./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/realloc1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer --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 937cfa07aecfb3a07a3e6e685c2e5e481fbe44b8 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:02:20,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:02:20,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:02:21,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:02:21,032 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:02:21,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:02:21,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:02:21,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:02:21,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:02:21,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:02:21,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:02:21,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:02:21,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:02:21,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:02:21,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:02:21,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:02:21,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:02:21,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:02:21,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:02:21,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:02:21,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:02:21,091 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:02:21,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:02:21,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:02:21,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:02:21,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:02:21,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:02:21,108 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:02:21,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:02:21,111 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:02:21,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:02:21,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:02:21,114 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:02:21,116 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:02:21,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:02:21,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:02:21,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:02:21,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:02:21,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:02:21,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:02:21,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:02:21,125 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-28 03:02:21,166 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:02:21,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:02:21,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:02:21,168 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:02:21,168 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:02:21,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:02:21,169 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:02:21,169 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:02:21,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:02:21,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:02:21,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:02:21,171 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 03:02:21,171 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 03:02:21,171 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 03:02:21,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:02:21,171 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 03:02:21,172 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:02:21,172 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:02:21,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:02:21,172 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:02:21,172 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:02:21,173 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:02:21,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:02:21,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:02:21,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:02:21,173 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:02:21,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:02:21,174 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:02:21,174 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:/tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 937cfa07aecfb3a07a3e6e685c2e5e481fbe44b8 [2020-11-28 03:02:21,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:02:21,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:02:21,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:02:21,549 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:02:21,550 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:02:21,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer/../../sv-benchmarks/c/memsafety-ext3/realloc1.c [2020-11-28 03:02:21,652 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer/data/91f606ec8/c028ff00050c43369602939d2f5ec829/FLAG3f6d180b2 [2020-11-28 03:02:22,087 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:02:22,088 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/sv-benchmarks/c/memsafety-ext3/realloc1.c [2020-11-28 03:02:22,094 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer/data/91f606ec8/c028ff00050c43369602939d2f5ec829/FLAG3f6d180b2 [2020-11-28 03:02:22,464 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer/data/91f606ec8/c028ff00050c43369602939d2f5ec829 [2020-11-28 03:02:22,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:02:22,469 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-28 03:02:22,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:02:22,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:02:22,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:02:22,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:02:22" (1/1) ... [2020-11-28 03:02:22,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33b68934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:22, skipping insertion in model container [2020-11-28 03:02:22,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:02:22" (1/1) ... [2020-11-28 03:02:22,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:02:22,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:02:22,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:02:22,766 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:02:22,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:02:22,806 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:02:22,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:22 WrapperNode [2020-11-28 03:02:22,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:02:22,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:02:22,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:02:22,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:02:22,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:22" (1/1) ... [2020-11-28 03:02:22,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:22" (1/1) ... [2020-11-28 03:02:22,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:22" (1/1) ... [2020-11-28 03:02:22,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:22" (1/1) ... [2020-11-28 03:02:22,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:22" (1/1) ... [2020-11-28 03:02:22,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:22" (1/1) ... [2020-11-28 03:02:22,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:22" (1/1) ... [2020-11-28 03:02:22,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:02:22,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:02:22,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:02:22,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:02:22,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:02:22,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-28 03:02:22,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:02:22,968 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-28 03:02:22,969 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_realloc [2020-11-28 03:02:22,969 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-28 03:02:22,969 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-28 03:02:22,969 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-28 03:02:22,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-28 03:02:22,970 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-28 03:02:22,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 03:02:22,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_realloc [2020-11-28 03:02:22,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:02:22,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:02:22,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:02:22,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-28 03:02:22,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:02:23,286 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:02:23,286 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-28 03:02:23,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:02:23 BoogieIcfgContainer [2020-11-28 