/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=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invariants/eq1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:02:16,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:02:16,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:02:16,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:02:16,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:02:16,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:02:16,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:02:16,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:02:16,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:02:16,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:02:16,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:02:16,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:02:16,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:02:16,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:02:16,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:02:16,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:02:16,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:02:16,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:02:16,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:02:16,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:02:16,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:02:16,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:02:16,747 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:02:16,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:02:16,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 18:02:16,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:02:16,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:02:16,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:02:16,779 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 18:02:16,821 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:02:16,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:02:16,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:02:16,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:02:16,823 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:02:16,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:02:16,823 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:02:16,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:02:16,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:02:16,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:02:16,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:02:16,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:02:16,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:02:16,826 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:02:16,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:02:16,827 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:02:16,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:02:16,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:02:16,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:02:16,828 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:02:16,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:02:16,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:02:16,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:02:16,829 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:02:16,829 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:02:16,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:02:16,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:02:16,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:02:16,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:02:16,830 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=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 18:02:17,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:02:17,161 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:02:17,166 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:02:17,168 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:02:17,168 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:02:17,169 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/eq1.c [2020-08-18 18:02:17,245 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fc39f159b/34966ee741714dbea20d5f2507f9549f/FLAG342c7c297 [2020-08-18 18:02:17,665 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:02:17,666 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invariants/eq1.c [2020-08-18 18:02:17,672 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fc39f159b/34966ee741714dbea20d5f2507f9549f/FLAG342c7c297 [2020-08-18 18:02:18,059 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fc39f159b/34966ee741714dbea20d5f2507f9549f [2020-08-18 18:02:18,067 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:02:18,068 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:02:18,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:02:18,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:02:18,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:02:18,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:02:18" (1/1) ... [2020-08-18 18:02:18,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@678b2c62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:18, skipping insertion in model container [2020-08-18 18:02:18,078 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:02:18" (1/1) ... [2020-08-18 18:02:18,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:02:18,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:02:18,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:02:18,274 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:02:18,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:02:18,299 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:02:18,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:18 WrapperNode [2020-08-18 18:02:18,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:02:18,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:02:18,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:02:18,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:02:18,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:18" (1/1) ... [2020-08-18 18:02:18,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:18" (1/1) ... [2020-08-18 18:02:18,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:18" (1/1) ... [2020-08-18 18:02:18,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:18" (1/1) ... [2020-08-18 18:02:18,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:18" (1/1) ... [2020-08-18 18:02:18,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:18" (1/1) ... [2020-08-18 18:02:18,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:18" (1/1) ... [2020-08-18 18:02:18,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:02:18,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:02:18,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:02:18,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:02:18,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:18" (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 18:02:18,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:02:18,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:02:18,463 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 18:02:18,463 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:02:18,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:02:18,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 18:02:18,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 18:02:18,465 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:02:18,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:02:18,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:02:18,640 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:02:18,640 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 18:02:18,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:02:18 BoogieIcfgContainer [2020-08-18 18:02:18,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:02:18,645 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:02:18,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:02:18,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:02:18,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:02:18" (1/3) ... [2020-08-18 18:02:18,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73795d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:02:18, skipping insertion in model container [2020-08-18 18:02:18,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:18" (2/3) ... [2020-08-18 18:02:18,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73795d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:02:18, skipping insertion in model container [2020-08-18 18:02:18,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:02:18" (3/3) ... [2020-08-18 18:02:18,652 INFO L109 eAbstractionObserver]: Analyzing ICFG eq1.c [2020-08-18 18:02:18,665 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:02:18,672 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:02:18,687 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:02:18,725 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:02:18,726 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:02:18,726 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:02:18,726 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:02:18,726 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:02:18,726 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:02:18,727 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:02:18,727 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:02:18,775 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-18 