./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext3/realloc1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b 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/realloc1.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 ac04f74b68086890b55eca7e645e90e8df8a67932fce57d15e9ba2378d355360 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 19:54:12,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 19:54:12,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 19:54:12,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 19:54:12,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 19:54:12,812 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 19:54:12,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 19:54:12,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 19:54:12,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 19:54:12,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 19:54:12,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 19:54:12,825 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 19:54:12,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 19:54:12,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 19:54:12,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 19:54:12,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 19:54:12,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 19:54:12,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 19:54:12,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 19:54:12,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 19:54:12,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 19:54:12,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 19:54:12,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 19:54:12,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 19:54:12,849 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 19:54:12,850 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 19:54:12,850 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 19:54:12,851 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 19:54:12,852 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 19:54:12,852 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 19:54:12,853 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 19:54:12,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 19:54:12,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 19:54:12,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 19:54:12,856 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 19:54:12,856 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 19:54:12,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 19:54:12,857 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 19:54:12,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 19:54:12,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 19:54:12,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 19:54:12,858 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-14 19:54:12,886 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 19:54:12,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 19:54:12,887 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 19:54:12,887 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 19:54:12,887 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 19:54:12,887 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 19:54:12,888 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 19:54:12,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 19:54:12,888 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 19:54:12,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 19:54:12,888 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 19:54:12,888 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 19:54:12,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 19:54:12,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 19:54:12,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 19:54:12,888 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 19:54:12,889 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 19:54:12,889 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 19:54:12,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 19:54:12,889 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 19:54:12,889 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 19:54:12,889 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 19:54:12,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 19:54:12,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 19:54:12,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 19:54:12,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:54:12,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 19:54:12,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 19:54:12,890 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 19:54:12,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 19:54:12,890 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 19:54:12,890 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac04f74b68086890b55eca7e645e90e8df8a67932fce57d15e9ba2378d355360 [2021-12-14 19:54:13,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 19:54:13,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 19:54:13,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 19:54:13,132 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 19:54:13,133 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 19:54:13,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext3/realloc1.c [2021-12-14 19:54:13,178 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d91a22e31/0b31855d87c441c69e44f98f2d468b14/FLAGf85d4d6d6 [2021-12-14 19:54:13,569 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 19:54:13,570 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/realloc1.c [2021-12-14 19:54:13,576 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d91a22e31/0b31855d87c441c69e44f98f2d468b14/FLAGf85d4d6d6 [2021-12-14 19:54:13,597 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d91a22e31/0b31855d87c441c69e44f98f2d468b14 [2021-12-14 19:54:13,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 19:54:13,601 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 19:54:13,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 19:54:13,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 19:54:13,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 19:54:13,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:54:13" (1/1) ... [2021-12-14 19:54:13,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fef4d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:13, skipping insertion in model container [2021-12-14 19:54:13,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:54:13" (1/1) ... [2021-12-14 19:54:13,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 19:54:13,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:54:13,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:54:13,802 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 19:54:13,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:54:13,819 INFO L208 MainTranslator]: Completed translation [2021-12-14 19:54:13,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:13 WrapperNode [2021-12-14 19:54:13,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 19:54:13,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 19:54:13,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 19:54:13,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 19:54:13,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:13" (1/1) ... [2021-12-14 19:54:13,830 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:13" (1/1) ... [2021-12-14 19:54:13,844 INFO L137 Inliner]: procedures = 12, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2021-12-14 19:54:13,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 19:54:13,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 19:54:13,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 19:54:13,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 19:54:13,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:13" (1/1) ... [2021-12-14 19:54:13,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:13" (1/1) ... [2021-12-14 19:54:13,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:13" (1/1) ... [2021-12-14 19:54:13,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:13" (1/1) ... [2021-12-14 19:54:13,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:13" (1/1) ... [2021-12-14 19:54:13,861 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:13" (1/1) ... [2021-12-14 19:54:13,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:13" (1/1) ... [2021-12-14 