/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/prod4br.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:17:56,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:17:56,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:17:56,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:17:56,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:17:56,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:17:56,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:17:56,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:17:56,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:17:56,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:17:56,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:17:56,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:17:56,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:17:56,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:17:56,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:17:56,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:17:56,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:17:56,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:17:56,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:17:56,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:17:56,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:17:56,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:17:56,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:17:56,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:17:56,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:17:56,481 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 22:17:56,504 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:17:56,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:17:56,507 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:17:56,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:17:56,507 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:17:56,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:17:56,508 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:17:56,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:17:56,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:17:56,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:17:56,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:17:56,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:17:56,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:17:56,510 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:17:56,510 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:17:56,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:17:56,510 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:17:56,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:17:56,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:17:56,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:17:56,511 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:17:56,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:17:56,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:17:56,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:17:56,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:17:56,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:17:56,513 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:17:56,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:17:56,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:17:56,513 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:17:56,778 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:17:56,792 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:17:56,795 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:17:56,796 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:17:56,797 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:17:56,798 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/prod4br.c [2019-11-23 22:17:56,864 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/295698707/81d94a8cc76845d8a794b2f9c0cdd09b/FLAG801b36e4f [2019-11-23 22:17:57,299 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:17:57,300 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/prod4br.c [2019-11-23 22:17:57,306 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/295698707/81d94a8cc76845d8a794b2f9c0cdd09b/FLAG801b36e4f [2019-11-23 22:17:57,682 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/295698707/81d94a8cc76845d8a794b2f9c0cdd09b [2019-11-23 22:17:57,689 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:17:57,691 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:17:57,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:17:57,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:17:57,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:17:57,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:17:57" (1/1) ... [2019-11-23 22:17:57,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f18ca24 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 22:17:57,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:17:57" (1/1) ... [2019-11-23 22:17:57,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:17:57,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:17:57,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:17:57,930 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:17:57,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:17:57,961 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:17:57,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:57 WrapperNode [2019-11-23 22:17:57,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:17:57,962 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:17:57,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:17:57,962 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:17:57,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:57" (1/1) ... [2019-11-23 22:17:57,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:57" (1/1) ... [2019-11-23 22:17:58,069 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:17:58,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:17:58,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:17:58,070 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:17:58,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:57" (1/1) ... [2019-11-23 22:17:58,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:57" (1/1) ... [2019-11-23 22:17:58,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:57" (1/1) ... [2019-11-23 22:17:58,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:57" (1/1) ... [2019-11-23 22:17:58,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:57" (1/1) ... [2019-11-23 22:17:58,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:57" (1/1) ... [2019-11-23 22:17:58,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:57" (1/1) ... [2019-11-23 22:17:58,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:17:58,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:17:58,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:17:58,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:17:58,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:57" (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 22:17:58,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:17:58,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:17:58,377 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:17:58,377 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 22:17:58,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:17:58 BoogieIcfgContainer [2019-11-23 22:17:58,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:17:58,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:17:58,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:17:58,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:17:58,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:17:57" (1/3) ... [2019-11-23 22:17:58,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15daa36a 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 22:17:58,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:17:57" (2/3) ... [2019-11-23 22:17:58,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15daa36a 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 22:17:58,384 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 22:17:58,386 INFO L109 eAbstractionObserver]: Analyzing ICFG prod4br.c [2019-11-23 22:17:58,394 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:17:58,401 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-23 22:17:58,411 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-23 22:17:58,435 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:17:58,435 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:17:58,436 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:17:58,436 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:17:58,436 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:17:58,436 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:17:58,436 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:17:58,437 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:17:58,452 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-23 22:17:58,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-23 22:17:58,456 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:17:58,457 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-23 22:17:58,457 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:17:58,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:17:58,463 INFO L82 PathProgramCache]: Analyzing trace with hash 963340, now seen corresponding path program 1 times [2019-11-23 22:17:58,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:17:58,473 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209472934] [2019-11-23 22:17:58,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:17:58,544 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:17:58,545 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [578047187] [2019-11-23 22:17:58,545 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 22:17:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:17:58,584 WARN L253 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:17:58,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:17:58,699 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 22:17:58,700 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209472934] [2019-11-23 22:17:58,700 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:17:58,700 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578047187] [2019-11-23 22:17:58,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:17:58,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:17:58,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869556323] [2019-11-23 22:17:58,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:17:58,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:17:58,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:17:58,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:17:58,725 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 4 states. [2019-11-23 22:17:58,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:17:58,865 INFO L93 Difference]: Finished difference Result 60 states and 86 transitions. [2019-11-23 22:17:58,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:17:58,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-23 22:17:58,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:17:58,876 INFO L225 Difference]: With dead ends: 60 [2019-11-23 22:17:58,876 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 22:17:58,880 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 22:17:58,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 22:17:58,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 19. [2019-11-23 22:17:58,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 22:17:58,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-11-23 22:17:58,919 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2019-11-23 22:17:58,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:17:58,920 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-11-23 22:17:58,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:17:58,920 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-11-23 22:17:58,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 22:17:58,921 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:17:58,921 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:17:59,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:17:59,125 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:17:59,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:17:59,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1361008416, now seen corresponding path program 1 times [2019-11-23 