/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/array-multidimensional/rev-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:27:37,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:27:37,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:27:37,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:27:37,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:27:37,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:27:37,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:27:37,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:27:37,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:27:37,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:27:37,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:27:37,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:27:37,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:27:37,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:27:37,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:27:37,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:27:37,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:27:37,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:27:37,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:27:37,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:27:37,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:27:37,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:27:37,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:27:37,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:27:37,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:27:37,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:27:37,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:27:37,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:27:37,435 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 [2019-11-06 22:27:37,466 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:27:37,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:27:37,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:27:37,470 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:27:37,471 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:27:37,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:27:37,471 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:27:37,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:27:37,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:27:37,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:27:37,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:27:37,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:27:37,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:27:37,476 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:27:37,476 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:27:37,476 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:27:37,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:27:37,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:27:37,477 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:27:37,477 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:27:37,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:27:37,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:27:37,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:27:37,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:27:37,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:27:37,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:27:37,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:27:37,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:27:37,482 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:27:37,804 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:27:37,827 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:27:37,831 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:27:37,832 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:27:37,833 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:27:37,834 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/rev-3-u.c [2019-11-06 22:27:37,912 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e3c3b47a/49ad8338ab084867ab647518012ab04c/FLAG8b4f516ab [2019-11-06 22:27:38,336 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:27:38,338 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/rev-3-u.c [2019-11-06 22:27:38,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e3c3b47a/49ad8338ab084867ab647518012ab04c/FLAG8b4f516ab [2019-11-06 22:27:38,682 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e3c3b47a/49ad8338ab084867ab647518012ab04c [2019-11-06 22:27:38,692 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:27:38,693 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:27:38,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:27:38,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:27:38,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:27:38,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:27:38" (1/1) ... [2019-11-06 22:27:38,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ebc7148 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:38, skipping insertion in model container [2019-11-06 22:27:38,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:27:38" (1/1) ... [2019-11-06 22:27:38,709 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:27:38,727 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:27:38,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:27:38,983 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:27:39,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:27:39,145 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:27:39,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:39 WrapperNode [2019-11-06 22:27:39,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:27:39,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:27:39,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:27:39,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:27:39,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:39" (1/1) ... [2019-11-06 22:27:39,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:39" (1/1) ... [2019-11-06 22:27:39,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:39" (1/1) ... [2019-11-06 22:27:39,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:39" (1/1) ... [2019-11-06 22:27:39,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:39" (1/1) ... [2019-11-06 22:27:39,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:39" (1/1) ... [2019-11-06 22:27:39,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:39" (1/1) ... [2019-11-06 22:27:39,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:27:39,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:27:39,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:27:39,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:27:39,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:39" (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 [2019-11-06 22:27:39,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:27:39,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:27:39,295 