/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test22-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:30:20,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:30:20,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:30:20,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:30:20,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:30:20,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:30:20,597 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:30:20,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:30:20,611 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:30:20,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:30:20,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:30:20,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:30:20,617 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:30:20,619 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:30:20,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:30:20,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:30:20,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:30:20,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:30:20,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:30:20,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:30:20,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:30:20,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:30:20,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:30:20,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:30:20,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:30:20,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:30:20,656 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:30:20,657 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:30:20,658 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 11:30:20,695 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:30:20,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:30:20,696 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:30:20,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:30:20,697 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:30:20,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:30:20,697 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:30:20,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:30:20,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:30:20,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:30:20,698 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:30:20,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:30:20,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:30:20,699 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:30:20,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:30:20,699 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:30:20,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:30:20,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:30:20,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:30:20,700 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:30:20,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:30:20,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:30:20,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:30:20,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:30:20,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:30:20,701 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:30:20,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:30:20,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:30:20,702 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:30:20,702 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 -> NOT_INCREMENTALLY [2020-07-20 11:30:20,966 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:30:20,978 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:30:20,982 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:30:20,983 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:30:20,983 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:30:20,984 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test22-2.c [2020-07-20 11:30:21,046 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7ab0b896/d270115046ab4a82917ca51c4ab0ddbd/FLAGd126728db [2020-07-20 11:30:21,510 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:30:21,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test22-2.c [2020-07-20 11:30:21,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7ab0b896/d270115046ab4a82917ca51c4ab0ddbd/FLAGd126728db [2020-07-20 11:30:21,902 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7ab0b896/d270115046ab4a82917ca51c4ab0ddbd [2020-07-20 11:30:21,910 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:30:21,913 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:30:21,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:30:21,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:30:21,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:30:21,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:30:21" (1/1) ... [2020-07-20 11:30:21,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26d5ca3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:21, skipping insertion in model container [2020-07-20 11:30:21,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:30:21" (1/1) ... [2020-07-20 11:30:21,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:30:21,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:30:22,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:30:22,160 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:30:22,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:30:22,284 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:30:22,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:22 WrapperNode [2020-07-20 11:30:22,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:30:22,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:30:22,285 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:30:22,285 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:30:22,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:22" (1/1) ... [2020-07-20 11:30:22,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:22" (1/1) ... [2020-07-20 11:30:22,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:22" (1/1) ... [2020-07-20 11:30:22,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:22" (1/1) ... [2020-07-20 11:30:22,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:22" (1/1) ... [2020-07-20 11:30:22,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:22" (1/1) ... [2020-07-20 11:30:22,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:22" (1/1) ... [2020-07-20 11:30:22,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:30:22,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:30:22,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:30:22,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:30:22,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:22" (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 11:30:22,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:30:22,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:30:22,398 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-07-20 11:30:22,399 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2020-07-20 11:30:22,399 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-07-20 11:30:22,399 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:30:22,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:30:22,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:30:22,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 11:30:22,400 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 11:30:22,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:30:22,401 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2020-07-20 11:30:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 11:30:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:30:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:30:22,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:30:22,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:30:22,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-20 