22:17:59,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:17:59,128 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593325226] [2019-11-23 22:17:59,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:17:59,138 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:17:59,140 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734684598] [2019-11-23 22:17:59,140 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 22:17:59,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:17:59,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:17:59,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:17:59,283 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:17:59,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:17:59,362 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 22:17:59,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593325226] [2019-11-23 22:17:59,365 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:17:59,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734684598] [2019-11-23 22:17:59,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:17:59,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 22:17:59,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757934930] [2019-11-23 22:17:59,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:17:59,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:17:59,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:17:59,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:17:59,370 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 7 states. [2019-11-23 22:18:01,531 WARN L192 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2019-11-23 22:18:01,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:01,978 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2019-11-23 22:18:01,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:18:01,979 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2019-11-23 22:18:01,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:01,980 INFO L225 Difference]: With dead ends: 36 [2019-11-23 22:18:01,980 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 22:18:01,982 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:18:01,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 22:18:01,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2019-11-23 22:18:01,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 22:18:01,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-23 22:18:01,988 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 7 [2019-11-23 22:18:01,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:01,989 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-23 22:18:01,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:18:01,989 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-23 22:18:01,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:18:01,990 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:01,990 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:02,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:02,193 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:02,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:02,194 INFO L82 PathProgramCache]: Analyzing trace with hash 759715009, now seen corresponding path program 1 times [2019-11-23 22:18:02,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:02,194 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151302609] [2019-11-23 22:18:02,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:02,205 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:02,205 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415083116] [2019-11-23 22:18:02,205 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 22:18:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:02,231 WARN L253 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 22:18:02,232 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:02,282 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:02,409 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:02,424 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 22:18:02,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151302609] [2019-11-23 22:18:02,424 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:02,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415083116] [2019-11-23 22:18:02,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:02,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:18:02,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294926598] [2019-11-23 22:18:02,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:18:02,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:02,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:18:02,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:18:02,427 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 7 states. [2019-11-23 22:18:02,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:02,857 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2019-11-23 22:18:02,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:18:02,858 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2019-11-23 22:18:02,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:02,859 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:18:02,859 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 22:18:02,860 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:18:02,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 22:18:02,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2019-11-23 22:18:02,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 22:18:02,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2019-11-23 22:18:02,875 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 8 [2019-11-23 22:18:02,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:02,875 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2019-11-23 22:18:02,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:18:02,875 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2019-11-23 22:18:02,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:18:02,876 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:02,876 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:03,077 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:03,078 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:03,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:03,079 INFO L82 PathProgramCache]: Analyzing trace with hash 2036094115, now seen corresponding path program 1 times [2019-11-23 22:18:03,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:03,080 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653696052] [2019-11-23 22:18:03,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:03,087 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:03,087 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618223221] [2019-11-23 22:18:03,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-23 22:18:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:03,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:18:03,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:03,159 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 22:18:03,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653696052] [2019-11-23 22:18:03,160 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:03,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618223221] [2019-11-23 22:18:03,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:18:03,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:18:03,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584262679] [2019-11-23 22:18:03,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:18:03,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:03,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:18:03,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:18:03,163 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand 5 states. [2019-11-23 22:18:03,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:03,233 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2019-11-23 22:18:03,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:18:03,235 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-23 22:18:03,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:03,236 INFO L225 Difference]: With dead ends: 46 [2019-11-23 22:18:03,236 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 22:18:03,237 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:18:03,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 22:18:03,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2019-11-23 22:18:03,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 22:18:03,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2019-11-23 22:18:03,243 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 9 [2019-11-23 22:18:03,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:03,244 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2019-11-23 22:18:03,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:18:03,244 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2019-11-23 22:18:03,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:18:03,245 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:03,245 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:03,445 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:03,446 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:03,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:03,447 INFO L82 PathProgramCache]: Analyzing trace with hash 2078858104, now seen corresponding path program 1 times [2019-11-23 22:18:03,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:03,448 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760772674] [2019-11-23 22:18:03,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:03,454 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:03,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987470965] [2019-11-23 22:18:03,454 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 22:18:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:03,483 WARN L253 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 22:18:03,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:03,542 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:03,796 WARN L192 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2019-11-23 22:18:03,802 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:03,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760772674] [2019-11-23 22:18:03,839 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:03,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987470965] [2019-11-23 22:18:03,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:03,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:18:03,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924058320] [2019-11-23 22:18:03,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:18:03,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:03,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:18:03,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:18:03,842 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand 7 states. [2019-11-23 22:18:04,158 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2019-11-23 22:18:04,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:04,257 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2019-11-23 22:18:04,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:18:04,259 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-23 22:18:04,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:04,260 INFO L225 Difference]: With dead ends: 66 [2019-11-23 22:18:04,260 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 22:18:04,261 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:18:04,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 22:18:04,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2019-11-23 22:18:04,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 22:18:04,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2019-11-23 22:18:04,266 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 9 [2019-11-23 22:18:04,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:04,267 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2019-11-23 22:18:04,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:18:04,267 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2019-11-23 22:18:04,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:18:04,267 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:04,268 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:04,470 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:04,471 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:04,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:04,474 INFO L82 