/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/ps6.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:18:28,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:18:28,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:18:28,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:18:28,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:18:28,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:18:28,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:18:28,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:18:28,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:18:28,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:18:28,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:18:28,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:18:28,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:18:28,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:18:28,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:18:28,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:18:28,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:18:28,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:18:28,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:18:28,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:18:28,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:18:28,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:18:28,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:18:28,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:18:28,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:18:28,778 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:18:28,792 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:18:28,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:18:28,793 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:18:28,793 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:18:28,794 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:18:28,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:18:28,794 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:18:28,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:18:28,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:18:28,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:18:28,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:18:28,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:18:28,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:18:28,795 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:18:28,796 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:18:28,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:18:28,796 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:18:28,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:18:28,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:18:28,797 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:18:28,797 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:18:28,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:18:28,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:18:28,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:18:28,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:18:28,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:18:28,798 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:18:28,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:18:28,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:18:28,799 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:18:29,065 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:18:29,078 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:18:29,081 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:18:29,083 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:18:29,083 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:18:29,084 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps6.c [2019-11-23 22:18:29,149 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa23c1b02/5fa27ecfb2d948a5a22353b6725e1c89/FLAG52b65659c [2019-11-23 22:18:29,628 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:18:29,629 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps6.c [2019-11-23 22:18:29,636 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa23c1b02/5fa27ecfb2d948a5a22353b6725e1c89/FLAG52b65659c [2019-11-23 22:18:29,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa23c1b02/5fa27ecfb2d948a5a22353b6725e1c89 [2019-11-23 22:18:30,005 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:18:30,007 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:18:30,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:18:30,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:18:30,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:18:30,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:18:29" (1/1) ... [2019-11-23 22:18:30,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ece1d84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:30, skipping insertion in model container [2019-11-23 22:18:30,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:18:29" (1/1) ... [2019-11-23 22:18:30,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:18:30,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:18:30,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:18:30,242 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:18:30,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:18:30,276 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:18:30,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:30 WrapperNode [2019-11-23 22:18:30,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:18:30,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:18:30,277 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:18:30,277 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:18:30,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:30" (1/1) ... [2019-11-23 22:18:30,291 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:30" (1/1) ... [2019-11-23 22:18:30,393 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:18:30,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:18:30,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:18:30,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:18:30,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:30" (1/1) ... [2019-11-23 22:18:30,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:30" (1/1) ... [2019-11-23 22:18:30,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:30" (1/1) ... [2019-11-23 22:18:30,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:30" (1/1) ... [2019-11-23 22:18:30,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:30" (1/1) ... [2019-11-23 22:18:30,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:30" (1/1) ... [2019-11-23 22:18:30,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:30" (1/1) ... [2019-11-23 22:18:30,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:18:30,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:18:30,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:18:30,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:18:30,430 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:18:30,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:18:30,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:18:30,662 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:18:30,663 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 22:18:30,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:18:30 BoogieIcfgContainer [2019-11-23 22:18:30,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:18:30,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:18:30,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:18:30,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:18:30,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:18:29" (1/3) ... [2019-11-23 22:18:30,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b7b9efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:18:30, skipping insertion in model container [2019-11-23 22:18:30,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:30" (2/3) ... [2019-11-23 22:18:30,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b7b9efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:18:30, skipping insertion in model container [2019-11-23 22:18:30,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:18:30" (3/3) ... [2019-11-23 22:18:30,690 INFO L109 eAbstractionObserver]: Analyzing ICFG ps6.c [2019-11-23 22:18:30,715 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:18:30,734 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-23 22:18:30,759 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-23 22:18:30,798 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:18:30,799 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:18:30,799 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:18:30,799 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:18:30,799 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:18:30,799 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:18:30,799 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:18:30,800 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:18:30,811 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-23 22:18:30,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-23 22:18:30,816 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:30,817 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-23 22:18:30,817 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:30,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:30,823 INFO L82 PathProgramCache]: Analyzing trace with hash 963340, now seen corresponding path program 1 times [2019-11-23 22:18:30,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:30,830 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809894814] [2019-11-23 22:18:30,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:30,901 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:30,902 