11:30:22,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:30:22,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:30:22,669 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:30:22,669 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 11:30:22,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:30:22 BoogieIcfgContainer [2020-07-20 11:30:22,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:30:22,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:30:22,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:30:22,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:30:22,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:30:21" (1/3) ... [2020-07-20 11:30:22,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bec7a13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:30:22, skipping insertion in model container [2020-07-20 11:30:22,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:22" (2/3) ... [2020-07-20 11:30:22,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bec7a13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:30:22, skipping insertion in model container [2020-07-20 11:30:22,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:30:22" (3/3) ... [2020-07-20 11:30:22,682 INFO L109 eAbstractionObserver]: Analyzing ICFG test22-2.c [2020-07-20 11:30:22,699 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:30:22,707 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:30:22,724 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:30:22,756 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:30:22,756 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:30:22,756 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:30:22,756 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:30:22,757 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:30:22,757 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:30:22,757 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:30:22,757 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:30:22,778 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-20 11:30:22,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 11:30:22,786 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:30:22,787 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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 11:30:22,787 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:30:22,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:30:22,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1345538594, now seen corresponding path program 1 times [2020-07-20 11:30:22,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:30:22,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524567012] [2020-07-20 11:30:22,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 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 11:30:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:30:22,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:30:22,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:30:22,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 11:30:22,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:30:22,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524567012] [2020-07-20 11:30:22,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:30:22,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:30:22,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834152716] [2020-07-20 11:30:22,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:30:22,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:30:23,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:30:23,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:30:23,014 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2020-07-20 11:30:23,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:30:23,038 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-07-20 11:30:23,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:30:23,039 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-07-20 11:30:23,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:30:23,048 INFO L225 Difference]: With dead ends: 49 [2020-07-20 11:30:23,049 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 11:30:23,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:30:23,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 11:30:23,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-20 11:30:23,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 11:30:23,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-20 11:30:23,097 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2020-07-20 11:30:23,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:30:23,099 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-20 11:30:23,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:30:23,100 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-20 11:30:23,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 11:30:23,102 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:30:23,103 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1] [2020-07-20 11:30:23,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:30:23,319 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:30:23,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:30:23,321 INFO L82 PathProgramCache]: Analyzing trace with hash -213153012, now seen corresponding path program 1 times [2020-07-20 11:30:23,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:30:23,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867613688] [2020-07-20 11:30:23,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 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 11:30:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:30:23,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-20 11:30:23,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:30:23,724 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:30:23,821 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2020-07-20 11:30:23,824 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:30:23,832 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:30:23,833 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:30:23,833 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2020-07-20 11:30:23,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 11:30:23,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:30:23,936 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:30:23,937 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2020-07-20 11:30:23,940 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:30:23,941 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 11:30:23,947 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:30:23,947 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-20 11:30:23,948 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:7 [2020-07-20 11:30:23,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:30:24,091 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[3, 2, 2, 1] term [2020-07-20 11:30:24,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 11:30:24,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 11:30:24,269 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 11:30:24,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:30:24,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:30:24,275 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:30:24,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 11:30:24,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867613688] [2020-07-20 11:30:24,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:30:24,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2020-07-20 11:30:24,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836508576] [2020-07-20 11:30:24,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-20 11:30:24,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:30:24,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-20 11:30:24,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2020-07-20 