PathProgramCache]: Analyzing trace with hash 22770044, now seen corresponding path program 1 times [2019-11-23 22:18:04,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:04,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053658259] [2019-11-23 22:18:04,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:04,480 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:04,480 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386775827] [2019-11-23 22:18:04,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:18:04,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:04,516 WARN L253 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 22:18:04,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:04,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:04,622 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:04,636 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 22:18:04,637 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053658259] [2019-11-23 22:18:04,637 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:04,638 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386775827] [2019-11-23 22:18:04,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:04,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:18:04,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939886149] [2019-11-23 22:18:04,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:18:04,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:04,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:18:04,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:18:04,639 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 7 states. [2019-11-23 22:18:04,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:04,858 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2019-11-23 22:18:04,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:18:04,860 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-11-23 22:18:04,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:04,860 INFO L225 Difference]: With dead ends: 67 [2019-11-23 22:18:04,861 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 22:18:04,861 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:18:04,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 22:18:04,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2019-11-23 22:18:04,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 22:18:04,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2019-11-23 22:18:04,868 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 10 [2019-11-23 22:18:04,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:04,868 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2019-11-23 22:18:04,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:18:04,869 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2019-11-23 22:18:04,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:18:04,869 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:04,869 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:05,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:05,082 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:05,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:05,082 INFO L82 PathProgramCache]: Analyzing trace with hash 22829626, now seen corresponding path program 1 times [2019-11-23 22:18:05,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:05,083 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444322636] [2019-11-23 22:18:05,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:05,090 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:05,090 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76099689] [2019-11-23 22:18:05,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:05,123 WARN L253 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:18:05,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:05,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:05,249 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 22:18:05,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444322636] [2019-11-23 22:18:05,249 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:05,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76099689] [2019-11-23 22:18:05,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:05,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 22:18:05,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363070429] [2019-11-23 22:18:05,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:18:05,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:05,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:18:05,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:18:05,251 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand 6 states. [2019-11-23 22:18:05,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:05,479 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2019-11-23 22:18:05,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:18:05,489 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-23 22:18:05,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:05,490 INFO L225 Difference]: With dead ends: 73 [2019-11-23 22:18:05,490 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 22:18:05,491 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:18:05,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 22:18:05,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2019-11-23 22:18:05,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 22:18:05,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2019-11-23 22:18:05,498 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 10 [2019-11-23 22:18:05,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:05,498 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2019-11-23 22:18:05,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:18:05,498 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2019-11-23 22:18:05,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 22:18:05,499 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:05,499 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:05,702 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:05,705 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:05,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:05,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1802916085, now seen corresponding path program 1 times [2019-11-23 22:18:05,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:05,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850538930] [2019-11-23 22:18:05,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:05,711 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:05,711 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920172637] [2019-11-23 22:18:05,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:05,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:18:05,741 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:05,747 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:05,747 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:05,748 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:05,749 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:05,750 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:06,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:06,786 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:07,537 WARN L192 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 16 [2019-11-23 22:18:07,555 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 22:18:07,555 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850538930] [2019-11-23 22:18:07,555 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:07,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920172637] [2019-11-23 22:18:07,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:07,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:18:07,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333938837] [2019-11-23 22:18:07,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:18:07,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:07,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:18:07,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=39, Unknown=2, NotChecked=0, Total=56 [2019-11-23 22:18:07,558 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand 8 states. [2019-11-23 22:18:13,739 WARN L192 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-11-23 22:18:18,599 WARN L192 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2019-11-23 22:18:22,196 WARN L192 SmtUtils]: Spent 3.48 s on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2019-11-23 22:18:22,945 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2019-11-23 22:18:24,077 WARN L192 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2019-11-23 22:18:31,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:31,413 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2019-11-23 22:18:31,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:18:31,413 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-11-23 22:18:31,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:31,414 INFO L225 Difference]: With dead ends: 61 [2019-11-23 22:18:31,414 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 22:18:31,415 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=56, Invalid=121, Unknown=5, NotChecked=0, Total=182 [2019-11-23 22:18:31,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 22:18:31,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2019-11-23 22:18:31,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 22:18:31,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 70 transitions. [2019-11-23 22:18:31,423 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 70 transitions. Word has length 11 [2019-11-23 22:18:31,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:31,423 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 70 transitions. [2019-11-23 22:18:31,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:18:31,423 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 70 transitions. [2019-11-23 22:18:31,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 22:18:31,424 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:31,424 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2019-11-23 22:18:31,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:31,627 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:31,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:31,628 INFO L82 PathProgramCache]: Analyzing trace with hash -54520842, now seen corresponding path program 2 times [2019-11-23 22:18:31,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:31,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445102045] [2019-11-23 22:18:31,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:31,635 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:31,635 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718947346] [2019-11-23 22:18:31,635 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:31,666 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:18:31,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:31,667 WARN L253 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 22:18:31,668 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:31,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:31,679 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:31,839 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:31,870 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:31,871 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:31,871 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:31,872 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:31,873 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:31,874 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:31,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:31,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:32,133 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2019-11-23 22:18:32,136 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:32,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445102045] [2019-11-23 22:18:32,158 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:32,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718947346] [2019-11-23 22:18:32,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:32,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:18:32,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251873159] [2019-11-23 22:18:32,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:18:32,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:32,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:18:32,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=40, Unknown=1, NotChecked=0, Total=56 [2019-11-23 22:18:32,159 INFO L87 Difference]: Start difference. First operand 52 states and 70 transitions. Second operand 8 states. [2019-11-23 22:18:32,390 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2019-11-23 22:18:34,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:34,876 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2019-11-23 22:18:34,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:18:34,877 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-11-23 22:18:34,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:34,878 INFO L225 Difference]: With dead ends: 67 [2019-11-23 22:18:34,878 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 22:18:34,879 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=25, Invalid=64, Unknown=1, NotChecked=0, Total=90 [2019-11-23 22:18:34,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 22:18:34,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2019-11-23 22:18:34,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 22:18:34,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 75 transitions. [2019-11-23 22:18:34,888 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 75 transitions. Word has length 12 [2019-11-23 22:18:34,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:34,888 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 75 transitions. [2019-11-23 22:18:34,888 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:18:34,888 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 75 transitions. [2019-11-23 22:18:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:18:34,889 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:34,889 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:35,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:35,093 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:35,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:35,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1687616797, now seen corresponding path program 1 times [2019-11-23 22:18:35,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:35,094 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833915440] [2019-11-23 22:18:35,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:35,099 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:35,099 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715027938] [2019-11-23 22:18:35,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:18:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:35,131 WARN L253 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 22:18:35,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:35,275 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:36,035 WARN L192 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2019-11-23 22:18:36,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:36,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833915440] [2019-11-23 22:18:36,085 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:36,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715027938] [2019-11-23 22:18:36,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:36,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:18:36,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209336641] [2019-11-23 22:18:36,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:18:36,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:36,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:18:36,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:18:36,086 INFO L87 Difference]: Start difference. First operand 56 states and 75 transitions. Second operand 8 states. [2019-11-23 22:18:36,688 WARN L192 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2019-11-23 22:18:36,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:36,845 INFO L93 Difference]: Finished difference Result 92 states and 125 transitions. [2019-11-23 22:18:36,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:18:36,845 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-11-23 22:18:36,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:36,846 INFO L225 Difference]: With dead ends: 92 [2019-11-23 22:18:36,847 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 22:18:36,848 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:18:36,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 22:18:36,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2019-11-23 22:18:36,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-23 22:18:36,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2019-11-23 22:18:36,856 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 13 [2019-11-23 22:18:36,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:36,856 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2019-11-23 22:18:36,856 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:18:36,856 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2019-11-23 22:18:36,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:18:36,857 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:36,857 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:37,060 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:37,061 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:37,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:37,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1707108141, now seen corresponding path program 2 times [2019-11-23 22:18:37,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:37,062 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771913395] [2019-11-23 22:18:37,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:37,070 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:37,072 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713859107] [2019-11-23 22:18:37,072 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 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 22:18:37,106 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:18:37,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:37,107 WARN L253 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 22:18:37,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:37,122 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:37,123 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:37,336 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2019-11-23 22:18:37,337 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:37,390 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:37,390 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:37,391 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:37,391 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:37,393 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:37,393 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:37,395 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:37,395 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:37,510 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:37,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771913395] [2019-11-23 22:18:37,563 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:37,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713859107] [2019-11-23 22:18:37,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:37,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 22:18:37,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771548053] [2019-11-23 22:18:37,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:18:37,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:37,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:18:37,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=50, Unknown=1, NotChecked=0, Total=72 [2019-11-23 22:18:37,568 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand 9 states. [2019-11-23 22:18:37,832 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= c_ULTIMATE.start_main_~b~0 c_ULTIMATE.start_main_~y~0)) (.cse1 (= c_ULTIMATE.start_main_~p~0 1)) (.cse2 (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond)) (.cse3 (exists ((v_ULTIMATE.start_main_~a~0_26 Int)) (and (not (= 0 v_ULTIMATE.start_main_~a~0_26)) (<= v_ULTIMATE.start_main_~a~0_26 (+ c_ULTIMATE.start_main_~a~0 1)) (<= 0 v_ULTIMATE.start_main_~a~0_26) (= 1 (mod v_ULTIMATE.start_main_~a~0_26 2))))) (.cse5 (<= 1 c_ULTIMATE.start_main_~y~0)) (.cse6 (= 0 (mod c_ULTIMATE.start_main_~b~0 2))) (.cse4 (= (+ (* (* c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~b~0) c_ULTIMATE.start_main_~p~0) c_ULTIMATE.start_main_~q~0) (* c_ULTIMATE.start_main_~x~0 c_ULTIMATE.start_main_~y~0)))) (and .cse0 .cse1 .cse2 (or (and .cse0 .cse1 (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond) .cse3 (not .cse4) .cse5 .cse6) (and .cse0 .cse1 .cse2 .cse3 .cse5 .cse6 .cse4)) .cse3 .cse5 .cse6 .cse4 (not (= c_ULTIMATE.start_main_~a~0 0)))) is different from false [2019-11-23 22:18:38,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:38,622 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2019-11-23 22:18:38,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:18:38,623 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-11-23 22:18:38,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:38,624 INFO L225 Difference]: With dead ends: 72 [2019-11-23 22:18:38,624 INFO L226 Difference]: Without dead ends: 70 [2019-11-23 22:18:38,625 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=78, Unknown=2, NotChecked=18, Total=132 [2019-11-23 22:18:38,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-23 22:18:38,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2019-11-23 22:18:38,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 22:18:38,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2019-11-23 22:18:38,633 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 13 [2019-11-23 22:18:38,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:38,634 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2019-11-23 22:18:38,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:18:38,634 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2019-11-23 22:18:38,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:18:38,635 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:38,635 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:38,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:38,848 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:38,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:38,849 INFO L82 PathProgramCache]: Analyzing trace with hash -257551248, now seen corresponding path program 1 times [2019-11-23 22:18:38,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:38,849 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697725418] [2019-11-23 22:18:38,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:38,854 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:38,854 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647966523] [2019-11-23 22:18:38,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:18:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:38,874 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:18:38,877 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:38,932 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:38,950 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:38,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:38,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697725418] [2019-11-23 22:18:38,973 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:38,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647966523] [2019-11-23 22:18:38,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:18:38,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-23 22:18:38,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768123920] [2019-11-23 22:18:38,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:18:38,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:38,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:18:38,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:18:38,975 INFO L87 Difference]: Start difference. First operand 63 states and 83 transitions. Second operand 8 states. [2019-11-23 22:18:43,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:43,313 INFO L93 Difference]: Finished difference Result 94 states and 123 transitions. [2019-11-23 22:18:43,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:18:43,313 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-11-23 22:18:43,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:43,314 INFO L225 Difference]: With dead ends: 94 [2019-11-23 22:18:43,314 INFO L226 Difference]: Without dead ends: 90 [2019-11-23 22:18:43,314 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:18:43,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-23 