./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-properties/simple-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/bin/uautomizer-UnR33cPsHg/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/bin/uautomizer-UnR33cPsHg --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7a8519f8a7c8757a31f412eb366ebcbc8dd5e899d9ff0dd6bfc4f50c36dfb89b .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 08:54:12,024 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:54:12,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:54:12,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:54:12,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:54:12,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:54:12,083 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:54:12,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:54:12,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:54:12,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:54:12,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:54:12,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:54:12,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:54:12,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:54:12,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:54:12,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:54:12,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:54:12,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:54:12,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:54:12,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:54:12,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:54:12,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:54:12,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:54:12,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:54:12,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:54:12,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:54:12,127 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:54:12,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:54:12,129 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:54:12,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:54:12,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:54:12,133 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:54:12,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:54:12,136 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:54:12,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:54:12,138 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:54:12,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:54:12,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:54:12,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:54:12,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:54:12,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:54:12,144 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/bin/uautomizer-UnR33cPsHg/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-10-28 08:54:12,174 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:54:12,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:54:12,175 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:54:12,175 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:54:12,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:54:12,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:54:12,178 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:54:12,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:54:12,178 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:54:12,179 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 08:54:12,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:54:12,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:54:12,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:54:12,180 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 08:54:12,180 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 08:54:12,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:54:12,181 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 08:54:12,181 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:54:12,181 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:54:12,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:54:12,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:54:12,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:54:12,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:54:12,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:54:12,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:54:12,184 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:54:12,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:54:12,184 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:54:12,185 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_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a8519f8a7c8757a31f412eb366ebcbc8dd5e899d9ff0dd6bfc4f50c36dfb89b [2021-10-28 08:54:12,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:54:12,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:54:12,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:54:12,517 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:54:12,519 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:54:12,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/list-properties/simple-1.i [2021-10-28 08:54:12,600 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/bin/uautomizer-UnR33cPsHg/data/5e616e2b1/3ac2cf36df574d4894565051e9aa1fa8/FLAG7c5d79661 [2021-10-28 08:54:13,239 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:54:13,240 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/sv-benchmarks/c/list-properties/simple-1.i [2021-10-28 08:54:13,255 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/bin/uautomizer-UnR33cPsHg/data/5e616e2b1/3ac2cf36df574d4894565051e9aa1fa8/FLAG7c5d79661 [2021-10-28 08:54:13,516 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/bin/uautomizer-UnR33cPsHg/data/5e616e2b1/3ac2cf36df574d4894565051e9aa1fa8 [2021-10-28 08:54:13,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:54:13,521 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 08:54:13,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:54:13,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:54:13,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:54:13,541 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:54:13" (1/1) ... [2021-10-28 08:54:13,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19d1333c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:13, skipping insertion in model container [2021-10-28 08:54:13,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:54:13" (1/1) ... [2021-10-28 08:54:13,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:54:13,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:54:13,977 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/sv-benchmarks/c/list-properties/simple-1.i[23237,23250] [2021-10-28 08:54:13,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:54:14,006 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:54:14,072 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/sv-benchmarks/c/list-properties/simple-1.i[23237,23250] [2021-10-28 08:54:14,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:54:14,110 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:54:14,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:14 WrapperNode [2021-10-28 08:54:14,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:54:14,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:54:14,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:54:14,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:54:14,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:14" (1/1) ... [2021-10-28 08:54:14,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:14" (1/1) ... [2021-10-28 08:54:14,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:14" (1/1) ... [2021-10-28 08:54:14,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:14" (1/1) ... [2021-10-28 08:54:14,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:14" (1/1) ... [2021-10-28 08:54:14,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:14" (1/1) ... [2021-10-28 08:54:14,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:14" (1/1) ... [2021-10-28 08:54:14,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:54:14,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:54:14,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:54:14,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:54:14,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:14" (1/1) ... [2021-10-28 08:54:14,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:54:14,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:54:14,269 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:54:14,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:54:14,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 08:54:14,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:54:14,324 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 08:54:14,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 08:54:14,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 08:54:14,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 