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175959820] [2019-11-23 22:18:30,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:30,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:30,941 WARN L253 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:18:30,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:31,008 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 22:18:31,008 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809894814] [2019-11-23 22:18:31,008 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:31,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175959820] [2019-11-23 22:18:31,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:18:31,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:18:31,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055316874] [2019-11-23 22:18:31,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:18:31,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:31,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:18:31,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:18:31,031 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 4 states. [2019-11-23 22:18:31,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:31,130 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2019-11-23 22:18:31,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:18:31,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-23 22:18:31,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:31,141 INFO L225 Difference]: With dead ends: 47 [2019-11-23 22:18:31,141 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 22:18:31,145 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:18:31,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 22:18:31,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-11-23 22:18:31,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 22:18:31,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-11-23 22:18:31,181 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 4 [2019-11-23 22:18:31,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:31,182 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-11-23 22:18:31,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:18:31,182 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-11-23 22:18:31,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 22:18:31,183 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:31,183 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-11-23 22:18:31,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:31,387 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:31,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:31,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1360983589, now seen corresponding path program 1 times [2019-11-23 22:18:31,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:31,388 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018182763] [2019-11-23 22:18:31,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:31,393 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:31,394 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111756862] [2019-11-23 22:18:31,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:31,423 WARN L253 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:18:31,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:31,525 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 22:18:31,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018182763] [2019-11-23 22:18:31,528 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:31,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111756862] [2019-11-23 22:18:31,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:31,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 22:18:31,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386593475] [2019-11-23 22:18:31,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:18:31,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:31,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:18:31,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:18:31,533 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2019-11-23 22:18:31,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:31,630 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-11-23 22:18:31,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:18:31,631 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2019-11-23 22:18:31,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:31,633 INFO L225 Difference]: With dead ends: 31 [2019-11-23 22:18:31,633 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 22:18:31,635 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:18:31,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 22:18:31,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2019-11-23 22:18:31,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 22:18:31,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-11-23 22:18:31,648 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 7 [2019-11-23 22:18:31,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:31,649 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-11-23 22:18:31,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:18:31,650 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-11-23 22:18:31,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:18:31,651 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:31,651 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2019-11-23 22:18:31,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:31,852 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:31,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:31,852 INFO L82 PathProgramCache]: Analyzing trace with hash -565900116, now seen corresponding path program 2 times [2019-11-23 22:18:31,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:31,853 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123787625] [2019-11-23 22:18:31,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:31,857 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:31,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722142220] [2019-11-23 22:18:31,858 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:31,885 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:18:31,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:31,887 WARN L253 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 22:18:31,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:31,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123787625] [2019-11-23 22:18:31,980 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:31,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722142220] [2019-11-23 22:18:31,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:31,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:18:31,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235829325] [2019-11-23 22:18:31,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:18:31,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:31,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:18:31,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:18:31,982 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2019-11-23 22:18:32,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:32,386 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-11-23 22:18:32,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:18:32,386 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-11-23 22:18:32,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:32,387 INFO L225 Difference]: With dead ends: 40 [2019-11-23 22:18:32,387 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:18:32,388 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:18:32,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:18:32,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2019-11-23 22:18:32,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:18:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-11-23 22:18:32,395 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 10 [2019-11-23 22:18:32,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:32,395 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-11-23 22:18:32,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:18:32,396 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-11-23 22:18:32,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 22:18:32,396 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:32,396 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:32,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:32,608 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:32,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:32,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1591864100, now seen corresponding path program 1 times [2019-11-23 22:18:32,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:32,609 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624189569] [2019-11-23 22:18:32,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:32,613 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:32,614 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119867201] [2019-11-23 22:18:32,614 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:32,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:32,641 WARN L253 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 22:18:32,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:32,774 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:32,792 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 22:18:32,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624189569] [2019-11-23 22:18:32,792 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:32,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119867201] [2019-11-23 22:18:32,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:32,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 