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 22:27:39,296 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:27:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:27:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 22:27:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:27:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:27:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 22:27:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 22:27:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 22:27:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 22:27:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:27:39,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:27:39,599 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:27:39,599 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-06 22:27:39,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:27:39 BoogieIcfgContainer [2019-11-06 22:27:39,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:27:39,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:27:39,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:27:39,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:27:39,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:27:38" (1/3) ... [2019-11-06 22:27:39,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a0be6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:27:39, skipping insertion in model container [2019-11-06 22:27:39,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:39" (2/3) ... [2019-11-06 22:27:39,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a0be6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:27:39, skipping insertion in model container [2019-11-06 22:27:39,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:27:39" (3/3) ... [2019-11-06 22:27:39,609 INFO L109 eAbstractionObserver]: Analyzing ICFG rev-3-u.c [2019-11-06 22:27:39,620 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:27:39,631 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:27:39,645 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:27:39,674 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:27:39,674 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:27:39,674 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:27:39,674 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:27:39,675 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:27:39,675 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:27:39,675 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:27:39,675 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:27:39,697 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-11-06 22:27:39,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 22:27:39,710 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:27:39,711 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:27:39,713 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:27:39,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:27:39,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1773460249, now seen corresponding path program 1 times [2019-11-06 22:27:39,725 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:27:39,726 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354916266] [2019-11-06 22:27:39,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:27:39,803 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:27:39,804 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1233810735] [2019-11-06 22:27:39,805 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 [2019-11-06 22:27:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:27:39,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-06 22:27:39,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:27:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:27:39,955 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:27:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:27:39,992 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354916266] [2019-11-06 22:27:39,992 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:27:39,992 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233810735] [2019-11-06 22:27:39,993 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:27:39,993 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-06 22:27:39,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338756576] [2019-11-06 22:27:39,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-06 22:27:40,001 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:27:40,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-06 22:27:40,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 22:27:40,015 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2019-11-06 22:27:40,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:27:40,039 INFO L93 Difference]: Finished difference Result 66 states and 103 transitions. [2019-11-06 22:27:40,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-06 22:27:40,041 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-11-06 22:27:40,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:27:40,050 INFO L225 Difference]: With dead ends: 66 [2019-11-06 22:27:40,050 INFO L226 Difference]: Without dead ends: 31 [2019-11-06 22:27:40,053 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 22:27:40,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-06 22:27:40,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-06 22:27:40,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-06 22:27:40,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2019-11-06 22:27:40,092 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 17 [2019-11-06 22:27:40,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:27:40,093 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2019-11-06 22:27:40,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-06 22:27:40,093 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2019-11-06 22:27:40,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 22:27:40,094 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:27:40,094 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:27:40,296 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:27:40,299 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:27:40,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:27:40,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1763514787, now seen corresponding path program 1 times [2019-11-06 22:27:40,300 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:27:40,301 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300699273] [2019-11-06 22:27:40,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:27:40,323 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:27:40,323 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399305873] [2019-11-06 22:27:40,323 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 [2019-11-06 22:27:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:27:40,374 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:27:40,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:27:40,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:27:40,436 