/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/add-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:27:22,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:27:22,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:27:22,692 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:27:22,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:27:22,694 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:27:22,696 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:27:22,706 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:27:22,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:27:22,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:27:22,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:27:22,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:27:22,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:27:22,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:27:22,718 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:27:22,720 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:27:22,722 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:27:22,725 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:27:22,727 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:27:22,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:27:22,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:27:22,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:27:22,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:27:22,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:27:22,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:27:22,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:27:22,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:27:22,756 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:27:22,756 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 22:27:22,791 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:27:22,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:27:22,792 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:27:22,793 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:27:22,797 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:27:22,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:27:22,797 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:27:22,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:27:22,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:27:22,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:27:22,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:27:22,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:27:22,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:27:22,799 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:27:22,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:27:22,799 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:27:22,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:27:22,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:27:22,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:27:22,802 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:27:22,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:27:22,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:27:22,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:27:22,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:27:22,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:27:22,803 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:27:22,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:27:22,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:27:22,804 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 22:27:23,079 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:27:23,092 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:27:23,096 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:27:23,097 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:27:23,097 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:27:23,098 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/add-3-n-u.c [2019-11-06 22:27:23,165 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d838ea01/83e4ed2bec14489280af1cf59a441c3c/FLAGaa43f410f [2019-11-06 22:27:23,577 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:27:23,578 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/add-3-n-u.c [2019-11-06 22:27:23,585 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d838ea01/83e4ed2bec14489280af1cf59a441c3c/FLAGaa43f410f [2019-11-06 22:27:23,907 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d838ea01/83e4ed2bec14489280af1cf59a441c3c [2019-11-06 22:27:23,918 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:27:23,919 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:27:23,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:27:23,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:27:23,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:27:23,925 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:27:23" (1/1) ... [2019-11-06 22:27:23,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@535cd58e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:23, skipping insertion in model container [2019-11-06 22:27:23,929 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:27:23" (1/1) ... [2019-11-06 22:27:23,937 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:27:23,963 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:27:24,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:27:24,246 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:27:24,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:27:24,388 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:27:24,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:24 WrapperNode [2019-11-06 22:27:24,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:27:24,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:27:24,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:27:24,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:27:24,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:24" (1/1) ... [2019-11-06 22:27:24,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:24" (1/1) ... [2019-11-06 22:27:24,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:24" (1/1) ... [2019-11-06 22:27:24,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:24" (1/1) ... [2019-11-06 22:27:24,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:24" (1/1) ... [2019-11-06 22:27:24,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:24" (1/1) ... [2019-11-06 22:27:24,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:24" (1/1) ... [2019-11-06 22:27:24,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:27:24,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:27:24,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:27:24,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:27:24,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:24" (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 22:27:24,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:27:24,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:27:24,507 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 22:27:24,508 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:27:24,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:27:24,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 22:27:24,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-11-06 22:27:24,508 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:27:24,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 22:27:24,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 22:27:24,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 22:27:24,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 22:27:24,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:27:24,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:27:24,874 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:27:24,874 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-06 22:27:24,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:27:24 BoogieIcfgContainer [2019-11-06 22:27:24,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:27:24,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:27:24,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:27:24,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:27:24,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:27:23" (1/3) ... [2019-11-06 22:27:24,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d66e056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:27:24, skipping insertion in model container [2019-11-06 22:27:24,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:24" (2/3) ... [2019-11-06 