22:18:32,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158760709] [2019-11-23 22:18:32,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:18:32,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:32,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:18:32,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:18:32,795 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 9 states. [2019-11-23 22:18:32,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:32,930 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2019-11-23 22:18:32,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:18:32,931 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-11-23 22:18:32,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:32,932 INFO L225 Difference]: With dead ends: 31 [2019-11-23 22:18:32,932 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:18:32,933 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:18:32,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:18:32,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-23 22:18:32,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:18:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-11-23 22:18:32,938 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 12 [2019-11-23 22:18:32,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:32,938 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-11-23 22:18:32,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:18:32,939 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-11-23 22:18:32,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:18:32,939 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:32,939 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1] [2019-11-23 22:18:33,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:33,143 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:33,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:33,144 INFO L82 PathProgramCache]: Analyzing trace with hash -978793413, now seen corresponding path program 3 times [2019-11-23 22:18:33,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:33,145 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964237946] [2019-11-23 22:18:33,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:33,150 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:33,151 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303323220] [2019-11-23 22:18:33,151 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 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 22:18:33,182 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 22:18:33,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:33,183 WARN L253 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 22:18:33,184 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:33,232 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:33,942 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 22:18:38,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964237946] [2019-11-23 22:18:38,003 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:38,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303323220] [2019-11-23 22:18:38,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:38,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:18:38,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402439571] [2019-11-23 22:18:38,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:18:38,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:38,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:18:38,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:18:38,005 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 6 states. [2019-11-23 22:18:38,443 WARN L192 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2019-11-23 22:18:38,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:38,511 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2019-11-23 22:18:38,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:18:38,511 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-23 22:18:38,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:38,512 INFO L225 Difference]: With dead ends: 25 [2019-11-23 22:18:38,512 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 22:18:38,512 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:18:38,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 22:18:38,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2019-11-23 22:18:38,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 22:18:38,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-11-23 22:18:38,517 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2019-11-23 22:18:38,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:38,517 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-11-23 22:18:38,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:18:38,518 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-11-23 22:18:38,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:18:38,518 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:38,518 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:38,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:38,721 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:38,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:38,721 INFO L82 PathProgramCache]: Analyzing trace with hash -61603085, now seen corresponding path program 2 times [2019-11-23 22:18:38,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:38,722 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289200440] [2019-11-23 22:18:38,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:38,727 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:38,727 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317092830] [2019-11-23 22:18:38,728 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:38,790 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:18:38,791 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:38,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 22:18:38,793 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:40,847 WARN L860 $PredicateComparison]: unable to prove that (and (<= c_ULTIMATE.start_main_~c~0 2) (= c_ULTIMATE.start_main_~y~0 2) (< 1 c_ULTIMATE.start_main_~k~0) (or (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond) (and (= 0 (mod (+ (* (* (* (* (* (* c_ULTIMATE.start_main_~y~0 (- 2)) c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) (* (* (* (* (* c_ULTIMATE.start_main_~y~0 5) c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) 11) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) (* (* (* (* (* (* c_ULTIMATE.start_main_~y~0 6) c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) 11)) (- 12))) (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond)))) is different from true [2019-11-23 22:18:40,848 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:40,888 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2019-11-23 22:18:40,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289200440] [2019-11-23 22:18:40,905 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:40,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317092830] [2019-11-23 22:18:40,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:40,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:18:40,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476607769] [2019-11-23 22:18:40,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:18:40,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:40,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:18:40,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=32, Unknown=1, NotChecked=10, Total=56 [2019-11-23 22:18:40,908 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2019-11-23 22:18:41,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:41,012 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-11-23 22:18:41,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:18:41,013 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-11-23 22:18:41,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:41,014 INFO L225 Difference]: With dead ends: 25 [2019-11-23 22:18:41,015 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 22:18:41,015 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=23, Invalid=52, Unknown=1, NotChecked=14, Total=90 [2019-11-23 22:18:41,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 22:18:41,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-23 22:18:41,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 22:18:41,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-11-23 22:18:41,021 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 15 [2019-11-23 22:18:41,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:41,021 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-11-23 22:18:41,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:18:41,022 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-11-23 22:18:41,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 22:18:41,022 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:41,022 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:41,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:41,226 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:41,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:41,227 INFO L82 PathProgramCache]: Analyzing trace with hash 477406404, now seen corresponding path program 3 times [2019-11-23 22:18:41,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:41,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225104354] [2019-11-23 22:18:41,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:41,233 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:41,233 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858590200] [2019-11-23 22:18:41,234 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:41,301 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:18:41,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:41,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 