/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/loop-acceleration/multivar_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:25:10,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:25:10,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:25:10,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:25:10,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:25:10,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:25:10,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:25:10,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:25:10,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:25:10,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:25:10,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:25:10,571 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:25:10,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:25:10,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:25:10,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:25:10,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:25:10,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:25:10,600 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 02:25:10,612 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:25:10,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:25:10,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:25:10,614 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:25:10,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:25:10,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:25:10,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:25:10,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:25:10,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:25:10,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:25:10,616 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:25:10,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:25:10,616 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:25:10,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:25:10,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:25:10,617 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:25:10,617 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:25:10,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:25:10,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:25:10,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:25:10,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:25:10,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:25:10,619 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:25:11,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:25:11,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:25:11,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:25:11,084 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:25:11,085 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:25:11,086 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/multivar_1-2.c [2020-10-24 02:25:11,171 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/301bc38a6/a3f94e5d77584d49bfbc022eac977c52/FLAGc268bb1c1 [2020-10-24 02:25:11,809 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:25:11,810 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/multivar_1-2.c [2020-10-24 02:25:11,817 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/301bc38a6/a3f94e5d77584d49bfbc022eac977c52/FLAGc268bb1c1 [2020-10-24 02:25:12,103 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/301bc38a6/a3f94e5d77584d49bfbc022eac977c52 [2020-10-24 02:25:12,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:25:12,116 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:25:12,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:25:12,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:25:12,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:25:12,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:25:12" (1/1) ... [2020-10-24 02:25:12,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bc01cfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:12, skipping insertion in model container [2020-10-24 02:25:12,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:25:12" (1/1) ... [2020-10-24 02:25:12,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:25:12,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:25:12,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:25:12,358 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:25:12,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:25:12,397 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:25:12,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:12 WrapperNode [2020-10-24 02:25:12,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:25:12,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:25:12,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:25:12,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:25:12,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:12" (1/1) ... [2020-10-24 02:25:12,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:12" (1/1) ... [2020-10-24 02:25:12,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:12" (1/1) ... [2020-10-24 02:25:12,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:12" (1/1) ... [2020-10-24 02:25:12,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:12" (1/1) ... [2020-10-24 02:25:12,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:12" (1/1) ... [2020-10-24 02:25:12,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:12" (1/1) ... [2020-10-24 02:25:12,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:25:12,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:25:12,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:25:12,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:25:12,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:25:12,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:25:12,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:25:12,531 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:25:12,531 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:25:12,531 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:25:12,532 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:25:12,532 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:25:12,532 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:25:12,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:25:12,532 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-24 02:25:12,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:25:12,533 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:25:12,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:25:12,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:25:12,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:25:12,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:25:12,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:25:12,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:25:12,824 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:25:12,825 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-24 02:25:12,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:25:12 BoogieIcfgContainer [2020-10-24 02:25:12,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:25:12,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:25:12,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:25:12,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:25:12,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:25:12" (1/3) ... [2020-10-24 02:25:12,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f4c7c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:25:12, skipping insertion in model container [2020-10-24 02:25:12,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:12" (2/3) ... [2020-10-24 02:25:12,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f4c7c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:25:12, skipping insertion in model container [2020-10-24 02:25:12,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:25:12" (3/3) ... [2020-10-24 02:25:12,840 INFO L111 eAbstractionObserver]: Analyzing ICFG multivar_1-2.c [2020-10-24 02:25:12,863 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:25:12,874 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:25:12,912 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:25:12,940 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:25:12,941 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:25:12,941 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:25:12,941 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:25:12,941 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:25:12,942 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:25:12,942 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:25:12,942 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:25:12,960 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-24 02:25:12,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-24 02:25:12,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:12,972 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] [2020-10-24 02:25:12,972 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:12,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:12,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1824432034, now seen corresponding path program 1 times [2020-10-24 02:25:12,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:12,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329050221] [2020-10-24 02:25:12,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:13,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:13,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329050221] [2020-10-24 02:25:13,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:25:13,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 02:25:13,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933365282] [2020-10-24 02:25:13,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 02:25:13,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:13,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 02:25:13,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:25:13,376 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-24 02:25:13,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:13,486 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-10-24 02:25:13,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 02:25:13,489 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-24 02:25:13,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:13,497 INFO L225 Difference]: With dead ends: 49 [2020-10-24 02:25:13,498 INFO L226 Difference]: Without dead ends: 28 [2020-10-24 02:25:13,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:25:13,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-24 02:25:13,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-24 02:25:13,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-24 02:25:13,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-24 02:25:13,554 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 21 [2020-10-24 02:25:13,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:13,555 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-24 02:25:13,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 02:25:13,555 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-24 02:25:13,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-24 02:25:13,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:13,557 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] [2020-10-24 02:25:13,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:25:13,557 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:13,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:13,559 INFO L82 PathProgramCache]: Analyzing trace with hash -2110723544, now seen corresponding path program 1 times [2020-10-24 02:25:13,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:13,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935972517] [2020-10-24 02:25:13,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:25:13,621 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:25:13,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:25:13,652 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:25:13,698 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 02:25:13,698 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 02:25:13,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:25:13,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:25:13 BoogieIcfgContainer [2020-10-24 02:25:13,749 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 02:25:13,752 INFO L168 Benchmark]: Toolchain (without parser) took 1641.58 ms. Allocated memory is still 163.6 MB. Free memory was 139.1 MB in the beginning and 122.3 MB in the end (delta: 16.8 MB). Peak memory consumption was 17.2 MB. Max. memory is 8.0 GB. [2020-10-24 02:25:13,753 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 163.6 MB. Free memory is still 137.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 02:25:13,754 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.96 ms. Allocated memory is still 163.6 MB. Free memory was 138.5 MB in the beginning and 128.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-24 02:25:13,755 INFO L168 Benchmark]: Boogie Preprocessor took 38.17 ms. Allocated memory is still 163.6 MB. Free memory was 128.8 MB in the beginning and 127.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-24 02:25:13,756 INFO L168 Benchmark]: RCFGBuilder took 389.35 ms. Allocated memory is still 163.6 MB. Free memory was 127.4 MB in the beginning and 114.1 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-24 02:25:13,757 INFO L168 Benchmark]: TraceAbstraction took 919.17 ms. Allocated memory is still 163.6 MB. Free memory was 113.8 MB in the beginning and 122.3 MB in the end (delta: -8.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 02:25:13,762 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 163.6 MB. Free memory is still 137.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 275.96 ms. Allocated memory is still 163.6 MB. Free memory was 138.5 MB in the beginning and 128.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.17 ms. Allocated memory is still 163.6 MB. Free memory was 128.8 MB in the beginning and 127.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 389.35 ms. Allocated memory is still 163.6 MB. Free memory was 127.4 MB in the beginning and 114.1 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 919.17 ms. Allocated memory is still 163.6 MB. Free memory was 113.8 MB in the beginning and 122.3 MB in the end (delta: -8.5 MB). There was no memory consumed. 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: [L14] unsigned int x = __VERIFIER_nondet_uint(); VAL [__VERIFIER_nondet_uint()=-1, x=4294967295] [L15] unsigned int y = x + 1; VAL [x=4294967295, y=0] [L17] COND FALSE !(x < 1024) VAL [x=4294967295, y=0] [L22] CALL __VERIFIER_assert(x == y) VAL [\old(cond)=0] [L7] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L8] CALL reach_error() [L3] __assert_fail("0", "multivar_1-2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 17 SDslu, 4 SDs, 0 SdLazy, 9 SolverSat, 3 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=37occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 1000 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...