03:02:23,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:02:23,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:02:23,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:02:23,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:02:23,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:02:22" (1/3) ... [2020-11-28 03:02:23,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e0cf620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:02:23, skipping insertion in model container [2020-11-28 03:02:23,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:22" (2/3) ... [2020-11-28 03:02:23,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e0cf620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:02:23, skipping insertion in model container [2020-11-28 03:02:23,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:02:23" (3/3) ... [2020-11-28 03:02:23,312 INFO L111 eAbstractionObserver]: Analyzing ICFG realloc1.c [2020-11-28 03:02:23,324 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:02:23,343 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-11-28 03:02:23,376 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-11-28 03:02:23,402 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:02:23,402 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 03:02:23,402 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:02:23,402 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:02:23,403 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:02:23,403 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:02:23,403 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:02:23,403 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:02:23,424 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-11-28 03:02:23,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 03:02:23,435 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:23,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:23,439 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-11-28 03:02:23,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:23,446 INFO L82 PathProgramCache]: Analyzing trace with hash 604141221, now seen corresponding path program 1 times [2020-11-28 03:02:23,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:23,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786343685] [2020-11-28 03:02:23,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:23,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:02:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:23,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786343685] [2020-11-28 03:02:23,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:02:23,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:02:23,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160088510] [2020-11-28 03:02:23,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:02:23,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:23,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:02:23,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:02:23,747 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-11-28 03:02:23,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:23,932 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-11-28 03:02:23,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:02:23,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-28 03:02:23,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:23,956 INFO L225 Difference]: With dead ends: 39 [2020-11-28 03:02:23,956 INFO L226 Difference]: Without dead ends: 36 [2020-11-28 03:02:23,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:02:23,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-28 03:02:24,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2020-11-28 03:02:24,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-28 03:02:24,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-11-28 03:02:24,007 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 8 [2020-11-28 03:02:24,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:24,007 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-11-28 03:02:24,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:02:24,007 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-11-28 03:02:24,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 03:02:24,008 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:24,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:24,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:02:24,009 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-11-28 03:02:24,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:24,010 INFO L82 PathProgramCache]: Analyzing trace with hash 604141275, now seen corresponding path program 1 times [2020-11-28 03:02:24,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:24,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007814820] [2020-11-28 03:02:24,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:24,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:02:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:24,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:24,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007814820] [2020-11-28 03:02:24,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:02:24,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:02:24,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241238365] [2020-11-28 03:02:24,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:02:24,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:24,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:02:24,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:02:24,141 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2020-11-28 03:02:24,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:24,261 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-11-28 03:02:24,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:02:24,262 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-28 03:02:24,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:24,263 INFO L225 Difference]: With dead ends: 32 [2020-11-28 03:02:24,263 INFO L226 Difference]: Without dead ends: 32 [2020-11-28 03:02:24,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:02:24,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-28 03:02:24,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-11-28 03:02:24,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-28 03:02:24,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-11-28 03:02:24,271 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 8 [2020-11-28 03:02:24,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:24,271 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-11-28 03:02:24,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:02:24,272 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-11-28 03:02:24,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 03:02:24,272 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:24,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:24,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:02:24,273 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-11-28 03:02:24,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:24,274 INFO L82 PathProgramCache]: Analyzing trace with hash 604141276, now seen corresponding path program 1 times [2020-11-28 03:02:24,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:24,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136853575] [2020-11-28 03:02:24,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:24,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:02:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:24,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136853575] [2020-11-28 03:02:24,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:02:24,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:02:24,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106651966] [2020-11-28 03:02:24,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:02:24,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:24,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:02:24,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:02:24,379 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 4 states. [2020-11-28 03:02:24,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:24,472 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-11-28 03:02:24,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:02:24,474 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-28 03:02:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:24,475 INFO L225 Difference]: With dead ends: 32 [2020-11-28 03:02:24,476 INFO L226 Difference]: Without dead ends: 32 [2020-11-28 03:02:24,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:02:24,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-28 03:02:24,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-11-28 03:02:24,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-28 03:02:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-11-28 03:02:24,482 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 8 [2020-11-28 03:02:24,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:24,482 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-11-28 03:02:24,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:02:24,483 