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:27:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:27:40,457 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300699273] [2019-11-06 22:27:40,457 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:27:40,457 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399305873] [2019-11-06 22:27:40,457 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:27:40,457 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-06 22:27:40,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879734738] [2019-11-06 22:27:40,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:27:40,461 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:27:40,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:27:40,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:27:40,462 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 4 states. [2019-11-06 22:27:40,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:27:40,559 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2019-11-06 22:27:40,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:27:40,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-06 22:27:40,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:27:40,561 INFO L225 Difference]: With dead ends: 57 [2019-11-06 22:27:40,562 INFO L226 Difference]: Without dead ends: 37 [2019-11-06 22:27:40,563 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:27:40,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-06 22:27:40,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-06 22:27:40,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-06 22:27:40,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2019-11-06 22:27:40,572 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 17 [2019-11-06 22:27:40,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:27:40,572 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2019-11-06 22:27:40,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:27:40,572 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2019-11-06 22:27:40,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 22:27:40,574 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:27:40,574 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:27:40,777 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:27:40,778 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:27:40,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:27:40,779 INFO L82 PathProgramCache]: Analyzing trace with hash 340674109, now seen corresponding path program 1 times [2019-11-06 22:27:40,779 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:27:40,780 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714245532] [2019-11-06 22:27:40,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:27:40,790 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:27:40,790 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359657747] [2019-11-06 22:27:40,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:27:40,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:27:40,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:27:40,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:27:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 22:27:40,874 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:27:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 22:27:40,902 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714245532] [2019-11-06 22:27:40,902 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:27:40,902 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359657747] [2019-11-06 22:27:40,902 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:27:40,903 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-06 22:27:40,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000213617] [2019-11-06 22:27:40,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:27:40,904 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:27:40,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:27:40,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:27:40,905 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand 6 states. [2019-11-06 22:27:41,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:27:41,087 INFO L93 Difference]: Finished difference Result 85 states and 117 transitions. [2019-11-06 22:27:41,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:27:41,087 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-11-06 22:27:41,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:27:41,090 INFO L225 Difference]: With dead ends: 85 [2019-11-06 22:27:41,091 INFO L226 Difference]: Without dead ends: 58 [2019-11-06 22:27:41,091 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:27:41,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-06 22:27:41,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2019-11-06 22:27:41,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-06 22:27:41,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2019-11-06 22:27:41,106 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 23 [2019-11-06 22:27:41,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:27:41,107 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2019-11-06 22:27:41,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:27:41,107 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2019-11-06 22:27:41,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 22:27:41,108 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:27:41,108 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:27:41,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:27:41,317 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:27:41,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:27:41,318 INFO L82 PathProgramCache]: Analyzing trace with hash 964261373, now seen corresponding path program 1 times [2019-11-06 22:27:41,318 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:27:41,318 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786675441] [2019-11-06 22:27:41,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:27:41,327 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:27:41,327 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268269170] [2019-11-06 22:27:41,327 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 [2019-11-06 22:27:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:27:41,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:27:41,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:27:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 22:27:41,430 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:27:41,457 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 22:27:41,457 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786675441] [2019-11-06 22:27:41,457 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:27:41,458 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268269170] [2019-11-06 22:27:41,458 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:27:41,458 