19:54:13,864 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 19:54:13,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 19:54:13,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 19:54:13,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 19:54:13,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:13" (1/1) ... [2021-12-14 19:54:13,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:54:13,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:13,904 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) [2021-12-14 19:54:13,910 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 [2021-12-14 19:54:13,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 19:54:13,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 19:54:13,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 19:54:13,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 19:54:13,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 19:54:13,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 19:54:14,007 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 19:54:14,008 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 19:54:14,132 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 19:54:14,136 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 19:54:14,136 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 19:54:14,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:54:14 BoogieIcfgContainer [2021-12-14 19:54:14,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 19:54:14,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 19:54:14,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 19:54:14,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 19:54:14,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:54:13" (1/3) ... [2021-12-14 19:54:14,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342906ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:54:14, skipping insertion in model container [2021-12-14 19:54:14,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:13" (2/3) ... [2021-12-14 19:54:14,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342906ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:54:14, skipping insertion in model container [2021-12-14 19:54:14,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:54:14" (3/3) ... [2021-12-14 19:54:14,143 INFO L111 eAbstractionObserver]: Analyzing ICFG realloc1.c [2021-12-14 19:54:14,146 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 19:54:14,147 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-12-14 19:54:14,173 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 19:54:14,178 INFO L339 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 19:54:14,178 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-12-14 19:54:14,187 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.75) internal successors, (28), 24 states have internal predecessors, (28), 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) [2021-12-14 19:54:14,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-14 19:54:14,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:14,192 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-14 19:54:14,192 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-12-14 19:54:14,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:14,196 INFO L85 PathProgramCache]: Analyzing trace with hash 926021, now seen corresponding path program 1 times [2021-12-14 19:54:14,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:14,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285198492] [2021-12-14 19:54:14,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:14,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:14,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:14,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:14,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285198492] [2021-12-14 19:54:14,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285198492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:54:14,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:54:14,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:54:14,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296625421] [2021-12-14 19:54:14,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:54:14,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 19:54:14,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:14,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 19:54:14,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 19:54:14,327 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.75) internal successors, (28), 24 states have internal predecessors, (28), 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 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2021-12-14 19:54:14,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:14,336 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-12-14 19:54:14,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 19:54:14,338 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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 [2021-12-14 19:54:14,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:14,342 INFO L225 Difference]: With dead ends: 25 [2021-12-14 19:54:14,342 INFO L226 Difference]: Without dead ends: 23 [2021-12-14 19:54:14,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 19:54:14,346 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:14,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:54:14,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-14 19:54:14,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-14 19:54:14,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 22 states have internal predecessors, (25), 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) [2021-12-14 19:54:14,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-12-14 19:54:14,369 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 4 [2021-12-14 19:54:14,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:14,369 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-12-14 19:54:14,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2021-12-14 19:54:14,370 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-12-14 19:54:14,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-14 19:54:14,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:14,370 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-14 19:54:14,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 19:54:14,370 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-12-14 19:54:14,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:14,371 INFO L85 PathProgramCache]: Analyzing trace with hash 925711, now seen corresponding path program 1 times [2021-12-14 19:54:14,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:14,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461340259] [2021-12-14 19:54:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:14,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:14,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:14,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461340259] [2021-12-14 19:54:14,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461340259] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:54:14,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:54:14,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:54:14,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539483020] [2021-12-14 19:54:14,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:54:14,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:54:14,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:14,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:54:14,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:54:14,405 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. 