/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 --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/loops/while_infinite_loop_4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:11:18,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:11:18,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:11:18,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:11:18,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:11:18,949 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:11:18,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:11:18,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:11:18,957 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:11:18,959 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:11:18,960 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:11:18,961 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:11:18,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:11:18,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:11:18,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:11:18,972 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:11:18,973 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:11:18,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:11:18,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:11:18,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:11:18,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:11:18,988 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:11:18,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:11:18,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:11:18,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 23:11:19,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:11:19,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:11:19,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:11:19,008 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 23:11:19,026 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:11:19,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:11:19,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:11:19,029 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:11:19,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:11:19,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:11:19,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:11:19,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:11:19,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:11:19,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:11:19,032 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:11:19,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:11:19,033 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:11:19,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:11:19,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:11:19,034 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:11:19,034 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:11:19,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:11:19,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:11:19,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:11:19,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:11:19,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:11:19,035 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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 [2020-09-04 23:11:19,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:11:19,491 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:11:19,497 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:11:19,498 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:11:19,499 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:11:19,500 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-09-04 23:11:19,587 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0a9c068c/fb1afea8f1dc433c9484bac33676d7f6/FLAG55859788c [2020-09-04 23:11:20,124 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:11:20,125 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-09-04 23:11:20,133 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0a9c068c/fb1afea8f1dc433c9484bac33676d7f6/FLAG55859788c [2020-09-04 23:11:20,470 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0a9c068c/fb1afea8f1dc433c9484bac33676d7f6 [2020-09-04 23:11:20,483 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:11:20,485 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:11:20,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:11:20,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:11:20,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:11:20,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:11:20" (1/1) ... [2020-09-04 23:11:20,499 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 11:11:20, skipping insertion in model container [2020-09-04 23:11:20,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:11:20" (1/1) ... [2020-09-04 23:11:20,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:11:20,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:11:20,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:11:20,742 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:11:20,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:11:20,778 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:11:20,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:20 WrapperNode [2020-09-04 23:11:20,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:11:20,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:11:20,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:11:20,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:11:20,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:20" (1/1) ... [2020-09-04 23:11:20,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:20" (1/1) ... [2020-09-04 23:11:20,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:20" (1/1) ... [2020-09-04 23:11:20,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:20" (1/1) ... [2020-09-04 23:11:20,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:20" (1/1) ... [2020-09-04 23:11:20,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:20" (1/1) ... [2020-09-04 23:11:20,892 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:20" (1/1) ... [2020-09-04 23:11:20,893 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:11:20,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:11:20,894 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:11:20,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:11:20,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:20" (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 23:11:20,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:11:20,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:11:20,970 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:11:20,970 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-09-04 23:11:20,970 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:11:20,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:11:20,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:11:20,970 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-09-04 23:11:20,970 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:11:20,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:11:20,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:11:21,152 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:11:21,153 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-04 23:11:21,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:11:21 BoogieIcfgContainer [2020-09-04 23:11:21,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:11:21,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:11:21,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:11:21,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:11:21,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:11:20" (1/3) ... [2020-09-04 23:11:21,177 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 11:11:21, skipping insertion in model container [2020-09-04 23:11:21,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:20" (2/3) ... [2020-09-04 23:11:21,178 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 11:11:21, skipping insertion in model container [2020-09-04 23:11:21,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:11:21" (3/3) ... [2020-09-04 23:11:21,180 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2020-09-04 23:11:21,203 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:11:21,216 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:11:21,265 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:11:21,315 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:11:21,316 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:11:21,316 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:11:21,316 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:11:21,316 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:11:21,317 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:11:21,317 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:11:21,317 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:11:21,341 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-04 23:11:21,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-04 23:11:21,356 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:21,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:21,358 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:21,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:21,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1063393928, now seen corresponding path program 1 times [2020-09-04 23:11:21,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:21,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825780651] [2020-09-04 23:11:21,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:21,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:21,586 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 23:11:21,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825780651] [2020-09-04 23:11:21,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:11:21,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 23:11:21,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551380639] [2020-09-04 23:11:21,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 23:11:21,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:21,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 23:11:21,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 23:11:21,619 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-09-04 23:11:21,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:21,686 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2020-09-04 23:11:21,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 23:11:21,689 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-09-04 23:11:21,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:21,702 INFO L225 Difference]: With dead ends: 39 [2020-09-04 23:11:21,703 INFO L226 Difference]: Without dead ends: 20 [2020-09-04 23:11:21,707 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 23:11:21,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-04 23:11:21,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-09-04 23:11:21,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-04 23:11:21,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-09-04 23:11:21,758 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 10 [2020-09-04 23:11:21,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:21,759 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-09-04 23:11:21,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 23:11:21,759 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-09-04 23:11:21,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-04 23:11:21,760 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:21,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:21,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:11:21,761 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:21,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:21,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1652124924, now seen corresponding path program 1 times [2020-09-04 23:11:21,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:21,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568236157] [2020-09-04 23:11:21,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:11:21,787 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:11:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:11:21,799 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:11:21,838 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 23:11:21,838 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 23:11:21,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:11:21,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 11:11:21 BoogieIcfgContainer [2020-09-04 23:11:21,877 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 23:11:21,884 INFO L168 Benchmark]: Toolchain (without parser) took 1397.68 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 104.2 MB in the beginning and 144.4 MB in the end (delta: -40.2 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-09-04 23:11:21,885 INFO L168 Benchmark]: CDTParser took 0.22 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: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 23:11:21,886 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.90 ms. Allocated memory is still 140.0 MB. Free memory was 103.9 MB in the beginning and 94.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-04 23:11:21,887 INFO L168 Benchmark]: Boogie Preprocessor took 113.67 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 94.7 MB in the beginning and 182.1 MB in the end (delta: -87.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-09-04 23:11:21,888 INFO L168 Benchmark]: RCFGBuilder took 269.11 ms. Allocated memory is still 202.9 MB. Free memory was 182.1 MB in the beginning and 170.7 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2020-09-04 23:11:21,889 INFO L168 Benchmark]: TraceAbstraction took 712.98 ms. Allocated memory is still 202.9 MB. Free memory was 170.0 MB in the beginning and 144.4 MB in the end (delta: 25.6 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. [2020-09-04 23:11:21,896 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 291.90 ms. Allocated memory is still 140.0 MB. Free memory was 103.9 MB in the beginning and 94.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.67 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 94.7 MB in the beginning and 182.1 MB in the end (delta: -87.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 269.11 ms. Allocated memory is still 202.9 MB. Free memory was 182.1 MB in the beginning and 170.7 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 712.98 ms. Allocated memory is still 202.9 MB. Free memory was 170.0 MB in the beginning and 144.4 MB in the end (delta: 25.6 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int x=0; VAL [\old(x)=2, x=0] [L24] COND TRUE 1 VAL [\old(x)=0, x=0] [L26] CALL eval() VAL [\old(x)=0, x=0] [L14] COND TRUE 1 VAL [\old(x)=0, x=0] [L15] x=1 VAL [\old(x)=0, x=1] [L26] RET eval() VAL [\old(x)=0, x=1] [L27] CALL __VERIFIER_assert(x==0) VAL [\old(cond)=0, \old(x)=0, x=1] [L4] COND TRUE !(cond) VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] [L5] __VERIFIER_error() VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 7 SDslu, 5 SDs, 0 SdLazy, 4 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s 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, 1 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 99 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...