/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/ps5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:18:15,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:18:15,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:18:15,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:18:15,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:18:15,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:18:15,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:18:15,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:18:15,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:18:15,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:18:15,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:18:15,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:18:15,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:18:15,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:18:15,375 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:18:15,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:18:15,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:18:15,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:18:15,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:18:15,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:18:15,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:18:15,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:18:15,390 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:18:15,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:18:15,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:18:15,416 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 22:18:15,441 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:18:15,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:18:15,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:18:15,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:18:15,444 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:18:15,444 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:18:15,445 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:18:15,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:18:15,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:18:15,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:18:15,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:18:15,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:18:15,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:18:15,446 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:18:15,447 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:18:15,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:18:15,447 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:18:15,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:18:15,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:18:15,447 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:18:15,449 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:18:15,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:18:15,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:18:15,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:18:15,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:18:15,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:18:15,450 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:18:15,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:18:15,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:18:15,450 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:18:15,697 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:18:15,710 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:18:15,716 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:18:15,717 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:18:15,718 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:18:15,718 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps5.c [2019-11-23 22:18:15,790 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be948053a/a51df417ddb04ff3b2985f6786aa8133/FLAGa5ab0f13d [2019-11-23 22:18:16,238 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:18:16,238 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps5.c [2019-11-23 22:18:16,246 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be948053a/a51df417ddb04ff3b2985f6786aa8133/FLAGa5ab0f13d [2019-11-23 22:18:16,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be948053a/a51df417ddb04ff3b2985f6786aa8133 [2019-11-23 22:18:16,612 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:18:16,614 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:18:16,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:18:16,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:18:16,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:18:16,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:18:16" (1/1) ... [2019-11-23 22:18:16,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c0823c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:16, skipping insertion in model container [2019-11-23 22:18:16,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:18:16" (1/1) ... [2019-11-23 22:18:16,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:18:16,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:18:16,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:18:16,829 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:18:16,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:18:16,875 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:18:16,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:16 WrapperNode [2019-11-23 22:18:16,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:18:16,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:18:16,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:18:16,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:18:16,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:16" (1/1) ... [2019-11-23 22:18:16,891 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:16" (1/1) ... [2019-11-23 22:18:16,994 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:18:16,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:18:16,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:18:16,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:18:17,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:16" (1/1) ... [2019-11-23 22:18:17,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:16" (1/1) ... [2019-11-23 22:18:17,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:16" (1/1) ... [2019-11-23 22:18:17,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:16" (1/1) ... [2019-11-23 22:18:17,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:16" (1/1) ... [2019-11-23 22:18:17,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:16" (1/1) ... [2019-11-23 22:18:17,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:16" (1/1) ... [2019-11-23 22:18:17,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:18:17,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:18:17,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:18:17,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:18:17,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:16" (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 22:18:17,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:18:17,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:18:17,272 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:18:17,273 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 22:18:17,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:18:17 BoogieIcfgContainer [2019-11-23 22:18:17,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:18:17,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:18:17,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:18:17,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:18:17,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:18:16" (1/3) ... [2019-11-23 22:18:17,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3753ba32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:18:17, skipping insertion in model container [2019-11-23 22:18:17,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:18:16" (2/3) ... [2019-11-23 22:18:17,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3753ba32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:18:17, skipping insertion in model container [2019-11-23 22:18:17,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:18:17" (3/3) ... [2019-11-23 22:18:17,283 INFO L109 eAbstractionObserver]: Analyzing ICFG ps5.c [2019-11-23 22:18:17,298 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:18:17,328 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-23 22:18:17,353 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-23 22:18:17,394 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:18:17,395 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:18:17,395 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:18:17,395 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:18:17,395 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:18:17,395 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:18:17,395 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:18:17,396 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:18:17,410 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-23 22:18:17,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-23 22:18:17,415 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:17,416 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-23 22:18:17,416 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:17,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:17,422 INFO L82 PathProgramCache]: Analyzing trace with hash 963340, now seen corresponding path program 1 times [2019-11-23 