/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/string-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:16:17,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:16:17,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:16:17,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:16:17,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:16:17,363 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:16:17,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:16:17,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:16:17,370 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:16:17,371 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:16:17,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:16:17,373 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:16:17,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:16:17,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:16:17,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:16:17,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:16:17,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:16:17,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:16:17,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:16:17,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:16:17,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:16:17,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:16:17,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:16:17,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:16:17,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:16:17,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:16:17,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:16:17,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:16:17,410 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 22:16:17,426 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:16:17,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:16:17,429 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:16:17,430 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:16:17,430 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:16:17,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:16:17,431 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:16:17,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:16:17,431 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:16:17,431 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:16:17,431 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:16:17,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:16:17,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:16:17,432 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:16:17,432 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:16:17,432 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:16:17,432 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:16:17,433 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:16:17,433 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:16:17,433 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:16:17,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:16:17,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:16:17,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:16:17,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:16:17,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:16:17,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:16:17,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:17,435 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:16:17,435 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:16:17,435 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 22:16:17,764 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:16:17,778 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:16:17,783 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:16:17,784 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:16:17,785 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:16:17,786 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-2.i [2020-07-20 22:16:17,865 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/320cf8287/1b1788a567fc4d67b952ce36d2d29396/FLAGcf58ce6e1 [2020-07-20 22:16:18,427 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:16:18,429 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-2.i [2020-07-20 22:16:18,443 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/320cf8287/1b1788a567fc4d67b952ce36d2d29396/FLAGcf58ce6e1 [2020-07-20 22:16:18,731 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/320cf8287/1b1788a567fc4d67b952ce36d2d29396 [2020-07-20 22:16:18,748 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:16:18,752 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:16:18,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:16:18,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:16:18,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:16:18,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:16:18" (1/1) ... [2020-07-20 22:16:18,765 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ecad081 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:18, skipping insertion in model container [2020-07-20 22:16:18,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:16:18" (1/1) ... [2020-07-20 22:16:18,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:16:18,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:16:19,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:16:19,062 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:16:19,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:16:19,115 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:16:19,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:19 WrapperNode [2020-07-20 22:16:19,116 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:16:19,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:16:19,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:16:19,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:16:19,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:19" (1/1) ... [2020-07-20 22:16:19,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:19" (1/1) ... [2020-07-20 22:16:19,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:19" (1/1) ... [2020-07-20 22:16:19,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:19" (1/1) ... [2020-07-20 22:16:19,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:19" (1/1) ... [2020-07-20 22:16:19,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:19" (1/1) ... [2020-07-20 22:16:19,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:19" (1/1) ... [2020-07-20 22:16:19,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:16:19,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:16:19,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:16:19,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:16:19,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:19" (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 22:16:19,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:16:19,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:16:19,367 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:16:19,367 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:16:19,367 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:16:19,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:16:19,368 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:16:19,368 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:16:19,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:16:19,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 22:16:19,368 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:16:19,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 22:16:19,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 22:16:19,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 22:16:19,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 22:16:19,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:16:19,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:16:19,708 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:16:19,709 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-07-20 22:16:19,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:16:19 BoogieIcfgContainer [2020-07-20 