/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/test_cut_trace.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:30:39,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:30:39,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:30:39,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:30:39,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:30:39,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:30:39,661 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:30:39,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:30:39,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:30:39,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:30:39,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:30:39,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:30:39,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:30:39,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:30:39,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:30:39,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:30:39,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:30:39,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:30:39,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:30:39,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:30:39,679 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:30:39,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:30:39,682 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:30:39,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:30:39,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:30:39,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:30:39,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:30:39,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:30:39,696 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 11:30:39,712 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:30:39,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:30:39,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:30:39,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:30:39,714 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:30:39,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:30:39,714 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:30:39,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:30:39,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:30:39,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:30:39,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:30:39,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:30:39,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:30:39,715 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:30:39,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:30:39,716 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:30:39,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:30:39,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:30:39,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:30:39,717 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:30:39,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:30:39,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:30:39,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:30:39,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:30:39,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:30:39,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:30:39,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:30:39,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:30:39,718 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:30:39,719 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 11:30:39,996 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:30:40,009 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:30:40,012 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:30:40,014 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:30:40,014 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:30:40,015 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_cut_trace.i [2020-07-20 11:30:40,096 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a12d168a8/240cd1c6c02b4e25815a839fac113d5e/FLAGf115004e0 [2020-07-20 11:30:40,552 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:30:40,553 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_cut_trace.i [2020-07-20 11:30:40,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a12d168a8/240cd1c6c02b4e25815a839fac113d5e/FLAGf115004e0 [2020-07-20 11:30:40,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a12d168a8/240cd1c6c02b4e25815a839fac113d5e [2020-07-20 11:30:40,959 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:30:40,963 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:30:40,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:30:40,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:30:40,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:30:40,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:30:40" (1/1) ... [2020-07-20 11:30:40,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78559edb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:40, skipping insertion in model container [2020-07-20 11:30:40,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:30:40" (1/1) ... [2020-07-20 11:30:40,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:30:41,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:30:41,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:30:41,166 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:30:41,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:30:41,191 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:30:41,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:41 WrapperNode [2020-07-20 11:30:41,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:30:41,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:30:41,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:30:41,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:30:41,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:41" (1/1) ... [2020-07-20 11:30:41,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:41" (1/1) ... [2020-07-20 11:30:41,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:41" (1/1) ... [2020-07-20 11:30:41,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:41" (1/1) ... [2020-07-20 11:30:41,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:41" (1/1) ... [2020-07-20 11:30:41,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:41" (1/1) ... [2020-07-20 11:30:41,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:41" (1/1) ... [2020-07-20 11:30:41,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:30:41,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:30:41,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:30:41,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:30:41,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:41" (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 11:30:41,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:30:41,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:30:41,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-07-20 11:30:41,360 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:30:41,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:30:41,361 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-07-20 11:30:41,361 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:30:41,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:30:41,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:30:41,495 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:30:41,495 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 11:30:41,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:30:41 BoogieIcfgContainer [2020-07-20 11:30:41,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:30:41,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:30:41,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:30:41,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:30:41,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:30:40" (1/3) ... [2020-07-20 11:30:41,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dbe4333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:30:41, skipping insertion in model container [2020-07-20 11:30:41,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:41" (2/3) ... [2020-07-20 11:30:41,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dbe4333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:30:41, skipping insertion in model container [2020-07-20 11:30:41,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:30:41" (3/3) ... [2020-07-20 11:30:41,507 INFO L109 eAbstractionObserver]: Analyzing ICFG test_cut_trace.i [2020-07-20 11:30:41,515 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:30:41,521 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:30:41,535 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:30:41,560 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:30:41,560 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:30:41,560 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:30:41,560 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:30:41,561 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:30:41,561 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:30:41,561 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:30:41,561 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:30:41,577 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-20 11:30:41,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-20 11:30:41,582 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:30:41,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:30:41,584 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:30:41,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:30:41,589 INFO L82 PathProgramCache]: Analyzing trace with hash -417355086, now seen