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-11-28 03:02:24,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 03:02:24,483 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:24,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:24,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:02:24,484 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-11-28 03:02:24,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:24,485 INFO L82 PathProgramCache]: Analyzing trace with hash -572402136, now seen corresponding path program 1 times [2020-11-28 03:02:24,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:24,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252574946] [2020-11-28 03:02:24,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:24,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:02:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:02:24,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252574946] [2020-11-28 03:02:24,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:02:24,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:02:24,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090569102] [2020-11-28 03:02:24,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:02:24,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:24,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:02:24,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:02:24,582 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 4 states. [2020-11-28 03:02:24,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:24,668 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-11-28 03:02:24,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:02:24,669 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-28 03:02:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:24,670 INFO L225 Difference]: With dead ends: 32 [2020-11-28 03:02:24,671 INFO L226 Difference]: Without dead ends: 32 [2020-11-28 03:02:24,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:02:24,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-28 03:02:24,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-11-28 03:02:24,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-28 03:02:24,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-11-28 03:02:24,676 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 12 [2020-11-28 03:02:24,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:24,677 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-11-28 03:02:24,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:02:24,677 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-11-28 03:02:24,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 03:02:24,678 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:24,678 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:24,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:02:24,678 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-11-28 03:02:24,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:24,681 INFO L82 PathProgramCache]: Analyzing trace with hash -572402081, now seen corresponding path program 1 times [2020-11-28 03:02:24,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:24,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572222895] [2020-11-28 03:02:24,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:24,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:02:24,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:24,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572222895] [2020-11-28 03:02:24,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017647805] [2020-11-28 03:02:24,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:24,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 03:02:24,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:02:25,021 INFO L384 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 [2020-11-28 03:02:25,022 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:02:25,031 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:02:25,032 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:02:25,032 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-28 03:02:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:25,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:02:25,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2020-11-28 03:02:25,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42891651] [2020-11-28 03:02:25,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:02:25,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:25,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:02:25,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:02:25,070 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 7 states. [2020-11-28 03:02:25,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:25,215 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-11-28 03:02:25,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:02:25,216 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-11-28 03:02:25,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:25,217 INFO L225 Difference]: With dead ends: 37 [2020-11-28 03:02:25,217 INFO L226 Difference]: Without dead ends: 37 [2020-11-28 03:02:25,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:02:25,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-28 03:02:25,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-11-28 03:02:25,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-28 03:02:25,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-11-28 03:02:25,223 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 12 [2020-11-28 03:02:25,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:25,224 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-11-28 03:02:25,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:02:25,224 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-11-28 03:02:25,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 03:02:25,225 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:25,225 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:25,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:25,426 INFO L429 AbstractCegarLoop]: === Iteration 6 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-11-28 03:02:25,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:25,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1487393457, now seen corresponding path program 1 times [2020-11-28 03:02:25,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:25,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899106180] [2020-11-28 03:02:25,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:25,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:02:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:25,562 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:25,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899106180] [2020-11-28 03:02:25,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977817225] [2020-11-28 03:02:25,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:25,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:25,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 03:02:25,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:02:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:25,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:02:25,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-11-28 03:02:25,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115778359] [2020-11-28 03:02:25,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:02:25,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:25,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:02:25,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:02:25,696 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 8 states. [2020-11-28 03:02:25,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:25,792 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-11-28 03:02:25,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:02:25,793 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-11-28 03:02:25,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:25,794 INFO L225 Difference]: With dead ends: 41 [2020-11-28 03:02:25,794 INFO L226 Difference]: Without dead ends: 41 [2020-11-28 03:02:25,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:02:25,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-28 03:02:25,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-11-28 03:02:25,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-28 03:02:25,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-11-28 03:02:25,801 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 21 [2020-11-28 03:02:25,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:25,801 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-11-28 03:02:25,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:02:25,801 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-11-28 03:02:25,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 03:02:25,802 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:25,802 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:26,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:26,003 INFO L429 AbstractCegarLoop]: === Iteration 7 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-11-28 03:02:26,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:26,004 INFO L82 