/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/terminator_03-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:17:25,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:17:25,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:17:25,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:17:25,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:17:25,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:17:25,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:17:25,746 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:17:25,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:17:25,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:17:25,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:17:25,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:17:25,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:17:25,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:17:25,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:17:25,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:17:25,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:17:25,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:17:25,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:17:25,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:17:25,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:17:25,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:17:25,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:17:25,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:17:25,768 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:17:25,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:17:25,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:17:25,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:17:25,778 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 22:17:25,792 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:17:25,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:17:25,793 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:17:25,794 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:17:25,794 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:17:25,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:17:25,794 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:17:25,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:17:25,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:17:25,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:17:25,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:17:25,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:17:25,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:17:25,795 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:17:25,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:17:25,796 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:17:25,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:17:25,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:17:25,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:17:25,797 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:17:25,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:17:25,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:17:25,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:17:25,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:17:25,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:17:25,798 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:17:25,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:17:25,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:17:25,798 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:17:25,799 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 22:17:26,072 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:17:26,084 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:17:26,088 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:17:26,089 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:17:26,090 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:17:26,090 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_03-2.i [2020-07-20 22:17:26,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce911de56/510f3c3a9a6b419eb44dd4de99689233/FLAG9404ab512 [2020-07-20 22:17:26,625 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:17:26,625 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_03-2.i [2020-07-20 22:17:26,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce911de56/510f3c3a9a6b419eb44dd4de99689233/FLAG9404ab512 [2020-07-20 22:17:26,974 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce911de56/510f3c3a9a6b419eb44dd4de99689233 [2020-07-20 22:17:26,984 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:17:26,987 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:17:26,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:17:26,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:17:26,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:17:26,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:17:26" (1/1) ... [2020-07-20 22:17:26,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fae793e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:26, skipping insertion in model container [2020-07-20 22:17:26,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:17:26" (1/1) ... [2020-07-20 22:17:27,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:17:27,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:17:27,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:17:27,186 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:17:27,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:17:27,218 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:17:27,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:27 WrapperNode [2020-07-20 22:17:27,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:17:27,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:17:27,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:17:27,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:17:27,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:27" (1/1) ... [2020-07-20 22:17:27,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:27" (1/1) ... [2020-07-20 22:17:27,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:27" (1/1) ... [2020-07-20 22:17:27,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:27" (1/1) ... [2020-07-20 22:17:27,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:27" (1/1) ... [2020-07-20 22:17:27,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:27" (1/1) ... [2020-07-20 22:17:27,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:27" (1/1) ... [2020-07-20 22:17:27,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:17:27,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:17:27,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:17:27,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:17:27,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:27" (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 [2020-07-20 22:17:27,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:17:27,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:17:27,392 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:17:27,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:17:27,393 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:17:27,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:17:27,393 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:17:27,394 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:17:27,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:17:27,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:17:27,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 22:17:27,394 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:17:27,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:17:27,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:17:27,574 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:17:27,575 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 22:17:27,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:17:27 BoogieIcfgContainer [2020-07-20 22:17:27,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:17:27,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:17:27,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:17:27,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:17:27,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:17:26" (1/3) ... [2020-07-20 22:17:27,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a9c4672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:17:27, skipping insertion in model container [2020-07-20 22:17:27,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:27" (2/3) ... [2020-07-20 22:17:27,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a9c4672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:17:27, skipping insertion in model container [2020-07-20 22:17:27,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:17:27" (3/3) ... [2020-07-20 22:17:27,586 INFO L109 eAbstractionObserver]: Analyzing ICFG terminator_03-2.i [2020-07-20 22:17:27,596 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:17:27,603 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:17:27,616 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:17:27,639 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:17:27,639 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:17:27,639 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:17:27,640 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:17:27,640 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:17:27,640 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:17:27,640 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:17:27,640 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:17:27,658 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 22:17:27,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 22:17:27,664 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:17:27,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:17:27,666 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:17:27,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:17:27,672 INFO L82 PathProgramCache]: Analyzing trace with hash -961315073, now seen corresponding