/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/loopv1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 02:54:58,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 02:54:58,677 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 02:54:58,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 02:54:58,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 02:54:58,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 02:54:58,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 02:54:58,731 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 02:54:58,733 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 02:54:58,735 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 02:54:58,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 02:54:58,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 02:54:58,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 02:54:58,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 02:54:58,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 02:54:58,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 02:54:58,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 02:54:58,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 02:54:58,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 02:54:58,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 02:54:58,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 02:54:58,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 02:54:58,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 02:54:58,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 02:54:58,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 02:54:58,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 02:54:58,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 02:54:58,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 02:54:58,795 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 [2020-08-19 02:54:58,835 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:54:58,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:54:58,837 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:54:58,837 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:54:58,837 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:54:58,837 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:54:58,838 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:54:58,838 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:54:58,838 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:54:58,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:54:58,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:54:58,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:54:58,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:54:58,840 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:54:58,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:54:58,841 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:54:58,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:54:58,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:54:58,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:54:58,842 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:54:58,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:54:58,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:54:58,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:54:58,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:54:58,843 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:54:58,844 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:54:58,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:54:58,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:54:58,844 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:54:58,844 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=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; [2020-08-19 02:54:59,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:54:59,163 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:54:59,167 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:54:59,168 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:54:59,169 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:54:59,169 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv1.c [2020-08-19 02:54:59,246 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42fcb121f/77693a2f49c94a0eae7a4864e045b8f4/FLAG2382ff828 [2020-08-19 02:54:59,676 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:54:59,676 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/loopv1.c [2020-08-19 02:54:59,682 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42fcb121f/77693a2f49c94a0eae7a4864e045b8f4/FLAG2382ff828 [2020-08-19 02:55:00,069 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42fcb121f/77693a2f49c94a0eae7a4864e045b8f4 [2020-08-19 02:55:00,079 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:55:00,081 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:55:00,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:55:00,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:55:00,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:55:00,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:55:00" (1/1) ... [2020-08-19 02:55:00,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78532141 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:55:00, skipping insertion in model container [2020-08-19 02:55:00,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:55:00" (1/1) ... [2020-08-19 02:55:00,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:55:00,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:55:00,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:55:00,285 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:55:00,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:55:00,311 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:55:00,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:55:00 WrapperNode [2020-08-19 02:55:00,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:55:00,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:55:00,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:55:00,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:55:00,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:55:00" (1/1) ... [2020-08-19 02:55:00,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:55:00" (1/1) ... [2020-08-19 02:55:00,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:55:00" (1/1) ... [2020-08-19 02:55:00,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:55:00" (1/1) ... [2020-08-19 02:55:00,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:55:00" (1/1) ... [2020-08-19 02:55:00,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:55:00" (1/1) ... [2020-08-19 02:55:00,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:55:00" (1/1) ... [2020-08-19 02:55:00,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:55:00,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:55:00,426 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:55:00,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:55:00,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:55:00" (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 [2020-08-19 02:55:00,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:55:00,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:55:00,492 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-19 02:55:00,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 02:55:00,492 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:55:00,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 02:55:00,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:55:00,492 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-19 02:55:00,493 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-19 02:55:00,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 02:55:00,493 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:55:00,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:55:00,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:55:00,688 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:55:00,689 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 02:55:00,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:55:00 BoogieIcfgContainer [2020-08-19 02:55:00,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:55:00,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:55:00,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:55:00,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:55:00,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:55:00" (1/3) ... [2020-08-19 02:55:00,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38cbb3c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:55:00, skipping insertion in model container [2020-08-19 02:55:00,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:55:00" (2/3) ... [2020-08-19 02:55:00,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38cbb3c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:55:00, skipping insertion in model container [2020-08-19 02:55:00,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:55:00" (3/3) ... [2020-08-19 02:55:00,701 INFO L109 eAbstractionObserver]: Analyzing ICFG loopv1.c [2020-08-19 02:55:00,711 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:55:00,719 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 02:55:00,731 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 02:55:00,754 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:55:00,754 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:55:00,754 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:55:00,754 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:55:00,754 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:55:00,754 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:55:00,755 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:55:00,755 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:55:00,771 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-08-19 02:55:00,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-19 02:55:00,776 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:55:00,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:55:00,778 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:55:00,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:55:00,785 