/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=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/for_infinite_loop_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 12:15:41,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 12:15:41,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 12:15:41,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 12:15:41,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 12:15:41,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 12:15:41,809 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 12:15:41,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 12:15:41,813 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 12:15:41,814 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 12:15:41,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 12:15:41,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 12:15:41,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 12:15:41,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 12:15:41,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 12:15:41,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 12:15:41,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 12:15:41,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 12:15:41,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 12:15:41,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 12:15:41,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 12:15:41,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 12:15:41,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 12:15:41,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 12:15:41,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 12:15:41,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 12:15:41,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 12:15:41,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 12:15:41,841 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 12:15:41,875 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 12:15:41,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 12:15:41,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 12:15:41,877 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 12:15:41,877 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 12:15:41,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 12:15:41,878 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 12:15:41,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 12:15:41,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 12:15:41,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 12:15:41,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 12:15:41,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 12:15:41,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 12:15:41,879 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 12:15:41,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 12:15:41,879 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 12:15:41,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 12:15:41,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 12:15:41,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 12:15:41,882 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 12:15:41,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 12:15:41,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:15:41,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 12:15:41,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 12:15:41,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 12:15:41,884 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 12:15:41,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 12:15:41,884 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 12:15:41,884 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 12:15:41,884 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=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 12:15:42,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 12:15:42,220 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 12:15:42,225 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 12:15:42,227 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 12:15:42,227 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 12:15:42,229 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_infinite_loop_1.c [2020-08-18 12:15:42,311 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5149f0a6a/bec17a17fcc04f5cb5d7546236638f1a/FLAG690f74587 [2020-08-18 12:15:42,744 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 12:15:42,745 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/for_infinite_loop_1.c [2020-08-18 12:15:42,752 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5149f0a6a/bec17a17fcc04f5cb5d7546236638f1a/FLAG690f74587 [2020-08-18 12:15:43,109 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5149f0a6a/bec17a17fcc04f5cb5d7546236638f1a [2020-08-18 12:15:43,120 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 12:15:43,122 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 12:15:43,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 12:15:43,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 12:15:43,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 12:15:43,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:15:43" (1/1) ... [2020-08-18 12:15:43,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dbf213c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:15:43, skipping insertion in model container [2020-08-18 12:15:43,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:15:43" (1/1) ... [2020-08-18 12:15:43,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 12:15:43,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 12:15:43,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:15:43,344 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 12:15:43,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:15:43,377 INFO L208 MainTranslator]: Completed translation [2020-08-18 12:15:43,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:15:43 WrapperNode [2020-08-18 12:15:43,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 12:15:43,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 12:15:43,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 12:15:43,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 12:15:43,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:15:43" (1/1) ... [2020-08-18 12:15:43,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:15:43" (1/1) ... [2020-08-18 12:15:43,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:15:43" (1/1) ... [2020-08-18 12:15:43,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:15:43" (1/1) ... [2020-08-18 12:15:43,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:15:43" (1/1) ... [2020-08-18 12:15:43,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:15:43" (1/1) ... [2020-08-18 12:15:43,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:15:43" (1/1) ... [2020-08-18 12:15:43,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 12:15:43,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 12:15:43,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 12:15:43,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 12:15:43,493 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:15:43" (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 12:15:43,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 12:15:43,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 12:15:43,560 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 12:15:43,560 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 12:15:43,560 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 12:15:43,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 12:15:43,560 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 12:15:43,561 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 12:15:43,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 12:15:43,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 12:15:43,561 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 12:15:43,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 12:15:43,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 12:15:43,759 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 12:15:43,760 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 12:15:43,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:15:43 BoogieIcfgContainer [2020-08-18 12:15:43,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 12:15:43,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 12:15:43,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 12:15:43,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 12:15:43,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 12:15:43" (1/3) ... [2020-08-18 12:15:43,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c05ba5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:15:43, skipping insertion in model container [2020-08-18 12:15:43,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:15:43" (2/3) ... [2020-08-18 12:15:43,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c05ba5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:15:43, skipping insertion in model container [2020-08-18 12:15:43,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:15:43" (3/3) ... [2020-08-18 12:15:43,773 INFO L109 eAbstractionObserver]: Analyzing ICFG for_infinite_loop_1.c [2020-08-18 12:15:43,785 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 12:15:43,792 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 12:15:43,807 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 12:15:43,830 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 12:15:43,831 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 12:15:43,831 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 12:15:43,831 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 12:15:43,831 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 12:15:43,831 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 12:15:43,832 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 12:15:43,832 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 12:15:43,849 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-18 