/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/ldv-regression/test_while_int.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:27:18,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:27:18,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:27:18,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 18:27:18,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:27:18,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:27:18,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:27:18,322 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 [2020-10-23 18:27:18,349 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:27:18,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:27:18,350 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:27:18,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:27:18,351 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:27:18,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:27:18,351 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:27:18,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:27:18,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:27:18,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:27:18,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:27:18,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:27:18,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:27:18,353 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:27:18,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:27:18,353 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:27:18,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:27:18,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:27:18,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:27:18,354 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:27:18,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:27:18,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:27:18,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:27:18,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:27:18,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:27:18,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:27:18,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:27:18,356 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:27:18,356 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:27:18,356 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:27:18,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:27:18,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:27:18,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:27:18,766 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:27:18,767 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:27:18,768 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.i [2020-10-23 18:27:18,847 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47b355896/a1d7f08c01124b0d84a1ca902c1fb51b/FLAGfa119477e [2020-10-23 18:27:19,424 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:27:19,424 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.i [2020-10-23 18:27:19,432 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47b355896/a1d7f08c01124b0d84a1ca902c1fb51b/FLAGfa119477e [2020-10-23 18:27:19,770 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47b355896/a1d7f08c01124b0d84a1ca902c1fb51b [2020-10-23 18:27:19,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:27:19,787 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:27:19,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:27:19,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:27:19,796 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:27:19,797 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:27:19" (1/1) ... [2020-10-23 18:27:19,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f305ef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:19, skipping insertion in model container [2020-10-23 18:27:19,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:27:19" (1/1) ... [2020-10-23 18:27:19,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:27:19,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:27:19,985 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:27:19,996 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:27:20,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:27:20,024 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:27:20,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:20 WrapperNode [2020-10-23 18:27:20,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:27:20,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:27:20,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:27:20,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:27:20,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:20" (1/1) ... [2020-10-23 18:27:20,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:20" (1/1) ... [2020-10-23 18:27:20,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:20" (1/1) ... [2020-10-23 18:27:20,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:20" (1/1) ... [2020-10-23 18:27:20,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:20" (1/1) ... [2020-10-23 18:27:20,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:20" (1/1) ... [2020-10-23 18:27:20,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:20" (1/1) ... [2020-10-23 18:27:20,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:27:20,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:27:20,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:27:20,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:27:20,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:20" (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 [2020-10-23 18:27:20,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:27:20,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:27:20,214 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:27:20,214 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-10-23 18:27:20,214 INFO L138 BoogieDeclarations]: Found implementation of procedure check_error [2020-10-23 18:27:20,214 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:27:20,214 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:27:20,215 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:27:20,215 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:27:20,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:27:20,215 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-10-23 18:27:20,215 INFO L130 BoogieDeclarations]: Found specification of procedure check_error [2020-10-23 18:27:20,216 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:27:20,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:27:20,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:27:20,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:27:20,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:27:20,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:27:20,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:27:20,469 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:27:20,469 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:27:20,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:27:20 BoogieIcfgContainer [2020-10-23 18:27:20,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:27:20,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:27:20,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:27:20,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:27:20,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:27:19" (1/3) ... [2020-10-23 18:27:20,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@339a4e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:27:20, skipping insertion in model container [2020-10-23 18:27:20,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:20" (2/3) ... [2020-10-23 18:27:20,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@339a4e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:27:20, skipping insertion in model container [2020-10-23 18:27:20,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:27:20" (3/3) ... [2020-10-23 18:27:20,482 INFO L111 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2020-10-23 18:27:20,495 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:27:20,500 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:27:20,516 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:27:20,547 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:27:20,548 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:27:20,548 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:27:20,548 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:27:20,548 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:27:20,548 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:27:20,548 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:27:20,548 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:27:20,567 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-23 18:27:20,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-23 18:27:20,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:27:20,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:27:20,575 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:27:20,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:27:20,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1657195269, now seen corresponding path program 1 times [2020-10-23 18:27:20,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:27:20,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829842049] [2020-10-23 18:27:20,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:27:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:27:20,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:27:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:27:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:27:20,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829842049] [2020-10-23 