22:16:19,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:16:19,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:16:19,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:16:19,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:16:19,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:16:18" (1/3) ... [2020-07-20 22:16:19,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a161448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:16:19, skipping insertion in model container [2020-07-20 22:16:19,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:19" (2/3) ... [2020-07-20 22:16:19,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a161448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:16:19, skipping insertion in model container [2020-07-20 22:16:19,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:16:19" (3/3) ... [2020-07-20 22:16:19,731 INFO L109 eAbstractionObserver]: Analyzing ICFG string-2.i [2020-07-20 22:16:19,752 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:16:19,763 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:16:19,783 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:16:19,819 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:16:19,819 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:16:19,820 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:16:19,820 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:16:19,820 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:16:19,820 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:16:19,821 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:16:19,821 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:16:19,846 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-20 22:16:19,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 22:16:19,855 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:16:19,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:16:19,857 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:16:19,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:16:19,864 INFO L82 PathProgramCache]: Analyzing trace with hash -522531256, now seen corresponding path program 1 times [2020-07-20 22:16:19,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:16:19,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681783424] [2020-07-20 22:16:19,880 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 22:16:19,982 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:16:19,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:16:19,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 22:16:19,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:16:20,044 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 22:16:20,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:16:20,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681783424] [2020-07-20 22:16:20,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:16:20,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:16:20,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083912632] [2020-07-20 22:16:20,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:16:20,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:16:20,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:16:20,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:16:20,075 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-07-20 22:16:20,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:16:20,175 INFO L93 Difference]: Finished difference Result 73 states and 109 transitions. [2020-07-20 22:16:20,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:16:20,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 22:16:20,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:16:20,187 INFO L225 Difference]: With dead ends: 73 [2020-07-20 22:16:20,187 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 22:16:20,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 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 22:16:20,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 22:16:20,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-07-20 22:16:20,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 22:16:20,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-07-20 22:16:20,248 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 22 [2020-07-20 22:16:20,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:16:20,249 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-07-20 22:16:20,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:16:20,249 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-07-20 22:16:20,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 22:16:20,250 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:16:20,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:16:20,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:20,467 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:16:20,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:16:20,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1816798436, now seen corresponding path program 1 times [2020-07-20 22:16:20,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:16:20,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414151312] [2020-07-20 22:16:20,469 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 22:16:20,553 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:16:20,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:16:20,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:16:20,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:16:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 22:16:20,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:16:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 22:16:20,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414151312] [2020-07-20 22:16:20,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:16:20,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 22:16:20,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594644503] [2020-07-20 22:16:20,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:16:20,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:16:20,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:16:20,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:16:20,646 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2020-07-20 22:16:20,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:16:20,811 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2020-07-20 22:16:20,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:16:20,812 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-07-20 22:16:20,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:16:20,815 INFO L225 Difference]: With dead ends: 79 [2020-07-20 22:16:20,815 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 22:16:20,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:16:20,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 22:16:20,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2020-07-20 22:16:20,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 22:16:20,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-07-20 22:16:20,828 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 28 [2020-07-20 22:16:20,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:16:20,828 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-07-20 22:16:20,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:16:20,828 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-07-20 22:16:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 22:16:20,831 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:16:20,831 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:16:21,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:21,046 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:16:21,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:16:21,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1106103076, now seen corresponding path program 2 times [2020-07-20 22:16:21,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:16:21,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817116649] [2020-07-20 22:16:21,049 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 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:21,185 