11:30:24,483 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 31 states. [2020-07-20 11:30:25,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:30:25,984 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2020-07-20 11:30:25,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 11:30:25,985 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2020-07-20 11:30:25,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:30:25,990 INFO L225 Difference]: With dead ends: 116 [2020-07-20 11:30:25,990 INFO L226 Difference]: Without dead ends: 108 [2020-07-20 11:30:25,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=415, Invalid=2135, Unknown=0, NotChecked=0, Total=2550 [2020-07-20 11:30:25,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-20 11:30:26,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 50. [2020-07-20 11:30:26,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 11:30:26,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2020-07-20 11:30:26,012 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 38 [2020-07-20 11:30:26,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:30:26,012 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2020-07-20 11:30:26,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-20 11:30:26,013 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2020-07-20 11:30:26,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 11:30:26,015 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:30:26,015 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1] [2020-07-20 11:30:26,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:30:26,230 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:30:26,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:30:26,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1234221366, now seen corresponding path program 1 times [2020-07-20 11:30:26,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:30:26,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824739889] [2020-07-20 11:30:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 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 11:30:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:30:26,297 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:30:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:30:26,318 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:30:26,369 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:30:26,369 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:30:26,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:30:26,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:30:26 BoogieIcfgContainer [2020-07-20 11:30:26,635 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:30:26,637 INFO L168 Benchmark]: Toolchain (without parser) took 4725.38 ms. Allocated memory was 139.5 MB in the beginning and 247.5 MB in the end (delta: 108.0 MB). Free memory was 103.3 MB in the beginning and 136.2 MB in the end (delta: -32.8 MB). Peak memory consumption was 75.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:26,638 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 11:30:26,639 INFO L168 Benchmark]: CACSL2BoogieTranslator took 370.71 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 102.9 MB in the beginning and 182.6 MB in the end (delta: -79.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:26,640 INFO L168 Benchmark]: Boogie Preprocessor took 38.97 ms. Allocated memory is still 203.9 MB. Free memory was 182.6 MB in the beginning and 180.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:26,641 INFO L168 Benchmark]: RCFGBuilder took 348.95 ms. Allocated memory is still 203.9 MB. Free memory was 180.3 MB in the beginning and 161.8 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:26,642 INFO L168 Benchmark]: TraceAbstraction took 3960.26 ms. Allocated memory was 203.9 MB in the beginning and 247.5 MB in the end (delta: 43.5 MB). Free memory was 161.1 MB in the beginning and 136.2 MB in the end (delta: 24.9 MB). Peak memory consumption was 68.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:26,646 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 370.71 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 102.9 MB in the beginning and 182.6 MB in the end (delta: -79.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 38.97 ms. Allocated memory is still 203.9 MB. Free memory was 182.6 MB in the beginning and 180.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 348.95 ms. Allocated memory is still 203.9 MB. Free memory was 180.3 MB in the beginning and 161.8 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3960.26 ms. Allocated memory was 203.9 MB in the beginning and 247.5 MB in the end (delta: 43.5 MB). Free memory was 161.1 MB in the beginning and 136.2 MB in the end (delta: 24.9 MB). Peak memory consumption was 68.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 48]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L9] struct dummy d1, d2; VAL [\old(d1)=9, \old(d1)=6, \old(d2)=7, \old(d2)=11, d1={3:0}, d2={2:0}] [L32] CALL init() VAL [d1={3:0}, d2={2:0}] [L13] d1.a = __VERIFIER_nondet_int() [L14] d1.b = __VERIFIER_nondet_int() [L16] d2.a = __VERIFIER_nondet_int() [L17] d2.b = __VERIFIER_nondet_int() [L32] RET init() VAL [d1={3:0}, d2={2:0}] [L33] CALL, EXPR get_dummy() VAL [d1={3:0}, d2={2:0}] [L22] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [__VERIFIER_nondet_bool()=-1, __VERIFIER_nondet_bool() ? &d1 : &d2={3:0}, d1={3:0}, d2={2:0}] [L22] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L33] RET, EXPR get_dummy() VAL [d1={3:0}, d2={2:0}, get_dummy()={3:0}] [L33] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L33] CALL, EXPR get_dummy() VAL [d1={3:0}, d2={2:0}] [L22] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [__VERIFIER_nondet_bool()=-255, __VERIFIER_nondet_bool() ? &d1 : &d2={3:0}, d1={3:0}, d2={2:0}] [L22] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L33] RET, EXPR get_dummy() VAL [d1={3:0}, d2={2:0}, get_dummy()={3:0}, pd1={3:0}] [L33] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L33] CALL, EXPR get_dummy() VAL [d1={3:0}, d2={2:0}] [L22] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [__VERIFIER_nondet_bool()=-256, __VERIFIER_nondet_bool() ? &d1 : &d2={2:0}, d1={3:0}, d2={2:0}] [L22] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L33] RET, EXPR get_dummy() VAL [d1={3:0}, d2={2:0}, get_dummy()={2:0}, pd1={3:0}, pd2={3:0}] [L33] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L34] int i = __VERIFIER_nondet_int(); [L35] pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 [L35] EXPR (*pd2).a [L35] pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 VAL [(*pd2).a=5854, d1={3:0}, d2={2:0}, i=0, pd1={3:0}, pd1 != 0 && pd1 == pd2 && (*pd2).a > 0=1, pd2={3:0}, pd3={2:0}] [L35] COND TRUE pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 [L36] int *pa = &pd1->a; [L37] EXPR pd3->a [L37] i = pd3->a - 10 [L38] EXPR \read(*pa) VAL [\read(*pa)=5854, d1={3:0}, d2={2:0}, i=5855, pa={3:0}, pd1={3:0}, pd2={3:0}, pd3={2:0}] [L38] COND FALSE !(i < *pa) [L41] CALL, EXPR check(pd2, i) VAL [\old(i)=5855, d1={3:0}, d2={2:0}, s1={3:0}] [L27] EXPR s1->a [L27] return s1->a == i; [L41] RET, EXPR check(pd2, i) VAL [check(pd2, i)=0, d1={3:0}, d2={2:0}, i=5855, pa={3:0}, pd1={3:0}, pd2={3:0}, pd3={2:0}] [L41] COND TRUE !check(pd2, i) [L48] __VERIFIER_error() VAL [d1={3:0}, d2={2:0}, i=5855, pa={3:0}, pd1={3:0}, pd2={3:0}, pd3={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.8s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 86 SDtfs, 147 SDslu, 612 SDs, 0 SdLazy, 581 SolverSat, 75 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 131 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=2, 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, 58 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 110 ConstructedInterpolants, 0 QuantifiedInterpolants, 19056 SizeOfPredicates, 16 NumberOfNonLiveVariables, 364 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 24/36 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 incorrect! Received shutdown request...