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) [2021-12-14 19:54:14,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:14,426 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-12-14 19:54:14,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:54:14,427 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 [2021-12-14 19:54:14,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:14,427 INFO L225 Difference]: With dead ends: 29 [2021-12-14 19:54:14,427 INFO L226 Difference]: Without dead ends: 29 [2021-12-14 19:54:14,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:54:14,429 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:14,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 40 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:54:14,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-14 19:54:14,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2021-12-14 19:54:14,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.625) internal successors, (26), 23 states have internal predecessors, (26), 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) [2021-12-14 19:54:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-12-14 19:54:14,432 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 4 [2021-12-14 19:54:14,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:14,433 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-12-14 19:54:14,433 INFO L471 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) [2021-12-14 19:54:14,433 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-12-14 19:54:14,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-14 19:54:14,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:14,433 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-14 19:54:14,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 19:54:14,434 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-12-14 19:54:14,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:14,434 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-12-14 19:54:14,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:14,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292795627] [2021-12-14 19:54:14,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:14,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:14,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:14,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292795627] [2021-12-14 19:54:14,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292795627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:54:14,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:54:14,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:54:14,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601096184] [2021-12-14 19:54:14,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:54:14,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:54:14,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:14,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:54:14,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:54:14,468 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 3 states, 2 states have (on average 2.0) 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) [2021-12-14 19:54:14,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:14,495 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-12-14 19:54:14,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:54:14,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) 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 [2021-12-14 19:54:14,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:14,496 INFO L225 Difference]: With dead ends: 26 [2021-12-14 19:54:14,497 INFO L226 Difference]: Without dead ends: 26 [2021-12-14 19:54:14,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:54:14,499 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:14,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 15 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:54:14,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-14 19:54:14,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2021-12-14 19:54:14,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.5) internal successors, (24), 21 states have internal predecessors, (24), 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) [2021-12-14 19:54:14,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-12-14 19:54:14,506 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 4 [2021-12-14 19:54:14,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:14,507 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-12-14 19:54:14,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) 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) [2021-12-14 19:54:14,507 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-12-14 19:54:14,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-14 19:54:14,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:14,508 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-14 19:54:14,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 19:54:14,508 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-12-14 19:54:14,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:14,509 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2021-12-14 19:54:14,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:14,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698369567] [2021-12-14 19:54:14,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:14,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:14,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:14,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698369567] [2021-12-14 19:54:14,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698369567] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:54:14,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:54:14,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:54:14,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343430916] [2021-12-14 19:54:14,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:54:14,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:54:14,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:14,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:54:14,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:54:14,568 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 3 states, 2 states have (on average 2.0) 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) [2021-12-14 19:54:14,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:14,598 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-12-14 19:54:14,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:54:14,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) 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 [2021-12-14 19:54:14,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:14,601 INFO L225 Difference]: With dead ends: 25 [2021-12-14 19:54:14,601 INFO L226 Difference]: Without dead ends: 25 [2021-12-14 19:54:14,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:54:14,604 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:14,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:54:14,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-14 19:54:14,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2021-12-14 19:54:14,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 22 states have internal predecessors, (25), 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) [2021-12-14 19:54:14,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-12-14 19:54:14,611 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 4 [2021-12-14 19:54:14,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:14,612 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-12-14 19:54:14,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) 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) [2021-12-14 19:54:14,613 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-12-14 19:54:14,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 19:54:14,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:14,614 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:54:14,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 19:54:14,614 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-12-14 19:54:14,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:14,615 INFO L85 PathProgramCache]: Analyzing trace with hash 264435858, now seen corresponding path program 1 times [2021-12-14 19:54:14,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:14,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555010980] [2021-12-14 19:54:14,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:14,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:14,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:14,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555010980] [2021-12-14 19:54:14,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555010980] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:14,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924915123] [2021-12-14 19:54:14,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:14,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:14,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:14,665 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:54:14,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 19:54:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:14,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 