22:27:24,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d66e056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:27:24, skipping insertion in model container [2019-11-06 22:27:24,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:27:24" (3/3) ... [2019-11-06 22:27:24,883 INFO L109 eAbstractionObserver]: Analyzing ICFG add-3-n-u.c [2019-11-06 22:27:24,893 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:27:24,901 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:27:24,913 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:27:24,937 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:27:24,937 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:27:24,937 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:27:24,938 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:27:24,938 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:27:24,938 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:27:24,938 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:27:24,938 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:27:24,957 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-11-06 22:27:24,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 22:27:24,963 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:27:24,964 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 22:27:24,967 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:27:24,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:27:24,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1773460249, now seen corresponding path program 1 times [2019-11-06 22:27:24,979 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:27:24,979 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548203353] [2019-11-06 22:27:24,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:27:25,053 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:27:25,054 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547292649] [2019-11-06 22:27:25,054 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 22:27:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:27:25,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-06 22:27:25,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:27:25,156 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 22:27:25,156 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:27:25,173 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 22:27:25,174 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548203353] [2019-11-06 22:27:25,174 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:27:25,175 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547292649] [2019-11-06 22:27:25,176 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:27:25,176 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-06 22:27:25,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741549868] [2019-11-06 22:27:25,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-06 22:27:25,184 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:27:25,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-06 22:27:25,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 22:27:25,203 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2019-11-06 22:27:25,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:27:25,232 INFO L93 Difference]: Finished difference Result 66 states and 103 transitions. [2019-11-06 22:27:25,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-06 22:27:25,234 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-11-06 22:27:25,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:27:25,243 INFO L225 Difference]: With dead ends: 66 [2019-11-06 22:27:25,243 INFO L226 Difference]: Without dead ends: 31 [2019-11-06 22:27:25,247 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 22:27:25,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-06 22:27:25,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-06 22:27:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-06 22:27:25,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2019-11-06 22:27:25,286 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 17 [2019-11-06 22:27:25,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:27:25,287 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2019-11-06 22:27:25,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-06 22:27:25,287 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2019-11-06 22:27:25,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 22:27:25,288 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:27:25,289 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 22:27:25,498 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:27:25,499 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:27:25,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:27:25,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1763514787, now seen corresponding path program 1 times [2019-11-06 22:27:25,501 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:27:25,501 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684690867] [2019-11-06 22:27:25,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:27:25,511 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:27:25,511 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251740765] [2019-11-06 22:27:25,512 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 22:27:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:27:25,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:27:25,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:27:25,608 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 22:27:25,609 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:27:25,636 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 22:27:25,640 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684690867] [2019-11-06 22:27:25,640 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:27:25,640 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251740765] [2019-11-06 22:27:25,641 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:27:25,641 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-06 22:27:25,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555468209] [2019-11-06 22:27:25,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:27:25,644 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:27:25,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:27:25,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:27:25,646 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 4 states. [2019-11-06 22:27:25,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:27:25,734 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2019-11-06 22:27:25,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:27:25,734 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-06 22:27:25,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:27:25,736 INFO L225 Difference]: With dead ends: 57 [2019-11-06 22:27:25,736 INFO L226 Difference]: Without dead ends: 37 [2019-11-06 22:27:25,737 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 22:27:25,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-06 22:27:25,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-06 22:27:25,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-06 22:27:25,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2019-11-06 22:27:25,746 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 17 [2019-11-06 22:27:25,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:27:25,746 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2019-11-06 22:27:25,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:27:25,746 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2019-11-06 22:27:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 22:27:25,747 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:27:25,748 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 22:27:25,951 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:27:25,952 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:27:25,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:27:25,952 INFO L82 PathProgramCache]: Analyzing trace with hash 340674109, now seen corresponding path program 1 times [2019-11-06 22:27:25,952 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:27:25,953 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691955995] [2019-11-06 22:27:25,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:27:25,962 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:27:25,962 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737388540] [2019-11-06 22:27:25,962 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 