/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test28-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:21:25,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:21:25,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:21:25,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:21:25,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:21:25,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:21:25,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:21:25,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:21:25,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:21:25,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:21:25,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:21:25,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:21:25,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:21:25,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:21:25,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:21:25,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:21:25,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:21:25,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:21:25,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:21:25,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:21:25,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:21:25,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:21:25,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:21:25,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:21:25,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:21:25,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:21:25,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:21:25,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:21:25,589 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 10:21:25,622 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:21:25,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:21:25,627 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:21:25,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:21:25,627 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:21:25,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:21:25,628 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:21:25,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:21:25,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:21:25,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:21:25,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:21:25,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:21:25,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:21:25,629 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:21:25,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:21:25,633 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:21:25,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:21:25,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:21:25,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:21:25,634 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:21:25,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:21:25,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:21:25,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:21:25,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:21:25,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:21:25,635 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:21:25,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:21:25,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:21:25,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:21:25,636 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-21 10:21:26,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:21:26,203 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:21:26,208 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:21:26,209 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:21:26,210 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:21:26,212 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-2.c [2020-09-21 10:21:26,307 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/59847038e/cc2f86829a4b4ab486bf14c31776eb2d/FLAGa95a27068 [2020-09-21 10:21:26,858 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:21:26,859 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test28-2.c [2020-09-21 10:21:26,867 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/59847038e/cc2f86829a4b4ab486bf14c31776eb2d/FLAGa95a27068 [2020-09-21 10:21:27,196 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/59847038e/cc2f86829a4b4ab486bf14c31776eb2d [2020-09-21 10:21:27,212 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:21:27,218 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:21:27,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:21:27,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:21:27,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:21:27,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20d022c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27, skipping insertion in model container [2020-09-21 10:21:27,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:21:27,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:21:27,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:21:27,503 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:21:27,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:21:27,537 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:21:27,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27 WrapperNode [2020-09-21 10:21:27,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:21:27,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:21:27,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:21:27,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:21:27,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,645 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:21:27,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:21:27,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:21:27,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:21:27,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-21 10:21:27,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:21:27,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:21:27,757 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:21:27,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:21:27,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:21:27,757 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:21:27,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:21:27,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:21:27,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:21:27,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:21:27,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:21:27,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:21:28,155 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:21:28,156 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 10:21:28,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:21:28 BoogieIcfgContainer [2020-09-21 10:21:28,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:21:28,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:21:28,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:21:28,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:21:28,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:21:27" (1/3) ... [2020-09-21 10:21:28,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@663db04e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:21:28, skipping insertion in model container [2020-09-21 10:21:28,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (2/3) ... [2020-09-21 10:21:28,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@663db04e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:21:28, skipping insertion in model container [2020-09-21 10:21:28,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:21:28" (3/3) ... [2020-09-21 10:21:28,171 INFO L109 eAbstractionObserver]: Analyzing ICFG test28-2.c [2020-09-21 10:21:28,182 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:21:28,192 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:21:28,215 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:21:28,242 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:21:28,242 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:21:28,242 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:21:28,243 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:21:28,243 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:21:28,243 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:21:28,243 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:21:28,243 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:21:28,264 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-09-21 10:21:28,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 10:21:28,271 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:28,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:28,273 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:28,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:28,281 INFO L82 PathProgramCache]: Analyzing trace with hash 668850033, now seen corresponding path program 1 times [2020-09-21 10:21:28,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:28,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884221015] [2020-09-21 10:21:28,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:28,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:28,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884221015] [2020-09-21 10:21:28,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:28,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:21:28,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625861370] [2020-09-21 10:21:28,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:21:28,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:28,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:21:28,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:21:28,622 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-09-21 10:21:28,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:28,743 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-09-21 10:21:28,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:21:28,746 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-21 10:21:28,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:28,759 