22:18:17,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:17,429 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806315557] [2019-11-23 22:18:17,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:17,501 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:17,501 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691438099] [2019-11-23 22:18:17,502 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 22:18:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:17,535 WARN L253 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:18:17,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:17,596 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 22:18:17,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806315557] [2019-11-23 22:18:17,597 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:17,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691438099] [2019-11-23 22:18:17,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:18:17,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:18:17,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794426285] [2019-11-23 22:18:17,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:18:17,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:17,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:18:17,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:18:17,618 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 4 states. [2019-11-23 22:18:17,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:17,728 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2019-11-23 22:18:17,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:18:17,730 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-23 22:18:17,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:17,738 INFO L225 Difference]: With dead ends: 47 [2019-11-23 22:18:17,739 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 22:18:17,742 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 22:18:17,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 22:18:17,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-11-23 22:18:17,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 22:18:17,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-11-23 22:18:17,772 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 4 [2019-11-23 22:18:17,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:17,773 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-11-23 22:18:17,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:18:17,773 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-11-23 22:18:17,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 22:18:17,774 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:17,774 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-11-23 22:18:17,975 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:17,976 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:17,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:17,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1360983589, now seen corresponding path program 1 times [2019-11-23 22:18:17,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:17,978 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209320924] [2019-11-23 22:18:17,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:17,983 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:17,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404738638] [2019-11-23 22:18:17,984 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 22:18:18,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:18,023 WARN L253 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:18:18,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:18,128 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 22:18:18,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209320924] [2019-11-23 22:18:18,129 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:18,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404738638] [2019-11-23 22:18:18,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:18,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 22:18:18,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785919165] [2019-11-23 22:18:18,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:18:18,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:18,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:18:18,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:18:18,133 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2019-11-23 22:18:18,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:18,225 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-11-23 22:18:18,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:18:18,226 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2019-11-23 22:18:18,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:18,228 INFO L225 Difference]: With dead ends: 31 [2019-11-23 22:18:18,228 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 22:18:18,229 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:18:18,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 22:18:18,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2019-11-23 22:18:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 22:18:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-11-23 22:18:18,235 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 7 [2019-11-23 22:18:18,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:18,236 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-11-23 22:18:18,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:18:18,236 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-11-23 22:18:18,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:18:18,237 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:18,237 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2019-11-23 22:18:18,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:18,441 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:18,441 INFO L82 PathProgramCache]: Analyzing trace with hash -565900116, now seen corresponding path program 2 times [2019-11-23 22:18:18,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:18,442 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936037238] [2019-11-23 22:18:18,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:18,448 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:18,452 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116042454] [2019-11-23 22:18:18,452 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:18:18,493 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:18:18,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:18,494 WARN L253 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 22:18:18,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:18,583 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 22:18:18,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936037238] [2019-11-23 22:18:18,583 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:18,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116042454] [2019-11-23 22:18:18,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:18,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:18:18,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837234155] [2019-11-23 22:18:18,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:18:18,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:18,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:18:18,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:18:18,586 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2019-11-23 22:18:18,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:18,961 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-11-23 22:18:18,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:18:18,962 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-11-23 22:18:18,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:18,962 INFO L225 Difference]: With dead ends: 40 [2019-11-23 22:18:18,963 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:18:18,964 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 22:18:18,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:18:18,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2019-11-23 22:18:18,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:18:18,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-11-23 22:18:18,975 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 10 [2019-11-23 22:18:18,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:18,976 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-11-23 22:18:18,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:18:18,977 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-11-23 22:18:18,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 22:18:18,978 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:18,979 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:19,182 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:19,183 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:19,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:19,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1591864100, now seen corresponding path program 1 times [2019-11-23 22:18:19,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:19,185 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410887692] [2019-11-23 22:18:19,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:19,189 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:19,189 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [913360472] [2019-11-23 22:18:19,190 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 22:18:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:18:19,217 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 22:18:19,219 