22:18:41,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:41,419 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:41,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225104354] [2019-11-23 22:18:41,431 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:41,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858590200] [2019-11-23 22:18:41,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:41,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 22:18:41,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499264506] [2019-11-23 22:18:41,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:18:41,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:41,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:18:41,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:18:41,433 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2019-11-23 22:18:41,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:41,584 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-11-23 22:18:41,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:18:41,585 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-11-23 22:18:41,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:41,586 INFO L225 Difference]: With dead ends: 28 [2019-11-23 22:18:41,586 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 22:18:41,587 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:18:41,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 22:18:41,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-23 22:18:41,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 22:18:41,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-11-23 22:18:41,592 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 18 [2019-11-23 22:18:41,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:41,592 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-11-23 22:18:41,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:18:41,593 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-11-23 22:18:41,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 22:18:41,593 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:41,593 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:41,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:41,797 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:41,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:41,798 INFO L82 PathProgramCache]: Analyzing trace with hash -773626541, now seen corresponding path program 4 times [2019-11-23 22:18:41,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:41,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655318018] [2019-11-23 22:18:41,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:41,803 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:41,804 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076691351] [2019-11-23 22:18:41,804 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:41,837 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:18:41,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:41,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 22:18:41,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:41,979 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:41,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655318018] [2019-11-23 22:18:41,995 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:41,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076691351] [2019-11-23 22:18:41,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:41,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 22:18:41,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138792398] [2019-11-23 22:18:41,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:18:41,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:41,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:18:41,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:18:41,997 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 10 states. [2019-11-23 22:18:42,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:42,169 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-11-23 22:18:42,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:18:42,170 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-23 22:18:42,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:42,171 INFO L225 Difference]: With dead ends: 31 [2019-11-23 22:18:42,171 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:18:42,172 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:18:42,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:18:42,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-23 22:18:42,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:18:42,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-11-23 22:18:42,177 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 21 [2019-11-23 22:18:42,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:42,177 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-11-23 22:18:42,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:18:42,178 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-11-23 22:18:42,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 22:18:42,178 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:42,178 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:42,384 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:42,385 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:42,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:42,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1430103652, now seen corresponding path program 5 times [2019-11-23 22:18:42,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:42,385 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083649652] [2019-11-23 22:18:42,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:42,391 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:42,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158070329] [2019-11-23 22:18:42,393 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:42,454 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:18:42,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:42,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 22:18:42,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:42,581 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:42,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083649652] [2019-11-23 22:18:42,599 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:42,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158070329] [2019-11-23 22:18:42,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:42,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 22:18:42,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600404747] [2019-11-23 22:18:42,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:18:42,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:42,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:18:42,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:18:42,602 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 11 states. [2019-11-23 22:18:42,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:42,809 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-11-23 22:18:42,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:18:42,814 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2019-11-23 22:18:42,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:42,815 INFO L225 Difference]: With dead ends: 34 [2019-11-23 22:18:42,815 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 22:18:42,816 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:18:42,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 22:18:42,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-23 22:18:42,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 22:18:42,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-11-23 22:18:42,822 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 24 [2019-11-23 22:18:42,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:42,822 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-11-23 22:18:42,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:18:42,822 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-11-23 22:18:42,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 22:18:42,823 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:42,823 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:43,026 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:43,027 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:43,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:43,028 INFO L82 PathProgramCache]: Analyzing trace with hash -113803341, now seen corresponding path program 6 times [2019-11-23 22:18:43,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:43,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346523731] [2019-11-23 22:18:43,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:43,033 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:43,033 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566957588] [2019-11-23 22:18:43,034 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:43,140 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 22:18:43,141 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:43,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-23 22:18:43,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:43,274 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:43,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346523731] [2019-11-23 22:18:43,287 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:43,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566957588] [2019-11-23 22:18:43,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:43,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-23 22:18:43,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291520996] [2019-11-23 