/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/while_infinite_loop_3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 17:46:06,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 17:46:06,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 17:46:06,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 17:46:06,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 17:46:06,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 17:46:06,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 17:46:06,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 17:46:06,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 17:46:06,160 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 17:46:06,162 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 17:46:06,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 17:46:06,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 17:46:06,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 17:46:06,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 17:46:06,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 17:46:06,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 17:46:06,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 17:46:06,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 17:46:06,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 17:46:06,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 17:46:06,184 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 17:46:06,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 17:46:06,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 17:46:06,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 17:46:06,198 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 17:46:06,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 17:46:06,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 17:46:06,203 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 17:46:06,206 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 17:46:06,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 17:46:06,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 17:46:06,208 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 17:46:06,209 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 17:46:06,210 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 17:46:06,210 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 17:46:06,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 17:46:06,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 17:46:06,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 17:46:06,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 17:46:06,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 17:46:06,215 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 17:46:06,232 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 17:46:06,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 17:46:06,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 17:46:06,235 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 17:46:06,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 17:46:06,235 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 17:46:06,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 17:46:06,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 17:46:06,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 17:46:06,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 17:46:06,237 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 17:46:06,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 17:46:06,238 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 17:46:06,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 17:46:06,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 17:46:06,239 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 17:46:06,239 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 17:46:06,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 17:46:06,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:46:06,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 17:46:06,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 17:46:06,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 17:46:06,240 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 17:46:06,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 17:46:06,726 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 17:46:06,730 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 17:46:06,732 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 17:46:06,733 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 17:46:06,734 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_3.c [2020-09-04 17:46:06,821 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5b271fbde/65a6fb752f514e7ca82a209e2930fbbb/FLAG6b2ac6c6b [2020-09-04 17:46:07,355 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 17:46:07,356 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/while_infinite_loop_3.c [2020-09-04 17:46:07,364 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5b271fbde/65a6fb752f514e7ca82a209e2930fbbb/FLAG6b2ac6c6b [2020-09-04 17:46:07,702 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5b271fbde/65a6fb752f514e7ca82a209e2930fbbb [2020-09-04 17:46:07,716 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 17:46:07,718 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 17:46:07,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 17:46:07,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 17:46:07,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 17:46:07,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:46:07" (1/1) ... [2020-09-04 17:46:07,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24a5289c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:07, skipping insertion in model container [2020-09-04 17:46:07,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:46:07" (1/1) ... [2020-09-04 17:46:07,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 17:46:07,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 17:46:07,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:46:07,976 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 17:46:07,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:46:08,008 INFO L208 MainTranslator]: Completed translation [2020-09-04 17:46:08,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:08 WrapperNode [2020-09-04 17:46:08,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 17:46:08,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 17:46:08,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 17:46:08,010 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 17:46:08,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:08" (1/1) ... [2020-09-04 17:46:08,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:08" (1/1) ... [2020-09-04 17:46:08,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:08" (1/1) ... [2020-09-04 17:46:08,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:08" (1/1) ... [2020-09-04 17:46:08,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:08" (1/1) ... [2020-09-04 17:46:08,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:08" (1/1) ... [2020-09-04 17:46:08,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:08" (1/1) ... [2020-09-04 