22:18:43,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 71. [2019-11-23 22:18:43,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-23 22:18:43,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2019-11-23 22:18:43,323 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 13 [2019-11-23 22:18:43,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:43,323 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2019-11-23 22:18:43,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:18:43,324 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2019-11-23 22:18:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:18:43,324 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:43,325 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:43,528 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:43,529 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:43,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:43,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1517456114, now seen corresponding path program 1 times [2019-11-23 22:18:43,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:43,530 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940306959] [2019-11-23 22:18:43,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:43,534 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:43,535 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172316349] [2019-11-23 22:18:43,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:43,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:18:43,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:43,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:43,617 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:43,646 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 22:18:43,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940306959] [2019-11-23 22:18:43,646 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:43,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172316349] [2019-11-23 22:18:43,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:43,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:18:43,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781189838] [2019-11-23 22:18:43,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:18:43,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:43,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:18:43,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:18:43,648 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand 8 states. [2019-11-23 22:18:44,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:44,626 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2019-11-23 22:18:44,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:18:44,626 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-11-23 22:18:44,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:44,628 INFO L225 Difference]: With dead ends: 82 [2019-11-23 22:18:44,628 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 22:18:44,629 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:18:44,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 22:18:44,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 71. [2019-11-23 22:18:44,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-23 22:18:44,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2019-11-23 22:18:44,637 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 13 [2019-11-23 22:18:44,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:44,637 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2019-11-23 22:18:44,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:18:44,637 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2019-11-23 22:18:44,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:18:44,638 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:44,638 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:44,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:44,850 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:44,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:44,851 INFO L82 PathProgramCache]: Analyzing trace with hash -773834895, now seen corresponding path program 1 times [2019-11-23 22:18:44,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:44,852 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585833949] [2019-11-23 22:18:44,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:44,857 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:44,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114876141] [2019-11-23 22:18:44,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:44,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:44,903 WARN L253 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 22:18:44,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:45,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:45,100 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:45,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585833949] [2019-11-23 22:18:45,116 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:45,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114876141] [2019-11-23 22:18:45,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:45,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:18:45,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502873225] [2019-11-23 22:18:45,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:18:45,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:45,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:18:45,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:18:45,118 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand 8 states. [2019-11-23 22:18:45,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:45,644 INFO L93 Difference]: Finished difference Result 107 states and 140 transitions. [2019-11-23 22:18:45,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:18:45,645 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-11-23 22:18:45,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:45,646 INFO L225 Difference]: With dead ends: 107 [2019-11-23 22:18:45,646 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 22:18:45,647 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:18:45,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 22:18:45,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2019-11-23 22:18:45,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 22:18:45,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 96 transitions. [2019-11-23 22:18:45,654 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 96 transitions. Word has length 14 [2019-11-23 22:18:45,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:45,654 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 96 transitions. [2019-11-23 22:18:45,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:18:45,654 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 96 transitions. [2019-11-23 22:18:45,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:18:45,655 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:45,655 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:45,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:45,859 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:45,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:45,859 INFO L82 PathProgramCache]: Analyzing trace with hash -773775313, now seen corresponding path program 1 times [2019-11-23 22:18:45,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:45,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297707405] [2019-11-23 22:18:45,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:45,866 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:45,866 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842805358] [2019-11-23 22:18:45,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:18:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:45,893 WARN L253 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 22:18:45,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:46,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:46,319 WARN L192 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2019-11-23 22:18:46,538 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2019-11-23 22:18:46,541 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:46,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297707405] [2019-11-23 22:18:46,589 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:46,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842805358] [2019-11-23 22:18:46,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:46,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 22:18:46,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426536587] [2019-11-23 22:18:46,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:18:46,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:46,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:18:46,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:18:46,590 INFO L87 Difference]: Start difference. First operand 72 states and 96 transitions. Second operand 9 states. [2019-11-23 22:18:46,946 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-11-23 22:18:47,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:47,286 INFO L93 Difference]: Finished difference Result 110 states and 143 transitions. [2019-11-23 22:18:47,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:18:47,286 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-11-23 22:18:47,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:47,288 INFO L225 Difference]: With dead ends: 110 [2019-11-23 22:18:47,288 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 22:18:47,289 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:18:47,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 22:18:47,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2019-11-23 22:18:47,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-23 22:18:47,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 100 transitions. [2019-11-23 22:18:47,296 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 100 transitions. Word has length 14 [2019-11-23 22:18:47,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:47,296 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 100 transitions. [2019-11-23 22:18:47,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:18:47,296 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 100 transitions. [2019-11-23 22:18:47,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:18:47,297 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:47,297 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:47,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:47,505 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:47,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:47,505 INFO L82 PathProgramCache]: Analyzing trace with hash 607148849, now seen corresponding path program 2 times [2019-11-23 22:18:47,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:47,506 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944272119] [2019-11-23 22:18:47,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:47,509 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:47,510 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593174159] [2019-11-23 22:18:47,510 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 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 22:18:47,537 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:18:47,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:47,538 WARN L253 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 22:18:47,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:47,673 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:47,726 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:47,726 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:47,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:47,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:47,728 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:47,728 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:47,729 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:47,730 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:47,843 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:47,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944272119] [2019-11-23 22:18:47,856 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:47,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593174159] [2019-11-23 22:18:47,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:47,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:18:47,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704152869] [2019-11-23 