08:54:14,325 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 08:54:14,325 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 08:54:14,325 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-28 08:54:14,325 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 08:54:14,326 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 08:54:14,326 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 08:54:14,326 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 08:54:14,326 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 08:54:14,327 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 08:54:14,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:54:14,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 08:54:14,327 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 08:54:14,327 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 08:54:14,328 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 08:54:14,328 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 08:54:14,328 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 08:54:14,328 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 08:54:14,329 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 08:54:14,329 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 08:54:14,329 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 08:54:14,329 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 08:54:14,330 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 08:54:14,330 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 08:54:14,330 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 08:54:14,330 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 08:54:14,331 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 08:54:14,331 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 08:54:14,331 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 08:54:14,331 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 08:54:14,332 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 08:54:14,332 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 08:54:14,332 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 08:54:14,332 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 08:54:14,333 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 08:54:14,333 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 08:54:14,333 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 08:54:14,333 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 08:54:14,333 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 08:54:14,334 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 08:54:14,334 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 08:54:14,334 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 08:54:14,334 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 08:54:14,335 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 08:54:14,335 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 08:54:14,335 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 08:54:14,335 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 08:54:14,336 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 08:54:14,336 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 08:54:14,336 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 08:54:14,336 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 08:54:14,336 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 08:54:14,337 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 08:54:14,337 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 08:54:14,337 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 08:54:14,337 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 08:54:14,338 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 08:54:14,338 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 08:54:14,338 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 08:54:14,338 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 08:54:14,339 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 08:54:14,339 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 08:54:14,339 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 08:54:14,339 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 08:54:14,339 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 08:54:14,340 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 08:54:14,340 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 08:54:14,340 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 08:54:14,340 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 08:54:14,341 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 08:54:14,341 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 08:54:14,341 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 08:54:14,341 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 08:54:14,342 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 08:54:14,342 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 08:54:14,342 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 08:54:14,343 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 08:54:14,343 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 08:54:14,343 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 08:54:14,343 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 08:54:14,344 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 08:54:14,344 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 08:54:14,344 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 08:54:14,344 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 08:54:14,345 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 08:54:14,345 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 08:54:14,345 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 08:54:14,345 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 08:54:14,346 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 08:54:14,346 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 08:54:14,346 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 08:54:14,347 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 08:54:14,347 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 08:54:14,347 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 08:54:14,347 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 08:54:14,348 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 08:54:14,348 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 08:54:14,348 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 08:54:14,348 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 08:54:14,349 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 08:54:14,349 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 08:54:14,349 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 08:54:14,349 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 08:54:14,350 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 08:54:14,350 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 08:54:14,351 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 08:54:14,351 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 08:54:14,351 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 08:54:14,351 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 08:54:14,351 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 08:54:14,352 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 08:54:14,352 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 08:54:14,352 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 08:54:14,352 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 08:54:14,352 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 08:54:14,353 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 08:54:14,353 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 08:54:14,353 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 08:54:14,353 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-28 08:54:14,353 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 08:54:14,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 08:54:14,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 08:54:14,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 08:54:14,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 08:54:14,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 08:54:14,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 08:54:14,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 08:54:14,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:54:14,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 08:54:14,741 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-28 08:54:15,036 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:54:15,036 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-28 08:54:15,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:54:15 BoogieIcfgContainer [2021-10-28 08:54:15,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:54:15,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:54:15,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:54:15,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:54:15,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:54:13" (1/3) ... [2021-10-28 