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/loop-lit/gsv2008.c.i.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:06:32,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:06:32,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:06:32,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:06:32,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:06:32,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:06:32,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:06:32,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:06:32,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:06:32,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:06:32,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:06:32,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:06:32,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:06:32,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:06:32,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:06:32,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:06:32,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:06:32,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:06:32,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:06:32,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:06:32,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:06:32,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:06:32,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:06:32,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:06:32,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:06:32,827 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:06:32,827 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:06:32,829 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:06:32,831 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:06:32,832 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:06:32,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:06:32,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:06:32,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:06:32,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:06:32,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:06:32,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:06:32,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:06:32,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:06:32,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:06:32,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:06:32,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:06:32,840 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 [2019-10-13 21:06:32,862 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:06:32,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:06:32,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:06:32,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:06:32,867 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:06:32,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:06:32,867 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:06:32,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:06:32,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:06:32,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:06:32,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:06:32,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:06:32,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:06:32,869 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:06:32,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:06:32,869 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:06:32,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:06:32,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:06:32,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:06:32,870 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:06:32,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:06:32,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:06:32,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:06:32,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:06:32,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:06:32,875 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:06:32,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:06:32,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:06:32,875 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 [2019-10-13 21:06:33,142 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:06:33,159 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:06:33,162 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:06:33,164 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:06:33,164 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:06:33,165 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c [2019-10-13 21:06:33,226 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee0145361/a4e7c56e407a45c190a1d9387b7524ba/FLAG574fd4f21 [2019-10-13 21:06:33,658 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:06:33,659 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c [2019-10-13 21:06:33,665 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee0145361/a4e7c56e407a45c190a1d9387b7524ba/FLAG574fd4f21 [2019-10-13 21:06:34,073 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee0145361/a4e7c56e407a45c190a1d9387b7524ba [2019-10-13 21:06:34,083 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:06:34,085 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:06:34,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:06:34,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:06:34,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:06:34,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:06:34" (1/1) ... [2019-10-13 21:06:34,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@343d4392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:34, skipping insertion in model container [2019-10-13 21:06:34,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:06:34" (1/1) ... [2019-10-13 21:06:34,101 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:06:34,120 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:06:34,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:06:34,312 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:06:34,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:06:34,339 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:06:34,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:34 WrapperNode [2019-10-13 21:06:34,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:06:34,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:06:34,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:06:34,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:06:34,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:34" (1/1) ... [2019-10-13 21:06:34,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:34" (1/1) ... [2019-10-13 21:06:34,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:34" (1/1) ... [2019-10-13 21:06:34,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:34" (1/1) ... [2019-10-13 21:06:34,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:34" (1/1) ... [2019-10-13 21:06:34,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:34" (1/1) ... [2019-10-13 21:06:34,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:34" (1/1) ... [2019-10-13 21:06:34,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:06:34,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:06:34,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:06:34,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:06:34,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:34" (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 [2019-10-13 21:06:34,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:06:34,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:06:34,508 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:06:34,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:06:34,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 21:06:34,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 21:06:34,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:06:34,509 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:06:34,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:06:34,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:06:34,676 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:06:34,677 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-13 21:06:34,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:06:34 BoogieIcfgContainer [2019-10-13 21:06:34,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:06:34,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:06:34,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:06:34,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:06:34,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:06:34" (1/3) ... [2019-10-13 21:06:34,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@719ebcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:06:34, skipping insertion in model container [2019-10-13 21:06:34,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:34" (2/3) ... [2019-10-13 21:06:34,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@719ebcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:06:34, skipping insertion in model container [2019-10-13 21:06:34,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:06:34" (3/3) ... [2019-10-13 21:06:34,686 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.p+cfa-reducer.c [2019-10-13 21:06:34,694 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:06:34,701 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:06:34,710 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:06:34,736 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:06:34,736 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:06:34,736 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:06:34,737 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:06:34,737 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:06:34,737 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:06:34,737 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:06:34,737 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:06:34,754 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-10-13 21:06:34,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-13 21:06:34,760 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:06:34,761 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:06:34,763 