/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -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 0.2.0-7d8eed3 [2020-11-06 22:44:57,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:44:57,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:44:57,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-06 22:44:57,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:44:57,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:44:57,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:44:57,269 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 [2020-11-06 22:44:57,352 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:44:57,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:44:57,354 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:44:57,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:44:57,358 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:44:57,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:44:57,359 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:44:57,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:44:57,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:44:57,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:44:57,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:44:57,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:44:57,360 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:44:57,360 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:44:57,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:44:57,360 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:44:57,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:44:57,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:44:57,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:44:57,361 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:44:57,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:44:57,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:44:57,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:44:57,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:44:57,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:44:57,362 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:44:57,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:44:57,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:44:57,363 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:44:57,363 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:44:57,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:44:57,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:44:57,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:44:57,825 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:44:57,826 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:44:57,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_infinite_loop_2.c [2020-11-06 22:44:57,923 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efc01c1e6/3f9f279c68924152994f7081f1248152/FLAG8cd90c201 [2020-11-06 22:44:58,512 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:44:58,513 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_infinite_loop_2.c [2020-11-06 22:44:58,520 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efc01c1e6/3f9f279c68924152994f7081f1248152/FLAG8cd90c201 [2020-11-06 22:44:58,876 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efc01c1e6/3f9f279c68924152994f7081f1248152 [2020-11-06 22:44:58,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:44:58,888 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:44:58,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:44:58,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:44:58,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:44:58,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:58" (1/1) ... [2020-11-06 22:44:58,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f5fb3da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:58, skipping insertion in model container [2020-11-06 22:44:58,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:58" (1/1) ... [2020-11-06 22:44:58,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:44:58,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:44:59,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:44:59,116 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:44:59,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:44:59,169 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:44:59,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:59 WrapperNode [2020-11-06 22:44:59,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:44:59,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:44:59,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:44:59,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:44:59,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:59" (1/1) ... [2020-11-06 22:44:59,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:59" (1/1) ... [2020-11-06 22:44:59,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:59" (1/1) ... [2020-11-06 22:44:59,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:59" (1/1) ... [2020-11-06 22:44:59,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:59" (1/1) ... [2020-11-06 22:44:59,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:59" (1/1) ... [2020-11-06 22:44:59,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:59" (1/1) ... [2020-11-06 22:44:59,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:44:59,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:44:59,210 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:44:59,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:44:59,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:59" (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 [2020-11-06 22:44:59,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:44:59,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:44:59,336 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:44:59,336 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 22:44:59,336 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:44:59,336 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:44:59,336 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:44:59,336 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:44:59,336 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:44:59,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:44:59,337 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 22:44:59,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:44:59,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:44:59,337 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:44:59,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:44:59,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:44:59,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:44:59,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:44:59,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:44:59,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:44:59,632 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:44:59,633 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:44:59,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:59 BoogieIcfgContainer [2020-11-06 22:44:59,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:44:59,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:44:59,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:44:59,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:44:59,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:44:58" (1/3) ... [2020-11-06 22:44:59,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@699223b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:59, skipping insertion in model container [2020-11-06 22:44:59,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:59" (2/3) ... [2020-11-06 22:44:59,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@699223b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:59, skipping insertion in model container [2020-11-06 22:44:59,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:59" (3/3) ... [2020-11-06 22:44:59,647 INFO L111 eAbstractionObserver]: Analyzing ICFG for_infinite_loop_2.c [2020-11-06 22:44:59,667 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:44:59,671 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:44:59,686 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:44:59,726 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:44:59,727 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:44:59,727 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:44:59,727 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:44:59,727 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:44:59,727 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:44:59,728 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:44:59,728 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:44:59,752 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-11-06 22:44:59,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-06 22:44:59,762 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:59,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:59,764 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:59,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:59,778 INFO L82 PathProgramCache]: Analyzing trace with hash 211868033, now seen corresponding path program 1 times [2020-11-06 22:44:59,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:59,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004758487] [2020-11-06 22:44:59,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:00,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:00,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004758487] [2020-11-06 22:45:00,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:00,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:45:00,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167531907] [2020-11-06 