/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/concurrent/pthreads/regression/pthreadMutex01-safe.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 12:56:01,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 12:56:01,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 12:56:01,679 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 12:56:01,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 12:56:01,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 12:56:01,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 12:56:01,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 12:56:01,708 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 12:56:01,708 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 12:56:01,710 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 12:56:01,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 12:56:01,717 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 12:56:01,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 12:56:01,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 12:56:01,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 12:56:01,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 12:56:01,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 12:56:01,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 12:56:01,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 12:56:01,740 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 12:56:01,768 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 12:56:01,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 12:56:01,769 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 12:56:01,769 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 12:56:01,772 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 12:56:01,772 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 12:56:01,772 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 12:56:01,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 12:56:01,772 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 12:56:01,773 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 12:56:01,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 12:56:01,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 12:56:01,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 12:56:01,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 12:56:01,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 12:56:01,774 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 12:56:01,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 12:56:01,774 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 12:56:01,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 12:56:01,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 12:56:01,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 12:56:01,775 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 12:56:01,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 12:56:01,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 12:56:01,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 12:56:01,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 12:56:01,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 12:56:01,775 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 12:56:01,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 12:56:01,776 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 12:56:01,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 12:56:01,776 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 12:56:01,776 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 12:56:02,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 12:56:02,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 12:56:02,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 12:56:02,081 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-05 12:56:02,081 INFO L275 PluginConnector]: CDTParser initialized [2021-06-05 12:56:02,082 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/regression/pthreadMutex01-safe.c [2021-06-05 12:56:02,130 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da0f97b89/abb03e03f41f4e01ab77ba6eb807a06c/FLAGc896a10a6 [2021-06-05 12:56:02,449 INFO L306 CDTParser]: Found 1 translation units. [2021-06-05 12:56:02,449 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/regression/pthreadMutex01-safe.c [2021-06-05 12:56:02,449 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2021-06-05 12:56:02,450 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-06-05 12:56:02,478 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da0f97b89/abb03e03f41f4e01ab77ba6eb807a06c/FLAGc896a10a6 [2021-06-05 12:56:02,857 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da0f97b89/abb03e03f41f4e01ab77ba6eb807a06c [2021-06-05 12:56:02,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 12:56:02,866 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-05 12:56:02,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-05 12:56:02,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-05 12:56:02,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-05 12:56:02,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 12:56:02" (1/1) ... [2021-06-05 12:56:02,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a7ea5b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:56:02, skipping insertion in model container [2021-06-05 12:56:02,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 12:56:02" (1/1) ... [2021-06-05 12:56:02,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-05 12:56:02,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-05 12:56:03,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 12:56:03,039 INFO L203 MainTranslator]: Completed pre-run [2021-06-05 12:56:03,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 12:56:03,062 INFO L208 MainTranslator]: Completed translation [2021-06-05 12:56:03,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:56:03 WrapperNode [2021-06-05 12:56:03,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-05 12:56:03,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 12:56:03,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 12:56:03,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 12:56:03,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:56:03" (1/1) ... [2021-06-05 12:56:03,087 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:56:03" (1/1) ... [2021-06-05 12:56:03,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 12:56:03,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 12:56:03,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 12:56:03,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 12:56:03,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:56:03" (1/1) ... [2021-06-05 12:56:03,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:56:03" (1/1) ... [2021-06-05 12:56:03,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:56:03" (1/1) ... [2021-06-05 