/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test28-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:29:17,256 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:29:17,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:29:17,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-06 22:29:17,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:29:17,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:29:17,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:29:17,418 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:29:17,470 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:29:17,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:29:17,474 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:29:17,474 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:29:17,474 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:29:17,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:29:17,475 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:29:17,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:29:17,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:29:17,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:29:17,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:29:17,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:29:17,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:29:17,478 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:29:17,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:29:17,478 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:29:17,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:29:17,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:29:17,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:29:17,479 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:29:17,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:29:17,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:29:17,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:29:17,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:29:17,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:29:17,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:29:17,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:29:17,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:29:17,482 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:29:17,482 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:29:17,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:29:17,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:29:17,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:29:17,909 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:29:17,909 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:29:17,910 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-1.c [2020-11-06 22:29:17,990 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b975174c/3b9275d5862e4d4da8168d006a269cb9/FLAGf14358e0d [2020-11-06 22:29:18,536 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:29:18,537 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-1.c [2020-11-06 22:29:18,543 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b975174c/3b9275d5862e4d4da8168d006a269cb9/FLAGf14358e0d [2020-11-06 22:29:18,890 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b975174c/3b9275d5862e4d4da8168d006a269cb9 [2020-11-06 22:29:18,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:29:18,900 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:29:18,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:29:18,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:29:18,905 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:29:18,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:18" (1/1) ... [2020-11-06 22:29:18,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b561ee6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:18, skipping insertion in model container [2020-11-06 22:29:18,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:18" (1/1) ... [2020-11-06 22:29:18,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:29:18,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:29:19,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:29:19,095 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:29:19,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:29:19,129 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:29:19,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:19 WrapperNode [2020-11-06 22:29:19,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:29:19,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:29:19,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:29:19,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:29:19,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:19" (1/1) ... [2020-11-06 22:29:19,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:19" (1/1) ... [2020-11-06 22:29:19,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:19" (1/1) ... [2020-11-06 22:29:19,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:19" (1/1) ... [2020-11-06 22:29:19,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:19" (1/1) ... [2020-11-06 22:29:19,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:19" (1/1) ... [2020-11-06 22:29:19,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:19" (1/1) ... [2020-11-06 22:29:19,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:29:19,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:29:19,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:29:19,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:29:19,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:19" (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 [2020-11-06 22:29:19,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:29:19,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:29:19,332 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:29:19,332 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:29:19,332 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:29:19,333 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:29:19,333 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:29:19,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:29:19,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:29:19,333 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:29:19,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:29:19,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:29:19,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:29:19,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:29:19,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:29:19,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:29:19,753 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:29:19,753 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:29:19,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:29:19 BoogieIcfgContainer [2020-11-06 22:29:19,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:29:19,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:29:19,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:29:19,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:29:19,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:29:18" (1/3) ... [2020-11-06 22:29:19,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@426c9516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:29:19, skipping insertion in model container [2020-11-06 22:29:19,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:19" (2/3) ... [2020-11-06 22:29:19,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@426c9516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:29:19, skipping insertion in model container [2020-11-06 22:29:19,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:29:19" (3/3) ... [2020-11-06 22:29:19,767 INFO L111 eAbstractionObserver]: Analyzing ICFG test28-1.c [2020-11-06 22:29:19,784 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:29:19,788 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:29:19,802 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:29:19,840 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:29:19,841 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:29:19,841 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:29:19,841 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:29:19,841 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:29:19,841 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:29:19,842 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:29:19,842 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:29:19,865 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-11-06 22:29:19,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-06 22:29:19,871 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:29:19,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:29:19,873 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:29:19,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:29:19,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1935478553, now seen corresponding path program 1 