/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 NUM_VARIABLES --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/ldv-regression/test_cut_trace.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:15:22,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:15:22,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:15:22,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 17:15:22,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:15:22,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:15:22,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:15:22,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:15:22,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:15:22,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:15:22,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:15:22,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:15:22,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:15:22,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:15:22,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:15:22,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:15:22,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:15:22,179 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 17:15:22,217 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:15:22,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:15:22,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:15:22,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:15:22,220 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:15:22,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:15:22,220 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:15:22,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:15:22,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:15:22,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:15:22,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:15:22,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:15:22,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:15:22,221 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:15:22,222 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:15:22,222 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:15:22,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:15:22,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:15:22,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:15:22,223 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:15:22,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:15:22,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:15:22,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:15:22,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:15:22,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:15:22,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:15:22,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:15:22,224 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:15:22,224 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:15:22,225 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 -> NUM_VARIABLES 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 17:15:22,556 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:15:22,579 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:15:22,584 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:15:22,594 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:15:22,595 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:15:22,597 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_cut_trace.i [2020-07-20 17:15:22,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b3cd3556/27fc8d32c9a74969987208f695771f7b/FLAG5529b0022 [2020-07-20 17:15:23,244 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:15:23,245 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_cut_trace.i [2020-07-20 17:15:23,252 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b3cd3556/27fc8d32c9a74969987208f695771f7b/FLAG5529b0022 [2020-07-20 17:15:23,585 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b3cd3556/27fc8d32c9a74969987208f695771f7b [2020-07-20 17:15:23,596 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:15:23,599 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:15:23,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:15:23,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:15:23,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:15:23,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:15:23" (1/1) ... [2020-07-20 17:15:23,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55fc409a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:15:23, skipping insertion in model container [2020-07-20 17:15:23,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:15:23" (1/1) ... [2020-07-20 17:15:23,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:15:23,635 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:15:23,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:15:23,836 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:15:23,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:15:23,863 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:15:23,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:15:23 WrapperNode [2020-07-20 17:15:23,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:15:23,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:15:23,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:15:23,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:15:23,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:15:23" (1/1) ... [2020-07-20 17:15:23,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:15:23" (1/1) ... [2020-07-20 17:15:23,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:15:23" (1/1) ... [2020-07-20 17:15:23,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:15:23" (1/1) ... [2020-07-20 17:15:23,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:15:23" (1/1) ... [2020-07-20 17:15:23,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:15:23" (1/1) ... [2020-07-20 17:15:23,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:15:23" (1/1) ... [2020-07-20 17:15:23,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:15:23,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:15:23,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:15:23,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:15:23,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:15:23" (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 17:15:24,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:15:24,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:15:24,072 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-07-20 17:15:24,072 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:15:24,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:15:24,073 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-07-20 17:15:24,073 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:15:24,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:15:24,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:15:24,219 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:15:24,219 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 17:15:24,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:15:24 BoogieIcfgContainer [2020-07-20 17:15:24,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:15:24,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:15:24,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:15:24,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:15:24,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:15:23" (1/3) ... [2020-07-20 17:15:24,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18bfebd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:15:24, skipping insertion in model container [2020-07-20 17:15:24,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:15:23" (2/3) ... [2020-07-20 17:15:24,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18bfebd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:15:24, skipping insertion in model container [2020-07-20 17:15:24,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:15:24" (3/3) ... [2020-07-20 17:15:24,234 INFO L109 eAbstractionObserver]: Analyzing ICFG test_cut_trace.i [2020-07-20 17:15:24,244 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:15:24,251 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:15:24,264 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:15:24,296 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:15:24,296 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:15:24,296 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:15:24,297 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:15:24,297 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:15:24,297 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:15:24,298 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:15:24,298 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:15:24,322 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-20 17:15:24,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-20 17:15:24,329 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:15:24,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:15:24,331 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:15:24,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:15:24,339 INFO L82 PathProgramCache]: Analyzing trace with hash -417355086, now seen corresponding path program 1 times [2020-07-20 17:15:24,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:15:24,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698452943] [2020-07-20 17:15:24,350 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 17:15:24,414 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:15:24,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:15:24,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:15:24,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:15:24,467 