12:56:03,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:56:03" (1/1) ... [2021-06-05 12:56:03,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:56:03" (1/1) ... [2021-06-05 12:56:03,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:56:03" (1/1) ... [2021-06-05 12:56:03,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:56:03" (1/1) ... [2021-06-05 12:56:03,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 12:56:03,127 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 12:56:03,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 12:56:03,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 12:56:03,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:56:03" (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 [2021-06-05 12:56:03,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-06-05 12:56:03,196 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-06-05 12:56:03,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 12:56:03,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 12:56:03,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-05 12:56:03,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-05 12:56:03,344 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 12:56:03,344 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-05 12:56:03,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 12:56:03 BoogieIcfgContainer [2021-06-05 12:56:03,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 12:56:03,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 12:56:03,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 12:56:03,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 12:56:03,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.06 12:56:02" (1/3) ... [2021-06-05 12:56:03,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@780d3486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 12:56:03, skipping insertion in model container [2021-06-05 12:56:03,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:56:03" (2/3) ... [2021-06-05 12:56:03,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@780d3486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 12:56:03, skipping insertion in model container [2021-06-05 12:56:03,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 12:56:03" (3/3) ... [2021-06-05 12:56:03,352 INFO L111 eAbstractionObserver]: Analyzing ICFG pthreadMutex01-safe.c [2021-06-05 12:56:03,357 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 12:56:03,357 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-06-05 12:56:03,375 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-05 12:56:03,397 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 12:56:03,398 INFO L379 AbstractCegarLoop]: Hoare is true [2021-06-05 12:56:03,398 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 12:56:03,398 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 12:56:03,398 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 12:56:03,398 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 12:56:03,398 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 12:56:03,398 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 12:56:03,409 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 8 states have (on average 1.375) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:56:03,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-06-05 12:56:03,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:56:03,413 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-06-05 12:56:03,413 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:56:03,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:56:03,418 INFO L82 PathProgramCache]: Analyzing trace with hash 925604, now seen corresponding path program 1 times [2021-06-05 12:56:03,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:56:03,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280162808] [2021-06-05 12:56:03,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:56:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:56:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:56:03,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:56:03,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280162808] [2021-06-05 12:56:03,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280162808] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 12:56:03,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 12:56:03,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 12:56:03,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736160675] [2021-06-05 12:56:03,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 12:56:03,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:56:03,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 12:56:03,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 12:56:03,558 INFO L87 Difference]: Start difference. First operand has 11 states, 8 states have (on average 1.375) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:56:03,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:56:03,571 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-06-05 12:56:03,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 12:56:03,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-06-05 12:56:03,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:56:03,579 INFO L225 Difference]: With dead ends: 14 [2021-06-05 12:56:03,579 INFO L226 Difference]: Without dead ends: 6 [2021-06-05 12:56:03,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 12:56:03,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-06-05 12:56:03,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-06-05 12:56:03,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:56:03,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 5 transitions. [2021-06-05 12:56:03,640 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 5 transitions. Word has length 4 [2021-06-05 12:56:03,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:56:03,640 INFO L482 AbstractCegarLoop]: Abstraction has 6 states and 5 transitions. [2021-06-05 12:56:03,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:56:03,641 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 5 transitions. [2021-06-05 12:56:03,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 12:56:03,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:56:03,641 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 12:56:03,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 12:56:03,642 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:56:03,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:56:03,642 INFO L82 PathProgramCache]: Analyzing trace with hash 28697735, now seen corresponding path program 1 times [2021-06-05 12:56:03,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:56:03,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909306595] [2021-06-05 