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:06:34,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:06:34,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1277702393, now seen corresponding path program 1 times [2019-10-13 21:06:34,774 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:06:34,775 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301800144] [2019-10-13 21:06:34,775 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:34,775 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:34,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:06:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:06:34,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:06:34,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301800144] [2019-10-13 21:06:34,919 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:06:34,920 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:06:34,920 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942154975] [2019-10-13 21:06:34,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:06:34,925 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:06:34,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:06:34,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:06:34,937 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states. [2019-10-13 21:06:34,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:06:34,967 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-10-13 21:06:34,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:06:34,969 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-13 21:06:34,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:06:34,976 INFO L225 Difference]: With dead ends: 26 [2019-10-13 21:06:34,976 INFO L226 Difference]: Without dead ends: 13 [2019-10-13 21:06:34,979 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:06:34,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-13 21:06:35,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-13 21:06:35,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-13 21:06:35,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-13 21:06:35,007 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-10-13 21:06:35,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:06:35,007 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-13 21:06:35,007 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:06:35,007 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-13 21:06:35,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-13 21:06:35,008 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:06:35,008 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:06:35,008 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:06:35,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:06:35,009 INFO L82 PathProgramCache]: Analyzing trace with hash -954130992, now seen corresponding path program 1 times [2019-10-13 21:06:35,009 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:06:35,009 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728321198] [2019-10-13 21:06:35,009 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:35,010 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:35,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:06:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:06:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:06:35,089 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728321198] [2019-10-13 21:06:35,089 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53049842] [2019-10-13 21:06:35,089 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 [2019-10-13 21:06:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:06:35,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 21:06:35,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:06:35,234 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:06:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:06:35,263 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:06:35,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:06:35,327 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:06:35,327 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 8 [2019-10-13 21:06:35,328 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866715806] [2019-10-13 21:06:35,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:06:35,330 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:06:35,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:06:35,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:06:35,331 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-10-13 21:06:35,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:06:35,376 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-10-13 21:06:35,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:06:35,377 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-10-13 21:06:35,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:06:35,377 INFO L225 Difference]: With dead ends: 13 [2019-10-13 21:06:35,377 INFO L226 Difference]: Without dead ends: 0 [2019-10-13 21:06:35,379 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:06:35,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-13 21:06:35,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-13 21:06:35,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-13 21:06:35,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-13 21:06:35,380 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2019-10-13 21:06:35,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:06:35,381 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-13 21:06:35,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:06:35,381 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-13 21:06:35,381 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-13 21:06:35,586 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:06:35,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-13 21:06:35,660 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-10-13 21:06:35,661 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-10-13 21:06:35,661 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-13 21:06:35,661 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-13 21:06:35,662 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-13 21:06:35,662 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-13 21:06:35,663 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-13 21:06:35,663 INFO L439 ceAbstractionStarter]: At program point L32(lines 25 53) the Hoare annotation is: (or (<= (+ main_~main__x~0 2) main_~main__y~0) (<= (+ main_~main__x~0 50) 0)) [2019-10-13 21:06:35,664 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 8 55) the Hoare annotation is: true [2019-10-13 21:06:35,664 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 8 55) no Hoare annotation was computed. [2019-10-13 21:06:35,664 INFO L443 ceAbstractionStarter]: For program point L20(lines 20 53) no Hoare annotation was computed. [2019-10-13 21:06:35,665 INFO L443 ceAbstractionStarter]: For program point L14(lines 14 54) no Hoare annotation was computed. [2019-10-13 21:06:35,665 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 8 55) no Hoare annotation was computed. [2019-10-13 21:06:35,665 INFO L443 ceAbstractionStarter]: For program point L43(line 43) no Hoare annotation was computed. [2019-10-13 21:06:35,666 INFO L443 ceAbstractionStarter]: For program point L41(lines 41 50) no Hoare annotation was computed. [2019-10-13 21:06:35,666 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2019-10-13 21:06:35,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 09:06:35 BoogieIcfgContainer [2019-10-13 21:06:35,689 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-13 21:06:35,693 INFO L168 Benchmark]: Toolchain (without parser) took 1606.14 ms. Allocated memory was 143.7 MB in the beginning and 201.3 MB in the end (delta: 57.7 MB). Free memory was 100.0 MB in the beginning and 123.0 MB in the end (delta: -23.0 MB). Peak memory consumption was 34.7 MB. Max. memory is 7.1 GB. [2019-10-13 21:06:35,704 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 143.7 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-10-13 21:06:35,706 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.55 ms. Allocated memory is still 143.7 MB. Free memory was 99.8 MB in the beginning and 90.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-10-13 21:06:35,707 INFO L168 Benchmark]: Boogie Preprocessor took 110.45 ms. Allocated memory was 143.7 MB in the beginning and 201.3 MB in the end (delta: 57.7 MB). Free memory was 90.4 MB in the beginning and 179.9 MB in the end (delta: -89.5 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2019-10-13 21:06:35,708 INFO L168 Benchmark]: RCFGBuilder took 226.88 ms. Allocated memory is still 201.3 MB. Free memory was 179.9 MB in the beginning and 169.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2019-10-13 21:06:35,712 INFO L168 Benchmark]: TraceAbstraction took 1009.73 ms. Allocated memory is still 201.3 MB. Free memory was 168.6 MB in the beginning and 123.0 MB in the end (delta: 45.6 MB). Peak memory consumption was 45.6 MB. Max. memory is 7.1 GB. [2019-10-13 21:06:35,716 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 143.7 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.55 ms. Allocated memory is still 143.7 MB. Free memory was 99.8 MB in the beginning and 90.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.45 ms. Allocated memory was 143.7 MB in the beginning and 201.3 MB in the end (delta: 57.7 MB). Free memory was 90.4 MB in the beginning and 179.9 MB in the end (delta: -89.5 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 226.88 ms. Allocated memory is still 201.3 MB. Free memory was 179.9 MB in the beginning and 169.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1009.73 ms. Allocated memory is still 201.3 MB. Free memory was 168.6 MB in the beginning and 123.0 MB in the end (delta: 45.6 MB). Peak memory consumption was 45.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: 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: 25]: Loop Invariant Derived loop invariant: main__x + 2 <= main__y || main__x + 50 <= 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 16 locations, 1 error locations. Result: SAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 6 SDslu, 33 SDs, 0 SdLazy, 19 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 6 NumberOfFragments, 15 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 957 SizeOfPredicates, 6 NumberOfNonLiveVariables, 45 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 2/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...