/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-regression/test22-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:52:43,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:52:43,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:52:43,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 03:52:43,677 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:52:43,705 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:52:43,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:52:43,707 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:52:43,707 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:52:43,707 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:52:43,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:52:43,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:52:43,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:52:43,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:52:43,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:52:43,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:52:43,709 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:52:43,709 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:52:43,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:52:43,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:52:43,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:52:43,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:52:43,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:52:43,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:52:43,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:52:43,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:52:43,711 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:52:43,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:52:43,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:52:43,712 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:52:43,712 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:52:44,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:52:44,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:52:44,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:52:44,119 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:52:44,120 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:52:44,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test22-2.c [2020-12-22 03:52:44,215 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17b3084c6/c194e86635444f9999151498ab539ba9/FLAG051e197de [2020-12-22 03:52:44,837 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:52:44,838 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test22-2.c [2020-12-22 03:52:44,846 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17b3084c6/c194e86635444f9999151498ab539ba9/FLAG051e197de [2020-12-22 03:52:45,213 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17b3084c6/c194e86635444f9999151498ab539ba9 [2020-12-22 03:52:45,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:52:45,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:52:45,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:52:45,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:52:45,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:52:45,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:52:45" (1/1) ... [2020-12-22 03:52:45,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c3b6872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45, skipping insertion in model container [2020-12-22 03:52:45,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:52:45" (1/1) ... [2020-12-22 03:52:45,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:52:45,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:52:45,524 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test22-2.c[1029,1042] [2020-12-22 03:52:45,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:52:45,539 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:52:45,577 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test22-2.c[1029,1042] [2020-12-22 03:52:45,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:52:45,605 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:52:45,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45 WrapperNode [2020-12-22 03:52:45,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:52:45,608 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:52:45,608 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:52:45,608 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:52:45,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45" (1/1) ... [2020-12-22 03:52:45,639 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45" (1/1) ... [2020-12-22 03:52:45,676 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:52:45,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:52:45,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:52:45,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:52:45,695 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45" (1/1) ... [2020-12-22 03:52:45,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45" (1/1) ... [2020-12-22 03:52:45,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45" (1/1) ... [2020-12-22 03:52:45,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45" (1/1) ... [2020-12-22 03:52:45,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45" (1/1) ... [2020-12-22 03:52:45,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45" (1/1) ... [2020-12-22 03:52:45,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45" (1/1) ... [2020-12-22 03:52:45,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:52:45,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:52:45,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:52:45,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:52:45,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45" (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 [2020-12-22 03:52:45,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:52:45,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:52:45,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 03:52:45,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:52:45,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:52:45,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 03:52:46,251 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:52:46,251 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-22 03:52:46,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:46 BoogieIcfgContainer [2020-12-22 03:52:46,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:52:46,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:52:46,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:52:46,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:52:46,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:52:45" (1/3) ... [2020-12-22 03:52:46,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca812be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:52:46, skipping insertion in model container [2020-12-22 03:52:46,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:45" (2/3) ... [2020-12-22 03:52:46,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca812be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:52:46, skipping insertion in model container [2020-12-22 03:52:46,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:46" (3/3) ... [2020-12-22 03:52:46,272 INFO L111 eAbstractionObserver]: Analyzing ICFG test22-2.c [2020-12-22 03:52:46,282 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:52:46,287 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:52:46,311 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:52:46,355 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:52:46,355 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:52:46,355 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:52:46,356 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:52:46,356 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:52:46,356 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:52:46,356 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:52:46,356 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:52:46,376 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-12-22 03:52:46,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 03:52:46,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:46,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:46,386 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:46,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:46,394 INFO L82 PathProgramCache]: Analyzing trace with hash 164664103, now seen corresponding path program 1 times [2020-12-22 03:52:46,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:46,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817282963] [2020-12-22 03:52:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:46,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817282963] [2020-12-22 03:52:46,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:46,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:52:46,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297126186] [2020-12-22 03:52:46,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 03:52:46,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:46,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 03:52:46,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:52:46,719 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-12-22 03:52:46,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:46,737 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-12-22 03:52:46,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 03:52:46,739 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-12-22 03:52:46,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:46,749 INFO L225 Difference]: With dead ends: 34 [2020-12-22 