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 17:15:24,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:15:24,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698452943] [2020-07-20 17:15:24,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:15:24,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:15:24,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577826107] [2020-07-20 17:15:24,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:15:24,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:15:24,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:15:24,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:15:24,497 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-07-20 17:15:24,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:15:24,529 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-07-20 17:15:24,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:15:24,531 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-20 17:15:24,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:15:24,539 INFO L225 Difference]: With dead ends: 29 [2020-07-20 17:15:24,540 INFO L226 Difference]: Without dead ends: 11 [2020-07-20 17:15:24,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:15:24,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-07-20 17:15:24,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-07-20 17:15:24,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-07-20 17:15:24,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 10 transitions. [2020-07-20 17:15:24,582 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 10 transitions. Word has length 8 [2020-07-20 17:15:24,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:15:24,583 INFO L479 AbstractCegarLoop]: Abstraction has 11 states and 10 transitions. [2020-07-20 17:15:24,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:15:24,583 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 10 transitions. [2020-07-20 17:15:24,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 17:15:24,584 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:15:24,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:15:24,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:15:24,787 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:15:24,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:15:24,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1648524013, now seen corresponding path program 1 times [2020-07-20 17:15:24,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:15:24,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190054303] [2020-07-20 17:15:24,789 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 17:15:24,815 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:15:24,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:15:24,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:15:24,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:15:24,866 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 17:15:24,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:15:24,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190054303] [2020-07-20 17:15:24,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:15:24,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:15:24,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809721241] [2020-07-20 17:15:24,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:15:24,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:15:24,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:15:24,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:15:24,876 INFO L87 Difference]: Start difference. First operand 11 states and 10 transitions. Second operand 4 states. [2020-07-20 17:15:24,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:15:24,945 INFO L93 Difference]: Finished difference Result 11 states and 10 transitions. [2020-07-20 17:15:24,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:15:24,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-07-20 17:15:24,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:15:24,947 INFO L225 Difference]: With dead ends: 11 [2020-07-20 17:15:24,947 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 17:15:24,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:15:24,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 17:15:24,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 17:15:24,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 17:15:24,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 17:15:24,950 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-07-20 17:15:24,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:15:24,951 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 17:15:24,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:15:24,951 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 17:15:24,952 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 17:15:25,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:15:25,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 17:15:25,248 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 17:15:25,248 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:15:25,249 INFO L268 CegarLoopResult]: For program point __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2020-07-20 17:15:25,249 INFO L268 CegarLoopResult]: For program point __blast_assertEXIT(lines 4 7) no Hoare annotation was computed. [2020-07-20 17:15:25,249 INFO L268 CegarLoopResult]: For program point __blast_assertFINAL(lines 4 7) no Hoare annotation was computed. [2020-07-20 17:15:25,249 INFO L271 CegarLoopResult]: At program point __blast_assertENTRY(lines 4 7) the Hoare annotation is: true [2020-07-20 17:15:25,250 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:15:25,250 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 17:15:25,250 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 17:15:25,250 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 17:15:25,251 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 20) the Hoare annotation is: true [2020-07-20 17:15:25,251 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 20) no Hoare annotation was computed. [2020-07-20 17:15:25,251 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-07-20 17:15:25,251 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-20 17:15:25,252 INFO L264 CegarLoopResult]: At program point L18-2(line 18) the Hoare annotation is: false [2020-07-20 17:15:25,252 INFO L268 CegarLoopResult]: For program point L18-3(line 18) no Hoare annotation was computed. [2020-07-20 17:15:25,252 INFO L264 CegarLoopResult]: At program point L16-2(line 16) the Hoare annotation is: false [2020-07-20 17:15:25,252 INFO L268 CegarLoopResult]: For program point L16-3(line 16) no Hoare annotation was computed. [2020-07-20 17:15:25,252 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 20) no Hoare annotation was computed. [2020-07-20 17:15:25,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:15:25 BoogieIcfgContainer [2020-07-20 17:15:25,261 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:15:25,264 INFO L168 Benchmark]: Toolchain (without parser) took 1665.12 ms. Allocated memory was 142.6 MB in the beginning and 201.9 MB in the end (delta: 59.2 MB). Free memory was 100.6 MB in the beginning and 137.4 MB in the end (delta: -36.7 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-07-20 17:15:25,265 INFO L168 Benchmark]: CDTParser took 0.60 ms. Allocated memory is still 142.6 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 17:15:25,268 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.81 ms. Allocated memory is still 142.6 MB. Free memory was 100.2 MB in the beginning and 91.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-20 17:15:25,271 INFO L168 Benchmark]: Boogie Preprocessor took 29.89 ms. Allocated memory is still 142.6 MB. Free memory was 91.2 MB in the beginning and 89.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 17:15:25,273 INFO L168 Benchmark]: RCFGBuilder took 329.90 ms. Allocated memory was 142.6 MB in the beginning and 201.9 MB in the end (delta: 59.2 MB). Free memory was 89.8 MB in the beginning and 171.6 MB in the end (delta: -81.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-20 17:15:25,274 INFO L168 Benchmark]: TraceAbstraction took 1034.63 ms. Allocated memory is still 201.9 MB. Free memory was 171.6 MB in the beginning and 137.4 MB in the end (delta: 34.2 MB). Peak memory consumption was 34.2 MB. Max. memory is 7.1 GB. [2020-07-20 17:15:25,278 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.60 ms. Allocated memory is still 142.6 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.81 ms. Allocated memory is still 142.6 MB. Free memory was 100.2 MB in the beginning and 91.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.89 ms. Allocated memory is still 142.6 MB. Free memory was 91.2 MB in the beginning and 89.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 329.90 ms. Allocated memory was 142.6 MB in the beginning and 201.9 MB in the end (delta: 59.2 MB). Free memory was 89.8 MB in the beginning and 171.6 MB in the end (delta: -81.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1034.63 ms. Allocated memory is still 201.9 MB. Free memory was 171.6 MB in the beginning and 137.4 MB in the end (delta: 34.2 MB). Peak memory consumption was 34.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 7 SDslu, 16 SDs, 0 SdLazy, 6 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 9 NumberOfFragments, 7 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 18 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 198 SizeOfPredicates, 1 NumberOfNonLiveVariables, 33 ConjunctsInSsa, 8 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...