/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 true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invariants/mod4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 20:27:10,515 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 20:27:10,579 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 20:27:10,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 20:27:10,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 20:27:10,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 20:27:10,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 20:27:10,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 20:27:10,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 20:27:10,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 20:27:10,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 20:27:10,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 20:27:10,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 20:27:10,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 20:27:10,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 20:27:10,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 20:27:10,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 20:27:10,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 20:27:10,633 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 [2020-08-18 20:27:10,673 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 20:27:10,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 20:27:10,675 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 20:27:10,675 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 20:27:10,675 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 20:27:10,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 20:27:10,676 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 20:27:10,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 20:27:10,676 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 20:27:10,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 20:27:10,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 20:27:10,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 20:27:10,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 20:27:10,678 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 20:27:10,678 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 20:27:10,678 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 20:27:10,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 20:27:10,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 20:27:10,679 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 20:27:10,679 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 20:27:10,679 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 20:27:10,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:27:10,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 20:27:10,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 20:27:10,680 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 20:27:10,680 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 20:27:10,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 20:27:10,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 20:27:10,681 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 20:27:10,681 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 -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; [2020-08-18 20:27:10,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 20:27:10,982 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 20:27:10,992 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 20:27:10,993 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 20:27:10,994 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 20:27:10,995 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/mod4.c [2020-08-18 20:27:11,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e7478505/bdb23e789fcf419988acd67116443a34/FLAG7489f460b [2020-08-18 20:27:11,431 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 20:27:11,432 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invariants/mod4.c [2020-08-18 20:27:11,438 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e7478505/bdb23e789fcf419988acd67116443a34/FLAG7489f460b [2020-08-18 20:27:11,799 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e7478505/bdb23e789fcf419988acd67116443a34 [2020-08-18 20:27:11,808 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 20:27:11,809 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 20:27:11,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 20:27:11,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 20:27:11,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 20:27:11,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:27:11" (1/1) ... [2020-08-18 20:27:11,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2088d45a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:27:11, skipping insertion in model container [2020-08-18 20:27:11,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:27:11" (1/1) ... [2020-08-18 20:27:11,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 20:27:11,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 20:27:12,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:27:12,029 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 20:27:12,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:27:12,052 INFO L208 MainTranslator]: Completed translation [2020-08-18 20:27:12,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:27:12 WrapperNode [2020-08-18 20:27:12,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 20:27:12,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 20:27:12,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 20:27:12,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 20:27:12,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:27:12" (1/1) ... [2020-08-18 20:27:12,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:27:12" (1/1) ... [2020-08-18 20:27:12,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:27:12" (1/1) ... [2020-08-18 20:27:12,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:27:12" (1/1) ... [2020-08-18 20:27:12,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:27:12" (1/1) ... [2020-08-18 20:27:12,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:27:12" (1/1) ... [2020-08-18 20:27:12,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:27:12" (1/1) ... [2020-08-18 20:27:12,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 20:27:12,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 20:27:12,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 20:27:12,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 20:27:12,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:27:12" (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 [2020-08-18 20:27:12,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 20:27:12,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 20:27:12,228 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 20:27:12,229 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 20:27:12,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 20:27:12,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 20:27:12,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 20:27:12,231 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 20:27:12,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 20:27:12,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 20:27:12,392 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 20:27:12,392 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 20:27:12,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:27:12 BoogieIcfgContainer [2020-08-18 20:27:12,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 20:27:12,397 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 20:27:12,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 20:27:12,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 20:27:12,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 08:27:11" (1/3) ... [2020-08-18 20:27:12,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2988ae5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:27:12, skipping insertion in model container [2020-08-18 20:27:12,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:27:12" (2/3) ... [2020-08-18 20:27:12,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2988ae5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:27:12, skipping insertion in model container [2020-08-18 20:27:12,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:27:12" (3/3) ... [2020-08-18 20:27:12,405 INFO L109 eAbstractionObserver]: Analyzing ICFG mod4.c [2020-08-18 20:27:12,417 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 20:27:12,428 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 20:27:12,442 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 20:27:12,467 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 20:27:12,468 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 20:27:12,468 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 20:27:12,468 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 20:27:12,468 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 20:27:12,468 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 20:27:12,468 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 20:27:12,469 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 20:27:12,487 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-18 20:27:12,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 20:27:12,493 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:27:12,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:27:12,495 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:27:12,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:27:12,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2020-08-18 20:27:12,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:27:12,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634550763] [2020-08-18 