17:46:08,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 17:46:08,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 17:46:08,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 17:46:08,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 17:46:08,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:46:08,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 17:46:08,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 17:46:08,198 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 17:46:08,198 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-09-04 17:46:08,198 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 17:46:08,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 17:46:08,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 17:46:08,199 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-09-04 17:46:08,199 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 17:46:08,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 17:46:08,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 17:46:08,402 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 17:46:08,402 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-04 17:46:08,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:46:08 BoogieIcfgContainer [2020-09-04 17:46:08,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 17:46:08,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 17:46:08,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 17:46:08,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 17:46:08,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 05:46:07" (1/3) ... [2020-09-04 17:46:08,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17c4aa95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:46:08, skipping insertion in model container [2020-09-04 17:46:08,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:08" (2/3) ... [2020-09-04 17:46:08,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17c4aa95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:46:08, skipping insertion in model container [2020-09-04 17:46:08,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:46:08" (3/3) ... [2020-09-04 17:46:08,418 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_3.c [2020-09-04 17:46:08,430 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 17:46:08,441 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 17:46:08,468 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 17:46:08,502 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 17:46:08,502 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 17:46:08,502 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 17:46:08,502 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 17:46:08,502 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 17:46:08,503 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 17:46:08,503 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 17:46:08,503 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 17:46:08,525 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-04 17:46:08,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-04 17:46:08,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:08,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:08,540 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:08,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:08,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1063393928, now seen corresponding path program 1 times [2020-09-04 17:46:08,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:08,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825780651] [2020-09-04 17:46:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:08,636 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:08,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:08,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825780651] [2020-09-04 17:46:08,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:08,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 17:46:08,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441490180] [2020-09-04 17:46:08,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 17:46:08,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:08,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 17:46:08,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 17:46:08,767 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-09-04 17:46:08,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:08,840 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2020-09-04 17:46:08,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 17:46:08,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-09-04 17:46:08,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:08,854 INFO L225 Difference]: With dead ends: 39 [2020-09-04 17:46:08,854 INFO L226 Difference]: Without dead ends: 20 [2020-09-04 17:46:08,858 INFO L675 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 [2020-09-04 17:46:08,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-04 17:46:08,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-09-04 17:46:08,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-04 17:46:08,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-09-04 17:46:08,906 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 10 [2020-09-04 17:46:08,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:08,906 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-09-04 17:46:08,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 17:46:08,906 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-09-04 17:46:08,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-04 17:46:08,907 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:08,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:08,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 17:46:08,908 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:08,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:08,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1652124924, now seen corresponding path program 1 times [2020-09-04 17:46:08,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:08,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037097882] [2020-09-04 17:46:08,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:08,911 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:09,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:09,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 17:46:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:09,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:09,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037097882] [2020-09-04 17:46:09,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:09,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 17:46:09,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015096299] [2020-09-04 17:46:09,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 17:46:09,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:09,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 17:46:09,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 17:46:09,043 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2020-09-04 17:46:09,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:09,135 