22:18:47,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:18:47,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:47,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:18:47,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:18:47,858 INFO L87 Difference]: Start difference. First operand 75 states and 100 transitions. Second operand 8 states. [2019-11-23 22:18:50,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:50,450 INFO L93 Difference]: Finished difference Result 117 states and 154 transitions. [2019-11-23 22:18:50,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:18:50,451 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-11-23 22:18:50,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:50,452 INFO L225 Difference]: With dead ends: 117 [2019-11-23 22:18:50,452 INFO L226 Difference]: Without dead ends: 96 [2019-11-23 22:18:50,453 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:18:50,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-23 22:18:50,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2019-11-23 22:18:50,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-23 22:18:50,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 109 transitions. [2019-11-23 22:18:50,461 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 109 transitions. Word has length 14 [2019-11-23 22:18:50,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:50,461 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 109 transitions. [2019-11-23 22:18:50,462 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:18:50,462 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 109 transitions. [2019-11-23 22:18:50,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:18:50,462 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:50,463 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:50,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:50,666 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:50,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:50,666 INFO L82 PathProgramCache]: Analyzing trace with hash -202197777, now seen corresponding path program 2 times [2019-11-23 22:18:50,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:50,667 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527267185] [2019-11-23 22:18:50,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:50,670 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:50,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194156005] [2019-11-23 22:18:50,670 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 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 22:18:50,698 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:18:50,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:50,699 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 22:18:50,700 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:50,738 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,753 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,753 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,754 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,754 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,755 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,755 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,756 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,756 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,757 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,757 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,757 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,758 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,758 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,759 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,759 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,759 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,760 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,760 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,761 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,761 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,762 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,763 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,763 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,764 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,765 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,765 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,767 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,768 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,769 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,771 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,772 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,772 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,773 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,774 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,774 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,775 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,775 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,776 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,777 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,777 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,778 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,779 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,780 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:53,383 WARN L192 SmtUtils]: Spent 2.57 s on a formula simplification. DAG size of input: 68 DAG size of output: 32 [2019-11-23 22:18:53,386 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:53,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527267185] [2019-11-23 22:18:53,397 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:53,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194156005] [2019-11-23 22:18:53,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:53,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:18:53,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725255814] [2019-11-23 22:18:53,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:18:53,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:53,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:18:53,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:18:53,398 INFO L87 Difference]: Start difference. First operand 82 states and 109 transitions. Second operand 8 states. [2019-11-23 22:18:57,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:57,426 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2019-11-23 22:18:57,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:18:57,427 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-11-23 22:18:57,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:57,428 INFO L225 Difference]: With dead ends: 108 [2019-11-23 22:18:57,428 INFO L226 Difference]: Without dead ends: 106 [2019-11-23 22:18:57,428 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:18:57,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-23 22:18:57,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2019-11-23 22:18:57,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-23 22:18:57,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2019-11-23 22:18:57,438 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 14 [2019-11-23 22:18:57,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:57,438 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2019-11-23 22:18:57,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:18:57,439 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2019-11-23 22:18:57,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:18:57,439 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:57,439 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:57,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:57,643 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:57,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:57,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1601510451, now seen corresponding path program 1 times [2019-11-23 22:18:57,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:57,644 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887061815] [2019-11-23 22:18:57,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:57,649 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:57,649 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386153915] [2019-11-23 22:18:57,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:18:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:57,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:18:57,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:57,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887061815] [2019-11-23 22:18:57,712 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:57,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386153915] [2019-11-23 22:18:57,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:18:57,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 22:18:57,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800962202] [2019-11-23 22:18:57,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:18:57,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:57,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:18:57,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:18:57,714 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand 5 states. [2019-11-23 22:18:57,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:57,778 INFO L93 Difference]: Finished difference Result 92 states and 118 transitions. [2019-11-23 22:18:57,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:18:57,779 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-23 22:18:57,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:57,780 INFO L225 Difference]: With dead ends: 92 [2019-11-23 22:18:57,780 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 22:18:57,780 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:18:57,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 22:18:57,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2019-11-23 22:18:57,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-23 22:18:57,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2019-11-23 22:18:57,787 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 15 [2019-11-23 22:18:57,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:57,787 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2019-11-23 22:18:57,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:18:57,788 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2019-11-23 22:18:57,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:18:57,788 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:57,788 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:57,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:57,991 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:57,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:57,992 INFO L82 PathProgramCache]: Analyzing trace with hash -2013398475, now seen corresponding path program 1 times [2019-11-23 22:18:57,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:57,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541379540] [2019-11-23 22:18:57,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:57,997 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:57,998 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99815587] [2019-11-23 22:18:57,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:18:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:58,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:18:58,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:58,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,049 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 22:18:58,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541379540] [2019-11-23 22:18:58,050 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:58,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99815587] [2019-11-23 22:18:58,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:58,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 22:18:58,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745044876] [2019-11-23 22:18:58,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:18:58,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:58,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:18:58,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:18:58,055 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand 6 states. [2019-11-23 22:18:58,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:58,154 INFO L93 Difference]: Finished difference Result 97 states and 124 transitions. [2019-11-23 