22:45:00,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:45:00,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:00,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:45:00,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:45:00,135 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-11-06 22:45:00,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:00,254 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-11-06 22:45:00,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:45:00,257 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-11-06 22:45:00,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:00,281 INFO L225 Difference]: With dead ends: 39 [2020-11-06 22:45:00,282 INFO L226 Difference]: Without dead ends: 17 [2020-11-06 22:45:00,286 INFO L677 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 [2020-11-06 22:45:00,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-06 22:45:00,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-06 22:45:00,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-06 22:45:00,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-11-06 22:45:00,352 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2020-11-06 22:45:00,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:00,353 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-11-06 22:45:00,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:45:00,353 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-11-06 22:45:00,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-06 22:45:00,355 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:00,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:00,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:45:00,356 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:00,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:00,357 INFO L82 PathProgramCache]: Analyzing trace with hash 267279293, now seen corresponding path program 1 times [2020-11-06 22:45:00,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:00,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060356075] [2020-11-06 22:45:00,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:00,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:00,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060356075] [2020-11-06 22:45:00,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:00,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:45:00,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22063926] [2020-11-06 22:45:00,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:45:00,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:00,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:45:00,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:45:00,676 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-11-06 22:45:00,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:00,875 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-11-06 22:45:00,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:45:00,875 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-11-06 22:45:00,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:00,876 INFO L225 Difference]: With dead ends: 17 [2020-11-06 22:45:00,876 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:45:00,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:45:00,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:45:00,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:45:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:45:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:45:00,879 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2020-11-06 22:45:00,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:00,879 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:45:00,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:45:00,880 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:45:00,880 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:45:00,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:45:00,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:45:01,024 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-11-06 22:45:01,024 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-06 22:45:01,025 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-11-06 22:45:01,025 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-06 22:45:01,025 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:45:01,025 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-11-06 22:45:01,025 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:45:01,026 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:45:01,026 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:45:01,026 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:45:01,026 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:45:01,026 INFO L266 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2020-11-06 22:45:01,026 INFO L266 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-11-06 22:45:01,027 INFO L266 CegarLoopResult]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2020-11-06 22:45:01,027 INFO L266 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2020-11-06 22:45:01,027 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 18 28) the Hoare annotation is: true [2020-11-06 22:45:01,027 INFO L262 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (= main_~x~0 0) [2020-11-06 22:45:01,028 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 18 28) no Hoare annotation was computed. [2020-11-06 22:45:01,028 INFO L266 CegarLoopResult]: For program point L25-1(lines 23 26) no Hoare annotation was computed. [2020-11-06 22:45:01,028 INFO L266 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-11-06 22:45:01,028 INFO L262 CegarLoopResult]: At program point L23-2(lines 23 26) the Hoare annotation is: (= main_~x~0 0) [2020-11-06 22:45:01,028 INFO L262 CegarLoopResult]: At program point L23-3(lines 23 26) the Hoare annotation is: false [2020-11-06 22:45:01,028 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 18 28) no Hoare annotation was computed. [2020-11-06 22:45:01,029 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 9 14) the Hoare annotation is: true [2020-11-06 22:45:01,029 INFO L262 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-06 22:45:01,029 INFO L266 CegarLoopResult]: For program point L10(lines 10 12) no Hoare annotation was computed. [2020-11-06 22:45:01,029 INFO L266 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-11-06 22:45:01,029 INFO L266 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 9 14) no Hoare annotation was computed. [2020-11-06 22:45:01,029 INFO L266 CegarLoopResult]: For program point L10-2(lines 9 14) no Hoare annotation was computed. [2020-11-06 22:45:01,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:45:01 BoogieIcfgContainer [2020-11-06 22:45:01,048 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:45:01,051 INFO L168 Benchmark]: Toolchain (without parser) took 2168.07 ms. Allocated memory was 168.8 MB in the beginning and 203.4 MB in the end (delta: 34.6 MB). Free memory was 127.6 MB in the beginning and 149.1 MB in the end (delta: -21.5 MB). Peak memory consumption was 14.2 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:01,052 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 168.8 MB. Free memory is still 143.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:45:01,053 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.23 ms. Allocated memory is still 168.8 MB. Free memory was 126.9 MB in the beginning and 151.6 MB in the end (delta: -24.7 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:01,055 INFO L168 Benchmark]: Boogie Preprocessor took 37.91 ms. Allocated memory is still 168.8 MB. Free memory was 151.6 MB in the beginning and 149.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:01,056 INFO L168 Benchmark]: RCFGBuilder took 425.66 ms. Allocated memory is still 168.8 MB. Free memory was 149.8 MB in the beginning and 139.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:01,057 INFO L168 Benchmark]: TraceAbstraction took 1411.22 ms. Allocated memory was 168.8 MB in the beginning and 203.4 MB in the end (delta: 34.6 MB). Free memory was 139.6 MB in the beginning and 149.1 MB in the end (delta: -9.5 MB). Peak memory consumption was 26.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:01,065 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 168.8 MB. Free memory is still 143.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 280.23 ms. Allocated memory is still 168.8 MB. Free memory was 126.9 MB in the beginning and 151.6 MB in the end (delta: -24.7 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.91 ms. Allocated memory is still 168.8 MB. Free memory was 151.6 MB in the beginning and 149.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 425.66 ms. Allocated memory is still 168.8 MB. Free memory was 149.8 MB in the beginning and 139.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1411.22 ms. Allocated memory was 168.8 MB in the beginning and 203.4 MB in the end (delta: 34.6 MB). Free memory was 139.6 MB in the beginning and 149.1 MB in the end (delta: -9.5 MB). Peak memory consumption was 26.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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: x == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 SDtfs, 24 SDslu, 19 SDs, 0 SdLazy, 25 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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, 10 LocationsWithAnnotation, 15 PreInvPairs, 17 NumberOfFragments, 46 HoareAnnotationTreeSize, 15 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 130 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 1152 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...