/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/for_infinite_loop_2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:47:45,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:47:45,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:47:45,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:47:45,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:47:45,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:47:45,949 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:47:45,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:47:45,953 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:47:45,955 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:47:45,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:47:45,957 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:47:45,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:47:45,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:47:45,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:47:45,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:47:45,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:47:45,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:47:45,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:47:45,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:47:45,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:47:45,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:47:45,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:47:45,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:47:45,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:47:45,990 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:47:45,991 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:47:45,992 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:47:45,993 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 11:47:46,010 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:47:46,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:47:46,012 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:47:46,012 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:47:46,012 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:47:46,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:47:46,013 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:47:46,013 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:47:46,013 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:47:46,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:47:46,013 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:47:46,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:47:46,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:47:46,014 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:47:46,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:47:46,015 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:47:46,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:47:46,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:47:46,015 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:47:46,016 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:47:46,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:47:46,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:47:46,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:47:46,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:47:46,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:47:46,017 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:47:46,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:46,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:47:46,017 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:47:46,018 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:47:46,330 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:47:46,348 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:47:46,353 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:47:46,355 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:47:46,355 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:47:46,356 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_infinite_loop_2.c [2020-07-20 11:47:46,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0590fc4bd/5c8a94ccc8e9483d94c6d7afc4f861a3/FLAGc1179a5b7 [2020-07-20 11:47:47,064 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:47:47,065 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_infinite_loop_2.c [2020-07-20 11:47:47,072 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0590fc4bd/5c8a94ccc8e9483d94c6d7afc4f861a3/FLAGc1179a5b7 [2020-07-20 11:47:47,421 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0590fc4bd/5c8a94ccc8e9483d94c6d7afc4f861a3 [2020-07-20 11:47:47,431 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:47:47,435 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:47:47,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:47,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:47:47,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:47:47,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:47" (1/1) ... [2020-07-20 11:47:47,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4214c77f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:47, skipping insertion in model container [2020-07-20 11:47:47,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:47" (1/1) ... [2020-07-20 11:47:47,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:47:47,472 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:47:47,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:47,680 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:47:47,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:47,717 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:47:47,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:47 WrapperNode [2020-07-20 11:47:47,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:47,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:47:47,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:47:47,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:47:47,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:47" (1/1) ... [2020-07-20 11:47:47,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:47" (1/1) ... [2020-07-20 11:47:47,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:47" (1/1) ... [2020-07-20 11:47:47,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:47" (1/1) ... [2020-07-20 11:47:47,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:47" (1/1) ... [2020-07-20 11:47:47,844 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:47" (1/1) ... [2020-07-20 11:47:47,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:47" (1/1) ... [2020-07-20 11:47:47,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:47:47,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:47:47,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:47:47,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:47:47,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:47:47,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:47:47,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:47:47,933 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 11:47:47,933 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:47:47,933 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:47:47,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:47:47,933 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:47:47,934 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 11:47:47,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:47:47,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:47:47,935 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:47:47,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:47:47,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:47:48,163 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:47:48,164 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 11:47:48,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:48 BoogieIcfgContainer [2020-07-20 11:47:48,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:47:48,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:47:48,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:47:48,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:47:48,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:47:47" (1/3) ... [2020-07-20 11:47:48,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e7da3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:48, skipping insertion in model container [2020-07-20 11:47:48,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:47" (2/3) ... [2020-07-20 11:47:48,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e7da3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:48, skipping insertion in model container [2020-07-20 11:47:48,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:48" (3/3) ... [2020-07-20 11:47:48,178 INFO L109 eAbstractionObserver]: Analyzing ICFG for_infinite_loop_2.c [2020-07-20 11:47:48,191 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:47:48,201 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:47:48,218 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:47:48,247 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:47:48,248 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:47:48,248 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:47:48,248 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:47:48,248 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:47:48,248 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:47:48,249 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:47:48,249 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:47:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 11:47:48,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 11:47:48,280 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:48,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:47:48,283 