22:18:58,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:18:58,154 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-23 22:18:58,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:58,155 INFO L225 Difference]: With dead ends: 97 [2019-11-23 22:18:58,155 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 22:18:58,155 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:18:58,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 22:18:58,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2019-11-23 22:18:58,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 22:18:58,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2019-11-23 22:18:58,162 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 15 [2019-11-23 22:18:58,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:58,162 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2019-11-23 22:18:58,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:18:58,163 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2019-11-23 22:18:58,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:18:58,163 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:58,163 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1] [2019-11-23 22:18:58,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:58,364 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:58,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:58,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1087688533, now seen corresponding path program 3 times [2019-11-23 22:18:58,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:58,365 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513606929] [2019-11-23 22:18:58,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:58,369 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:58,369 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646993900] [2019-11-23 22:18:58,370 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 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 22:18:58,488 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 22:18:58,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:58,489 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 22:18:58,490 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:58,517 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,529 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,529 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,531 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,532 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,532 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,533 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,533 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,534 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,534 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,535 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,535 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,536 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,537 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,537 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,538 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,541 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,542 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,542 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,543 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,544 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,544 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,544 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:58,545 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:59,428 WARN L192 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2019-11-23 22:18:59,430 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 22:18:59,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513606929] [2019-11-23 22:18:59,535 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:59,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646993900] [2019-11-23 22:18:59,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:59,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:18:59,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838224732] [2019-11-23 22:18:59,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:18:59,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:59,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:18:59,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:18:59,536 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand 7 states. [2019-11-23 22:19:01,653 WARN L192 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-11-23 22:19:01,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:19:01,742 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2019-11-23 22:19:01,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:19:01,742 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-23 22:19:01,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:19:01,743 INFO L225 Difference]: With dead ends: 66 [2019-11-23 22:19:01,743 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 22:19:01,744 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:19:01,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 22:19:01,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2019-11-23 22:19:01,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 22:19:01,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2019-11-23 22:19:01,751 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 16 [2019-11-23 22:19:01,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:19:01,751 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2019-11-23 22:19:01,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:19:01,752 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2019-11-23 22:19:01,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:19:01,752 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:19:01,752 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:19:01,955 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:19:01,955 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:19:01,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:19:01,956 INFO L82 PathProgramCache]: Analyzing trace with hash -445971235, now seen corresponding path program 1 times [2019-11-23 22:19:01,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:19:01,956 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325792056] [2019-11-23 22:19:01,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:19:01,961 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:19:01,961 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667124272] [2019-11-23 22:19:01,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:19:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:19:01,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:19:01,988 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:19:01,995 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:01,995 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:02,137 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:04,192 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:19:04,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325792056] [2019-11-23 22:19:04,234 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:19:04,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667124272] [2019-11-23 22:19:04,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:19:04,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 22:19:04,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84325034] [2019-11-23 22:19:04,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:19:04,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:19:04,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:19:04,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=64, Unknown=1, NotChecked=0, Total=90 [2019-11-23 22:19:04,236 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand 10 states. [2019-11-23 22:19:10,512 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-11-23 22:19:12,600 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2019-11-23 22:19:16,564 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2019-11-23 22:19:17,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:19:17,706 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2019-11-23 22:19:17,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:19:17,706 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-11-23 22:19:17,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:19:17,707 INFO L225 Difference]: With dead ends: 77 [2019-11-23 22:19:17,708 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 22:19:17,708 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=135, Invalid=324, Unknown=3, NotChecked=0, Total=462 [2019-11-23 22:19:17,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 22:19:17,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2019-11-23 22:19:17,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-23 22:19:17,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2019-11-23 22:19:17,717 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 17 [2019-11-23 22:19:17,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:19:17,718 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2019-11-23 22:19:17,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:19:17,718 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2019-11-23 22:19:17,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 22:19:17,718 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:19:17,719 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:19:17,921 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:19:17,922 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:19:17,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:19:17,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1795518430, now seen corresponding path program 1 times [2019-11-23 22:19:17,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:19:17,922 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127823709] [2019-11-23 22:19:17,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:19:17,926 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:19:17,926 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [77054759] [2019-11-23 22:19:17,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:19:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:19:17,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:19:17,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:19:18,007 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:18,022 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:18,041 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:19:18,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127823709] [2019-11-23 22:19:18,041 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:19:18,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77054759] [2019-11-23 22:19:18,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:19:18,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-23 22:19:18,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701926122] [2019-11-23 22:19:18,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:19:18,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:19:18,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:19:18,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:19:18,043 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand 8 states. [2019-11-23 22:19:22,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:19:22,839 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2019-11-23 22:19:22,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:19:22,840 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-11-23 22:19:22,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:19:22,842 INFO L225 Difference]: With dead ends: 94 [2019-11-23 22:19:22,842 INFO L226 Difference]: Without dead ends: 90 [2019-11-23 22:19:22,843 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:19:22,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-23 22:19:22,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 62. [2019-11-23 22:19:22,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 22:19:22,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2019-11-23 22:19:22,851 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 20 [2019-11-23 22:19:22,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:19:22,851 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2019-11-23 22:19:22,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:19:22,851 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2019-11-23 22:19:22,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 