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-06 22:27:41,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774394322] [2019-11-06 22:27:41,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:27:41,459 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:27:41,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:27:41,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:27:41,460 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand 6 states. [2019-11-06 22:27:41,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:27:41,584 INFO L93 Difference]: Finished difference Result 124 states and 172 transitions. [2019-11-06 22:27:41,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:27:41,584 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2019-11-06 22:27:41,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:27:41,586 INFO L225 Difference]: With dead ends: 124 [2019-11-06 22:27:41,586 INFO L226 Difference]: Without dead ends: 78 [2019-11-06 22:27:41,587 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:27:41,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-06 22:27:41,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2019-11-06 22:27:41,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-06 22:27:41,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2019-11-06 22:27:41,602 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 35 [2019-11-06 22:27:41,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:27:41,602 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2019-11-06 22:27:41,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:27:41,602 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2019-11-06 22:27:41,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 22:27:41,603 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:27:41,604 INFO L410 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:27:41,816 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:27:41,817 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:27:41,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:27:41,817 INFO L82 PathProgramCache]: Analyzing trace with hash -331284355, now seen corresponding path program 1 times [2019-11-06 22:27:41,818 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:27:41,818 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343767227] [2019-11-06 22:27:41,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:27:41,830 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:27:41,831 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655684340] [2019-11-06 22:27:41,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:27:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:27:41,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 22:27:41,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:27:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-06 22:27:41,941 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:27:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-06 22:27:41,996 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343767227] [2019-11-06 22:27:41,996 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:27:41,996 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655684340] [2019-11-06 22:27:41,996 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [985508402] [2019-11-06 22:27:42,012 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 44 [2019-11-06 22:27:42,068 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:27:42,069 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:27:42,120 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:27:42,122 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 16 root evaluator evaluations with a maximum evaluation depth of 0. Performed 16 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 23 variables. [2019-11-06 22:27:42,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:27:42,126 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-11-06 22:27:42,164 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-11-06 22:27:42,164 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-11-06 22:27:42,166 INFO L553 sIntCurrentIteration]: We unified 42 AI predicates to 42 [2019-11-06 22:27:42,166 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-11-06 22:27:42,167 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:27:42,167 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6, 6] total 10 [2019-11-06 22:27:42,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868478288] [2019-11-06 22:27:42,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-06 22:27:42,168 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:27:42,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:27:42,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:27:42,169 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 2 states. [2019-11-06 22:27:42,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:27:42,173 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2019-11-06 22:27:42,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-06 22:27:42,173 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 43 [2019-11-06 22:27:42,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:27:42,174 INFO L225 Difference]: With dead ends: 75 [2019-11-06 22:27:42,174 INFO L226 Difference]: Without dead ends: 0 [2019-11-06 22:27:42,175 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:27:42,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-06 22:27:42,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-06 22:27:42,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-06 22:27:42,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-06 22:27:42,176 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2019-11-06 22:27:42,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:27:42,176 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-06 22:27:42,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-06 22:27:42,176 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-06 22:27:42,176 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-06 22:27:42,380 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:27:42,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-06 22:27:42,425 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-11-06 22:27:42,426 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-11-06 22:27:42,426 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-11-06 22:27:42,426 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-06 22:27:42,426 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-11-06 22:27:42,426 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-11-06 22:27:42,427 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-06 22:27:42,427 INFO L443 ceAbstractionStarter]: For program point L68-3(lines 68 71) no Hoare annotation was computed. [2019-11-06 22:27:42,427 INFO L439 ceAbstractionStarter]: At program point L27-2(lines 27 34) the Hoare annotation is: false [2019-11-06 22:27:42,427 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 11 77) no