./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8d31f386 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d452f938d74713dbff7e0330f8ef393409d67ffe ................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.multireach-323-8d31f38 [2021-07-06 12:05:44,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-06 12:05:44,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-06 12:05:44,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-06 12:05:44,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-06 12:05:44,538 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-06 12:05:44,538 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-06 12:05:44,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-06 12:05:44,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-06 12:05:44,551 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-06 12:05:44,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-06 12:05:44,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-06 12:05:44,553 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-06 12:05:44,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-06 12:05:44,557 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-06 12:05:44,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-06 12:05:44,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-06 12:05:44,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-06 12:05:44,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-06 12:05:44,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-06 12:05:44,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-06 12:05:44,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-06 12:05:44,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-06 12:05:44,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-06 12:05:44,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-06 12:05:44,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-06 12:05:44,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-06 12:05:44,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-06 12:05:44,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-06 12:05:44,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-06 12:05:44,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-06 12:05:44,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-06 12:05:44,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-06 12:05:44,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-06 12:05:44,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-06 12:05:44,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-06 12:05:44,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-06 12:05:44,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-06 12:05:44,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-06 12:05:44,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-06 12:05:44,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-06 12:05:44,582 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-07-06 12:05:44,609 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-06 12:05:44,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-06 12:05:44,611 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-06 12:05:44,611 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-06 12:05:44,611 INFO L138 SettingsManager]: * Use SBE=true [2021-07-06 12:05:44,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-06 12:05:44,612 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-06 12:05:44,612 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-07-06 12:05:44,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-06 12:05:44,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-06 12:05:44,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-06 12:05:44,613 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-07-06 12:05:44,613 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-07-06 12:05:44,613 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-07-06 12:05:44,613 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-06 12:05:44,614 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-07-06 12:05:44,614 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-06 12:05:44,614 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-06 12:05:44,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-06 12:05:44,614 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-06 12:05:44,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-06 12:05:44,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-06 12:05:44,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-06 12:05:44,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-06 12:05:44,615 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-06 12:05:44,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-06 12:05:44,615 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-06 12:05:44,615 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d452f938d74713dbff7e0330f8ef393409d67ffe [2021-07-06 12:05:44,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-06 12:05:44,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-06 12:05:44,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-06 12:05:44,834 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-06 12:05:44,834 INFO L275 PluginConnector]: CDTParser initialized [2021-07-06 12:05:44,835 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c [2021-07-06 12:05:44,875 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccec5354f/41c58277c6aa41e5a38d0fb1b76bc294/FLAGf01d06993 [2021-07-06 12:05:45,192 INFO L306 CDTParser]: Found 1 translation units. [2021-07-06 12:05:45,192 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c [2021-07-06 12:05:45,196 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccec5354f/41c58277c6aa41e5a38d0fb1b76bc294/FLAGf01d06993 [2021-07-06 12:05:45,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccec5354f/41c58277c6aa41e5a38d0fb1b76bc294 [2021-07-06 12:05:45,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-06 12:05:45,212 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-06 12:05:45,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-06 12:05:45,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-06 12:05:45,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-06 12:05:45,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 12:05:45" (1/1) ... [2021-07-06 12:05:45,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28f8003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:05:45, skipping insertion in model container [2021-07-06 12:05:45,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 12:05:45" (1/1) ... [2021-07-06 12:05:45,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-06 12:05:45,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-06 12:05:45,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 12:05:45,355 INFO L203 MainTranslator]: Completed pre-run [2021-07-06 12:05:45,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 12:05:45,373 INFO L208 MainTranslator]: Completed translation [2021-07-06 12:05:45,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:05:45 WrapperNode [2021-07-06 12:05:45,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-06 12:05:45,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-06 12:05:45,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-06 12:05:45,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-06 12:05:45,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:05:45" (1/1) ... [2021-07-06 12:05:45,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:05:45" (1/1) ... [2021-07-06 12:05:45,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:05:45" (1/1) ... [2021-07-06 12:05:45,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:05:45" (1/1) ... [2021-07-06 12:05:45,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:05:45" (1/1) ... [2021-07-06 12:05:45,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:05:45" (1/1) ... [2021-07-06 12:05:45,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:05:45" (1/1) ... [2021-07-06 12:05:45,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-06 12:05:45,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-06 12:05:45,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-06 12:05:45,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-06 