22:19:22,852 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:19:22,852 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:19:23,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:19:23,055 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:19:23,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:19:23,056 INFO L82 PathProgramCache]: Analyzing trace with hash -361852600, now seen corresponding path program 2 times [2019-11-23 22:19:23,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:19:23,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028363884] [2019-11-23 22:19:23,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:19:23,061 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:19:23,061 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149514053] [2019-11-23 22:19:23,062 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 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 22:19:23,084 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 22:19:23,084 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:19:23,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:19:23,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:19:23,115 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:23,132 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 22:19:23,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028363884] [2019-11-23 22:19:23,155 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:19:23,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149514053] [2019-11-23 22:19:23,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:19:23,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 22:19:23,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714291412] [2019-11-23 22:19:23,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:19:23,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:19:23,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:19:23,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:19:23,157 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand 7 states. [2019-11-23 22:19:27,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:19:27,566 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2019-11-23 22:19:27,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:19:27,566 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-11-23 22:19:27,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:19:27,567 INFO L225 Difference]: With dead ends: 77 [2019-11-23 22:19:27,567 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 22:19:27,568 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:19:27,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 22:19:27,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2019-11-23 22:19:27,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 22:19:27,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2019-11-23 22:19:27,577 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 21 [2019-11-23 22:19:27,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:19:27,577 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2019-11-23 22:19:27,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:19:27,577 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2019-11-23 22:19:27,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 22:19:27,578 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:19:27,578 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:19:27,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:19:27,781 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:19:27,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:19:27,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1125066797, now seen corresponding path program 1 times [2019-11-23 22:19:27,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:19:27,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944731730] [2019-11-23 22:19:27,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:19:27,794 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:19:27,795 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993349736] [2019-11-23 22:19:27,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:19:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:19:27,821 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:19:27,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:19:27,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:27,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:19:27,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944731730] [2019-11-23 22:19:27,913 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:19:27,914 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993349736] [2019-11-23 22:19:27,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:19:27,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 22:19:27,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563623003] [2019-11-23 22:19:27,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:19:27,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:19:27,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:19:27,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:19:27,915 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 6 states. [2019-11-23 22:19:28,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:19:28,000 INFO L93 Difference]: Finished difference Result 103 states and 134 transitions. [2019-11-23 22:19:28,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:19:28,000 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-11-23 22:19:28,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:19:28,001 INFO L225 Difference]: With dead ends: 103 [2019-11-23 22:19:28,001 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 22:19:28,002 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:19:28,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 22:19:28,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2019-11-23 22:19:28,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 22:19:28,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2019-11-23 22:19:28,011 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 23 [2019-11-23 22:19:28,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:19:28,012 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2019-11-23 22:19:28,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:19:28,012 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2019-11-23 22:19:28,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 22:19:28,012 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:19:28,012 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:19:28,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:19:28,216 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:19:28,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:19:28,217 INFO L82 PathProgramCache]: Analyzing trace with hash -867484563, now seen corresponding path program 2 times [2019-11-23 22:19:28,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:19:28,217 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478251543] [2019-11-23 22:19:28,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:19:28,221 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:19:28,221 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [838729615] [2019-11-23 22:19:28,221 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 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 22:19:28,238 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 22:19:28,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:19:28,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:19:28,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:19:28,263 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:28,285 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-23 22:19:28,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478251543] [2019-11-23 22:19:28,301 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:19:28,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838729615] [2019-11-23 22:19:28,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:19:28,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 22:19:28,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495255374] [2019-11-23 22:19:28,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:19:28,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:19:28,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:19:28,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:19:28,303 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand 7 states. [2019-11-23 22:19:28,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:19:28,711 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2019-11-23 22:19:28,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:19:28,711 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2019-11-23 22:19:28,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:19:28,712 INFO L225 Difference]: With dead ends: 80 [2019-11-23 22:19:28,712 INFO L226 Difference]: Without dead ends: 76 [2019-11-23 22:19:28,713 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:19:28,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-23 22:19:28,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2019-11-23 22:19:28,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 22:19:28,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2019-11-23 22:19:28,724 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 23 [2019-11-23 22:19:28,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:19:28,724 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2019-11-23 22:19:28,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:19:28,724 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2019-11-23 22:19:28,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 22:19:28,725 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:19:28,725 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:19:28,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:19:28,929 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:19:28,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:19:28,929 INFO L82 PathProgramCache]: Analyzing trace with hash 785214054, now seen corresponding path program 1 times [2019-11-23 22:19:28,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:19:28,930 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020794096] [2019-11-23 22:19:28,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:19:28,935 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:19:28,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16009716] [2019-11-23 22:19:28,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:19:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:19:28,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:19:28,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:19:28,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:28,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:29,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:29,039 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:33,154 WARN L192 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 33 DAG size of output: 20 [2019-11-23 22:19:35,021 WARN L192 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2019-11-23 22:19:35,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:37,294 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:19:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 31 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:19:37,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020794096] [2019-11-23 22:19:37,353 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:19:37,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16009716] [2019-11-23 22:19:37,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:19:37,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 22:19:37,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223284791] [2019-11-23 22:19:37,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:19:37,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:19:37,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:19:37,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=93, Unknown=2, NotChecked=0, Total=132 [2019-11-23 22:19:37,355 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 12 states. [2019-11-23 22:19:37,596 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2019-11-23 22:19:40,505 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2019-11-23 22:19:40,797 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2019-11-23 22:19:41,747 WARN L192 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2019-11-23 22:19:46,046 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36