19:54:14,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:54:14,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:54:14,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924915123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:54:14,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 19:54:14,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-12-14 19:54:14,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816935686] [2021-12-14 19:54:14,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:54:14,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:54:14,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:14,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:54:14,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:54:14,737 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-12-14 19:54:14,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:14,753 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-12-14 19:54:14,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:54:14,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2021-12-14 19:54:14,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:14,755 INFO L225 Difference]: With dead ends: 25 [2021-12-14 19:54:14,755 INFO L226 Difference]: Without dead ends: 25 [2021-12-14 19:54:14,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:54:14,757 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:14,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 19 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:54:14,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-14 19:54:14,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-12-14 19:54:14,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 21 states have internal predecessors, (24), 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) [2021-12-14 19:54:14,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-12-14 19:54:14,767 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 8 [2021-12-14 19:54:14,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:14,768 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-12-14 19:54:14,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-12-14 19:54:14,770 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-12-14 19:54:14,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 19:54:14,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:14,771 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-12-14 19:54:14,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 19:54:14,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:14,989 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-12-14 19:54:14,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:14,989 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2021-12-14 19:54:14,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:14,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499896757] [2021-12-14 19:54:14,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:14,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:15,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:15,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499896757] [2021-12-14 19:54:15,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499896757] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:15,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809322535] [2021-12-14 19:54:15,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:15,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:15,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:15,089 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:54:15,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 19:54:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:15,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 19:54:15,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:15,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 19:54:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:15,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:15,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:15,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809322535] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:54:15,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:54:15,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2021-12-14 19:54:15,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514092398] [2021-12-14 19:54:15,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:15,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 19:54:15,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:15,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 19:54:15,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:54:15,352 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 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) [2021-12-14 19:54:15,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:15,441 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-12-14 19:54:15,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:54:15,442 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 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 8 [2021-12-14 19:54:15,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:15,442 INFO L225 Difference]: With dead ends: 30 [2021-12-14 19:54:15,442 INFO L226 Difference]: Without dead ends: 30 [2021-12-14 19:54:15,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:54:15,445 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 52 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:15,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 30 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:54:15,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-14 19:54:15,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-12-14 19:54:15,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 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) [2021-12-14 19:54:15,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-12-14 19:54:15,451 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 8 [2021-12-14 19:54:15,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:15,452 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-12-14 19:54:15,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 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) [2021-12-14 19:54:15,453 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-12-14 19:54:15,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 19:54:15,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:15,454 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1] [2021-12-14 19:54:15,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:15,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-14 19:54:15,668 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-12-14 19:54:15,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:15,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1401693725, now seen corresponding path program 1 times [2021-12-14 19:54:15,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:15,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375166579] [2021-12-14 19:54:15,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:15,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:15,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:15,707 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 19:54:15,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:15,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375166579] [2021-12-14 19:54:15,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375166579] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:54:15,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:54:15,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:54:15,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971045629] [2021-12-14 19:54:15,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:54:15,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:54:15,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:15,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:54:15,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:54:15,710 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-12-14 19:54:15,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:15,722 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-12-14 19:54:15,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:54:15,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 17 [2021-12-14 19:54:15,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:15,724 INFO L225 Difference]: With dead ends: 29 [2021-12-14 19:54:15,724 INFO L226 Difference]: Without dead ends: 29 [2021-12-14 