/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test29-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 05:17:09,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 05:17:09,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 05:17:09,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 05:17:09,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 05:17:09,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 05:17:09,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 05:17:09,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 05:17:09,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 05:17:09,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 05:17:09,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 05:17:09,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 05:17:09,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 05:17:09,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 05:17:09,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 05:17:09,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 05:17:09,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 05:17:09,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 05:17:09,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 05:17:09,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 05:17:09,541 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 05:17:09,565 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 05:17:09,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 05:17:09,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 05:17:09,571 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 05:17:09,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 05:17:09,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 05:17:09,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 05:17:09,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 05:17:09,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 05:17:09,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 05:17:09,573 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 05:17:09,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 05:17:09,574 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 05:17:09,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 05:17:09,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 05:17:09,574 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 05:17:09,575 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 05:17:09,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 05:17:09,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 05:17:09,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 05:17:09,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 05:17:09,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 05:17:09,576 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 05:17:10,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 05:17:10,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 05:17:10,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 05:17:10,082 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 05:17:10,082 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 05:17:10,083 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test29-1.c [2020-11-07 05:17:10,180 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aeccb3939/6d611ee54ffb49368c34d5cde84bfd41/FLAG119dce8e0 [2020-11-07 05:17:10,894 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 05:17:10,895 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test29-1.c [2020-11-07 05:17:10,903 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aeccb3939/6d611ee54ffb49368c34d5cde84bfd41/FLAG119dce8e0 [2020-11-07 05:17:11,262 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aeccb3939/6d611ee54ffb49368c34d5cde84bfd41 [2020-11-07 05:17:11,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 05:17:11,273 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 05:17:11,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 05:17:11,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 05:17:11,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 05:17:11,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:17:11" (1/1) ... [2020-11-07 05:17:11,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@429286ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:11, skipping insertion in model container [2020-11-07 05:17:11,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:17:11" (1/1) ... [2020-11-07 05:17:11,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 05:17:11,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 05:17:11,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:17:11,492 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 05:17:11,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:17:11,535 INFO L208 MainTranslator]: Completed translation [2020-11-07 05:17:11,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:11 WrapperNode [2020-11-07 05:17:11,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 05:17:11,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 05:17:11,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 05:17:11,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 05:17:11,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:11" (1/1) ... [2020-11-07 05:17:11,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:11" (1/1) ... [2020-11-07 05:17:11,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:11" (1/1) ... [2020-11-07 05:17:11,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:11" (1/1) ... [2020-11-07 05:17:11,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:11" (1/1) ... [2020-11-07 05:17:11,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:11" (1/1) ... [2020-11-07 05:17:11,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:11" (1/1) ... [2020-11-07 05:17:11,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 05:17:11,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 05:17:11,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 05:17:11,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 05:17:11,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 05:17:11,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 05:17:11,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 05:17:11,670 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 05:17:11,671 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 05:17:11,671 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 05:17:11,671 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 05:17:11,671 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 05:17:11,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 05:17:11,672 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 05:17:11,672 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 05:17:11,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 05:17:11,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 05:17:11,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 05:17:11,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 05:17:11,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 05:17:11,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 05:17:12,144 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 05:17:12,145 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 05:17:12,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:17:12 BoogieIcfgContainer [2020-11-07 05:17:12,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 05:17:12,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 05:17:12,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 05:17:12,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 05:17:12,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 05:17:11" (1/3) ... [2020-11-07 05:17:12,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17190f86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:17:12, skipping insertion in model container [2020-11-07 05:17:12,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:11" (2/3) ... [2020-11-07 05:17:12,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17190f86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:17:12, skipping insertion in model container [2020-11-07 05:17:12,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:17:12" (3/3) ... [2020-11-07 05:17:12,157 INFO L111 eAbstractionObserver]: Analyzing ICFG test29-1.c [2020-11-07 05:17:12,194 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 05:17:12,198 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 05:17:12,211 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 05:17:12,254 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 05:17:12,255 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 05:17:12,255 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 05:17:12,255 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 05:17:12,255 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 05:17:12,255 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 05:17:12,256 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 05:17:12,256 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 05:17:12,276 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-11-07 05:17:12,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-07 05:17:12,299 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:17:12,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:17:12,301 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:17:12,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:17:12,315 INFO L82 PathProgramCache]: Analyzing trace with hash 99822708, now seen corresponding path program 1 times [2020-11-07 05:17:12,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:17:12,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146500793] [2020-11-07 05:17:12,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:17:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:17:12,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:17:12,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:17:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:17:12,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146500793] [2020-11-07 05:17:12,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:17:12,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:17:12,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105176444] [2020-11-07 05:17:12,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:17:12,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:17:12,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:17:12,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:17:12,793 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 4 states. [2020-11-07 05:17:13,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:17:13,021 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2020-11-07 05:17:13,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:17:13,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-11-07 05:17:13,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:17:13,032 INFO L225 Difference]: With dead ends: 67 [2020-11-07 05:17:13,032 INFO L226 Difference]: Without dead ends: 38 [2020-11-07 05:17:13,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:17:13,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-07 05:17:13,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-11-07 05:17:13,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-07 05:17:13,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-11-07 05:17:13,093 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2020-11-07 05:17:13,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:17:13,094 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-11-07 05:17:13,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:17:13,095 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-11-07 05:17:13,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-07 05:17:13,096 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:17:13,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:17:13,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 05:17:13,097 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:17:13,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:17:13,098 INFO L82 PathProgramCache]: Analyzing trace with hash 938594615, now seen corresponding path program 1 times [2020-11-07 05:17:13,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:17:13,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828124667] [2020-11-07 05:17:13,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:17:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:17:13,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:17:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:17:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:17:13,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828124667] [2020-11-07 05:17:13,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:17:13,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 05:17:13,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775789862] [2020-11-07 05:17:13,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 05:17:13,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:17:13,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 05:17:13,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-07 05:17:13,333 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 8 states. [2020-11-07 05:17:13,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:17:13,724 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-11-07 05:17:13,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 05:17:13,725 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-11-07 05:17:13,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:17:13,727 INFO L225 Difference]: With dead ends: 55 [2020-11-07 05:17:13,727 INFO L226 Difference]: Without dead ends: 36 [2020-11-07 05:17:13,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-11-07 05:17:13,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-07 05:17:13,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-07 05:17:13,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-07 05:17:13,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 35 transitions. [2020-11-07 05:17:13,740 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 35 transitions. Word has length 35 [2020-11-07 05:17:13,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:17:13,741 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 35 transitions. [2020-11-07 05:17:13,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 05:17:13,741 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 35 transitions. [2020-11-07 05:17:13,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-07 05:17:13,742 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:17:13,742 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:17:13,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 05:17:13,743 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:17:13,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:17:13,744 INFO L82 PathProgramCache]: Analyzing trace with hash 321879351, now seen corresponding path program 1 times [2020-11-07 05:17:13,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:17:13,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133661261] [2020-11-07 05:17:13,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:17:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:17:13,775 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:17:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:17:13,798 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:17:13,846 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 05:17:13,846 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 05:17:13,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 05:17:13,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 05:17:13 BoogieIcfgContainer [2020-11-07 05:17:13,916 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 05:17:13,919 INFO L168 Benchmark]: Toolchain (without parser) took 2649.94 ms. Allocated memory is still 151.0 MB. Free memory was 127.7 MB in the beginning and 114.7 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. [2020-11-07 05:17:13,920 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 125.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 05:17:13,921 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.94 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 117.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-07 05:17:13,922 INFO L168 Benchmark]: Boogie Preprocessor took 41.99 ms. Allocated memory is still 151.0 MB. Free memory was 117.5 MB in the beginning and 116.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 05:17:13,923 INFO L168 Benchmark]: RCFGBuilder took 566.76 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 99.7 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-11-07 05:17:13,924 INFO L168 Benchmark]: TraceAbstraction took 1767.06 ms. Allocated memory is still 151.0 MB. Free memory was 99.2 MB in the beginning and 114.7 MB in the end (delta: -15.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 05:17:13,929 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 125.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 261.94 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 117.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.99 ms. Allocated memory is still 151.0 MB. Free memory was 117.5 MB in the beginning and 116.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 566.76 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 99.7 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1767.06 ms. Allocated memory is still 151.0 MB. Free memory was 99.2 MB in the beginning and 114.7 MB in the end (delta: -15.4 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: [L15] union dummy d1, d2; VAL [d1={8:0}, d2={3:0}] [L16] int n = __VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=0, d1={8:0}, d2={3:0}, n=0] [L17] EXPR n ? &d1 : &d2 VAL [d1={8:0}, d2={3:0}, n=0, n ? &d1 : &d2={3:0}] [L17] union dummy *pd = n ? &d1 : &d2; VAL [d1={8:0}, d2={3:0}, n=0, n ? &d1 : &d2={3:0}, pd={3:0}] [L18] d1.a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-1, d1={8:0}, d2={3:0}, n=0, pd={3:0}] [L19] COND FALSE !(pd == &d1) VAL [d1={8:0}, d2={3:0}, n=0, pd={3:0}] [L22] pd->b = 0 VAL [d1={8:0}, d2={3:0}, n=0, pd={3:0}] [L24] pd == &d2 && d1.a != 0 VAL [d1={8:0}, d2={3:0}, n=0, pd={3:0}, pd == &d2 && d1.a != 0=1] [L24] EXPR d1.a VAL [d1={8:0}, d1.a=-1, d2={3:0}, n=0, pd={3:0}, pd == &d2 && d1.a != 0=1] [L24] pd == &d2 && d1.a != 0 VAL [d1={8:0}, d1.a=-1, d2={3:0}, n=0, pd={3:0}, pd == &d2 && d1.a != 0=1] [L24] COND TRUE pd == &d2 && d1.a != 0 VAL [d1={8:0}, d1.a=-1, d2={3:0}, n=0, pd={3:0}, pd == &d2 && d1.a != 0=1] [L30] CALL reach_error() [L3] __assert_fail("0", "test29-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 57 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.5s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 76 SDtfs, 68 SDslu, 142 SDs, 0 SdLazy, 145 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 103 NumberOfCodeBlocks, 103 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 5688 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...