20:27:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:27:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:12,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:27:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:27:12,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634550763] [2020-08-18 20:27:12,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:27:12,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 20:27:12,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500477544] [2020-08-18 20:27:12,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 20:27:12,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:27:12,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 20:27:12,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 20:27:12,650 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-08-18 20:27:12,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:27:12,669 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-08-18 20:27:12,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 20:27:12,671 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-18 20:27:12,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:27:12,679 INFO L225 Difference]: With dead ends: 31 [2020-08-18 20:27:12,680 INFO L226 Difference]: Without dead ends: 12 [2020-08-18 20:27:12,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 20:27:12,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-08-18 20:27:12,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-08-18 20:27:12,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-08-18 20:27:12,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-08-18 20:27:12,721 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-08-18 20:27:12,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:27:12,721 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-08-18 20:27:12,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 20:27:12,722 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-08-18 20:27:12,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-18 20:27:12,722 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:27:12,723 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:27:12,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 20:27:12,723 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:27:12,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:27:12,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1890620952, now seen corresponding path program 1 times [2020-08-18 20:27:12,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:27:12,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742853917] [2020-08-18 20:27:12,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:27:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:16,695 WARN L193 SmtUtils]: Spent 3.85 s on a formula simplification. DAG size of input: 43 DAG size of output: 17 [2020-08-18 20:27:16,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:27:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:16,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:27:16,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742853917] [2020-08-18 20:27:16,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:27:16,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 20:27:16,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856649050] [2020-08-18 20:27:16,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 20:27:16,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:27:16,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 20:27:16,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 20:27:16,734 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2020-08-18 20:27:16,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:27:16,774 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2020-08-18 20:27:16,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 20:27:16,774 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-08-18 20:27:16,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:27:16,775 INFO L225 Difference]: With dead ends: 12 [2020-08-18 20:27:16,775 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 20:27:16,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:27:16,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 20:27:16,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 20:27:16,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 20:27:16,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 20:27:16,778 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2020-08-18 20:27:16,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:27:16,779 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 20:27:16,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 20:27:16,779 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 20:27:16,779 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 20:27:16,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 20:27:16,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 20:27:16,835 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 20:27:16,836 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 20:27:16,836 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 20:27:16,837 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 20:27:16,837 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 20:27:16,837 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 20:27:16,838 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 16) the Hoare annotation is: true [2020-08-18 20:27:16,840 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 16) no Hoare annotation was computed. [2020-08-18 20:27:16,840 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-08-18 20:27:16,840 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 9 16) no Hoare annotation was computed. [2020-08-18 20:27:16,841 INFO L268 CegarLoopResult]: For program point L11-1(lines 11 13) no Hoare annotation was computed. [2020-08-18 20:27:16,841 INFO L264 CegarLoopResult]: At program point L11-3(lines 11 13) the Hoare annotation is: (let ((.cse0 (div main_~x~0 4))) (and (< 0 (+ .cse0 1)) (<= main_~x~0 (+ (* 4 .cse0) (* 4294967296 (div (+ main_~x~0 (* .cse0 (- 4))) 4294967296)))))) [2020-08-18 20:27:16,841 INFO L264 CegarLoopResult]: At program point L11-4(lines 11 13) the Hoare annotation is: (let ((.cse0 (div main_~x~0 4))) (and (< 0 (+ .cse0 1)) (<= main_~x~0 (+ (* 4 .cse0) (* 4294967296 (div (+ main_~x~0 (* .cse0 (- 4))) 4294967296)))))) [2020-08-18 20:27:16,843 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-18 20:27:16,843 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-18 20:27:16,844 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-18 20:27:16,844 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-18 20:27:16,844 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-18 20:27:16,844 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-18 20:27:16,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 08:27:16 BoogieIcfgContainer [2020-08-18 20:27:16,871 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 20:27:16,875 INFO L168 Benchmark]: Toolchain (without parser) took 5063.60 ms. Allocated memory was 141.6 MB in the beginning and 205.5 MB in the end (delta: 64.0 MB). Free memory was 104.6 MB in the beginning and 133.5 MB in the end (delta: -28.8 MB). Peak memory consumption was 35.1 MB. Max. memory is 7.1 GB. [2020-08-18 20:27:16,877 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-18 20:27:16,879 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.36 ms. Allocated memory is still 141.6 MB. Free memory was 104.4 MB in the beginning and 95.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-18 20:27:16,880 INFO L168 Benchmark]: Boogie Preprocessor took 107.49 ms. Allocated memory was 141.6 MB in the beginning and 205.5 MB in the end (delta: 64.0 MB). Free memory was 95.1 MB in the beginning and 185.5 MB in the end (delta: -90.4 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-08-18 20:27:16,889 INFO L168 Benchmark]: RCFGBuilder took 234.38 ms. Allocated memory is still 205.5 MB. Free memory was 185.5 MB in the beginning and 173.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-18 20:27:16,892 INFO L168 Benchmark]: TraceAbstraction took 4473.67 ms. Allocated memory is still 205.5 MB. Free memory was 173.4 MB in the beginning and 133.5 MB in the end (delta: 39.9 MB). Peak memory consumption was 39.9 MB. Max. memory is 7.1 GB. [2020-08-18 20:27:16,901 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 243.36 ms. Allocated memory is still 141.6 MB. Free memory was 104.4 MB in the beginning and 95.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.49 ms. Allocated memory was 141.6 MB in the beginning and 205.5 MB in the end (delta: 64.0 MB). Free memory was 95.1 MB in the beginning and 185.5 MB in the end (delta: -90.4 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 234.38 ms. Allocated memory is still 205.5 MB. Free memory was 185.5 MB in the beginning and 173.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4473.67 ms. Allocated memory is still 205.5 MB. Free memory was 173.4 MB in the beginning and 133.5 MB in the end (delta: 39.9 MB). Peak memory consumption was 39.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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 < x / 4 + 1 && x <= 4 * (x / 4) + 4294967296 * ((x + x / 4 * -4) / 4294967296) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 1 SDslu, 20 SDs, 0 SdLazy, 5 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s 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, 8 PreInvPairs, 9 NumberOfFragments, 59 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 19 ConstructedInterpolants, 0 QuantifiedInterpolants, 1021 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 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...