19:54:15,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:54:15,725 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:15,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 13 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:54:15,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-14 19:54:15,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-12-14 19:54:15,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 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) [2021-12-14 19:54:15,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-12-14 19:54:15,729 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 17 [2021-12-14 19:54:15,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:15,729 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-12-14 19:54:15,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-12-14 19:54:15,730 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-12-14 19:54:15,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 19:54:15,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:15,730 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:54:15,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 19:54:15,731 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-12-14 19:54:15,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:15,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1592059456, now seen corresponding path program 1 times [2021-12-14 19:54:15,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:15,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80956915] [2021-12-14 19:54:15,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:15,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:15,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:15,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80956915] [2021-12-14 19:54:15,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80956915] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:15,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159015836] [2021-12-14 19:54:15,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:15,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:15,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:15,790 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:54:15,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 19:54:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:15,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 19:54:15,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:15,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:15,927 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:15,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159015836] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:54:15,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:54:15,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-14 19:54:15,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586664322] [2021-12-14 19:54:15,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:15,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 19:54:15,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:15,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 19:54:15,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:54:15,929 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 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) [2021-12-14 19:54:15,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:15,958 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-12-14 19:54:15,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:54:15,958 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 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 19 [2021-12-14 19:54:15,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:15,959 INFO L225 Difference]: With dead ends: 46 [2021-12-14 19:54:15,959 INFO L226 Difference]: Without dead ends: 46 [2021-12-14 19:54:15,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:54:15,959 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 36 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:15,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 49 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:54:15,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-14 19:54:15,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-14 19:54:15,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 45 states have internal predecessors, (48), 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) [2021-12-14 19:54:15,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-12-14 19:54:15,962 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 19 [2021-12-14 19:54:15,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:15,962 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-12-14 19:54:15,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 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) [2021-12-14 19:54:15,963 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-12-14 19:54:15,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 19:54:15,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:15,963 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:54:15,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:16,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:16,172 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-12-14 19:54:16,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:16,172 INFO L85 PathProgramCache]: Analyzing trace with hash 415018577, now seen corresponding path program 2 times [2021-12-14 19:54:16,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:16,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030135876] [2021-12-14 19:54:16,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:16,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:16,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:16,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030135876] [2021-12-14 19:54:16,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030135876] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:16,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822323054] [2021-12-14 19:54:16,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:54:16,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:16,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:16,269 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:54:16,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 19:54:16,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:54:16,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:54:16,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 19:54:16,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:16,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:16,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822323054] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:54:16,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:54:16,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2021-12-14 19:54:16,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800054407] [2021-12-14 19:54:16,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:16,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 19:54:16,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:16,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 19:54:16,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:54:16,484 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 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) [2021-12-14 19:54:16,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:16,514 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2021-12-14 19:54:16,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 19:54:16,516 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 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 39 [2021-12-14 19:54:16,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:16,516 INFO L225 Difference]: With dead ends: 54 [2021-12-14 19:54:16,516 INFO L226 Difference]: Without dead ends: 54 [2021-12-14 19:54:16,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:54:16,517 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:16,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 65 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:54:16,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-14 19:54:16,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-12-14 19:54:16,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 53 states have internal predecessors, (56), 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) [2021-12-14 19:54:16,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-12-14 19:54:16,519 