INFO L225 Difference]: With dead ends: 34 [2020-09-21 10:21:28,759 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 10:21:28,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:21:28,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 10:21:28,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2020-09-21 10:21:28,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-21 10:21:28,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-09-21 10:21:28,806 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2020-09-21 10:21:28,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:28,806 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-09-21 10:21:28,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:21:28,807 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-09-21 10:21:28,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 10:21:28,807 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:28,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:28,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:21:28,809 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:28,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:28,810 INFO L82 PathProgramCache]: Analyzing trace with hash 667002991, now seen corresponding path program 1 times [2020-09-21 10:21:28,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:28,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754053143] [2020-09-21 10:21:28,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:28,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:28,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754053143] [2020-09-21 10:21:28,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:28,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:21:28,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672281931] [2020-09-21 10:21:28,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:21:28,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:28,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:21:28,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:21:28,938 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2020-09-21 10:21:29,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:29,059 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-09-21 10:21:29,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:21:29,060 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-09-21 10:21:29,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:29,061 INFO L225 Difference]: With dead ends: 23 [2020-09-21 10:21:29,061 INFO L226 Difference]: Without dead ends: 14 [2020-09-21 10:21:29,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:21:29,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-09-21 10:21:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-09-21 10:21:29,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-09-21 10:21:29,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2020-09-21 10:21:29,068 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 13 [2020-09-21 10:21:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:29,068 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2020-09-21 10:21:29,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:21:29,069 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2020-09-21 10:21:29,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 10:21:29,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:29,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:29,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:21:29,070 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:29,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:29,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1851109901, now seen corresponding path program 1 times [2020-09-21 10:21:29,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:29,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519546177] [2020-09-21 10:21:29,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:29,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:29,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:29,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519546177] [2020-09-21 10:21:29,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:29,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 10:21:29,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823295934] [2020-09-21 10:21:29,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:21:29,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:29,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:21:29,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:21:29,239 INFO L87 Difference]: Start difference. First operand 14 states and 13 transitions. Second operand 8 states. [2020-09-21 10:21:29,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:29,340 INFO L93 Difference]: Finished difference Result 14 states and 13 transitions. [2020-09-21 10:21:29,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:21:29,341 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-09-21 10:21:29,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:29,342 INFO L225 Difference]: With dead ends: 14 [2020-09-21 10:21:29,342 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 10:21:29,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:21:29,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 10:21:29,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 10:21:29,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 10:21:29,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 10:21:29,344 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2020-09-21 10:21:29,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:29,357 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 10:21:29,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:21:29,358 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 10:21:29,358 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 10:21:29,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:21:29,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 10:21:29,401 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-21 10:21:29,402 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-09-21 10:21:29,402 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:21:29,402 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:21:29,402 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 10:21:29,403 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 10:21:29,403 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 10:21:29,403 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 28) no Hoare annotation was computed. [2020-09-21 10:21:29,403 INFO L264 CegarLoopResult]: At program point L21(lines 11 28) the Hoare annotation is: false [2020-09-21 10:21:29,403 INFO L268 CegarLoopResult]: For program point L15(lines 15 19) no Hoare annotation was computed. [2020-09-21 10:21:29,403 INFO L268 CegarLoopResult]: For program point L15-2(lines 15 19) no Hoare annotation was computed. [2020-09-21 10:21:29,404 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 28) no Hoare annotation was computed. [2020-09-21 10:21:29,404 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 26) no Hoare annotation was computed. [2020-09-21 10:21:29,404 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 10 28) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-09-21 10:21:29,404 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-21 10:21:29,404 INFO L268 CegarLoopResult]: For program point L20-2(lines 20 22) no Hoare annotation was computed. [2020-09-21 10:21:29,405 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-21 10:21:29,405 INFO L268 CegarLoopResult]: For program point L14-2(line 14) no Hoare annotation was computed. [2020-09-21 10:21:29,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:21:29 BoogieIcfgContainer [2020-09-21 10:21:29,419 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:21:29,423 INFO L168 Benchmark]: Toolchain (without parser) took 2207.86 ms. Allocated memory was 140.0 MB in the beginning and 236.5 MB in the end (delta: 96.5 MB). Free memory was 103.4 MB in the beginning and 202.4 MB in the end (delta: -99.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:21:29,424 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:21:29,425 INFO L168 Benchmark]: CACSL2BoogieTranslator took 319.08 ms. Allocated memory is still 140.0 MB. Free memory was 102.7 MB in the beginning and 93.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:29,426 INFO L168 Benchmark]: Boogie Preprocessor took 138.55 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.0 MB in the beginning and 180.9 MB in the end (delta: -87.9 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:29,427 INFO L168 Benchmark]: RCFGBuilder took 483.14 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 167.0 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:29,428 INFO L168 Benchmark]: TraceAbstraction took 1257.31 ms. Allocated memory was 202.9 MB in the beginning and 236.5 MB in the end (delta: 33.6 MB). Free memory was 166.3 MB in the beginning and 202.4 MB in the end (delta: -36.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:21:29,431 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 319.08 ms. Allocated memory is still 140.0 MB. Free memory was 102.7 MB in the beginning and 93.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.55 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.0 MB in the beginning and 180.9 MB in the end (delta: -87.9 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 483.14 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 167.0 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1257.31 ms. Allocated memory was 202.9 MB in the beginning and 236.5 MB in the end (delta: 33.6 MB). Free memory was 166.3 MB in the beginning and 202.4 MB in the end (delta: -36.0 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 26]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 24 SDtfs, 30 SDslu, 69 SDs, 0 SdLazy, 118 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred 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, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 16 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 7 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1464 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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...