/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test_while_int.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 05:17:34,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 05:17:34,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 05:17:35,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 05:17:35,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 05:17:35,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 05:17:35,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 05:17:35,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 05:17:35,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 05:17:35,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 05:17:35,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 05:17:35,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 05:17:35,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 05:17:35,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 05:17:35,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 05:17:35,125 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 05:17:35,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 05:17:35,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 05:17:35,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 05:17:35,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 05:17:35,151 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 05:17:35,175 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 05:17:35,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 05:17:35,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 05:17:35,180 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 05:17:35,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 05:17:35,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 05:17:35,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 05:17:35,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 05:17:35,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 05:17:35,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 05:17:35,183 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 05:17:35,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 05:17:35,184 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 05:17:35,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 05:17:35,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 05:17:35,185 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 05:17:35,185 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 05:17:35,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 05:17:35,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 05:17:35,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 05:17:35,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 05:17:35,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 05:17:35,187 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 05:17:35,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 05:17:35,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 05:17:35,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 05:17:35,639 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 05:17:35,640 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 05:17:35,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.i [2020-11-07 05:17:35,728 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a77e44f52/088e10f53a814b148c9718578716fc84/FLAG9a48109db [2020-11-07 05:17:36,351 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 05:17:36,352 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.i [2020-11-07 05:17:36,359 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a77e44f52/088e10f53a814b148c9718578716fc84/FLAG9a48109db [2020-11-07 05:17:36,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a77e44f52/088e10f53a814b148c9718578716fc84 [2020-11-07 05:17:36,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 05:17:36,716 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 05:17:36,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 05:17:36,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 05:17:36,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 05:17:36,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:17:36" (1/1) ... [2020-11-07 05:17:36,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76ce19ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:36, skipping insertion in model container [2020-11-07 05:17:36,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:17:36" (1/1) ... [2020-11-07 05:17:36,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 05:17:36,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 05:17:36,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:17:36,998 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 05:17:37,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:17:37,035 INFO L208 MainTranslator]: Completed translation [2020-11-07 05:17:37,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:37 WrapperNode [2020-11-07 05:17:37,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 05:17:37,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 05:17:37,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 05:17:37,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 05:17:37,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:37" (1/1) ... [2020-11-07 05:17:37,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:37" (1/1) ... [2020-11-07 05:17:37,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:37" (1/1) ... [2020-11-07 05:17:37,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:37" (1/1) ... [2020-11-07 05:17:37,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:37" (1/1) ... [2020-11-07 05:17:37,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:37" (1/1) ... [2020-11-07 05:17:37,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:37" (1/1) ... [2020-11-07 05:17:37,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 05:17:37,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 05:17:37,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 05:17:37,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 05:17:37,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:37" (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 [2020-11-07 05:17:37,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 05:17:37,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 05:17:37,175 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 05:17:37,175 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-11-07 05:17:37,176 INFO L138 BoogieDeclarations]: Found implementation of procedure check_error [2020-11-07 05:17:37,176 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 05:17:37,176 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 05:17:37,176 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 05:17:37,176 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 05:17:37,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 05:17:37,177 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-11-07 05:17:37,177 INFO L130 BoogieDeclarations]: Found specification of procedure check_error [2020-11-07 05:17:37,177 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 05:17:37,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 05:17:37,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 05:17:37,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 05:17:37,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 05:17:37,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 05:17:37,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 05:17:37,496 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 05:17:37,497 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 05:17:37,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:17:37 BoogieIcfgContainer [2020-11-07 05:17:37,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 05:17:37,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 05:17:37,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 05:17:37,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 05:17:37,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 05:17:36" (1/3) ... [2020-11-07 05:17:37,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d234aea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:17:37, skipping insertion in model container [2020-11-07 05:17:37,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:37" (2/3) ... [2020-11-07 05:17:37,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d234aea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:17:37, skipping insertion in model container [2020-11-07 05:17:37,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:17:37" (3/3) ... [2020-11-07 05:17:37,530 INFO L111 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2020-11-07 05:17:37,547 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 05:17:37,551 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 05:17:37,565 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 05:17:37,613 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 05:17:37,613 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 05:17:37,613 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 05:17:37,613 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 05:17:37,613 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 05:17:37,614 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 05:17:37,614 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 05:17:37,614 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 05:17:37,651 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-11-07 05:17:37,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-07 05:17:37,661 