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-09-04 17:46:09,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 17:46:09,136 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-09-04 17:46:09,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:09,136 INFO L225 Difference]: With dead ends: 18 [2020-09-04 17:46:09,137 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 17:46:09,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-04 17:46:09,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 17:46:09,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 17:46:09,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 17:46:09,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 17:46:09,140 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-09-04 17:46:09,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:09,141 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 17:46:09,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 17:46:09,141 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 17:46:09,141 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 17:46:09,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 17:46:09,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 17:46:09,403 INFO L264 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: (= ~x~0 0) [2020-09-04 17:46:09,404 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (= ~x~0 |old(~x~0)|) [2020-09-04 17:46:09,404 INFO L264 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (= ~x~0 0) [2020-09-04 17:46:09,404 INFO L264 CegarLoopResult]: At program point evalENTRY(lines 12 19) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (= |old(~x~0)| 0))) [2020-09-04 17:46:09,405 INFO L264 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (= |old(~x~0)| 0))) [2020-09-04 17:46:09,405 INFO L264 CegarLoopResult]: At program point L14-1(lines 12 19) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (= |old(~x~0)| 0))) [2020-09-04 17:46:09,405 INFO L264 CegarLoopResult]: At program point evalEXIT(lines 12 19) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (= |old(~x~0)| 0))) [2020-09-04 17:46:09,405 INFO L264 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: false [2020-09-04 17:46:09,406 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (= ~x~0 0) [2020-09-04 17:46:09,406 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 17:46:09,406 INFO L264 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: false [2020-09-04 17:46:09,406 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (not (= |old(~x~0)| 0)) [2020-09-04 17:46:09,407 INFO L264 CegarLoopResult]: At program point L27(lines 22 33) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (= |old(~x~0)| 0))) [2020-09-04 17:46:09,407 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (= |old(~x~0)| 0))) [2020-09-04 17:46:09,407 INFO L264 CegarLoopResult]: At program point L26-1(line 26) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (= |old(~x~0)| 0))) [2020-09-04 17:46:09,407 INFO L264 CegarLoopResult]: At program point mainEXIT(lines 22 33) the Hoare annotation is: (not (= |old(~x~0)| 0)) [2020-09-04 17:46:09,408 INFO L264 CegarLoopResult]: At program point L24-1(lines 24 28) the Hoare annotation is: (not (= |old(~x~0)| 0)) [2020-09-04 17:46:09,408 INFO L264 CegarLoopResult]: At program point mainFINAL(lines 22 33) the Hoare annotation is: (not (= |old(~x~0)| 0)) [2020-09-04 17:46:09,408 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-04 17:46:09,409 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 3 8) the Hoare annotation is: (or (not (= ~x~0 0)) (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-09-04 17:46:09,409 INFO L264 CegarLoopResult]: At program point L5(line 5) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= ~x~0 0))) [2020-09-04 17:46:09,409 INFO L264 CegarLoopResult]: At program point L4(lines 4 6) the Hoare annotation is: (or (not (= ~x~0 0)) (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-09-04 17:46:09,410 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= ~x~0 0))) [2020-09-04 17:46:09,410 INFO L264 CegarLoopResult]: At program point L4-2(lines 3 8) the Hoare annotation is: (or (not (= ~x~0 0)) (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-09-04 17:46:09,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 05:46:09 BoogieIcfgContainer [2020-09-04 17:46:09,434 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 17:46:09,439 INFO L168 Benchmark]: Toolchain (without parser) took 1719.19 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 104.6 MB in the beginning and 102.5 MB in the end (delta: 2.2 MB). Peak memory consumption was 64.1 MB. Max. memory is 7.1 GB. [2020-09-04 17:46:09,440 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 17:46:09,441 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.09 ms. Allocated memory is still 140.0 MB. Free memory was 104.4 MB in the beginning and 95.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-04 17:46:09,442 INFO L168 Benchmark]: Boogie Preprocessor took 106.58 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 95.0 MB in the beginning and 181.9 MB in the end (delta: -86.8 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-09-04 17:46:09,443 INFO L168 Benchmark]: RCFGBuilder took 291.75 ms. Allocated memory is still 201.9 MB. Free memory was 181.9 MB in the beginning and 169.9 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-09-04 17:46:09,444 INFO L168 Benchmark]: TraceAbstraction took 1025.11 ms. Allocated memory is still 201.9 MB. Free memory was 169.2 MB in the beginning and 102.5 MB in the end (delta: 66.7 MB). Peak memory consumption was 66.7 MB. Max. memory is 7.1 GB. [2020-09-04 17:46:09,448 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 290.09 ms. Allocated memory is still 140.0 MB. Free memory was 104.4 MB in the beginning and 95.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.58 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 95.0 MB in the beginning and 181.9 MB in the end (delta: -86.8 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 291.75 ms. Allocated memory is still 201.9 MB. Free memory was 181.9 MB in the beginning and 169.9 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1025.11 ms. Allocated memory is still 201.9 MB. Free memory was 169.2 MB in the beginning and 102.5 MB in the end (delta: 66.7 MB). Peak memory consumption was 66.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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 - ProcedureContractResult [Line: 12]: Procedure Contract for eval Derived contract for procedure eval: x == \old(x) || !(\old(x) == 0) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: !(\old(x) == 0) - ProcedureContractResult [Line: 3]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: (!(x == 0) || \old(cond) == 0) || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 26 SDslu, 28 SDs, 0 SdLazy, 14 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 24 LocationsWithAnnotation, 40 PreInvPairs, 47 NumberOfFragments, 140 HoareAnnotationTreeSize, 40 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 24 FomulaSimplificationsInter, 79 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...