PathProgramCache]: Analyzing trace with hash 304700076, now seen corresponding path program 2 times [2020-11-28 03:02:26,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:26,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407326641] [2020-11-28 03:02:26,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:26,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:02:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:26,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407326641] [2020-11-28 03:02:26,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216634325] [2020-11-28 03:02:26,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:26,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-28 03:02:26,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:02:26,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 03:02:26,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:02:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-11-28 03:02:26,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:02:26,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2020-11-28 03:02:26,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519945225] [2020-11-28 03:02:26,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 03:02:26,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:26,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 03:02:26,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:02:26,259 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 3 states. [2020-11-28 03:02:26,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:26,286 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-11-28 03:02:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 03:02:26,286 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-11-28 03:02:26,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:26,288 INFO L225 Difference]: With dead ends: 40 [2020-11-28 03:02:26,288 INFO L226 Difference]: Without dead ends: 40 [2020-11-28 03:02:26,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:02:26,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-28 03:02:26,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-11-28 03:02:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-28 03:02:26,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-11-28 03:02:26,299 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 25 [2020-11-28 03:02:26,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:26,300 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-11-28 03:02:26,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 03:02:26,301 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-11-28 03:02:26,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 03:02:26,302 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:26,302 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:26,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:26,508 INFO L429 AbstractCegarLoop]: === Iteration 8 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-11-28 03:02:26,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:26,509 INFO L82 PathProgramCache]: Analyzing trace with hash 758998927, now seen corresponding path program 1 times [2020-11-28 03:02:26,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:26,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119950329] [2020-11-28 03:02:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:26,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:26,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:02:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:26,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119950329] [2020-11-28 03:02:26,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710363619] [2020-11-28 03:02:26,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:26,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:02:26,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:02:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:26,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:02:26,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-11-28 03:02:26,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572812666] [2020-11-28 03:02:26,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 03:02:26,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:26,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 03:02:26,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:02:26,751 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 9 states. [2020-11-28 03:02:26,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:26,833 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-11-28 03:02:26,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:02:26,834 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-11-28 03:02:26,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:26,835 INFO L225 Difference]: With dead ends: 44 [2020-11-28 03:02:26,835 INFO L226 Difference]: Without dead ends: 44 [2020-11-28 03:02:26,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:02:26,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-28 03:02:26,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-11-28 03:02:26,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-28 03:02:26,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-11-28 03:02:26,840 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 27 [2020-11-28 03:02:26,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:26,841 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-11-28 03:02:26,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 03:02:26,841 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-11-28 03:02:26,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-28 03:02:26,842 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:26,842 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:27,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:27,043 INFO L429 AbstractCegarLoop]: === Iteration 9 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-11-28 03:02:27,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:27,044 INFO L82 PathProgramCache]: Analyzing trace with hash 660364076, now seen corresponding path program 2 times [2020-11-28 03:02:27,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:27,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538137260] [2020-11-28 03:02:27,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:27,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:02:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:27,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538137260] [2020-11-28 03:02:27,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050630894] [2020-11-28 03:02:27,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:27,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:02:27,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:02:27,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:02:27,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:02:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:27,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:02:27,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-11-28 03:02:27,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553450207] [2020-11-28 03:02:27,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 03:02:27,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:27,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 03:02:27,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:02:27,297 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 10 states. [2020-11-28 03:02:27,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:27,394 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-11-28 03:02:27,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:02:27,395 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-11-28 03:02:27,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:27,396 INFO L225 Difference]: With dead ends: 48 [2020-11-28 03:02:27,396 INFO L226 Difference]: Without dead ends: 48 [2020-11-28 03:02:27,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:02:27,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-28 03:02:27,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-11-28 03:02:27,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-28 03:02:27,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-11-28 03:02:27,402 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 31 [2020-11-28 03:02:27,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:27,402 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-11-28 03:02:27,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 03:02:27,403 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-11-28 03:02:27,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-28 03:02:27,411 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:27,411 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:27,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:27,635 INFO L429 AbstractCegarLoop]: === Iteration 10 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-11-28 03:02:27,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:27,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1265514569, now seen corresponding path program 3 times [2020-11-28 03:02:27,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:27,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987684094] [2020-11-28 