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:19,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:19,327 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 22:18:19,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410887692] [2019-11-23 22:18:19,327 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:19,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913360472] [2019-11-23 22:18:19,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:19,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:18:19,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434075490] [2019-11-23 22:18:19,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:18:19,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:19,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:18:19,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:18:19,330 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2019-11-23 22:18:19,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:19,455 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2019-11-23 22:18:19,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:18:19,456 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-11-23 22:18:19,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:19,457 INFO L225 Difference]: With dead ends: 31 [2019-11-23 22:18:19,457 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:18:19,458 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:18:19,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:18:19,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-23 22:18:19,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:18:19,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-11-23 22:18:19,469 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 12 [2019-11-23 22:18:19,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:19,470 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-11-23 22:18:19,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:18:19,470 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-11-23 22:18:19,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:18:19,471 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:19,471 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1] [2019-11-23 22:18:19,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:19,673 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:19,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:19,673 INFO L82 PathProgramCache]: Analyzing trace with hash -978793413, now seen corresponding path program 3 times [2019-11-23 22:18:19,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:19,674 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527435390] [2019-11-23 22:18:19,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:19,679 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:19,679 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818897500] [2019-11-23 22:18:19,679 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 22:18:19,705 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 22:18:19,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:19,706 WARN L253 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 22:18:19,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:19,842 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2019-11-23 22:18:19,844 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:20,061 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-11-23 22:18:20,080 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:22,107 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 22:18:22,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527435390] [2019-11-23 22:18:22,107 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:22,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818897500] [2019-11-23 22:18:22,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:22,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:18:22,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119757454] [2019-11-23 22:18:22,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:18:22,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:22,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:18:22,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:18:22,109 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 6 states. [2019-11-23 22:18:22,532 WARN L192 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2019-11-23 22:18:22,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:22,568 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2019-11-23 22:18:22,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:18:22,568 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-23 22:18:22,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:22,569 INFO L225 Difference]: With dead ends: 25 [2019-11-23 22:18:22,569 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 22:18:22,570 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:18:22,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 22:18:22,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2019-11-23 22:18:22,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 22:18:22,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-11-23 22:18:22,574 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2019-11-23 22:18:22,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:22,574 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-11-23 22:18:22,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:18:22,575 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-11-23 22:18:22,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:18:22,575 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:22,575 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:22,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:22,779 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:22,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:22,780 INFO L82 PathProgramCache]: Analyzing trace with hash -61603085, now seen corresponding path program 2 times [2019-11-23 22:18:22,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:22,781 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582791342] [2019-11-23 22:18:22,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:22,785 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:22,786 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568217462] [2019-11-23 22:18:22,786 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 22:18:22,987 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:18:22,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:18:22,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 22:18:22,990 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:18:25,102 WARN L192 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 38 DAG size of output: 14 [2019-11-23 22:18:25,123 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:18:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:18:25,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582791342] [2019-11-23 22:18:25,137 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:18:25,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568217462] [2019-11-23 22:18:25,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:18:25,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:18:25,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556234250] [2019-11-23 22:18:25,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:18:25,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:18:25,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:18:25,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:18:25,139 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2019-11-23 22:18:25,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:18:25,294 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-11-23 22:18:25,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:18:25,294 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-11-23 22:18:25,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:18:25,295 INFO L225 Difference]: With dead ends: 26 [2019-11-23 22:18:25,295 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 22:18:25,295 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:18:25,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 22:18:25,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-11-23 22:18:25,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 22:18:25,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-11-23 22:18:25,300 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 15 [2019-11-23 22:18:25,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:18:25,300 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-11-23 22:18:25,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:18:25,301 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-11-23 22:18:25,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 22:18:25,301 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:18:25,301 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:18:25,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:18:25,505 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:18:25,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:18:25,506 INFO L82 PathProgramCache]: Analyzing trace with hash 477406404, now seen corresponding path program 3 times [2019-11-23 22:18:25,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:18:25,507 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837393432] [2019-11-23 22:18:25,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:18:25,512 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:18:25,513 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402997315] [2019-11-23 22:18:25,513 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