12:15:43,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-18 12:15:43,855 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:43,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:43,856 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:43,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:43,861 INFO L82 PathProgramCache]: Analyzing trace with hash -253525299, now seen corresponding path program 1 times [2020-08-18 12:15:43,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:43,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358117475] [2020-08-18 12:15:43,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:43,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:43,992 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 12:15:43,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358117475] [2020-08-18 12:15:43,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:15:43,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 12:15:43,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232728360] [2020-08-18 12:15:44,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 12:15:44,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:44,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 12:15:44,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 12:15:44,020 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-08-18 12:15:44,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:44,045 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-08-18 12:15:44,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 12:15:44,047 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-08-18 12:15:44,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:44,056 INFO L225 Difference]: With dead ends: 33 [2020-08-18 12:15:44,057 INFO L226 Difference]: Without dead ends: 15 [2020-08-18 12:15:44,061 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 12:15:44,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-08-18 12:15:44,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-08-18 12:15:44,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-18 12:15:44,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-08-18 12:15:44,105 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2020-08-18 12:15:44,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:44,105 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-08-18 12:15:44,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 12:15:44,106 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-08-18 12:15:44,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-18 12:15:44,106 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:44,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:44,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 12:15:44,107 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:44,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:44,108 INFO L82 PathProgramCache]: Analyzing trace with hash -251737839, now seen corresponding path program 1 times [2020-08-18 12:15:44,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:44,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914353218] [2020-08-18 12:15:44,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:44,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:44,212 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 12:15:44,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914353218] [2020-08-18 12:15:44,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:15:44,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 12:15:44,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672942492] [2020-08-18 12:15:44,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:15:44,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:44,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:15:44,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:15:44,217 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-08-18 12:15:44,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:44,254 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-08-18 12:15:44,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 12:15:44,255 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-08-18 12:15:44,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:44,256 INFO L225 Difference]: With dead ends: 15 [2020-08-18 12:15:44,257 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 12:15:44,258 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 12:15:44,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 12:15:44,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 12:15:44,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 12:15:44,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 12:15:44,260 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2020-08-18 12:15:44,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:44,261 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 12:15:44,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:15:44,261 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 12:15:44,262 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 12:15:44,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 12:15:44,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 12:15:44,315 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 12:15:44,316 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 12:15:44,316 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 12:15:44,316 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 12:15:44,317 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 12:15:44,317 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 12:15:44,317 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-08-18 12:15:44,318 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-18 12:15:44,318 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-08-18 12:15:44,318 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-08-18 12:15:44,319 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 16 26) the Hoare annotation is: true [2020-08-18 12:15:44,320 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 26) no Hoare annotation was computed. [2020-08-18 12:15:44,320 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (= main_~x~0 0) [2020-08-18 12:15:44,320 INFO L268 CegarLoopResult]: For program point L23-1(lines 21 24) no Hoare annotation was computed. [2020-08-18 12:15:44,321 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-08-18 12:15:44,321 INFO L264 CegarLoopResult]: At program point L21-2(lines 21 24) the Hoare annotation is: (= main_~x~0 0) [2020-08-18 12:15:44,322 INFO L264 CegarLoopResult]: At program point L21-3(lines 21 24) the Hoare annotation is: false [2020-08-18 12:15:44,322 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 26) no Hoare annotation was computed. [2020-08-18 12:15:44,322 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 12) the Hoare annotation is: true [2020-08-18 12:15:44,323 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 7 12) no Hoare annotation was computed. [2020-08-18 12:15:44,323 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-08-18 12:15:44,323 INFO L268 CegarLoopResult]: For program point L8(lines 8 10) no Hoare annotation was computed. [2020-08-18 12:15:44,324 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 12) no Hoare annotation was computed. [2020-08-18 12:15:44,324 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-08-18 12:15:44,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 12:15:44 BoogieIcfgContainer [2020-08-18 12:15:44,359 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 12:15:44,364 INFO L168 Benchmark]: Toolchain (without parser) took 1239.61 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 101.1 MB in the beginning and 133.8 MB in the end (delta: -32.7 MB). Peak memory consumption was 29.7 MB. Max. memory is 7.1 GB. [2020-08-18 12:15:44,365 INFO L168 Benchmark]: CDTParser took 0.52 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-18 12:15:44,372 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.90 ms. Allocated memory is still 137.9 MB. Free memory was 100.9 MB in the beginning and 91.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-18 12:15:44,373 INFO L168 Benchmark]: Boogie Preprocessor took 113.17 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 91.4 MB in the beginning and 179.3 MB in the end (delta: -87.9 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-08-18 12:15:44,374 INFO L168 Benchmark]: RCFGBuilder took 271.64 ms. Allocated memory is still 200.3 MB. Free memory was 179.3 MB in the beginning and 166.6 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-18 12:15:44,377 INFO L168 Benchmark]: TraceAbstraction took 593.54 ms. Allocated memory is still 200.3 MB. Free memory was 166.6 MB in the beginning and 133.8 MB in the end (delta: 32.8 MB). Peak memory consumption was 32.8 MB. Max. memory is 7.1 GB. [2020-08-18 12:15:44,389 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.52 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 255.90 ms. Allocated memory is still 137.9 MB. Free memory was 100.9 MB in the beginning and 91.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.17 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 91.4 MB in the beginning and 179.3 MB in the end (delta: -87.9 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 271.64 ms. Allocated memory is still 200.3 MB. Free memory was 179.3 MB in the beginning and 166.6 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 593.54 ms. Allocated memory is still 200.3 MB. Free memory was 166.6 MB in the beginning and 133.8 MB in the end (delta: 32.8 MB). Peak memory consumption was 32.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: 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: 21]: Loop Invariant Derived loop invariant: x == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 SDtfs, 6 SDslu, 23 SDs, 0 SdLazy, 7 SolverSat, 0 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=20occurred 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, 8 LocationsWithAnnotation, 10 PreInvPairs, 12 NumberOfFragments, 12 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 320 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...