INFO L82 PathProgramCache]: Analyzing trace with hash -712399266, now seen corresponding path program 1 times [2020-08-19 02:55:00,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:55:00,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690459295] [2020-08-19 02:55:00,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:55:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:55:00,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:55:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:55:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:55:00,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690459295] [2020-08-19 02:55:00,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:55:00,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:55:00,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41035859] [2020-08-19 02:55:00,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:55:00,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:55:00,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:55:00,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:55:00,989 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2020-08-19 02:55:01,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:55:01,220 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-08-19 02:55:01,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:55:01,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-08-19 02:55:01,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:55:01,234 INFO L225 Difference]: With dead ends: 33 [2020-08-19 02:55:01,235 INFO L226 Difference]: Without dead ends: 14 [2020-08-19 02:55:01,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:55:01,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-19 02:55:01,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-19 02:55:01,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-19 02:55:01,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-08-19 02:55:01,286 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2020-08-19 02:55:01,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:55:01,288 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-08-19 02:55:01,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:55:01,288 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-08-19 02:55:01,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-19 02:55:01,290 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:55:01,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:55:01,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:55:01,291 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:55:01,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:55:01,292 INFO L82 PathProgramCache]: Analyzing trace with hash -721634476, now seen corresponding path program 1 times [2020-08-19 02:55:01,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:55:01,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849007949] [2020-08-19 02:55:01,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:55:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:55:01,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:55:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:55:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:55:01,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849007949] [2020-08-19 02:55:01,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:55:01,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 02:55:01,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203373448] [2020-08-19 02:55:01,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 02:55:01,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:55:01,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 02:55:01,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:55:01,521 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 6 states. [2020-08-19 02:55:01,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:55:01,611 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2020-08-19 02:55:01,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 02:55:01,611 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-08-19 02:55:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:55:01,612 INFO L225 Difference]: With dead ends: 14 [2020-08-19 02:55:01,612 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 02:55:01,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-08-19 02:55:01,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 02:55:01,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 02:55:01,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 02:55:01,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 02:55:01,614 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2020-08-19 02:55:01,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:55:01,615 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 02:55:01,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 02:55:01,615 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 02:55:01,615 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 02:55:01,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:55:01,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 02:55:01,678 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-19 02:55:01,678 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (= ~SIZE~0 |old(~SIZE~0)|) [2020-08-19 02:55:01,678 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 02:55:01,679 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 02:55:01,679 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 02:55:01,679 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 02:55:01,679 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 02:55:01,679 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 7 9) no Hoare annotation was computed. [2020-08-19 02:55:01,680 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-19 02:55:01,680 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2020-08-19 02:55:01,680 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2020-08-19 02:55:01,680 INFO L268 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-08-19 02:55:01,680 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 18 32) the Hoare annotation is: true [2020-08-19 02:55:01,681 INFO L268 CegarLoopResult]: For program point L25(lines 25 28) no Hoare annotation was computed. [2020-08-19 02:55:01,681 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 18 32) no Hoare annotation was computed. [2020-08-19 02:55:01,681 INFO L264 CegarLoopResult]: At program point L25-2(lines 23 29) the Hoare annotation is: (and (<= main_~i~0 (* 3 (div main_~i~0 3))) (<= 0 main_~i~0)) [2020-08-19 02:55:01,681 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-08-19 02:55:01,682 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 29) the Hoare annotation is: (and (<= main_~i~0 (* 3 (div main_~i~0 3))) (<= 0 main_~i~0)) [2020-08-19 02:55:01,682 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 18 32) no Hoare annotation was computed. [2020-08-19 02:55:01,682 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 10 15) the Hoare annotation is: true [2020-08-19 02:55:01,682 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-08-19 02:55:01,682 INFO L268 CegarLoopResult]: For program point L11(lines 11 13) no Hoare annotation was computed. [2020-08-19 02:55:01,683 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 10 15) no Hoare annotation was computed. [2020-08-19 02:55:01,683 INFO L268 CegarLoopResult]: For program point L11-2(lines 10 15) no Hoare annotation was computed. [2020-08-19 02:55:01,683 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-08-19 02:55:01,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 02:55:01 BoogieIcfgContainer [2020-08-19 02:55:01,701 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 02:55:01,704 INFO L168 Benchmark]: Toolchain (without parser) took 1622.66 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 103.4 MB in the beginning and 119.6 MB in the end (delta: -16.2 MB). Peak memory consumption was 45.7 MB. Max. memory is 7.1 GB. [2020-08-19 02:55:01,705 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 02:55:01,706 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.21 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 93.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-19 02:55:01,708 INFO L168 Benchmark]: Boogie Preprocessor took 112.78 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 93.7 MB in the beginning and 180.4 MB in the end (delta: -86.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-19 02:55:01,708 INFO L168 Benchmark]: RCFGBuilder took 267.06 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 168.2 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-19 02:55:01,709 INFO L168 Benchmark]: TraceAbstraction took 1007.86 ms. Allocated memory is still 202.4 MB. Free memory was 167.5 MB in the beginning and 119.6 MB in the end (delta: 48.0 MB). Peak memory consumption was 48.0 MB. Max. memory is 7.1 GB. [2020-08-19 02:55:01,713 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 228.21 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 93.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.78 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 93.7 MB in the beginning and 180.4 MB in the end (delta: -86.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 267.06 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 168.2 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1007.86 ms. Allocated memory is still 202.4 MB. Free memory was 167.5 MB in the beginning and 119.6 MB in the end (delta: 48.0 MB). Peak memory consumption was 48.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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: 23]: Loop Invariant Derived loop invariant: i <= 3 * (i / 3) && 0 <= i - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 21 SDslu, 22 SDs, 0 SdLazy, 26 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred 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, 29 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 19 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 572 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...