03:02:27,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:27,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:27,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:02:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:27,809 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:27,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987684094] [2020-11-28 03:02:27,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648982699] [2020-11-28 03:02:27,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:27,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-28 03:02:27,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:02:27,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:02:27,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:02:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:27,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:02:27,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-11-28 03:02:27,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265486883] [2020-11-28 03:02:27,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 03:02:27,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:27,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 03:02:27,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:02:27,939 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 11 states. [2020-11-28 03:02:28,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:28,061 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-11-28 03:02:28,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:02:28,062 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-11-28 03:02:28,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:28,063 INFO L225 Difference]: With dead ends: 52 [2020-11-28 03:02:28,063 INFO L226 Difference]: Without dead ends: 52 [2020-11-28 03:02:28,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:02:28,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-28 03:02:28,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-11-28 03:02:28,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-28 03:02:28,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-11-28 03:02:28,068 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 35 [2020-11-28 03:02:28,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:28,069 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-11-28 03:02:28,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 03:02:28,069 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-11-28 03:02:28,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-28 03:02:28,070 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:28,070 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:28,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:28,299 INFO L429 AbstractCegarLoop]: === Iteration 11 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-11-28 03:02:28,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:28,300 INFO L82 PathProgramCache]: Analyzing trace with hash 719470310, now seen corresponding path program 4 times [2020-11-28 03:02:28,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:28,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895368871] [2020-11-28 03:02:28,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:28,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:02:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:28,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895368871] [2020-11-28 03:02:28,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897400300] [2020-11-28 03:02:28,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:28,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 03:02:28,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:02:28,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 03:02:28,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:02:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:28,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:02:28,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-11-28 03:02:28,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582826037] [2020-11-28 03:02:28,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 03:02:28,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:28,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:02:28,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:02:28,632 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 12 states. [2020-11-28 03:02:28,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:28,760 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-11-28 03:02:28,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:02:28,760 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-11-28 03:02:28,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:28,761 INFO L225 Difference]: With dead ends: 56 [2020-11-28 03:02:28,761 INFO L226 Difference]: Without dead ends: 56 [2020-11-28 03:02:28,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:02:28,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-28 03:02:28,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-11-28 03:02:28,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-28 03:02:28,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-11-28 03:02:28,768 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 39 [2020-11-28 03:02:28,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:28,768 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-11-28 03:02:28,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 03:02:28,769 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-11-28 03:02:28,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-28 03:02:28,770 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:28,770 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:28,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:28,987 INFO L429 AbstractCegarLoop]: === Iteration 12 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-11-28 03:02:28,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:28,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1920487677, now seen corresponding path program 5 times [2020-11-28 03:02:28,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:28,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355246807] [2020-11-28 03:02:28,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:29,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:02:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:29,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355246807] [2020-11-28 03:02:29,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299650038] [2020-11-28 03:02:29,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:29,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-28 03:02:29,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:02:29,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:02:29,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:02:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:29,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:02:29,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-11-28 03:02:29,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245510942] [2020-11-28 03:02:29,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 03:02:29,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:29,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 03:02:29,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:02:29,298 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 13 states. [2020-11-28 03:02:29,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:29,434 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-11-28 03:02:29,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 03:02:29,435 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-11-28 03:02:29,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:29,436 INFO L225 Difference]: With dead ends: 60 [2020-11-28 03:02:29,436 INFO L226 Difference]: Without dead ends: 60 [2020-11-28 03:02:29,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:02:29,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-28 03:02:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-11-28 03:02:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-28 03:02:29,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-11-28 03:02:29,442 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 43 [2020-11-28 03:02:29,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:29,442 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-11-28 03:02:29,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 03:02:29,442 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-11-28 03:02:29,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-28 03:02:29,447 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:29,447 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:29,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-28 03:02:29,648 INFO L429 AbstractCegarLoop]: === Iteration 13 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-11-28 03:02:29,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:29,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1099810976, now seen corresponding path program 6 times [2020-11-28 03:02:29,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:29,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386930282] [2020-11-28 