03:52:46,749 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 03:52:46,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:52:46,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 03:52:46,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-22 03:52:46,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 03:52:46,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-22 03:52:46,790 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 19 [2020-12-22 03:52:46,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:46,791 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-22 03:52:46,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 03:52:46,792 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-22 03:52:46,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 03:52:46,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:46,793 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] [2020-12-22 03:52:46,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:52:46,794 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:46,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:46,795 INFO L82 PathProgramCache]: Analyzing trace with hash 603612068, now seen corresponding path program 1 times [2020-12-22 03:52:46,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:46,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73346422] [2020-12-22 03:52:46,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:47,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73346422] [2020-12-22 03:52:47,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:47,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 03:52:47,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196765189] [2020-12-22 03:52:47,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 03:52:47,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:47,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 03:52:47,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 03:52:47,133 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 10 states. [2020-12-22 03:52:47,731 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-12-22 03:52:47,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:47,815 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-12-22 03:52:47,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 03:52:47,822 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-12-22 03:52:47,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:47,824 INFO L225 Difference]: With dead ends: 71 [2020-12-22 03:52:47,824 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 03:52:47,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-12-22 03:52:47,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 03:52:47,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 33. [2020-12-22 03:52:47,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 03:52:47,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-12-22 03:52:47,854 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 20 [2020-12-22 03:52:47,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:47,854 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-12-22 03:52:47,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 03:52:47,854 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-12-22 03:52:47,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 03:52:47,856 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:47,857 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] [2020-12-22 03:52:47,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:52:47,857 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:47,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:47,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1304676646, now seen corresponding path program 1 times [2020-12-22 03:52:47,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:47,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412050847] [2020-12-22 03:52:47,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:52:47,948 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:52:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:52:47,983 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:52:48,038 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 03:52:48,038 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 03:52:48,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 03:52:48,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 03:52:48 BoogieIcfgContainer [2020-12-22 03:52:48,118 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 03:52:48,119 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 03:52:48,119 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 03:52:48,120 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 03:52:48,120 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:46" (3/4) ... [2020-12-22 03:52:48,123 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 03:52:48,193 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-regression/test22-2.c-witness.graphml [2020-12-22 03:52:48,193 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 03:52:48,195 INFO L168 Benchmark]: Toolchain (without parser) took 2975.31 ms. Allocated memory is still 152.0 MB. Free memory was 127.3 MB in the beginning and 61.8 MB in the end (delta: 65.4 MB). Peak memory consumption was 65.2 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:48,195 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 152.0 MB. Free memory was 126.7 MB in the beginning and 126.6 MB in the end (delta: 105.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:52:48,196 INFO L168 Benchmark]: CACSL2BoogieTranslator took 379.96 ms. Allocated memory is still 152.0 MB. Free memory was 127.3 MB in the beginning and 117.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:48,197 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.75 ms. Allocated memory is still 152.0 MB. Free memory was 117.2 MB in the beginning and 115.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:48,198 INFO L168 Benchmark]: Boogie Preprocessor took 50.99 ms. Allocated memory is still 152.0 MB. Free memory was 115.5 MB in the beginning and 114.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:48,198 INFO L168 Benchmark]: RCFGBuilder took 525.88 ms. Allocated memory is still 152.0 MB. Free memory was 114.2 MB in the beginning and 96.3 MB in the end (delta: 17.9 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:48,199 INFO L168 Benchmark]: TraceAbstraction took 1859.63 ms. Allocated memory is still 152.0 MB. Free memory was 95.8 MB in the beginning and 64.5 MB in the end (delta: 31.3 MB). Peak memory consumption was 30.6 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:48,200 INFO L168 Benchmark]: Witness Printer took 74.17 ms. Allocated memory is still 152.0 MB. Free memory was 64.5 MB in the beginning and 61.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:48,208 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 152.0 MB. Free memory was 126.7 MB in the beginning and 126.6 MB in the end (delta: 105.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 379.96 ms. Allocated memory is still 152.0 MB. Free memory was 127.3 MB in the beginning and 117.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 69.75 ms. Allocated memory is still 152.0 MB. Free memory was 117.2 MB in the beginning and 115.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 50.99 ms. Allocated memory is still 152.0 MB. Free memory was 115.5 MB in the beginning and 114.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 525.88 ms. Allocated memory is still 152.0 MB. Free memory was 114.2 MB in the beginning and 96.3 MB in the end (delta: 17.9 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1859.63 ms. Allocated memory is still 152.0 MB. Free memory was 95.8 MB in the beginning and 64.5 MB in the end (delta: 31.3 MB). Peak memory consumption was 30.6 MB. Max. memory is 8.0 GB. * Witness Printer took 74.17 ms. Allocated memory is still 152.0 MB. Free memory was 64.5 MB in the beginning and 61.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 50]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L11] struct dummy d1, d2; VAL [d1={5:0}, d2={9:0}] [L15] d1.a = __VERIFIER_nondet_int() [L16] d1.b = __VERIFIER_nondet_int() [L18] d2.a = __VERIFIER_nondet_int() [L19] d2.b = __VERIFIER_nondet_int() [L24] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [d1={5:0}, d2={9:0}] [L24] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L35] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L24] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [d1={5:0}, d2={9:0}] [L24] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L35] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L24] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [d1={5:0}, d2={9:0}] [L24] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L35] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L36] int i = __VERIFIER_nondet_int(); [L37] pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 [L37] EXPR (*pd2).a [L37] pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 VAL [d1={5:0}, d2={9:0}] [L37] COND TRUE pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 [L38] int *pa = &pd1->a; [L39] EXPR pd3->a [L39] i = pd3->a - 10 [L40] EXPR \read(*pa) VAL [d1={5:0}, d2={9:0}] [L40] COND FALSE !(i < *pa) [L29] EXPR s1->a [L29] return s1->a == i; [L43] COND TRUE !check(pd2, i) [L50] reach_error() VAL [d1={5:0}, d2={9:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 54 SDtfs, 59 SDslu, 139 SDs, 0 SdLazy, 138 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=2, 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, 33 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 37 ConstructedInterpolants, 0 QuantifiedInterpolants, 2053 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...