22:27:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:27:26,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:27:26,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:27:26,051 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 22:27:26,052 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:27:26,077 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 22:27:26,077 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691955995] [2019-11-06 22:27:26,078 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:27:26,078 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737388540] [2019-11-06 22:27:26,078 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:27:26,078 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-06 22:27:26,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302542420] [2019-11-06 22:27:26,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:27:26,080 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:27:26,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:27:26,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:27:26,082 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand 6 states. [2019-11-06 22:27:26,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:27:26,245 INFO L93 Difference]: Finished difference Result 85 states and 117 transitions. [2019-11-06 22:27:26,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:27:26,246 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-11-06 22:27:26,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:27:26,249 INFO L225 Difference]: With dead ends: 85 [2019-11-06 22:27:26,249 INFO L226 Difference]: Without dead ends: 58 [2019-11-06 22:27:26,250 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 22:27:26,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-06 22:27:26,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2019-11-06 22:27:26,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-06 22:27:26,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2019-11-06 22:27:26,264 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 23 [2019-11-06 22:27:26,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:27:26,264 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2019-11-06 22:27:26,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:27:26,265 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2019-11-06 22:27:26,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 22:27:26,266 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:27:26,266 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 22:27:26,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:27:26,470 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:27:26,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:27:26,470 INFO L82 PathProgramCache]: Analyzing trace with hash 964261373, now seen corresponding path program 1 times [2019-11-06 22:27:26,471 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:27:26,472 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886579076] [2019-11-06 22:27:26,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:27:26,480 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:27:26,480 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516389335] [2019-11-06 22:27:26,481 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 22:27:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:27:26,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:27:26,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:27:26,560 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 22:27:26,561 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:27:26,580 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 22:27:26,581 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886579076] [2019-11-06 22:27:26,581 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:27:26,581 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516389335] [2019-11-06 22:27:26,582 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:27:26,582 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-06 22:27:26,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103462767] [2019-11-06 22:27:26,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:27:26,583 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:27:26,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:27:26,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:27:26,584 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand 6 states. [2019-11-06 22:27:26,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:27:26,684 INFO L93 Difference]: Finished difference Result 124 states and 172 transitions. [2019-11-06 22:27:26,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:27:26,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2019-11-06 22:27:26,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:27:26,686 INFO L225 Difference]: With dead ends: 124 [2019-11-06 22:27:26,686 INFO L226 Difference]: Without dead ends: 78 [2019-11-06 22:27:26,687 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 22:27:26,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-06 22:27:26,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2019-11-06 22:27:26,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-06 22:27:26,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2019-11-06 22:27:26,701 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 35 [2019-11-06 22:27:26,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:27:26,701 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2019-11-06 22:27:26,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:27:26,701 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2019-11-06 22:27:26,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 22:27:26,703 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:27:26,703 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 22:27:26,906 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:27:26,907 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:27:26,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:27:26,907 INFO L82 PathProgramCache]: Analyzing trace with hash -331284355, now seen corresponding path program 1 times [2019-11-06 22:27:26,908 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:27:26,908 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258925225] [2019-11-06 22:27:26,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:27:26,928 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:27:26,928 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327200199] [2019-11-06 22:27:26,929 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 22:27:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:27:26,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 22:27:27,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:27:27,048 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 22:27:27,050 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:27:27,100 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 22:27:27,100 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258925225] [2019-11-06 22:27:27,100 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:27:27,101 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327200199] [2019-11-06 22:27:27,101 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1559279228] [2019-11-06 22:27:27,113 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 44 [2019-11-06 22:27:27,161 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:27:27,162 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:27:27,235 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:27:27,237 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 18 root evaluator evaluations with a maximum evaluation depth of 0. Performed 18 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 29 variables. [2019-11-06 22:27:27,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:27:27,242 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-11-06 22:27:27,319 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-11-06 22:27:27,320 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-11-06 22:27:27,325 INFO L553 sIntCurrentIteration]: We unified 42 AI predicates to 42 [2019-11-06 22:27:27,326 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-11-06 22:27:27,326 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:27:27,327 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6, 6] total 10 [2019-11-06 22:27:27,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735950394] [2019-11-06 22:27:27,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-06 22:27:27,328 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:27:27,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:27:27,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:27:27,330 