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:48,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:48,290 INFO L82 PathProgramCache]: Analyzing trace with hash -253525299, now seen corresponding path program 1 times [2020-07-20 11:47:48,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:48,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140429884] [2020-07-20 11:47:48,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:48,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:47:48,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:47:48,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:48,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140429884] [2020-07-20 11:47:48,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:48,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:47:48,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530667727] [2020-07-20 11:47:48,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:47:48,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:48,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:47:48,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:47:48,425 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-20 11:47:48,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:48,465 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-07-20 11:47:48,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:47:48,466 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-20 11:47:48,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:48,482 INFO L225 Difference]: With dead ends: 33 [2020-07-20 11:47:48,482 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 11:47:48,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:47:48,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 11:47:48,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 11:47:48,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 11:47:48,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-20 11:47:48,540 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2020-07-20 11:47:48,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:48,541 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-20 11:47:48,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:47:48,541 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-20 11:47:48,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 11:47:48,542 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:48,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:47:48,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:48,751 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:48,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:48,752 INFO L82 PathProgramCache]: Analyzing trace with hash -251737839, now seen corresponding path program 1 times [2020-07-20 11:47:48,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:48,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907154929] [2020-07-20 11:47:48,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:48,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:48,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:47:48,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:47:49,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:49,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907154929] [2020-07-20 11:47:49,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:49,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:47:49,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297627566] [2020-07-20 11:47:49,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:47:49,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:49,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:47:49,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:47:49,044 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-07-20 11:47:49,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:49,101 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-07-20 11:47:49,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:47:49,103 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-07-20 11:47:49,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:49,103 INFO L225 Difference]: With dead ends: 15 [2020-07-20 11:47:49,104 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:47:49,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:47:49,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:47:49,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:47:49,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:47:49,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:47:49,106 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2020-07-20 11:47:49,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:49,107 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:47:49,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:47:49,107 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:47:49,107 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:47:49,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:49,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:47:49,389 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 11:47:49,390 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:47:49,390 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:47:49,390 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:47:49,390 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:47:49,390 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:47:49,391 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-07-20 11:47:49,391 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 11:47:49,391 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-07-20 11:47:49,391 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-20 11:47:49,392 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 16 26) the Hoare annotation is: true [2020-07-20 11:47:49,392 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 26) no Hoare annotation was computed. [2020-07-20 11:47:49,392 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (= 0 main_~x~0) [2020-07-20 11:47:49,392 INFO L268 CegarLoopResult]: For program point L23-1(lines 21 24) no Hoare annotation was computed. [2020-07-20 11:47:49,392 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-07-20 11:47:49,393 INFO L264 CegarLoopResult]: At program point L21-2(lines 21 24) the Hoare annotation is: (= 0 main_~x~0) [2020-07-20 11:47:49,393 INFO L264 CegarLoopResult]: At program point L21-3(lines 21 24) the Hoare annotation is: false [2020-07-20 11:47:49,393 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 26) no Hoare annotation was computed. [2020-07-20 11:47:49,393 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 12) the Hoare annotation is: true [2020-07-20 11:47:49,394 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 7 12) no Hoare annotation was computed. [2020-07-20 11:47:49,394 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-07-20 11:47:49,394 INFO L268 CegarLoopResult]: For program point L8(lines 8 10) no Hoare annotation was computed. [2020-07-20 11:47:49,394 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 12) no Hoare annotation was computed. [2020-07-20 11:47:49,395 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-07-20 11:47:49,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:47:49 BoogieIcfgContainer [2020-07-20 11:47:49,417 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:47:49,421 INFO L168 Benchmark]: Toolchain (without parser) took 1985.91 ms. Allocated memory was 144.7 MB in the beginning and 202.9 MB in the end (delta: 58.2 MB). Free memory was 102.8 MB in the beginning and 131.6 MB in the end (delta: -28.9 MB). Peak memory consumption was 29.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:49,422 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 11:47:49,423 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.38 ms. Allocated memory is still 144.7 MB. Free memory was 102.4 MB in the beginning and 92.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:49,424 INFO L168 Benchmark]: Boogie Preprocessor took 127.92 ms. Allocated memory was 144.7 MB in the beginning and 202.9 MB in the end (delta: 58.2 MB). Free memory was 92.9 MB in the beginning and 182.1 MB in the end (delta: -89.2 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:49,426 INFO L168 Benchmark]: RCFGBuilder took 321.89 ms. Allocated memory is still 202.9 MB. Free memory was 181.5 MB in the beginning and 168.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:49,427 INFO L168 Benchmark]: TraceAbstraction took 1247.05 ms. Allocated memory is still 202.9 MB. Free memory was 168.2 MB in the beginning and 131.6 MB in the end (delta: 36.6 MB). Peak memory consumption was 36.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:49,432 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 282.38 ms. Allocated memory is still 144.7 MB. Free memory was 102.4 MB in the beginning and 92.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.92 ms. Allocated memory was 144.7 MB in the beginning and 202.9 MB in the end (delta: 58.2 MB). Free memory was 92.9 MB in the beginning and 182.1 MB in the end (delta: -89.2 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 321.89 ms. Allocated memory is still 202.9 MB. Free memory was 181.5 MB in the beginning and 168.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1247.05 ms. Allocated memory is still 202.9 MB. Free memory was 168.2 MB in the beginning and 131.6 MB in the end (delta: 36.6 MB). Peak memory consumption was 36.6 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: 0 == x - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, 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, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s 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, 0.2s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 300 SizeOfPredicates, 2 NumberOfNonLiveVariables, 66 ConjunctsInSsa, 6 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...