/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/test28-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:29:17,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:29:17,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:29:17,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-06 22:29:17,737 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:29:17,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:29:17,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:29:17,740 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 22:29:17,771 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:29:17,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:29:17,776 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:29:17,776 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:29:17,777 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:29:17,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:29:17,777 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:29:17,778 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:29:17,779 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:29:17,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:29:17,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:29:17,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:29:17,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:29:17,783 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:29:17,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:29:17,783 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:29:17,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:29:17,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:29:17,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:29:17,784 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:29:17,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:29:17,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:29:17,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:29:17,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:29:17,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:29:17,786 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:29:17,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:29:17,786 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:29:17,786 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:29:17,787 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:29:18,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:29:18,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:29:18,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:29:18,165 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:29:18,165 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:29:18,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-2.c [2020-11-06 22:29:18,249 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89292917d/2e3e4893ad3b4831a20a8c73c7995279/FLAG1de69b95c [2020-11-06 22:29:18,829 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:29:18,830 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-2.c [2020-11-06 22:29:18,836 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89292917d/2e3e4893ad3b4831a20a8c73c7995279/FLAG1de69b95c [2020-11-06 22:29:19,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89292917d/2e3e4893ad3b4831a20a8c73c7995279 [2020-11-06 22:29:19,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:29:19,229 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:29:19,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:29:19,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:29:19,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:29:19,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:19" (1/1) ... [2020-11-06 22:29:19,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fdbff88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:19, skipping insertion in model container [2020-11-06 22:29:19,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:19" (1/1) ... [2020-11-06 22:29:19,250 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:29:19,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:29:19,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:29:19,477 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:29:19,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:29:19,518 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:29:19,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:19 WrapperNode [2020-11-06 22:29:19,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:29:19,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:29:19,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:29:19,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:29:19,534 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 22:29:19,536 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 22:29:19,547 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 22:29:19,548 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 22:29:19,568 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 22:29:19,571 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 22:29:19,580 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 22:29:19,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:29:19,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:29:19,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:29:19,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:29:19,589 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 22:29:19,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:29:19,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:29:19,684 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:29:19,684 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:29:19,684 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:29:19,685 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:29:19,685 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:29:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:29:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:29:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:29:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:29:19,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:29:19,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:29:19,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:29:19,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:29:19,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:29:20,024 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:29:20,025 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:29:20,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:29:20 BoogieIcfgContainer [2020-11-06 22:29:20,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:29:20,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:29:20,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:29:20,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:29:20,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:29:19" (1/3) ... [2020-11-06 22:29:20,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1651dd10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:29:20, skipping insertion in model container [2020-11-06 22:29:20,035 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 22:29:20,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1651dd10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:29:20, skipping insertion in model container [2020-11-06 22:29:20,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:29:20" (3/3) ... [2020-11-06 22:29:20,038 INFO L111 eAbstractionObserver]: Analyzing ICFG test28-2.c [2020-11-06 22:29:20,056 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:29:20,060 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:29:20,074 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:29:20,104 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:29:20,104 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:29:20,104 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:29:20,105 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:29:20,105 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:29:20,105 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:29:20,105 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:29:20,105 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:29:20,123 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-11-06 22:29:20,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-06 22:29:20,128 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:29:20,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:29:20,129 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:29:20,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:29:20,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1935478553, now seen corresponding path program 1 times [2020-11-06 22:29:20,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:29:20,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117272325] [2020-11-06 