12:56:03,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:56:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:56:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:56:03,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:56:03,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909306595] [2021-06-05 12:56:03,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909306595] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 12:56:03,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 12:56:03,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 12:56:03,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519217219] [2021-06-05 12:56:03,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 12:56:03,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:56:03,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 12:56:03,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 12:56:03,682 INFO L87 Difference]: Start difference. First operand 6 states and 5 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:56:03,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:56:03,686 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2021-06-05 12:56:03,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 12:56:03,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-06-05 12:56:03,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:56:03,688 INFO L225 Difference]: With dead ends: 6 [2021-06-05 12:56:03,688 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 12:56:03,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 12:56:03,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 12:56:03,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 12:56:03,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:56:03,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 12:56:03,689 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2021-06-05 12:56:03,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:56:03,690 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 12:56:03,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:56:03,690 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 12:56:03,690 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 12:56:03,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 12:56:03,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-06-05 12:56:03,700 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-06-05 12:56:03,700 INFO L198 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-06-05 12:56:03,700 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-06-05 12:56:03,700 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-06-05 12:56:03,701 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 43) no Hoare annotation was computed. [2021-06-05 12:56:03,701 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONASSERT(line 47) no Hoare annotation was computed. [2021-06-05 12:56:03,701 INFO L194 CegarLoopUtils]: At program point L49(lines 38 50) the Hoare annotation is: false [2021-06-05 12:56:03,701 INFO L198 CegarLoopUtils]: For program point L47(line 47) no Hoare annotation was computed. [2021-06-05 12:56:03,701 INFO L198 CegarLoopUtils]: For program point L43(line 43) no Hoare annotation was computed. [2021-06-05 12:56:03,701 INFO L198 CegarLoopUtils]: For program point L42(lines 42 44) no Hoare annotation was computed. [2021-06-05 12:56:03,702 INFO L198 CegarLoopUtils]: For program point L42-2(lines 42 44) no Hoare annotation was computed. [2021-06-05 12:56:03,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 12:56:03 BoogieIcfgContainer [2021-06-05 12:56:03,708 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 12:56:03,709 INFO L168 Benchmark]: Toolchain (without parser) took 843.27 ms. Allocated memory is still 331.4 MB. Free memory was 293.2 MB in the beginning and 274.3 MB in the end (delta: 18.9 MB). Peak memory consumption was 17.6 MB. Max. memory is 16.0 GB. [2021-06-05 12:56:03,709 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 331.4 MB. Free memory was 311.4 MB in the beginning and 311.4 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 12:56:03,710 INFO L168 Benchmark]: CACSL2BoogieTranslator took 195.10 ms. Allocated memory is still 331.4 MB. Free memory was 293.0 MB in the beginning and 314.1 MB in the end (delta: -21.1 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.0 GB. [2021-06-05 12:56:03,711 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.83 ms. Allocated memory is still 331.4 MB. Free memory was 314.1 MB in the beginning and 313.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 12:56:03,711 INFO L168 Benchmark]: Boogie Preprocessor took 22.04 ms. Allocated memory is still 331.4 MB. Free memory is still 312.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 12:56:03,712 INFO L168 Benchmark]: RCFGBuilder took 219.05 ms. Allocated memory is still 331.4 MB. Free memory was 312.0 MB in the beginning and 298.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 12:56:03,712 INFO L168 Benchmark]: TraceAbstraction took 360.65 ms. Allocated memory is still 331.4 MB. Free memory was 297.3 MB in the beginning and 274.3 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-06-05 12:56:03,715 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 331.4 MB. Free memory was 311.4 MB in the beginning and 311.4 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 195.10 ms. Allocated memory is still 331.4 MB. Free memory was 293.0 MB in the beginning and 314.1 MB in the end (delta: -21.1 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 37.83 ms. Allocated memory is still 331.4 MB. Free memory was 314.1 MB in the beginning and 313.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 22.04 ms. Allocated memory is still 331.4 MB. Free memory is still 312.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 219.05 ms. Allocated memory is still 331.4 MB. Free memory was 312.0 MB in the beginning and 298.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 360.65 ms. Allocated memory is still 331.4 MB. Free memory was 297.3 MB in the beginning and 274.3 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 47]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 295.7ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 6.9ms, AutomataDifference: 42.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 8.6ms, InitialAbstractionConstructionTime: 7.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7 SDtfs, 3 SDslu, 1 SDs, 0 SdLazy, 2 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 24.0ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 1 NumberOfFragments, 1 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 2.0ms HoareSimplificationTime, 1 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 2.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 5.7ms SsaConstructionTime, 28.4ms SatisfiabilityAnalysisTime, 66.1ms InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 21 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: 0 RESULT: Ultimate proved your program to be correct! Received shutdown request...