08:54:15,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a43e373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:54:15, skipping insertion in model container [2021-10-28 08:54:15,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:14" (2/3) ... [2021-10-28 08:54:15,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a43e373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:54:15, skipping insertion in model container [2021-10-28 08:54:15,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:54:15" (3/3) ... [2021-10-28 08:54:15,062 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-1.i [2021-10-28 08:54:15,068 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:54:15,069 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2021-10-28 08:54:15,126 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:54:15,134 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 08:54:15,134 INFO L340 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2021-10-28 08:54:15,151 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 47 states have internal predecessors, (53), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 08:54:15,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 08:54:15,161 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:54:15,162 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:54:15,162 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 13 more)] === [2021-10-28 08:54:15,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:54:15,169 INFO L85 PathProgramCache]: Analyzing trace with hash -733404871, now seen corresponding path program 1 times [2021-10-28 08:54:15,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:54:15,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569320813] [2021-10-28 08:54:15,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:54:15,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:54:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:54:15,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:54:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:54:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:54:15,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:54:15,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569320813] [2021-10-28 08:54:15,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569320813] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:54:15,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:54:15,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:54:15,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867497108] [2021-10-28 08:54:15,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:54:15,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:54:15,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:54:15,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:54:15,545 INFO L87 Difference]: Start difference. First operand has 53 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 47 states have internal predecessors, (53), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:15,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:54:15,720 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2021-10-28 08:54:15,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:54:15,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-28 08:54:15,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:54:15,732 INFO L225 Difference]: With dead ends: 52 [2021-10-28 08:54:15,733 INFO L226 Difference]: Without dead ends: 45 [2021-10-28 08:54:15,735 INFO L786 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 [2021-10-28 08:54:15,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-28 08:54:15,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-10-28 08:54:15,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 25 states have (on average 1.72) internal successors, (43), 41 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:15,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-10-28 08:54:15,798 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 9 [2021-10-28 08:54:15,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:54:15,799 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-10-28 08:54:15,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:15,800 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-10-28 08:54:15,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 08:54:15,801 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:54:15,802 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:54:15,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 08:54:15,803 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 13 more)] === [2021-10-28 08:54:15,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:54:15,805 INFO L85 PathProgramCache]: Analyzing trace with hash -733404870, now seen corresponding path program 1 times [2021-10-28 08:54:15,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:54:15,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275649551] [2021-10-28 08:54:15,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:54:15,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:54:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:54:15,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:54:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:54:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:54:16,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:54:16,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275649551] [2021-10-28 08:54:16,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275649551] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:54:16,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:54:16,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:54:16,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367283720] [2021-10-28 08:54:16,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:54:16,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:54:16,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:54:16,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:54:16,020 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:16,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:54:16,158 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-10-28 08:54:16,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:54:16,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-28 08:54:16,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:54:16,161 INFO L225 Difference]: With dead ends: 44 [2021-10-28 08:54:16,161 INFO L226 Difference]: Without dead ends: 44 [2021-10-28 08:54:16,162 INFO L786 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 [2021-10-28 08:54:16,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-28 08:54:16,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-28 08:54:16,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 25 states have (on average 1.68) internal successors, (42), 40 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:16,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-10-28 08:54:16,180 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 9 [2021-10-28 08:54:16,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:54:16,180 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-10-28 08:54:16,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:16,181 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-10-28 08:54:16,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 08:54:16,184 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:54:16,184 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:54:16,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 08:54:16,186 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 13 more)] === [2021-10-28 08:54:16,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:54:16,188 INFO L85 PathProgramCache]: Analyzing trace with hash -365871131, now seen corresponding path program 1 times [2021-10-28 08:54:16,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:54:16,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794183825] [2021-10-28 08:54:16,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:54:16,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:54:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:54:16,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:54:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:54:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:54:16,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:54:16,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794183825] [2021-10-28 08:54:16,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794183825] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:54:16,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:54:16,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:54:16,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988161879] [2021-10-28 08:54:16,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:54:16,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:54:16,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:54:16,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:54:16,339 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:16,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:54:16,593 