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:16:21,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:16:21,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:16:21,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:16:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 22:16:21,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:16:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 22:16:21,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817116649] [2020-07-20 22:16:21,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:16:21,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-20 22:16:21,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789961359] [2020-07-20 22:16:21,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 22:16:21,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:16:21,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 22:16:21,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:16:21,342 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 7 states. [2020-07-20 22:16:21,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:16:21,474 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2020-07-20 22:16:21,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 22:16:21,474 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-07-20 22:16:21,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:16:21,476 INFO L225 Difference]: With dead ends: 93 [2020-07-20 22:16:21,476 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 22:16:21,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:16:21,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 22:16:21,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-07-20 22:16:21,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 22:16:21,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-07-20 22:16:21,487 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2020-07-20 22:16:21,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:16:21,487 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-07-20 22:16:21,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 22:16:21,487 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-07-20 22:16:21,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-20 22:16:21,489 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:16:21,489 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:16:21,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:21,699 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:16:21,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:16:21,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1061537308, now seen corresponding path program 3 times [2020-07-20 22:16:21,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:16:21,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605493281] [2020-07-20 22:16:21,702 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 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:21,858 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:16:21,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 22:16:21,858 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 22:16:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 22:16:21,899 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 22:16:21,940 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 22:16:21,940 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 22:16:22,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:22,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:16:22 BoogieIcfgContainer [2020-07-20 22:16:22,201 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:16:22,205 INFO L168 Benchmark]: Toolchain (without parser) took 3453.27 ms. Allocated memory was 134.7 MB in the beginning and 225.4 MB in the end (delta: 90.7 MB). Free memory was 99.2 MB in the beginning and 156.5 MB in the end (delta: -57.2 MB). Peak memory consumption was 33.5 MB. Max. memory is 7.1 GB. [2020-07-20 22:16:22,206 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 134.7 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 22:16:22,207 INFO L168 Benchmark]: CACSL2BoogieTranslator took 359.34 ms. Allocated memory is still 134.7 MB. Free memory was 98.8 MB in the beginning and 88.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-20 22:16:22,208 INFO L168 Benchmark]: Boogie Preprocessor took 155.90 ms. Allocated memory was 134.7 MB in the beginning and 199.8 MB in the end (delta: 65.0 MB). Free memory was 88.1 MB in the beginning and 176.9 MB in the end (delta: -88.8 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-07-20 22:16:22,209 INFO L168 Benchmark]: RCFGBuilder took 444.60 ms. Allocated memory is still 199.8 MB. Free memory was 176.9 MB in the beginning and 157.0 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-07-20 22:16:22,210 INFO L168 Benchmark]: TraceAbstraction took 2480.59 ms. Allocated memory was 199.8 MB in the beginning and 225.4 MB in the end (delta: 25.7 MB). Free memory was 157.0 MB in the beginning and 156.5 MB in the end (delta: 559.1 kB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. [2020-07-20 22:16:22,215 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 134.7 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 359.34 ms. Allocated memory is still 134.7 MB. Free memory was 98.8 MB in the beginning and 88.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 155.90 ms. Allocated memory was 134.7 MB in the beginning and 199.8 MB in the end (delta: 65.0 MB). Free memory was 88.1 MB in the beginning and 176.9 MB in the end (delta: -88.8 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 444.60 ms. Allocated memory is still 199.8 MB. Free memory was 176.9 MB in the beginning and 157.0 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2480.59 ms. Allocated memory was 199.8 MB in the beginning and 225.4 MB in the end (delta: 25.7 MB). Free memory was 157.0 MB in the beginning and 156.5 MB in the end (delta: 559.1 kB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 9]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 58. Possible FailurePath: [L20] char string_A[5], string_B[5]; [L21] int i, j, nc_A, nc_B, found=0; [L24] i=0 VAL [found=0, i=0, string_A={2:0}, string_B={3:0}] [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ VAL [found=0, i=1, string_A={2:0}, string_B={3:0}] [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ VAL [found=0, i=2, string_A={2:0}, string_B={3:0}] [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ VAL [found=0, i=3, string_A={2:0}, string_B={3:0}] [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ VAL [found=0, i=4, string_A={2:0}, string_B={3:0}] [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ VAL [found=0, i=5, string_A={2:0}, string_B={3:0}] [L24] COND FALSE !(i<5) VAL [found=0, i=5, string_A={2:0}, string_B={3:0}] [L26] EXPR string_A[5 -1] VAL [found=0, i=5, string_A={2:0}, string_A[5 -1]=0, string_B={3:0}] [L26] COND FALSE !(!(string_A[5 -1]=='\0')) [L28] i=0 VAL [found=0, i=0, string_A={2:0}, string_B={3:0}] [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ VAL [found=0, i=1, string_A={2:0}, string_B={3:0}] [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ VAL [found=0, i=2, string_A={2:0}, string_B={3:0}] [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ VAL [found=0, i=3, string_A={2:0}, string_B={3:0}] [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ VAL [found=0, i=4, string_A={2:0}, string_B={3:0}] [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ VAL [found=0, i=5, string_A={2:0}, string_B={3:0}] [L28] COND FALSE !(i<5) VAL [found=0, i=5, string_A={2:0}, string_B={3:0}] [L30] EXPR string_B[5 -1] VAL [found=0, i=5, string_A={2:0}, string_B={3:0}, string_B[5 -1]=0] [L30] COND FALSE !(!(string_B[5 -1]=='\0')) [L32] nc_A = 0 VAL [found=0, i=5, nc_A=0, string_A={2:0}, string_B={3:0}] [L33] EXPR string_A[nc_A] VAL [found=0, i=5, nc_A=0, string_A={2:0}, string_A[nc_A]=0, string_B={3:0}] [L33] COND FALSE !(string_A[nc_A]!='\0') [L36] nc_B = 0 VAL [found=0, i=5, nc_A=0, nc_B=0, string_A={2:0}, string_B={3:0}] [L37] EXPR string_B[nc_B] VAL [found=0, i=5, nc_A=0, nc_B=0, string_A={2:0}, string_B={3:0}, string_B[nc_B]=0] [L37] COND FALSE !(string_B[nc_B]!='\0') [L40] COND FALSE !(!(nc_B >= nc_A)) [L43] EXPR j=0 [L43] i=j=0 VAL [found=0, i=0, j=0, nc_A=0, nc_B=0, string_A={2:0}, string_B={3:0}] [L44] COND FALSE !((inc_B-1)<