03:02:29,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:29,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:02:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:29,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386930282] [2020-11-28 03:02:29,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640437204] [2020-11-28 03:02:29,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:29,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-28 03:02:29,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:02:29,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:02:29,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:02:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:30,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:02:30,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-11-28 03:02:30,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068109870] [2020-11-28 03:02:30,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-28 03:02:30,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:30,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 03:02:30,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:02:30,042 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 14 states. [2020-11-28 03:02:30,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:30,157 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-11-28 03:02:30,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 03:02:30,157 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-11-28 03:02:30,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:30,158 INFO L225 Difference]: With dead ends: 61 [2020-11-28 03:02:30,158 INFO L226 Difference]: Without dead ends: 61 [2020-11-28 03:02:30,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:02:30,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-28 03:02:30,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-11-28 03:02:30,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-28 03:02:30,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-11-28 03:02:30,167 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 47 [2020-11-28 03:02:30,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:30,167 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-11-28 03:02:30,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-28 03:02:30,167 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-11-28 03:02:30,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-28 03:02:30,171 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:30,171 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:30,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:30,373 INFO L429 AbstractCegarLoop]: === Iteration 14 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-11-28 03:02:30,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:30,373 INFO L82 PathProgramCache]: Analyzing trace with hash -343684163, now seen corresponding path program 7 times [2020-11-28 03:02:30,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:30,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133419781] [2020-11-28 03:02:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:02:30,418 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:02:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:02:30,447 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:02:30,472 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:02:30,473 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:02:30,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-28 03:02:30,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:02:30 BoogieIcfgContainer [2020-11-28 03:02:30,516 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:02:30,517 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:02:30,517 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:02:30,518 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:02:30,518 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:02:23" (3/4) ... [2020-11-28 03:02:30,521 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:02:30,618 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_27eb11c3-8da0-492c-ba5c-4abe682b4649/bin/uautomizer/witness.graphml [2020-11-28 03:02:30,619 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:02:30,620 INFO L168 Benchmark]: Toolchain (without parser) took 8151.01 ms. Allocated memory was 96.5 MB in the beginning and 136.3 MB in the end (delta: 39.8 MB). Free memory was 62.1 MB in the beginning and 77.2 MB in the end (delta: -15.1 MB). Peak memory consumption was 24.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:30,621 INFO L168 Benchmark]: CDTParser took 0.68 ms. Allocated memory is still 96.5 MB. Free memory was 69.8 MB in the beginning and 69.8 MB in the end (delta: 24.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:02:30,621 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.69 ms. Allocated memory is still 96.5 MB. Free memory was 61.9 MB in the beginning and 72.8 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:30,622 INFO L168 Benchmark]: Boogie Preprocessor took 65.06 ms. Allocated memory is still 96.5 MB. Free memory was 72.8 MB in the beginning and 71.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:30,622 INFO L168 Benchmark]: RCFGBuilder took 411.15 ms. Allocated memory is still 96.5 MB. Free memory was 71.5 MB in the beginning and 56.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:30,623 INFO L168 Benchmark]: TraceAbstraction took 7226.62 ms. Allocated memory was 96.5 MB in the beginning and 136.3 MB in the end (delta: 39.8 MB). Free memory was 56.4 MB in the beginning and 79.3 MB in the end (delta: -22.9 MB). Peak memory consumption was 18.8 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:30,623 INFO L168 Benchmark]: Witness Printer took 101.69 ms. Allocated memory is still 136.3 MB. Free memory was 79.3 MB in the beginning and 77.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:30,625 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.68 ms. Allocated memory is still 96.5 MB. Free memory was 69.8 MB in the beginning and 69.8 MB in the end (delta: 24.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 338.69 ms. Allocated memory is still 96.5 MB. Free memory was 61.9 MB in the beginning and 72.8 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 65.06 ms. Allocated memory is still 96.5 MB. Free memory was 72.8 MB in the beginning and 71.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 411.15 ms. Allocated memory is still 96.5 MB. Free memory was 71.5 MB in the beginning and 56.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7226.62 ms. Allocated memory was 96.5 MB in the beginning and 136.3 MB in the end (delta: 39.8 MB). Free memory was 56.4 MB in the beginning and 79.3 MB in the end (delta: -22.9 MB). Peak memory consumption was 18.8 MB. Max. memory is 16.1 GB. * Witness Printer took 101.69 ms. Allocated memory is still 136.3 MB. Free memory was 79.3 MB in the beginning and 77.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-1, i=0, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=1, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-2, i=1, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=2, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-3, i=2, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=3, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-4, i=3, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=4, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-5, i=4, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=5, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-6, i=5, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=6, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-7, i=6, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=7, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-8, i=7, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=8, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-9, i=8, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=9, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=10, i=9, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=10, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND FALSE !(i < 10) VAL [i=10, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L14] free(p) VAL [i=10, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L14] free(p) VAL [i=10, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L14] free(p) [L16] p[2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 33 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.0s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 259 SDtfs, 211 SDslu, 716 SDs, 0 SdLazy, 726 SolverSat, 45 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 380 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=13, 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, 13 MinimizatonAttempts, 37 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 647 NumberOfCodeBlocks, 631 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 574 ConstructedInterpolants, 0 QuantifiedInterpolants, 50358 SizeOfPredicates, 10 NumberOfNonLiveVariables, 905 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 22 InterpolantComputations, 5 PerfectInterpolantSequences, 29/1097 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...