times [2020-11-06 22:29:19,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:29:19,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033772675] [2020-11-06 22:29:19,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:29:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:20,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:29:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:29:20,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033772675] [2020-11-06 22:29:20,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:29:20,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:29:20,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511040329] [2020-11-06 22:29:20,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:29:20,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:29:20,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:29:20,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:29:20,379 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-11-06 22:29:20,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:29:20,538 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2020-11-06 22:29:20,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:29:20,540 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-11-06 22:29:20,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:29:20,550 INFO L225 Difference]: With dead ends: 38 [2020-11-06 22:29:20,551 INFO L226 Difference]: Without dead ends: 21 [2020-11-06 22:29:20,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:29:20,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-06 22:29:20,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2020-11-06 22:29:20,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-06 22:29:20,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-11-06 22:29:20,594 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2020-11-06 22:29:20,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:29:20,595 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-11-06 22:29:20,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:29:20,595 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-11-06 22:29:20,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-06 22:29:20,596 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:29:20,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:29:20,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:29:20,597 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:29:20,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:29:20,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1878220251, now seen corresponding path program 1 times [2020-11-06 22:29:20,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:29:20,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422319435] [2020-11-06 22:29:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:29:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:20,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:29:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:29:20,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422319435] [2020-11-06 22:29:20,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:29:20,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-06 22:29:20,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604342042] [2020-11-06 22:29:20,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:29:20,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:29:20,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:29:20,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:29:20,851 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 8 states. [2020-11-06 22:29:21,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:29:21,057 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-11-06 22:29:21,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:29:21,058 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-11-06 22:29:21,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:29:21,059 INFO L225 Difference]: With dead ends: 25 [2020-11-06 22:29:21,059 INFO L226 Difference]: Without dead ends: 15 [2020-11-06 22:29:21,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:29:21,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-06 22:29:21,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-06 22:29:21,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-06 22:29:21,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2020-11-06 22:29:21,068 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 14 [2020-11-06 22:29:21,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:29:21,069 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2020-11-06 22:29:21,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:29:21,069 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2020-11-06 22:29:21,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-06 22:29:21,070 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:29:21,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:29:21,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:29:21,071 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:29:21,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:29:21,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1550142117, now seen corresponding path program 1 times [2020-11-06 22:29:21,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:29:21,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446440637] [2020-11-06 22:29:21,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:29:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:29:21,100 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:29:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:29:21,125 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:29:21,165 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:29:21,166 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:29:21,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 22:29:21,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:29:21 BoogieIcfgContainer [2020-11-06 22:29:21,197 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:29:21,200 INFO L168 Benchmark]: Toolchain (without parser) took 2302.97 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 132.1 MB in the beginning and 130.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 31.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:29:21,201 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 151.0 MB. Free memory is still 122.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:29:21,202 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.12 ms. Allocated memory is still 151.0 MB. Free memory was 131.5 MB in the beginning and 122.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:29:21,203 INFO L168 Benchmark]: Boogie Preprocessor took 71.34 ms. Allocated memory is still 151.0 MB. Free memory was 122.1 MB in the beginning and 134.9 MB in the end (delta: -12.8 MB). Peak memory consumption was 4.9 MB. Max. memory is 8.0 GB. [2020-11-06 22:29:21,204 INFO L168 Benchmark]: RCFGBuilder took 552.77 ms. Allocated memory is still 151.0 MB. Free memory was 134.9 MB in the beginning and 120.9 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:29:21,205 INFO L168 Benchmark]: TraceAbstraction took 1439.45 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 120.6 MB in the beginning and 130.3 MB in the end (delta: -9.7 MB). Peak memory consumption was 21.2 MB. Max. memory is 8.0 GB. [2020-11-06 22:29:21,210 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 151.0 MB. Free memory is still 122.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 229.12 ms. Allocated memory is still 151.0 MB. Free memory was 131.5 MB in the beginning and 122.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 71.34 ms. Allocated memory is still 151.0 MB. Free memory was 122.1 MB in the beginning and 134.9 MB in the end (delta: -12.8 MB). Peak memory consumption was 4.9 MB. Max. memory is 8.0 GB. * RCFGBuilder took 552.77 ms. Allocated memory is still 151.0 MB. Free memory was 134.9 MB in the beginning and 120.9 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1439.45 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 120.6 MB in the beginning and 130.3 MB in the end (delta: -9.7 MB). Peak memory consumption was 21.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] struct dummy d1, d2; [L15] int n = __VERIFIER_nondet_int(); [L16] EXPR n ? &d1 : &d2 VAL [d1={9:0}, d2={3:0}, n=0, n ? &d1 : &d2={3:0}] [L16] struct dummy *pd = n ? &d1 : &d2; [L17] COND TRUE pd == &d2 [L18] pd->a = 0 VAL [d1={9:0}, d2={3:0}, n=0, pd={3:0}] [L22] pd == &d2 && d2.b != 0 [L22] EXPR d2.b [L22] pd == &d2 && d2.b != 0 VAL [d1={9:0}, d2={3:0}, d2.b=49, n=0, pd={3:0}, pd == &d2 && d2.b != 0=1] [L22] COND TRUE pd == &d2 && d2.b != 0 [L28] CALL reach_error() [L3] __assert_fail("0", "test28-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 42 SDslu, 62 SDs, 0 SdLazy, 104 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 1365 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...