corresponding path program 1 times [2020-07-20 11:30:41,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:30:41,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008165363] [2020-07-20 11:30:41,597 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 11:30:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:30:41,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:30:41,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:30:41,702 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 11:30:41,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:30:41,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008165363] [2020-07-20 11:30:41,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:30:41,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:30:41,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717421946] [2020-07-20 11:30:41,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:30:41,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:30:41,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:30:41,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:30:41,728 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-07-20 11:30:41,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:30:41,767 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-07-20 11:30:41,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:30:41,772 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-20 11:30:41,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:30:41,782 INFO L225 Difference]: With dead ends: 29 [2020-07-20 11:30:41,782 INFO L226 Difference]: Without dead ends: 11 [2020-07-20 11:30:41,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:30:41,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-07-20 11:30:41,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-07-20 11:30:41,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-07-20 11:30:41,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 10 transitions. [2020-07-20 11:30:41,826 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 10 transitions. Word has length 8 [2020-07-20 11:30:41,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:30:41,827 INFO L479 AbstractCegarLoop]: Abstraction has 11 states and 10 transitions. [2020-07-20 11:30:41,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:30:41,827 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 10 transitions. [2020-07-20 11:30:41,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 11:30:41,828 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:30:41,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:30:42,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:30:42,039 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:30:42,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:30:42,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1648524013, now seen corresponding path program 1 times [2020-07-20 11:30:42,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:30:42,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238534906] [2020-07-20 11:30:42,042 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 11:30:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:30:42,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:30:42,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:30:42,118 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 11:30:42,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:30:42,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238534906] [2020-07-20 11:30:42,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:30:42,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:30:42,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439552591] [2020-07-20 11:30:42,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:30:42,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:30:42,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:30:42,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:30:42,126 INFO L87 Difference]: Start difference. First operand 11 states and 10 transitions. Second operand 4 states. [2020-07-20 11:30:42,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:30:42,172 INFO L93 Difference]: Finished difference Result 11 states and 10 transitions. [2020-07-20 11:30:42,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:30:42,173 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-07-20 11:30:42,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:30:42,174 INFO L225 Difference]: With dead ends: 11 [2020-07-20 11:30:42,174 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:30:42,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:30:42,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:30:42,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:30:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:30:42,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:30:42,185 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-07-20 11:30:42,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:30:42,186 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:30:42,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:30:42,186 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:30:42,186 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:30:42,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:30:42,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:30:42,486 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 11:30:42,487 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:30:42,487 INFO L268 CegarLoopResult]: For program point __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2020-07-20 11:30:42,487 INFO L268 CegarLoopResult]: For program point __blast_assertEXIT(lines 4 7) no Hoare annotation was computed. [2020-07-20 11:30:42,488 INFO L268 CegarLoopResult]: For program point __blast_assertFINAL(lines 4 7) no Hoare annotation was computed. [2020-07-20 11:30:42,488 INFO L271 CegarLoopResult]: At program point __blast_assertENTRY(lines 4 7) the Hoare annotation is: true [2020-07-20 11:30:42,488 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:30:42,488 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:30:42,488 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:30:42,489 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:30:42,489 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 20) the Hoare annotation is: true [2020-07-20 11:30:42,489 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 20) no Hoare annotation was computed. [2020-07-20 11:30:42,492 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-07-20 11:30:42,493 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-20 11:30:42,493 INFO L264 CegarLoopResult]: At program point L18-2(line 18) the Hoare annotation is: false [2020-07-20 11:30:42,493 INFO L268 CegarLoopResult]: For program point L18-3(line 18) no Hoare annotation was computed. [2020-07-20 11:30:42,493 INFO L264 CegarLoopResult]: At program point L16-2(line 16) the Hoare annotation is: false [2020-07-20 11:30:42,494 INFO L268 CegarLoopResult]: For program point L16-3(line 16) no Hoare annotation was computed. [2020-07-20 11:30:42,494 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 20) no Hoare annotation was computed. [2020-07-20 11:30:42,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:30:42 BoogieIcfgContainer [2020-07-20 11:30:42,507 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:30:42,512 INFO L168 Benchmark]: Toolchain (without parser) took 1548.62 ms. Allocated memory was 136.3 MB in the beginning and 199.8 MB in the end (delta: 63.4 MB). Free memory was 100.0 MB in the beginning and 135.2 MB in the end (delta: -35.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:42,515 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 136.3 MB. Free memory was 118.1 MB in the beginning and 117.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 11:30:42,517 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.31 ms. Allocated memory is still 136.3 MB. Free memory was 99.6 MB in the beginning and 90.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:42,519 INFO L168 Benchmark]: Boogie Preprocessor took 96.75 ms. Allocated memory was 136.3 MB in the beginning and 199.8 MB in the end (delta: 63.4 MB). Free memory was 90.5 MB in the beginning and 179.0 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:42,529 INFO L168 Benchmark]: RCFGBuilder took 209.54 ms. Allocated memory is still 199.8 MB. Free memory was 179.0 MB in the beginning and 169.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:42,531 INFO L168 Benchmark]: TraceAbstraction took 1007.14 ms. Allocated memory is still 199.8 MB. Free memory was 168.5 MB in the beginning and 135.2 MB in the end (delta: 33.3 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:42,541 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 136.3 MB. Free memory was 118.1 MB in the beginning and 117.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 228.31 ms. Allocated memory is still 136.3 MB. Free memory was 99.6 MB in the beginning and 90.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 96.75 ms. Allocated memory was 136.3 MB in the beginning and 199.8 MB in the end (delta: 63.4 MB). Free memory was 90.5 MB in the beginning and 179.0 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 209.54 ms. Allocated memory is still 199.8 MB. Free memory was 179.0 MB in the beginning and 169.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1007.14 ms. Allocated memory is still 199.8 MB. Free memory was 168.5 MB in the beginning and 135.2 MB in the end (delta: 33.3 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 7 SDslu, 16 SDs, 0 SdLazy, 6 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 7 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 198 SizeOfPredicates, 1 NumberOfNonLiveVariables, 38 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...