22:18:43,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:18:43,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:43,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:18:43,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:18:43,288 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 13 states. [2019-11-23 22:18:43,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:43,515 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-11-23 22:18:43,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:18:43,516 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2019-11-23 22:18:43,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:43,517 INFO L225 Difference]: With dead ends: 37 [2019-11-23 22:18:43,517 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 22:18:43,517 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:18:43,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 22:18:43,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-23 22:18:43,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 22:18:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-11-23 22:18:43,524 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 27 [2019-11-23 22:18:43,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:43,524 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-11-23 22:18:43,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:18:43,524 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-11-23 22:18:43,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 22:18:43,525 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:43,525 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:43,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:43,729 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:43,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:43,730 INFO L82 PathProgramCache]: Analyzing trace with hash 157741060, now seen corresponding path program 7 times [2019-11-23 22:18:43,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:43,730 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739759335] [2019-11-23 22:18:43,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:43,734 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:43,734 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410221593] [2019-11-23 22:18:43,735 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:43,774 WARN L253 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 65 conjunts are in the unsatisfiable core [2019-11-23 22:18:43,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:45,934 WARN L860 $PredicateComparison]: unable to prove that (and (= 7 c_ULTIMATE.start_main_~y~0) (<= c_ULTIMATE.start_main_~c~0 7) (let ((.cse0 (= (+ (* (* (* (* (* c_ULTIMATE.start_main_~y~0 6) c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) (* (* (* (* c_ULTIMATE.start_main_~y~0 5) c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0)) (let ((.cse1 (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (+ .cse1 (* 12 (let ((.cse2 (+ c_ULTIMATE.start_main_~y~0 (- 1)))) (* (* (* (* .cse2 .cse2) .cse2) .cse2) .cse2))) (* 12 (* (* (* .cse1 c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0)) (* (* (* (* (* (* c_ULTIMATE.start_main_~y~0 (- 2)) c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0) 53100))))) (or (and (not .cse0) (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond)) (and .cse0 (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond)))) (< 6 c_ULTIMATE.start_main_~k~0)) is different from true [2019-11-23 22:18:45,936 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:47,364 WARN L192 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 43 DAG size of output: 9 [2019-11-23 22:18:47,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:47,429 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2019-11-23 22:18:47,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739759335] [2019-11-23 22:18:47,430 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:47,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410221593] [2019-11-23 22:18:47,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:47,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-23 22:18:47,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338828779] [2019-11-23 22:18:47,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:18:47,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:47,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:18:47,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=155, Unknown=1, NotChecked=24, Total=210 [2019-11-23 22:18:47,432 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 15 states. [2019-11-23 22:18:50,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:50,085 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-11-23 22:18:50,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:18:50,085 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2019-11-23 22:18:50,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:50,086 INFO L225 Difference]: With dead ends: 41 [2019-11-23 22:18:50,086 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 22:18:50,087 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=66, Invalid=399, Unknown=1, NotChecked=40, Total=506 [2019-11-23 22:18:50,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 22:18:50,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-11-23 22:18:50,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 22:18:50,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-11-23 22:18:50,094 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 30 [2019-11-23 22:18:50,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:50,095 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-11-23 22:18:50,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:18:50,095 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-11-23 22:18:50,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 22:18:50,096 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:50,096 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:50,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:50,300 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:50,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:50,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1981394413, now seen corresponding path program 8 times [2019-11-23 22:18:50,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:50,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790631392] [2019-11-23 22:18:50,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:50,306 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:50,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769528807] [2019-11-23 22:18:50,306 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:50,384 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:18:50,385 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:50,386 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 48 conjunts are in the unsatisfiable core [2019-11-23 22:18:50,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:50,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:50,573 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:50,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790631392] [2019-11-23 22:18:50,574 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:50,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769528807] [2019-11-23 22:18:50,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:50,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-23 22:18:50,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281038447] [2019-11-23 22:18:50,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:18:50,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:50,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:18:50,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:18:50,576 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 14 states. [2019-11-23 22:18:50,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:50,872 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-11-23 22:18:50,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:18:50,874 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2019-11-23 22:18:50,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:50,875 INFO L225 Difference]: With dead ends: 44 [2019-11-23 22:18:50,875 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 22:18:50,876 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:18:50,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 22:18:50,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-11-23 22:18:50,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 22:18:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-11-23 22:18:50,881 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 33 [2019-11-23 22:18:50,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:50,882 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-11-23 22:18:50,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:18:50,882 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-11-23 22:18:50,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 22:18:50,883 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:50,883 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:51,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:51,086 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:51,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:51,087 INFO L82 PathProgramCache]: Analyzing trace with hash -241532508, now seen corresponding path program 9 times [2019-11-23 22:18:51,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:51,088 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088025586] [2019-11-23 22:18:51,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:51,093 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:51,094 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851924334] [2019-11-23 22:18:51,094 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true