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-10-28 08:54:16,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 08:54:16,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-28 08:54:16,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:54:16,598 INFO L225 Difference]: With dead ends: 75 [2021-10-28 08:54:16,598 INFO L226 Difference]: Without dead ends: 75 [2021-10-28 08:54:16,600 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:54:16,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-28 08:54:16,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 48. [2021-10-28 08:54:16,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 44 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:16,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-10-28 08:54:16,614 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 12 [2021-10-28 08:54:16,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:54:16,615 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-10-28 08:54:16,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:16,615 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-10-28 08:54:16,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 08:54:16,616 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:54:16,616 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:54:16,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 08:54:16,616 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 13 more)] === [2021-10-28 08:54:16,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:54:16,617 INFO L85 PathProgramCache]: Analyzing trace with hash -365871130, now seen corresponding path program 1 times [2021-10-28 08:54:16,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:54:16,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299361575] [2021-10-28 08:54:16,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:54:16,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:54:16,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:54:16,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:54:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:54:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:54:16,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:54:16,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299361575] [2021-10-28 08:54:16,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299361575] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:54:16,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:54:16,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:54:16,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26157971] [2021-10-28 08:54:16,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:54:16,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:54:16,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:54:16,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:54:16,751 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:16,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:54:16,946 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2021-10-28 08:54:16,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:54:16,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-28 08:54:16,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:54:16,949 INFO L225 Difference]: With dead ends: 64 [2021-10-28 08:54:16,949 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 08:54:16,949 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:54:16,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 08:54:16,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2021-10-28 08:54:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 52 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:16,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-10-28 08:54:16,960 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 12 [2021-10-28 08:54:16,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:54:16,960 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-10-28 08:54:16,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:16,961 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-10-28 08:54:16,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 08:54:16,962 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:54:16,962 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:54:16,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 08:54:16,963 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr17ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 13 more)] === [2021-10-28 08:54:16,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:54:16,963 INFO L85 PathProgramCache]: Analyzing trace with hash -695098105, now seen corresponding path program 1 times [2021-10-28 08:54:16,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:54:16,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471645802] [2021-10-28 08:54:16,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:54:16,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:54:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:54:17,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:54:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:54:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:54:17,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:54:17,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471645802] [2021-10-28 08:54:17,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471645802] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:54:17,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:54:17,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 08:54:17,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880416841] [2021-10-28 08:54:17,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:54:17,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:54:17,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:54:17,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:54:17,105 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:17,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:54:17,245 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2021-10-28 08:54:17,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:54:17,246 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-28 08:54:17,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:54:17,247 INFO L225 Difference]: With dead ends: 61 [2021-10-28 08:54:17,247 INFO L226 Difference]: Without dead ends: 61 [2021-10-28 08:54:17,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:54:17,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-28 08:54:17,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2021-10-28 08:54:17,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 52 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-10-28 08:54:17,254 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 17 [2021-10-28 08:54:17,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:54:17,255 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-10-28 08:54:17,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:17,255 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-10-28 08:54:17,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 08:54:17,256 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:54:17,257 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:54:17,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 08:54:17,257 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr14ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 13 more)] === [2021-10-28 08:54:17,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:54:17,258 INFO L85 PathProgramCache]: Analyzing trace with hash -73163862, now seen corresponding path program 1 times [2021-10-28 08:54:17,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:54:17,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171687943] [2021-10-28 08:54:17,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:54:17,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:54:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:54:17,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:54:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:54:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:54:17,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:54:17,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171687943] [2021-10-28 08:54:17,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171687943] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:54:17,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:54:17,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 08:54:17,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721739170] [2021-10-28 08:54:17,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:54:17,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:54:17,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:54:17,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:54:17,430 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:17,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:54:17,646 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2021-10-28 08:54:17,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:54:17,647 