, Unknown=44, NotChecked=0, Total=210 [2019-11-23 22:19:03,320 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 15 states. [2019-11-23 22:19:05,045 WARN L192 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2019-11-23 22:19:09,155 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-11-23 22:19:12,862 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-11-23 22:19:20,170 WARN L192 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 48 [2019-11-23 22:19:21,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:19:21,399 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2019-11-23 22:19:21,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:19:21,399 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2019-11-23 22:19:21,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:19:21,400 INFO L225 Difference]: With dead ends: 40 [2019-11-23 22:19:21,400 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 22:19:21,401 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=95, Invalid=424, Unknown=131, NotChecked=0, Total=650 [2019-11-23 22:19:21,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 22:19:21,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2019-11-23 22:19:21,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 22:19:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-11-23 22:19:21,411 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 24 [2019-11-23 22:19:21,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:19:21,411 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-11-23 22:19:21,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:19:21,411 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-11-23 22:19:21,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 22:19:21,412 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:19:21,412 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 1, 1, 1, 1] [2019-11-23 22:19:21,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:19:21,616 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:19:21,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:19:21,617 INFO L82 PathProgramCache]: Analyzing trace with hash -723542825, now seen corresponding path program 5 times [2019-11-23 22:19:21,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:19:21,617 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425627152] [2019-11-23 22:19:21,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:19:21,622 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:19:21,622 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300244540] [2019-11-23 22:19:21,622 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 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 22:19:21,654 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:19:21,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:19:21,656 WARN L253 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-23 22:19:21,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:19:21,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:21,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:21,782 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:22,517 WARN L192 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2019-11-23 22:19:22,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:22,519 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:23,130 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:23,130 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:25,236 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:25,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:28,126 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2019-11-23 22:19:28,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:28,129 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:30,196 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 26 refuted. 34 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:19:30,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425627152] [2019-11-23 22:19:30,262 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:19:30,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300244540] [2019-11-23 22:19:30,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:19:30,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-11-23 22:19:30,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749618227] [2019-11-23 22:19:30,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:19:30,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:19:30,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:19:30,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=172, Unknown=59, NotChecked=0, Total=272 [2019-11-23 22:19:30,264 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 17 states. [2019-11-23 22:19:31,275 WARN L192 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2019-11-23 22:19:33,385 WARN L192 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2019-11-23 22:19:34,441 WARN L192 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31