Hoare annotation was computed. [2019-11-06 22:27:42,427 INFO L443 ceAbstractionStarter]: For program point L27-3(lines 27 34) no Hoare annotation was computed. [2019-11-06 22:27:42,427 INFO L439 ceAbstractionStarter]: At program point L69(line 69) the Hoare annotation is: false [2019-11-06 22:27:42,428 INFO L443 ceAbstractionStarter]: For program point L69-1(line 69) no Hoare annotation was computed. [2019-11-06 22:27:42,428 INFO L439 ceAbstractionStarter]: At program point L29-2(lines 29 32) the Hoare annotation is: false [2019-11-06 22:27:42,428 INFO L443 ceAbstractionStarter]: For program point L29-3(lines 29 32) no Hoare annotation was computed. [2019-11-06 22:27:42,428 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 11 77) no Hoare annotation was computed. [2019-11-06 22:27:42,428 INFO L439 ceAbstractionStarter]: At program point L46-2(lines 46 53) the Hoare annotation is: false [2019-11-06 22:27:42,429 INFO L443 ceAbstractionStarter]: For program point L46-3(lines 46 53) no Hoare annotation was computed. [2019-11-06 22:27:42,429 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 11 77) the Hoare annotation is: true [2019-11-06 22:27:42,429 INFO L439 ceAbstractionStarter]: At program point L63-2(lines 63 75) the Hoare annotation is: false [2019-11-06 22:27:42,429 INFO L443 ceAbstractionStarter]: For program point L63-3(lines 63 75) no Hoare annotation was computed. [2019-11-06 22:27:42,429 INFO L439 ceAbstractionStarter]: At program point L48-2(lines 48 51) the Hoare annotation is: false [2019-11-06 22:27:42,429 INFO L443 ceAbstractionStarter]: For program point L48-3(lines 48 51) no Hoare annotation was computed. [2019-11-06 22:27:42,429 INFO L439 ceAbstractionStarter]: At program point L24-2(lines 24 36) the Hoare annotation is: false [2019-11-06 22:27:42,430 INFO L443 ceAbstractionStarter]: For program point L24-3(lines 24 36) no Hoare annotation was computed. [2019-11-06 22:27:42,430 INFO L439 ceAbstractionStarter]: At program point L66-2(lines 66 73) the Hoare annotation is: false [2019-11-06 22:27:42,430 INFO L443 ceAbstractionStarter]: For program point L66-3(lines 66 73) no Hoare annotation was computed. [2019-11-06 22:27:42,430 INFO L439 ceAbstractionStarter]: At program point L43-2(lines 43 55) the Hoare annotation is: false [2019-11-06 22:27:42,430 INFO L443 ceAbstractionStarter]: For program point L43-3(lines 43 55) no Hoare annotation was computed. [2019-11-06 22:27:42,430 INFO L439 ceAbstractionStarter]: At program point L68-2(lines 68 71) the Hoare annotation is: false [2019-11-06 22:27:42,431 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-11-06 22:27:42,431 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-06 22:27:42,431 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-11-06 22:27:42,431 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-06 22:27:42,431 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-06 22:27:42,431 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-11-06 22:27:42,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:27:42 BoogieIcfgContainer [2019-11-06 22:27:42,440 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-06 22:27:42,444 INFO L168 Benchmark]: Toolchain (without parser) took 3749.71 ms. Allocated memory was 146.8 MB in the beginning and 232.8 MB in the end (delta: 86.0 MB). Free memory was 104.4 MB in the beginning and 108.1 MB in the end (delta: -3.7 MB). Peak memory consumption was 82.3 MB. Max. memory is 7.1 GB. [2019-11-06 22:27:42,445 INFO L168 Benchmark]: CDTParser took 1.23 ms. Allocated memory is still 146.8 MB. Free memory was 123.2 MB in the beginning and 123.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-06 22:27:42,446 INFO L168 Benchmark]: CACSL2BoogieTranslator took 451.33 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 104.2 MB in the beginning and 182.2 MB in the end (delta: -78.0 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. [2019-11-06 22:27:42,449 INFO L168 Benchmark]: Boogie Preprocessor took 72.61 ms. Allocated memory is still 204.5 MB. Free memory was 182.2 MB in the beginning and 180.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2019-11-06 22:27:42,450 INFO L168 Benchmark]: RCFGBuilder took 378.26 ms. Allocated memory is still 204.5 MB. Free memory was 180.3 MB in the beginning and 162.2 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. [2019-11-06 22:27:42,452 INFO L168 Benchmark]: TraceAbstraction took 2837.87 ms. Allocated memory was 204.5 MB in the beginning and 232.8 MB in the end (delta: 28.3 MB). Free memory was 162.2 MB in the beginning and 108.1 MB in the end (delta: 54.1 MB). Peak memory consumption was 82.4 MB. Max. memory is 7.1 GB. [2019-11-06 22:27:42,459 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.23 ms. Allocated memory is still 146.8 MB. Free memory was 123.2 MB in the beginning and 123.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 451.33 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 104.2 MB in the beginning and 182.2 MB in the end (delta: -78.0 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 72.61 ms. Allocated memory is still 204.5 MB. Free memory was 182.2 MB in the beginning and 180.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 378.26 ms. Allocated memory is still 204.5 MB. Free memory was 180.3 MB in the beginning and 162.2 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2837.87 ms. Allocated memory was 204.5 MB in the beginning and 232.8 MB in the end (delta: 28.3 MB). Free memory was 162.2 MB in the beginning and 108.1 MB in the end (delta: 54.1 MB). Peak memory consumption was 82.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 68]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 63]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 48]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 43]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 66]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 36 locations, 1 error locations. Result: SAFE, OverallTime: 2.7s, OverallIterations: 5, TraceHistogramMax: 8, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 114 SDtfs, 147 SDslu, 100 SDs, 0 SdLazy, 134 SolverSat, 88 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 267 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 23 PreInvPairs, 23 NumberOfFragments, 15 HoareAnnotationTreeSize, 23 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 15 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 135 NumberOfCodeBlocks, 135 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 260 ConstructedInterpolants, 0 QuantifiedInterpolants, 10280 SizeOfPredicates, 8 NumberOfNonLiveVariables, 569 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 10 InterpolantComputations, 8 PerfectInterpolantSequences, 248/254 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: TIME[ms]: 120, ITERATIONS: 1, WAS_STRONG: 1, WEAKENING_RATIO: 0.9523809523809523, AVG_VARS_REMOVED_DURING_WEAKENING: 0.7380952380952381, AVG_WEAKENED_CONJUNCTS: 0.14285714285714285, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...