18:27:20,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:27:20,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 18:27:20,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833595941] [2020-10-23 18:27:20,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:27:20,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:27:20,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:27:20,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:27:20,963 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 7 states. [2020-10-23 18:27:21,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:27:21,398 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-10-23 18:27:21,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:27:21,400 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-23 18:27:21,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:27:21,409 INFO L225 Difference]: With dead ends: 48 [2020-10-23 18:27:21,409 INFO L226 Difference]: Without dead ends: 23 [2020-10-23 18:27:21,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:27:21,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-23 18:27:21,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-23 18:27:21,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-23 18:27:21,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-23 18:27:21,466 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13 [2020-10-23 18:27:21,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:27:21,467 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-23 18:27:21,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:27:21,467 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-23 18:27:21,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 18:27:21,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:27:21,469 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:27:21,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:27:21,469 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:27:21,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:27:21,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1579769012, now seen corresponding path program 1 times [2020-10-23 18:27:21,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:27:21,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356819679] [2020-10-23 18:27:21,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:27:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:27:21,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:27:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:27:21,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:27:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:27:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:27:21,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356819679] [2020-10-23 18:27:21,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077687048] [2020-10-23 18:27:21,707 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:27:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:27:21,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:27:21,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:27:21,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:27:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:27:21,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:27:21,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-10-23 18:27:21,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376012609] [2020-10-23 18:27:21,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:27:21,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:27:21,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:27:21,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:27:21,884 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 11 states. [2020-10-23 18:27:22,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:27:22,197 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-23 18:27:22,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:27:22,198 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-23 18:27:22,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:27:22,200 INFO L225 Difference]: With dead ends: 33 [2020-10-23 18:27:22,200 INFO L226 Difference]: Without dead ends: 29 [2020-10-23 18:27:22,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:27:22,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-23 18:27:22,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-23 18:27:22,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-23 18:27:22,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-23 18:27:22,213 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 19 [2020-10-23 18:27:22,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:27:22,214 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-23 18:27:22,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:27:22,214 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-23 18:27:22,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:27:22,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:27:22,217 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:27:22,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:27:22,419 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:27:22,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:27:22,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1493020451, now seen corresponding path program 2 times [2020-10-23 18:27:22,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:27:22,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999992223] [2020-10-23 18:27:22,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:27:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:27:22,483 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:27:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:27:22,533 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:27:22,573 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:27:22,574 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:27:22,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:27:22,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:27:22 BoogieIcfgContainer [2020-10-23 18:27:22,624 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:27:22,627 INFO L168 Benchmark]: Toolchain (without parser) took 2848.14 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 134.1 MB in the beginning and 134.9 MB in the end (delta: -736.7 kB). Peak memory consumption was 29.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:27:22,628 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 124.9 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:27:22,629 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.26 ms. Allocated memory is still 151.0 MB. Free memory was 133.5 MB in the beginning and 124.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:27:22,630 INFO L168 Benchmark]: Boogie Preprocessor took 37.64 ms. Allocated memory is still 151.0 MB. Free memory was 124.4 MB in the beginning and 122.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:27:22,632 INFO L168 Benchmark]: RCFGBuilder took 407.69 ms. Allocated memory is still 151.0 MB. Free memory was 122.8 MB in the beginning and 123.6 MB in the end (delta: -792.2 kB). Peak memory consumption was 2.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:27:22,633 INFO L168 Benchmark]: TraceAbstraction took 2150.80 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 123.1 MB in the beginning and 134.9 MB in the end (delta: -11.7 MB). Peak memory consumption was 19.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:27:22,638 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 124.9 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 233.26 ms. Allocated memory is still 151.0 MB. Free memory was 133.5 MB in the beginning and 124.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.64 ms. Allocated memory is still 151.0 MB. Free memory was 124.4 MB in the beginning and 122.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 407.69 ms. Allocated memory is still 151.0 MB. Free memory was 122.8 MB in the beginning and 123.6 MB in the end (delta: -792.2 kB). Peak memory consumption was 2.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2150.80 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 123.1 MB in the beginning and 134.9 MB in the end (delta: -11.7 MB). Peak memory consumption was 19.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L25] int i=0; VAL [i=0] [L26] COND TRUE i<5 [L27] i++ VAL [i=1] [L31] CALL check_error(i!=3) VAL [\old(b)=1] [L20] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L31] RET check_error(i!=3) VAL [i=1] [L26] COND TRUE i<5 [L27] i++ VAL [i=2] [L31] CALL check_error(i!=3) VAL [\old(b)=1] [L20] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L31] RET check_error(i!=3) VAL [i=2] [L26] COND TRUE i<5 [L27] i++ VAL [i=3] [L31] CALL check_error(i!=3) VAL [\old(b)=0] [L20] (b) ? (0) : __blast_assert () VAL [\old(b)=0, b=0] [L20] CALL __blast_assert () [L8] CALL reach_error() [L3] __assert_fail("0", "test_while_int.i", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.0s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 37 SDslu, 66 SDs, 0 SdLazy, 112 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=2, 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, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 76 NumberOfCodeBlocks, 76 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 48 ConstructedInterpolants, 0 QuantifiedInterpolants, 2280 SizeOfPredicates, 2 NumberOfNonLiveVariables, 105 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 4/8 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 incorrect! Received shutdown request...