12:05:45,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:05:45" (1/1) ... [2021-07-06 12:05:45,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-06 12:05:45,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-06 12:05:45,446 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-07-06 12:05:45,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-07-06 12:05:45,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-07-06 12:05:45,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-06 12:05:45,491 INFO L138 BoogieDeclarations]: Found implementation of procedure freePointer [2021-07-06 12:05:45,491 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-07-06 12:05:45,491 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-07-06 12:05:45,492 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-07-06 12:05:45,492 INFO L130 BoogieDeclarations]: Found specification of procedure freePointer [2021-07-06 12:05:45,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-06 12:05:45,492 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-07-06 12:05:45,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-07-06 12:05:45,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-06 12:05:45,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-07-06 12:05:45,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-06 12:05:45,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-06 12:05:45,680 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-06 12:05:45,680 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-06 12:05:45,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 12:05:45 BoogieIcfgContainer [2021-07-06 12:05:45,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-06 12:05:45,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-06 12:05:45,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-06 12:05:45,684 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-06 12:05:45,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.07 12:05:45" (1/3) ... [2021-07-06 12:05:45,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43d1d677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.07 12:05:45, skipping insertion in model container [2021-07-06 12:05:45,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:05:45" (2/3) ... [2021-07-06 12:05:45,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43d1d677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.07 12:05:45, skipping insertion in model container [2021-07-06 12:05:45,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 12:05:45" (3/3) ... [2021-07-06 12:05:45,686 INFO L111 eAbstractionObserver]: Analyzing ICFG derefAfterFree1.c [2021-07-06 12:05:45,690 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-06 12:05:45,690 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-07-06 12:05:45,715 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == freePointerErr0ASSERT_VIOLATIONMEMORY_FREE ======== [2021-07-06 12:05:45,719 INFO L329 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 12:05:45,719 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 12:05:45,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 12 states have (on average 1.5) internal successors, (18), 18 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-07-06 12:05:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-07-06 12:05:45,731 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:05:45,731 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:05:45,731 INFO L374 AbstractCegarLoop]: === Iteration 1 === [freePointerErr0ASSERT_VIOLATIONMEMORY_FREE] === [2021-07-06 12:05:45,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:05:45,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1608321379, now seen corresponding path program 1 times [2021-07-06 12:05:45,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:05:45,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096316563] [2021-07-06 12:05:45,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:05:45,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:05:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:45,921 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:45,923 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:45,925 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:45,925 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 12:05:45,933 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:45,935 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 12:05:45,944 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:45,945 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 12:05:45,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:05:45,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:45,991 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:45,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 12:05:45,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:05:45,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096316563] [2021-07-06 12:05:45,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096316563] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:05:45,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:05:45,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-06 12:05:45,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236764065] [2021-07-06 12:05:46,000 INFO L425 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-06 12:05:46,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:05:46,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-06 12:05:46,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-06 12:05:46,014 INFO L87 Difference]: Start difference. First operand has 25 states, 12 states have (on average 1.5) internal successors, (18), 18 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:46,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:05:46,128 INFO L93 Difference]: Finished difference Result 24 states and 23 transitions. [2021-07-06 12:05:46,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-06 12:05:46,130 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-07-06 12:05:46,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:05:46,134 INFO L225 Difference]: With dead ends: 24 [2021-07-06 12:05:46,134 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 12:05:46,135 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-06 12:05:46,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 12:05:46,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 12:05:46,147 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) [2021-07-06 12:05:46,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 12:05:46,148 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2021-07-06 12:05:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:05:46,148 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 12:05:46,148 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:46,148 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 12:05:46,148 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 12:05:46,150 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-06 12:05:46,150 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 12:05:46,152 INFO L303 ceAbstractionStarter]: Result for error location freePointerErr0ASSERT_VIOLATIONMEMORY_FREE was SAFE (1/6) [2021-07-06 12:05:46,154 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == freePointerErr1ASSERT_VIOLATIONMEMORY_FREE ======== [2021-07-06 12:05:46,155 INFO L329 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 12:05:46,155 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 12:05:46,156 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 12 states have (on average 1.5) internal successors, (18), 18 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-07-06 12:05:46,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-06 12:05:46,156 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:05:46,157 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:05:46,157 INFO L374 AbstractCegarLoop]: === Iteration 1 === [freePointerErr1ASSERT_VIOLATIONMEMORY_FREE] === [2021-07-06 12:05:46,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:05:46,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1681644769, now seen corresponding path program 1 times [2021-07-06 