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 2 states. [2019-11-06 22:27:27,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:27:27,338 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2019-11-06 22:27:27,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-06 22:27:27,339 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 43 [2019-11-06 22:27:27,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:27:27,347 INFO L225 Difference]: With dead ends: 75 [2019-11-06 22:27:27,347 INFO L226 Difference]: Without dead ends: 0 [2019-11-06 22:27:27,348 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 22:27:27,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-06 22:27:27,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-06 22:27:27,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-06 22:27:27,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-06 22:27:27,349 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2019-11-06 22:27:27,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:27:27,349 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-06 22:27:27,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-06 22:27:27,350 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-06 22:27:27,350 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-06 22:27:27,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:27:27,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-06 22:27:27,600 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-11-06 22:27:27,600 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-11-06 22:27:27,601 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-11-06 22:27:27,601 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-06 22:27:27,601 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-11-06 22:27:27,601 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-11-06 22:27:27,601 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-06 22:27:27,601 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 11 75) no Hoare annotation was computed. [2019-11-06 22:27:27,601 INFO L439 ceAbstractionStarter]: At program point L44-2(lines 44 51) the Hoare annotation is: false [2019-11-06 22:27:27,601 INFO L443 ceAbstractionStarter]: For program point L44-3(lines 44 51) no Hoare annotation was computed. [2019-11-06 22:27:27,601 INFO L439 ceAbstractionStarter]: At program point L61-2(lines 61 73) the Hoare annotation is: false [2019-11-06 22:27:27,601 INFO L439 ceAbstractionStarter]: At program point L28-2(lines 28 32) the Hoare annotation is: false [2019-11-06 22:27:27,602 INFO L443 ceAbstractionStarter]: For program point L61-3(lines 61 73) no Hoare annotation was computed. [2019-11-06 22:27:27,602 INFO L443 ceAbstractionStarter]: For program point L28-3(lines 28 32) no Hoare annotation was computed. [2019-11-06 22:27:27,602 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 11 75) no Hoare annotation was computed. [2019-11-06 22:27:27,602 INFO L439 ceAbstractionStarter]: At program point L46-2(lines 46 49) the Hoare annotation is: false [2019-11-06 22:27:27,602 INFO L443 ceAbstractionStarter]: For program point L46-3(lines 46 49) no Hoare annotation was computed. [2019-11-06 22:27:27,602 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 11 75) the Hoare annotation is: true [2019-11-06 22:27:27,602 INFO L439 ceAbstractionStarter]: At program point L64-2(lines 64 71) the Hoare annotation is: false [2019-11-06 22:27:27,602 INFO L443 ceAbstractionStarter]: For program point L64-3(lines 64 71) no Hoare annotation was computed. [2019-11-06 22:27:27,602 INFO L439 ceAbstractionStarter]: At program point L23-2(lines 23 36) the Hoare annotation is: false [2019-11-06 22:27:27,602 INFO L443 ceAbstractionStarter]: For program point L23-3(lines 23 36) no Hoare annotation was computed. [2019-11-06 22:27:27,602 INFO L439 ceAbstractionStarter]: At program point L41-2(lines 41 53) the Hoare annotation is: false [2019-11-06 22:27:27,603 INFO L443 ceAbstractionStarter]: For program point L41-3(lines 41 53) no Hoare annotation was computed. [2019-11-06 22:27:27,603 INFO L439 ceAbstractionStarter]: At program point L66-2(lines 66 69) the Hoare annotation is: false [2019-11-06 22:27:27,603 INFO L443 ceAbstractionStarter]: For program point L66-3(lines 66 69) no Hoare annotation was computed. [2019-11-06 22:27:27,603 INFO L439 ceAbstractionStarter]: At program point L67(line 67) the Hoare annotation is: false [2019-11-06 22:27:27,603 INFO L443 ceAbstractionStarter]: For program point L67-1(line 67) no Hoare annotation was computed. [2019-11-06 22:27:27,603 INFO L439 ceAbstractionStarter]: At program point L26-2(lines 26 34) the Hoare annotation is: false [2019-11-06 22:27:27,603 INFO L443 ceAbstractionStarter]: For program point L26-3(lines 26 34) no Hoare annotation was computed. [2019-11-06 22:27:27,603 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-11-06 22:27:27,603 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-06 22:27:27,603 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-11-06 22:27:27,604 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-06 22:27:27,604 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-06 22:27:27,604 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-11-06 22:27:27,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:27:27 BoogieIcfgContainer [2019-11-06 22:27:27,612 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-06 22:27:27,615 INFO L168 Benchmark]: Toolchain (without parser) took 3694.97 ms. Allocated memory was 146.3 MB in the beginning and 233.8 MB in the end (delta: 87.6 MB). Free memory was 103.4 MB in the beginning and 113.6 MB in the end (delta: -10.2 MB). Peak memory consumption was 77.3 MB. Max. memory is 7.1 GB. [2019-11-06 22:27:27,616 INFO L168 Benchmark]: CDTParser took 1.04 ms. Allocated memory is still 146.3 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-06 22:27:27,617 INFO L168 Benchmark]: CACSL2BoogieTranslator took 468.33 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 103.0 MB in the beginning and 182.8 MB in the end (delta: -79.8 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2019-11-06 22:27:27,618 INFO L168 Benchmark]: Boogie Preprocessor took 49.30 ms. Allocated memory is still 203.9 MB. Free memory was 182.8 MB in the beginning and 180.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-11-06 22:27:27,619 INFO L168 Benchmark]: RCFGBuilder took 433.97 ms. Allocated memory is still 203.9 MB. Free memory was 180.4 MB in the beginning and 161.9 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. [2019-11-06 22:27:27,620 INFO L168 Benchmark]: TraceAbstraction took 2735.69 ms. Allocated memory was 203.9 MB in the beginning and 233.8 MB in the end (delta: 29.9 MB). Free memory was 161.3 MB in the beginning and 113.6 MB in the end (delta: 47.6 MB). Peak memory consumption was 77.5 MB. Max. memory is 7.1 GB. [2019-11-06 22:27:27,624 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.04 ms. Allocated memory is still 146.3 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 468.33 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 103.0 MB in the beginning and 182.8 MB in the end (delta: -79.8 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 49.30 ms. Allocated memory is still 203.9 MB. Free memory was 182.8 MB in the beginning and 180.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 433.97 ms. Allocated memory is still 203.9 MB. Free memory was 180.4 MB in the beginning and 161.9 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2735.69 ms. Allocated memory was 203.9 MB in the beginning and 233.8 MB in the end (delta: 29.9 MB). Free memory was 161.3 MB in the beginning and 113.6 MB in the end (delta: 47.6 MB). Peak memory consumption was 77.5 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: 61]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 64]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 23]: 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: 2.6s, OverallIterations: 5, TraceHistogramMax: 8, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 142 SDtfs, 159 SDslu, 126 SDs, 0 SdLazy, 80 SolverSat, 76 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, 613 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 10 InterpolantComputations, 8 PerfectInterpolantSequences, 248/254 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: TIME[ms]: 131, ITERATIONS: 1, WAS_STRONG: 1, WEAKENING_RATIO: 0.9285714285714286, AVG_VARS_REMOVED_DURING_WEAKENING: 0.8571428571428571, 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...