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-10-28 08:54:17,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:54:17,650 INFO L225 Difference]: With dead ends: 77 [2021-10-28 08:54:17,651 INFO L226 Difference]: Without dead ends: 77 [2021-10-28 08:54:17,652 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:54:17,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-28 08:54:17,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 57. [2021-10-28 08:54:17,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 42 states have (on average 1.380952380952381) internal successors, (58), 53 states have internal predecessors, (58), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:17,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-10-28 08:54:17,667 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 18 [2021-10-28 08:54:17,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:54:17,668 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-10-28 08:54:17,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:17,668 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-10-28 08:54:17,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 08:54:17,669 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:54:17,670 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:54:17,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 08:54:17,670 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 13 more)] === [2021-10-28 08:54:17,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:54:17,671 INFO L85 PathProgramCache]: Analyzing trace with hash -159453352, now seen corresponding path program 1 times [2021-10-28 08:54:17,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:54:17,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815075884] [2021-10-28 08:54:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:54:17,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:54:17,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:54:17,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:54:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:54:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:54:17,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:54:17,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815075884] [2021-10-28 08:54:17,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815075884] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:54:17,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:54:17,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 08:54:17,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839388020] [2021-10-28 08:54:17,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:54:17,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:54:17,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:54:17,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:54:17,835 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:18,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:54:18,063 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2021-10-28 08:54:18,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:54:18,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-28 08:54:18,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:54:18,065 INFO L225 Difference]: With dead ends: 69 [2021-10-28 08:54:18,065 INFO L226 Difference]: Without dead ends: 69 [2021-10-28 08:54:18,065 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:54:18,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-28 08:54:18,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2021-10-28 08:54:18,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 51 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:18,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2021-10-28 08:54:18,071 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 20 [2021-10-28 08:54:18,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:54:18,072 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2021-10-28 08:54:18,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:18,072 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2021-10-28 08:54:18,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 08:54:18,073 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:54:18,073 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:54:18,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 08:54:18,074 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 13 more)] === [2021-10-28 08:54:18,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:54:18,074 INFO L85 PathProgramCache]: Analyzing trace with hash -159453351, now seen corresponding path program 1 times [2021-10-28 08:54:18,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:54:18,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131269154] [2021-10-28 08:54:18,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:54:18,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:54:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:54:18,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:54:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:54:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:54:18,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:54:18,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131269154] [2021-10-28 08:54:18,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131269154] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:54:18,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:54:18,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 08:54:18,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096609881] [2021-10-28 08:54:18,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:54:18,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:54:18,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:54:18,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:54:18,204 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:18,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:54:18,482 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2021-10-28 08:54:18,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:54:18,483 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-28 08:54:18,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:54:18,484 INFO L225 Difference]: With dead ends: 65 [2021-10-28 08:54:18,484 INFO L226 Difference]: Without dead ends: 65 [2021-10-28 08:54:18,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:54:18,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-28 08:54:18,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2021-10-28 08:54:18,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 41 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:18,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-10-28 08:54:18,489 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 20 [2021-10-28 08:54:18,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:54:18,493 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-10-28 08:54:18,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:18,494 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-10-28 08:54:18,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 08:54:18,495 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:54:18,495 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:54:18,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 08:54:18,496 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 13 more)] === [2021-10-28 08:54:18,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:54:18,497 INFO L85 PathProgramCache]: Analyzing trace with hash -2071334378, now seen corresponding path program 1 times [2021-10-28 08:54:18,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:54:18,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702685609] [2021-10-28 08:54:18,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:54:18,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:54:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:54:18,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:54:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:54:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:54:18,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:54:18,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702685609] [2021-10-28 08:54:18,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702685609] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:54:18,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108184329] [2021-10-28 08:54:18,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:54:18,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:54:18,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:54:18,772 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:54:18,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 08:54:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:54:18,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 08:54:18,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:54:19,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-10-28 08:54:19,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-10-28 08:54:19,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-28 