12:05:46,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:05:46,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349074587] [2021-07-06 12:05:46,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:05:46,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:05:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:46,178 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:46,179 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:46,179 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:46,180 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 12:05:46,183 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:46,183 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 12:05:46,187 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:46,187 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 12:05:46,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:05:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:46,206 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:46,207 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:46,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 12:05:46,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:05:46,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349074587] [2021-07-06 12:05:46,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349074587] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:05:46,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:05:46,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-06 12:05:46,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980659509] [2021-07-06 12:05:46,210 INFO L425 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-06 12:05:46,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:05:46,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-06 12:05:46,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-06 12:05:46,212 INFO L87 Difference]: Start difference. First operand has 25 states, 12 states have (on average 1.5) internal successors, (18), 18 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:46,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:05:46,312 INFO L93 Difference]: Finished difference Result 24 states and 23 transitions. [2021-07-06 12:05:46,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-06 12:05:46,313 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-07-06 12:05:46,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:05:46,313 INFO L225 Difference]: With dead ends: 24 [2021-07-06 12:05:46,313 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 12:05:46,314 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-06 12:05:46,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 12:05:46,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 12:05:46,314 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) [2021-07-06 12:05:46,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 12:05:46,314 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2021-07-06 12:05:46,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:05:46,315 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 12:05:46,315 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:46,315 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 12:05:46,315 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 12:05:46,315 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-06 12:05:46,316 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 12:05:46,316 INFO L303 ceAbstractionStarter]: Result for error location freePointerErr1ASSERT_VIOLATIONMEMORY_FREE was SAFE (2/6) [2021-07-06 12:05:46,317 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == freePointerErr2ASSERT_VIOLATIONMEMORY_FREE ======== [2021-07-06 12:05:46,318 INFO L329 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 12:05:46,318 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 12:05:46,319 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 12 states have (on average 1.5) internal successors, (18), 18 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-07-06 12:05:46,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-06 12:05:46,319 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:05:46,320 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:05:46,320 INFO L374 AbstractCegarLoop]: === Iteration 1 === [freePointerErr2ASSERT_VIOLATIONMEMORY_FREE] === [2021-07-06 12:05:46,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:05:46,320 INFO L82 PathProgramCache]: Analyzing trace with hash -591380251, now seen corresponding path program 1 times [2021-07-06 12:05:46,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:05:46,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597962588] [2021-07-06 12:05:46,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:05:46,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:05:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:46,336 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:46,336 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:46,336 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:46,337 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 12:05:46,340 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:46,340 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 12:05:46,343 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:46,343 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 12:05:46,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:05:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:46,371 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:46,372 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 12:05:46,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:05:46,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597962588] [2021-07-06 12:05:46,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597962588] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:05:46,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:05:46,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-06 12:05:46,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227959103] [2021-07-06 12:05:46,373 INFO L425 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-06 12:05:46,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:05:46,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-06 12:05:46,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-06 12:05:46,374 INFO L87 Difference]: Start difference. First operand has 25 states, 12 states have (on average 1.5) internal successors, (18), 18 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:46,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:05:46,455 INFO L93 Difference]: Finished difference Result 24 states and 23 transitions. [2021-07-06 12:05:46,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-06 12:05:46,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-07-06 12:05:46,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:05:46,455 INFO L225 Difference]: With dead ends: 24 [2021-07-06 12:05:46,456 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 12:05:46,456 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-06 12:05:46,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 12:05:46,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 12:05:46,456 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) [2021-07-06 12:05:46,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 12:05:46,457 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-07-06 12:05:46,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:05:46,457 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 12:05:46,457 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:46,457 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 12:05:46,457 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 12:05:46,457 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-06 12:05:46,458 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 12:05:46,458 INFO L303 ceAbstractionStarter]: Result for error location freePointerErr2ASSERT_VIOLATIONMEMORY_FREE was SAFE (3/6) [2021-07-06 12:05:46,459 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr0REQUIRES_VIOLATION ======== [2021-07-06 12:05:46,459 INFO L329 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 12:05:46,460 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 12:05:46,460 