18:02:18,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 18:02:18,781 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:18,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:02:18,782 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:18,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:18,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1712329921, now seen corresponding path program 1 times [2020-08-18 18:02:18,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:18,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327013900] [2020-08-18 18:02:18,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:18,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:18,916 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 18:02:18,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327013900] [2020-08-18 18:02:18,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:18,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 18:02:18,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161708050] [2020-08-18 18:02:18,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 18:02:18,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:18,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 18:02:18,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 18:02:18,938 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-08-18 18:02:18,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:18,958 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-08-18 18:02:18,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 18:02:18,959 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-18 18:02:18,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:18,966 INFO L225 Difference]: With dead ends: 31 [2020-08-18 18:02:18,966 INFO L226 Difference]: Without dead ends: 12 [2020-08-18 18:02:18,969 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 18:02:18,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-08-18 18:02:18,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-08-18 18:02:18,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-08-18 18:02:18,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-08-18 18:02:19,000 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2020-08-18 18:02:19,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:19,001 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-08-18 18:02:19,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 18:02:19,001 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-08-18 18:02:19,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 18:02:19,002 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:19,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:02:19,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:02:19,003 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:19,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:19,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1703094711, now seen corresponding path program 1 times [2020-08-18 18:02:19,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:19,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716191327] [2020-08-18 18:02:19,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:19,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:19,186 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 18:02:19,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716191327] [2020-08-18 18:02:19,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:19,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:02:19,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270413299] [2020-08-18 18:02:19,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:02:19,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:19,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:02:19,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:02:19,191 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2020-08-18 18:02:19,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:19,231 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-08-18 18:02:19,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:02:19,231 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-18 18:02:19,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:19,232 INFO L225 Difference]: With dead ends: 12 [2020-08-18 18:02:19,232 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 18:02:19,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:02:19,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 18:02:19,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 18:02:19,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 18:02:19,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 18:02:19,235 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-08-18 18:02:19,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:19,236 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 18:02:19,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:02:19,236 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 18:02:19,236 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 18:02:19,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:02:19,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 18:02:19,280 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 18:02:19,280 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:02:19,281 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:02:19,281 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 18:02:19,281 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 18:02:19,281 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 18:02:19,282 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 23) the Hoare annotation is: true [2020-08-18 18:02:19,282 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 23) no Hoare annotation was computed. [2020-08-18 18:02:19,283 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-08-18 18:02:19,283 INFO L268 CegarLoopResult]: For program point L15(lines 15 19) no Hoare annotation was computed. [2020-08-18 18:02:19,283 INFO L264 CegarLoopResult]: At program point L15-2(lines 14 20) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-08-18 18:02:19,284 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 9 23) no Hoare annotation was computed. [2020-08-18 18:02:19,284 INFO L264 CegarLoopResult]: At program point L14-2(lines 14 20) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-08-18 18:02:19,284 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-18 18:02:19,284 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-18 18:02:19,284 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-18 18:02:19,285 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-18 18:02:19,285 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-18 18:02:19,285 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-18 18:02:19,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:02:19 BoogieIcfgContainer [2020-08-18 18:02:19,303 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:02:19,306 INFO L168 Benchmark]: Toolchain (without parser) took 1236.29 ms. Allocated memory was 139.5 MB in the beginning and 200.8 MB in the end (delta: 61.3 MB). Free memory was 102.8 MB in the beginning and 131.7 MB in the end (delta: -28.9 MB). Peak memory consumption was 32.4 MB. Max. memory is 7.1 GB. [2020-08-18 18:02:19,307 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 18:02:19,308 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.04 ms. Allocated memory is still 139.5 MB. Free memory was 102.5 MB in the beginning and 93.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-18 18:02:19,309 INFO L168 Benchmark]: Boogie Preprocessor took 100.60 ms. Allocated memory was 139.5 MB in the beginning and 200.8 MB in the end (delta: 61.3 MB). Free memory was 93.2 MB in the beginning and 179.9 MB in the end (delta: -86.7 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-18 18:02:19,310 INFO L168 Benchmark]: RCFGBuilder took 242.83 ms. Allocated memory is still 200.8 MB. Free memory was 179.2 MB in the beginning and 167.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-08-18 18:02:19,311 INFO L168 Benchmark]: TraceAbstraction took 657.40 ms. Allocated memory is still 200.8 MB. Free memory was 167.2 MB in the beginning and 131.7 MB in the end (delta: 35.5 MB). Peak memory consumption was 35.5 MB. Max. memory is 7.1 GB. [2020-08-18 18:02:19,315 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 231.04 ms. Allocated memory is still 139.5 MB. Free memory was 102.5 MB in the beginning and 93.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 100.60 ms. Allocated memory was 139.5 MB in the beginning and 200.8 MB in the end (delta: 61.3 MB). Free memory was 93.2 MB in the beginning and 179.9 MB in the end (delta: -86.7 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 242.83 ms. Allocated memory is still 200.8 MB. Free memory was 179.2 MB in the beginning and 167.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 657.40 ms. Allocated memory is still 200.8 MB. Free memory was 167.2 MB in the beginning and 131.7 MB in the end (delta: 35.5 MB). Peak memory consumption was 35.5 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: 14]: Loop Invariant Derived loop invariant: x == w && z == y - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 2 SDslu, 20 SDs, 0 SdLazy, 8 SolverSat, 2 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, 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, 8 PreInvPairs, 9 NumberOfFragments, 19 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 324 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...