22:29:20,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:29:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:20,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:29:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:20,591 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 22:29:20,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117272325] [2020-11-06 22:29:20,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:29:20,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-06 22:29:20,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021685841] [2020-11-06 22:29:20,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:29:20,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:29:20,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:29:20,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:29:20,616 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 7 states. [2020-11-06 22:29:20,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:29:20,792 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-11-06 22:29:20,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:29:20,794 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-11-06 22:29:20,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:29:20,803 INFO L225 Difference]: With dead ends: 36 [2020-11-06 22:29:20,803 INFO L226 Difference]: Without dead ends: 15 [2020-11-06 22:29:20,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:29:20,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-06 22:29:20,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-06 22:29:20,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-06 22:29:20,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2020-11-06 22:29:20,844 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 14 [2020-11-06 22:29:20,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:29:20,844 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2020-11-06 22:29:20,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:29:20,845 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2020-11-06 22:29:20,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-06 22:29:20,845 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:29:20,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:29:20,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:29:20,846 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:29:20,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:29:20,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1607400419, now seen corresponding path program 1 times [2020-11-06 22:29:20,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:29:20,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695493908] [2020-11-06 22:29:20,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:29:20,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:21,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:29:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:21,044 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 22:29:21,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695493908] [2020-11-06 22:29:21,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:29:21,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-06 22:29:21,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323347958] [2020-11-06 22:29:21,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:29:21,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:29:21,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:29:21,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:29:21,052 INFO L87 Difference]: Start difference. First operand 15 states and 14 transitions. Second operand 8 states. [2020-11-06 22:29:21,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:29:21,214 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2020-11-06 22:29:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:29:21,214 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-11-06 22:29:21,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:29:21,214 INFO L225 Difference]: With dead ends: 15 [2020-11-06 22:29:21,215 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:29:21,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:29:21,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:29:21,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:29:21,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:29:21,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:29:21,218 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-11-06 22:29:21,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:29:21,219 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:29:21,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:29:21,219 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:29:21,219 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:29:21,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:29:21,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:29:21,319 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-11-06 22:29:21,320 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-06 22:29:21,320 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-11-06 22:29:21,320 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-06 22:29:21,321 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:29:21,321 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-11-06 22:29:21,321 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:29:21,321 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:29:21,321 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:29:21,321 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:29:21,322 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:29:21,322 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 12 30) no Hoare annotation was computed. [2020-11-06 22:29:21,322 INFO L262 CegarLoopResult]: At program point L23(lines 13 30) the Hoare annotation is: false [2020-11-06 22:29:21,322 INFO L266 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-11-06 22:29:21,322 INFO L266 CegarLoopResult]: For program point L17-2(lines 17 21) no Hoare annotation was computed. [2020-11-06 22:29:21,322 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 12 30) no Hoare annotation was computed. [2020-11-06 22:29:21,323 INFO L262 CegarLoopResult]: At program point mainENTRY(lines 12 30) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2020-11-06 22:29:21,323 INFO L266 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-11-06 22:29:21,323 INFO L266 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-11-06 22:29:21,323 INFO L266 CegarLoopResult]: For program point L22-2(lines 22 24) no Hoare annotation was computed. [2020-11-06 22:29:21,323 INFO L266 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-11-06 22:29:21,324 INFO L266 CegarLoopResult]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-11-06 22:29:21,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:29:21 BoogieIcfgContainer [2020-11-06 22:29:21,334 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:29:21,337 INFO L168 Benchmark]: Toolchain (without parser) took 2110.88 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 62.9 MB in the end (delta: 64.3 MB). Peak memory consumption was 64.8 MB. Max. memory is 8.0 GB. [2020-11-06 22:29:21,338 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 256.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:29:21,339 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.58 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 117.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:29:21,340 INFO L168 Benchmark]: Boogie Preprocessor took 65.59 ms. Allocated memory is still 151.0 MB. Free memory was 117.2 MB in the beginning and 115.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:29:21,341 INFO L168 Benchmark]: RCFGBuilder took 439.04 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 102.2 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:29:21,342 INFO L168 Benchmark]: TraceAbstraction took 1305.44 ms. Allocated memory is still 151.0 MB. Free memory was 101.8 MB in the beginning and 62.9 MB in the end (delta: 38.9 MB). Peak memory consumption was 39.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:29:21,346 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 256.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 289.58 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 117.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 65.59 ms. Allocated memory is still 151.0 MB. Free memory was 117.2 MB in the beginning and 115.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 439.04 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 102.2 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1305.44 ms. Allocated memory is still 151.0 MB. Free memory was 101.8 MB in the beginning and 62.9 MB in the end (delta: 38.9 MB). Peak memory consumption was 39.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 26 SDslu, 57 SDs, 0 SdLazy, 93 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 42 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 1729 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 correct! Received shutdown request...