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:17:37,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:17:37,663 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:17:37,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:17:37,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1405725244, now seen corresponding path program 1 times [2020-11-07 05:17:37,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:17:37,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627710005] [2020-11-07 05:17:37,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:17:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:17:38,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:17:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:17:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:17:38,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627710005] [2020-11-07 05:17:38,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:17:38,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 05:17:38,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806382765] [2020-11-07 05:17:38,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 05:17:38,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:17:38,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 05:17:38,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-07 05:17:38,289 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 8 states. [2020-11-07 05:17:38,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:17:38,809 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2020-11-07 05:17:38,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 05:17:38,811 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-11-07 05:17:38,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:17:38,819 INFO L225 Difference]: With dead ends: 66 [2020-11-07 05:17:38,820 INFO L226 Difference]: Without dead ends: 38 [2020-11-07 05:17:38,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-11-07 05:17:38,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-07 05:17:38,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-11-07 05:17:38,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-07 05:17:38,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-11-07 05:17:38,875 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 23 [2020-11-07 05:17:38,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:17:38,876 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-11-07 05:17:38,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 05:17:38,877 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-11-07 05:17:38,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-07 05:17:38,878 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:17:38,878 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:17:38,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 05:17:38,879 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:17:38,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:17:38,880 INFO L82 PathProgramCache]: Analyzing trace with hash -940867191, now seen corresponding path program 1 times [2020-11-07 05:17:38,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:17:38,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494053345] [2020-11-07 05:17:38,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:17:38,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:17:39,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:17:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:17:39,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 05:17:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:17:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:17:39,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494053345] [2020-11-07 05:17:39,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:17:39,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-07 05:17:39,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361996058] [2020-11-07 05:17:39,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 05:17:39,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:17:39,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 05:17:39,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-07 05:17:39,049 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 10 states. [2020-11-07 05:17:39,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:17:39,598 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-11-07 05:17:39,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 05:17:39,599 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-11-07 05:17:39,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:17:39,601 INFO L225 Difference]: With dead ends: 51 [2020-11-07 05:17:39,601 INFO L226 Difference]: Without dead ends: 47 [2020-11-07 05:17:39,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-11-07 05:17:39,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-07 05:17:39,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-11-07 05:17:39,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-07 05:17:39,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-11-07 05:17:39,620 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 32 [2020-11-07 05:17:39,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:17:39,620 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-11-07 05:17:39,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 05:17:39,621 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-11-07 05:17:39,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-07 05:17:39,622 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:17:39,622 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:17:39,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 05:17:39,623 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:17:39,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:17:39,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1515897700, now seen corresponding path program 2 times [2020-11-07 05:17:39,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:17:39,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080883617] [2020-11-07 05:17:39,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:17:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:17:39,650 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:17:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:17:39,696 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:17:39,731 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 05:17:39,731 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 05:17:39,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 05:17:39,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 05:17:39 BoogieIcfgContainer [2020-11-07 05:17:39,786 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 05:17:39,791 INFO L168 Benchmark]: Toolchain (without parser) took 3078.38 ms. Allocated memory was 151.0 MB in the beginning and 190.8 MB in the end (delta: 39.8 MB). Free memory was 127.0 MB in the beginning and 130.8 MB in the end (delta: -3.8 MB). Peak memory consumption was 36.8 MB. Max. memory is 8.0 GB. [2020-11-07 05:17:39,793 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 125.2 MB in the end (delta: 119.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 05:17:39,796 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.99 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 117.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-07 05:17:39,797 INFO L168 Benchmark]: Boogie Preprocessor took 39.14 ms. Allocated memory is still 151.0 MB. Free memory was 117.3 MB in the beginning and 116.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 05:17:39,799 INFO L168 Benchmark]: RCFGBuilder took 422.30 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 103.2 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-11-07 05:17:39,805 INFO L168 Benchmark]: TraceAbstraction took 2285.24 ms. Allocated memory was 151.0 MB in the beginning and 190.8 MB in the end (delta: 39.8 MB). Free memory was 102.8 MB in the beginning and 130.8 MB in the end (delta: -28.0 MB). Peak memory consumption was 12.7 MB. Max. memory is 8.0 GB. [2020-11-07 05:17:39,813 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 125.2 MB in the end (delta: 119.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 312.99 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 117.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.14 ms. Allocated memory is still 151.0 MB. Free memory was 117.3 MB in the beginning and 116.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 422.30 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 103.2 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2285.24 ms. Allocated memory was 151.0 MB in the beginning and 190.8 MB in the end (delta: 39.8 MB). Free memory was 102.8 MB in the beginning and 130.8 MB in the end (delta: -28.0 MB). Peak memory consumption was 12.7 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 VAL [i=0] [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 VAL [i=1] [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 VAL [i=2] [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, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.1s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 45 SDtfs, 68 SDslu, 150 SDs, 0 SdLazy, 162 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred 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, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 53 ConstructedInterpolants, 0 QuantifiedInterpolants, 4193 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 2/7 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...