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 12 states have (on average 1.5) internal successors, (18), 18 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-07-06 12:05:46,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-06 12:05:46,461 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:05:46,461 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:05:46,461 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr0REQUIRES_VIOLATION] === [2021-07-06 12:05:46,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:05:46,462 INFO L82 PathProgramCache]: Analyzing trace with hash 146827991, now seen corresponding path program 1 times [2021-07-06 12:05:46,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:05:46,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449081736] [2021-07-06 12:05:46,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:05:46,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:05:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-06 12:05:46,470 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-06 12:05:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-06 12:05:46,476 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-06 12:05:46,488 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-06 12:05:46,491 INFO L639 BasicCegarLoop]: Counterexample is feasible [2021-07-06 12:05:46,491 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-06 12:05:46,492 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 12:05:46,492 INFO L303 ceAbstractionStarter]: Result for error location mainErr0REQUIRES_VIOLATION was UNSAFE (4/6) [2021-07-06 12:05:46,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.07 12:05:46 BoogieIcfgContainer [2021-07-06 12:05:46,507 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-06 12:05:46,508 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-06 12:05:46,508 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-06 12:05:46,508 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-06 12:05:46,509 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 12:05:45" (3/4) ... [2021-07-06 12:05:46,510 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-07-06 12:05:46,538 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-07-06 12:05:46,538 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-06 12:05:46,539 INFO L168 Benchmark]: Toolchain (without parser) took 1326.57 ms. Allocated memory was 54.5 MB in the beginning and 86.0 MB in the end (delta: 31.5 MB). Free memory was 31.1 MB in the beginning and 61.0 MB in the end (delta: -29.9 MB). Peak memory consumption was 777.5 kB. Max. memory is 16.1 GB. [2021-07-06 12:05:46,539 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 54.5 MB. Free memory is still 35.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-07-06 12:05:46,539 INFO L168 Benchmark]: CACSL2BoogieTranslator took 160.51 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 30.8 MB in the beginning and 48.6 MB in the end (delta: -17.7 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2021-07-06 12:05:46,540 INFO L168 Benchmark]: Boogie Preprocessor took 51.34 ms. Allocated memory is still 69.2 MB. Free memory was 48.6 MB in the beginning and 52.6 MB in the end (delta: -4.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-06 12:05:46,540 INFO L168 Benchmark]: RCFGBuilder took 253.76 ms. Allocated memory is still 69.2 MB. Free memory was 52.6 MB in the beginning and 40.8 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-07-06 12:05:46,540 INFO L168 Benchmark]: TraceAbstraction took 825.07 ms. Allocated memory was 69.2 MB in the beginning and 86.0 MB in the end (delta: 16.8 MB). Free memory was 40.3 MB in the beginning and 62.6 MB in the end (delta: -22.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-06 12:05:46,540 INFO L168 Benchmark]: Witness Printer took 30.42 ms. Allocated memory is still 86.0 MB. Free memory was 62.6 MB in the beginning and 61.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-06 12:05:46,543 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 54.5 MB. Free memory is still 35.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 160.51 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 30.8 MB in the beginning and 48.6 MB in the end (delta: -17.7 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.34 ms. Allocated memory is still 69.2 MB. Free memory was 48.6 MB in the beginning and 52.6 MB in the end (delta: -4.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 253.76 ms. Allocated memory is still 69.2 MB. Free memory was 52.6 MB in the beginning and 40.8 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 825.07 ms. Allocated memory was 69.2 MB in the beginning and 86.0 MB in the end (delta: 16.8 MB). Free memory was 40.3 MB in the beginning and 62.6 MB in the end (delta: -22.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 30.42 ms. Allocated memory is still 86.0 MB. Free memory was 62.6 MB in the beginning and 61.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 6]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 6]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 6]: free always succeeds For all program executions holds that free always succeeds at this location - CounterExampleResult [Line: 14]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L10] int* p = malloc(10 * sizeof(int)); VAL [malloc(10 * sizeof(int))={2:0}, p={2:0}] [L12] CALL freePointer(p) VAL [p={2:0}] [L6] free(p) VAL [p={2:0}, p={2:0}] [L6] free(p) VAL [p={2:0}, p={2:0}] [L6] free(p) [L12] RET freePointer(p) VAL [malloc(10 * sizeof(int))={2:0}, p={2:0}] [L14] p[0] = 1 - StatisticsResult: Ultimate Automizer benchmark data for error location: freePointerErr0ASSERT_VIOLATIONMEMORY_FREE CFG has 4 procedures, 25 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 439.0ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 6.1ms, AutomataDifference: 133.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14 SDtfs, 22 SDslu, 32 SDs, 0 SdLazy, 37 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 47.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 76.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4.7ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.6ms SsaConstructionTime, 37.7ms SatisfiabilityAnalysisTime, 129.1ms InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 23 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 - StatisticsResult: Ultimate Automizer benchmark data for error location: freePointerErr1ASSERT_VIOLATIONMEMORY_FREE CFG has 4 procedures, 25 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 162.0ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.8ms, AutomataDifference: 103.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13 SDtfs, 21 SDslu, 25 SDs, 0 SdLazy, 45 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 39.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 65.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 0.6ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9ms SsaConstructionTime, 6.5ms SatisfiabilityAnalysisTime, 40.5ms InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 34 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 - StatisticsResult: Ultimate Automizer benchmark data for error location: freePointerErr2ASSERT_VIOLATIONMEMORY_FREE CFG has 4 procedures, 25 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 140.8ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.7ms, AutomataDifference: 82.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 15 SDtfs, 15 SDslu, 28 SDs, 0 SdLazy, 47 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 34.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 0.5ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7ms SsaConstructionTime, 4.7ms SatisfiabilityAnalysisTime, 44.0ms InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 39 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0REQUIRES_VIOLATION CFG has 4 procedures, 25 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 33.0ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.6ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7ms SsaConstructionTime, 6.2ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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! [2021-07-06 12:05:46,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...