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 39 [2021-12-14 19:54:16,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:16,519 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-12-14 19:54:16,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 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) [2021-12-14 19:54:16,519 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-12-14 19:54:16,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-14 19:54:16,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:16,520 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:54:16,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:16,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:16,721 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2021-12-14 19:54:16,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:16,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1707940107, now seen corresponding path program 3 times [2021-12-14 19:54:16,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:16,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288983388] [2021-12-14 19:54:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:16,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 19:54:16,773 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 19:54:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 19:54:16,808 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 19:54:16,808 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-14 19:54:16,809 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (7 of 8 remaining) [2021-12-14 19:54:16,810 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (6 of 8 remaining) [2021-12-14 19:54:16,810 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (5 of 8 remaining) [2021-12-14 19:54:16,810 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (4 of 8 remaining) [2021-12-14 19:54:16,810 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE (3 of 8 remaining) [2021-12-14 19:54:16,810 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE (2 of 8 remaining) [2021-12-14 19:54:16,811 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (1 of 8 remaining) [2021-12-14 19:54:16,811 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2021-12-14 19:54:16,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 19:54:16,813 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:54:16,815 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-14 19:54:16,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 07:54:16 BoogieIcfgContainer [2021-12-14 19:54:16,835 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-14 19:54:16,836 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-14 19:54:16,836 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-14 19:54:16,836 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-14 19:54:16,836 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:54:14" (3/4) ... [2021-12-14 19:54:16,838 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-14 19:54:16,871 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-14 19:54:16,872 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-14 19:54:16,872 INFO L158 Benchmark]: Toolchain (without parser) took 3271.13ms. Allocated memory was 94.4MB in the beginning and 119.5MB in the end (delta: 25.2MB). Free memory was 59.0MB in the beginning and 60.1MB in the end (delta: -1.1MB). Peak memory consumption was 25.4MB. Max. memory is 16.1GB. [2021-12-14 19:54:16,873 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 94.4MB. Free memory was 75.4MB in the beginning and 75.4MB in the end (delta: 46.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 19:54:16,873 INFO L158 Benchmark]: CACSL2BoogieTranslator took 217.83ms. Allocated memory is still 94.4MB. Free memory was 58.8MB in the beginning and 71.8MB in the end (delta: -13.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-14 19:54:16,873 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.41ms. Allocated memory is still 94.4MB. Free memory was 71.5MB in the beginning and 70.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 19:54:16,873 INFO L158 Benchmark]: Boogie Preprocessor took 18.10ms. Allocated memory is still 94.4MB. Free memory was 70.1MB in the beginning and 69.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 19:54:16,874 INFO L158 Benchmark]: RCFGBuilder took 273.33ms. Allocated memory is still 94.4MB. Free memory was 69.0MB in the beginning and 58.7MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-14 19:54:16,874 INFO L158 Benchmark]: TraceAbstraction took 2696.61ms. Allocated memory was 94.4MB in the beginning and 119.5MB in the end (delta: 25.2MB). Free memory was 58.3MB in the beginning and 63.1MB in the end (delta: -4.8MB). Peak memory consumption was 23.7MB. Max. memory is 16.1GB. [2021-12-14 19:54:16,874 INFO L158 Benchmark]: Witness Printer took 36.25ms. Allocated memory is still 119.5MB. Free memory was 63.1MB in the beginning and 60.1MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 19:54:16,875 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 94.4MB. Free memory was 75.4MB in the beginning and 75.4MB in the end (delta: 46.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 217.83ms. Allocated memory is still 94.4MB. Free memory was 58.8MB in the beginning and 71.8MB in the end (delta: -13.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.41ms. Allocated memory is still 94.4MB. Free memory was 71.5MB in the beginning and 70.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.10ms. Allocated memory is still 94.4MB. Free memory was 70.1MB in the beginning and 69.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 273.33ms. Allocated memory is still 94.4MB. Free memory was 69.0MB in the beginning and 58.7MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 2696.61ms. Allocated memory was 94.4MB in the beginning and 119.5MB in the end (delta: 25.2MB). Free memory was 58.3MB in the beginning and 63.1MB in the end (delta: -4.8MB). Peak memory consumption was 23.7MB. Max. memory is 16.1GB. * Witness Printer took 36.25ms. Allocated memory is still 119.5MB. Free memory was 63.1MB in the beginning and 60.1MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L8] char* p = malloc(10 * sizeof(int)); [L10] int i = 0; VAL [i=0, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-2, i=0, p={-1:0}] [L10] i++ VAL [i=1, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-3, i=1, p={-1:0}] [L10] i++ VAL [i=2, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-4, i=2, p={-1:0}] [L10] i++ VAL [i=3, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-5, i=3, p={-1:0}] [L10] i++ VAL [i=4, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-6, i=4, p={-1:0}] [L10] i++ VAL [i=5, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-7, i=5, p={-1:0}] [L10] i++ VAL [i=6, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-8, i=6, p={-1:0}] [L10] i++ VAL [i=7, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-9, i=7, p={-1:0}] [L10] i++ VAL [i=8, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=10, i=8, p={-1:0}] [L10] i++ VAL [i=9, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-10, i=9, p={-1:0}] [L10] i++ VAL [i=10, p={-1:0}] [L10] COND FALSE !(i < 10) VAL [i=10, p={-1:0}] [L14] free(p) VAL [i=10, p={-1:0}] [L14] free(p) VAL [i=10, p={-1:0}] [L14] free(p) [L16] p[2] - UnprovableResult [Line: 11]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 11]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 16]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 7]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 2.6s, OverallIterations: 10, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 162 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 162 mSDsluCounter, 283 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 134 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 189 IncrementalHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 149 mSDtfsCounter, 189 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 171 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=9, InterpolantAutomatonStates: 45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 20 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 228 NumberOfCodeBlocks, 228 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 231 ConstructedInterpolants, 0 QuantifiedInterpolants, 808 SizeOfPredicates, 0 NumberOfNonLiveVariables, 302 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 16 InterpolantComputations, 6 PerfectInterpolantSequences, 16/428 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! [2021-12-14 19:54:16,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)