path program 1 times [2020-07-20 22:17:27,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:17:27,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010529512] [2020-07-20 22:17:27,679 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:17:27,742 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:17:27,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:17:27,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:17:27,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:17:27,841 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:17:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:17:27,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:17:27,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010529512] [2020-07-20 22:17:27,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:17:27,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:17:27,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24446362] [2020-07-20 22:17:27,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:17:27,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:17:27,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:17:27,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:17:27,895 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 22:17:27,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:17:27,986 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-07-20 22:17:27,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:17:27,989 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-07-20 22:17:27,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:17:27,996 INFO L225 Difference]: With dead ends: 40 [2020-07-20 22:17:27,996 INFO L226 Difference]: Without dead ends: 13 [2020-07-20 22:17:28,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:17:28,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-20 22:17:28,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-20 22:17:28,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-20 22:17:28,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-20 22:17:28,037 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-07-20 22:17:28,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:17:28,038 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-20 22:17:28,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:17:28,038 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-20 22:17:28,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 22:17:28,039 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:17:28,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:17:28,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:17:28,254 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:17:28,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:17:28,255 INFO L82 PathProgramCache]: Analyzing trace with hash -161295409, now seen corresponding path program 1 times [2020-07-20 22:17:28,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:17:28,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844864646] [2020-07-20 22:17:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:17:28,287 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:17:28,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:17:28,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:17:28,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:17:28,318 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:17:28,319 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:17:28,321 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:17:28,323 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:17:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:17:28,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:17:28,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844864646] [2020-07-20 22:17:28,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:17:28,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 22:17:28,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384808681] [2020-07-20 22:17:28,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:17:28,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:17:28,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:17:28,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:17:28,353 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2020-07-20 22:17:28,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:17:28,381 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-07-20 22:17:28,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:17:28,382 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-07-20 22:17:28,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:17:28,382 INFO L225 Difference]: With dead ends: 13 [2020-07-20 22:17:28,383 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 22:17:28,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:17:28,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 22:17:28,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 22:17:28,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 22:17:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 22:17:28,385 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2020-07-20 22:17:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:17:28,386 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 22:17:28,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:17:28,386 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 22:17:28,387 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 22:17:28,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:17:28,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 22:17:28,676 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 22:17:28,676 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:17:28,676 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:17:28,676 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 22:17:28,677 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 22:17:28,677 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 22:17:28,677 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:17:28,677 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 22:17:28,677 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:17:28,678 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:17:28,678 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 25) the Hoare annotation is: true [2020-07-20 22:17:28,678 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 25) no Hoare annotation was computed. [2020-07-20 22:17:28,678 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-07-20 22:17:28,678 INFO L268 CegarLoopResult]: For program point L18(lines 18 22) no Hoare annotation was computed. [2020-07-20 22:17:28,678 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-07-20 22:17:28,679 INFO L264 CegarLoopResult]: At program point L19-2(lines 19 21) the Hoare annotation is: (< 0 main_~y~0) [2020-07-20 22:17:28,679 INFO L264 CegarLoopResult]: At program point L18-1(lines 18 22) the Hoare annotation is: (or (<= 100 main_~x~0) (<= main_~y~0 0)) [2020-07-20 22:17:28,679 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 25) no Hoare annotation was computed. [2020-07-20 22:17:28,679 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-20 22:17:28,680 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-20 22:17:28,680 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 22:17:28,680 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-20 22:17:28,680 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-20 22:17:28,680 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-20 22:17:28,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:17:28 BoogieIcfgContainer [2020-07-20 22:17:28,697 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:17:28,700 INFO L168 Benchmark]: Toolchain (without parser) took 1713.24 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 103.2 MB in the beginning and 121.3 MB in the end (delta: -18.1 MB). Peak memory consumption was 45.9 MB. Max. memory is 7.1 GB. [2020-07-20 22:17:28,701 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 22:17:28,702 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.66 ms. Allocated memory is still 138.4 MB. Free memory was 102.8 MB in the beginning and 93.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-20 22:17:28,703 INFO L168 Benchmark]: Boogie Preprocessor took 30.08 ms. Allocated memory is still 138.4 MB. Free memory was 93.4 MB in the beginning and 92.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 22:17:28,704 INFO L168 Benchmark]: RCFGBuilder took 328.72 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 91.9 MB in the beginning and 169.5 MB in the end (delta: -77.7 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-20 22:17:28,705 INFO L168 Benchmark]: TraceAbstraction took 1118.00 ms. Allocated memory is still 202.4 MB. Free memory was 168.9 MB in the beginning and 121.3 MB in the end (delta: 47.6 MB). Peak memory consumption was 47.6 MB. Max. memory is 7.1 GB. [2020-07-20 22:17:28,710 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 230.66 ms. Allocated memory is still 138.4 MB. Free memory was 102.8 MB in the beginning and 93.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.08 ms. Allocated memory is still 138.4 MB. Free memory was 93.4 MB in the beginning and 92.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 328.72 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 91.9 MB in the beginning and 169.5 MB in the end (delta: -77.7 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1118.00 ms. Allocated memory is still 202.4 MB. Free memory was 168.9 MB in the beginning and 121.3 MB in the end (delta: 47.6 MB). Peak memory consumption was 47.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 19]: Loop Invariant Derived loop invariant: 0 < y - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 10 SDslu, 80 SDs, 0 SdLazy, 26 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 7 LocationsWithAnnotation, 9 PreInvPairs, 11 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 23 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 413 SizeOfPredicates, 4 NumberOfNonLiveVariables, 45 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...