08:54:19,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-10-28 08:54:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:54:19,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108184329] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:54:19,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:54:19,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 12 [2021-10-28 08:54:19,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338883736] [2021-10-28 08:54:19,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 08:54:19,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:54:19,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 08:54:19,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:54:19,401 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:19,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:54:19,661 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-10-28 08:54:19,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:54:19,661 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-28 08:54:19,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:54:19,662 INFO L225 Difference]: With dead ends: 61 [2021-10-28 08:54:19,663 INFO L226 Difference]: Without dead ends: 61 [2021-10-28 08:54:19,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:54:19,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-28 08:54:19,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 48. [2021-10-28 08:54:19,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.225) internal successors, (49), 44 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:19,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-10-28 08:54:19,668 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 21 [2021-10-28 08:54:19,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:54:19,668 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-10-28 08:54:19,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:54:19,669 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-10-28 08:54:19,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 08:54:19,670 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:54:19,670 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:54:19,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 08:54:19,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:54:19,891 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr17ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 13 more)] === [2021-10-28 08:54:19,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:54:19,891 INFO L85 PathProgramCache]: Analyzing trace with hash 213142458, now seen corresponding path program 1 times [2021-10-28 08:54:19,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:54:19,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247034679] [2021-10-28 08:54:19,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:54:19,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:54:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:54:19,927 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 08:54:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:54:20,005 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 08:54:20,006 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 08:54:20,007 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr17ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 08:54:20,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 08:54:20,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 08:54:20,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-28 08:54:20,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-28 08:54:20,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-28 08:54:20,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-28 08:54:20,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-28 08:54:20,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-28 08:54:20,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-28 08:54:20,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-28 08:54:20,012 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-28 08:54:20,012 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-28 08:54:20,012 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-28 08:54:20,012 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-28 08:54:20,012 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 08:54:20,013 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-28 08:54:20,013 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-28 08:54:20,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 08:54:20,018 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:54:20,025 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:54:20,045 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-28 08:54:20,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:54:20 BoogieIcfgContainer [2021-10-28 08:54:20,072 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:54:20,072 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:54:20,073 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:54:20,073 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:54:20,073 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:54:15" (3/4) ... [2021-10-28 08:54:20,075 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 08:54:20,089 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-28 08:54:20,148 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 08:54:20,148 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:54:20,152 INFO L168 Benchmark]: Toolchain (without parser) took 6628.32 ms. Allocated memory was 130.0 MB in the beginning and 172.0 MB in the end (delta: 41.9 MB). Free memory was 105.9 MB in the beginning and 88.6 MB in the end (delta: 17.3 MB). Peak memory consumption was 57.8 MB. Max. memory is 16.1 GB. [2021-10-28 08:54:20,152 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 130.0 MB. Free memory is still 84.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:54:20,152 INFO L168 Benchmark]: CACSL2BoogieTranslator took 587.60 ms. Allocated memory is still 130.0 MB. Free memory was 105.9 MB in the beginning and 98.6 MB in the end (delta: 7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 08:54:20,153 INFO L168 Benchmark]: Boogie Preprocessor took 79.94 ms. Allocated memory is still 130.0 MB. Free memory was 98.6 MB in the beginning and 96.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:54:20,154 INFO L168 Benchmark]: RCFGBuilder took 854.32 ms. Allocated memory is still 130.0 MB. Free memory was 96.1 MB in the beginning and 75.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-28 08:54:20,154 INFO L168 Benchmark]: TraceAbstraction took 5019.19 ms. Allocated memory was 130.0 MB in the beginning and 172.0 MB in the end (delta: 41.9 MB). Free memory was 74.7 MB in the beginning and 90.7 MB in the end (delta: -15.9 MB). Peak memory consumption was 26.3 MB. Max. memory is 16.1 GB. [2021-10-28 08:54:20,155 INFO L168 Benchmark]: Witness Printer took 75.86 ms. Allocated memory is still 172.0 MB. Free memory was 90.7 MB in the beginning and 88.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:54:20,159 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 130.0 MB. Free memory is still 84.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 587.60 ms. Allocated memory is still 130.0 MB. Free memory was 105.9 MB in the beginning and 98.6 MB in the end (delta: 7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 79.94 ms. Allocated memory is still 130.0 MB. Free memory was 98.6 MB in the beginning and 96.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 854.32 ms. Allocated memory is still 130.0 MB. Free memory was 96.1 MB in the beginning and 75.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5019.19 ms. Allocated memory was 130.0 MB in the beginning and 172.0 MB in the end (delta: 41.9 MB). Free memory was 74.7 MB in the beginning and 90.7 MB in the end (delta: -15.9 MB). Peak memory consumption was 26.3 MB. Max. memory is 16.1 GB. * Witness Printer took 75.86 ms. Allocated memory is still 172.0 MB. Free memory was 90.7 MB in the beginning and 88.6 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.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 531]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={-1:0}] [L534] List t; [L535] List p = a; VAL [a={-1:0}, p={-1:0}] [L536] a->h = 2 VAL [a={-1:0}, p={-1:0}] [L537] COND FALSE !(__VERIFIER_nondet_int()) [L544] p->h = 2 VAL [a={-1:0}, p={-1:0}] [L545] p->n = 0 VAL [a={-1:0}, p={-1:0}] [L546] p = a VAL [a={-1:0}, p={-1:0}] [L547] COND TRUE p!=0 VAL [a={-1:0}, p={-1:0}] [L548] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=2] [L548] COND FALSE !(p->h != 2) [L551] EXPR p->n VAL [a={-1:0}, p={-1:0}, p->n={0:0}] [L551] p = p->n [L547] COND FALSE !(p!=0) VAL [a={-1:0}, p={0:0}] [L553] return 0; VAL [\result=0, a={-1:0}, p={0:0}] - UnprovableResult [Line: 536]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 536]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 72 locations, 18 error locations. Started 1 CEGAR loops. OverallTime: 4.8s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 241 SDtfs, 528 SDslu, 420 SDs, 0 SdLazy, 1054 SolverSat, 85 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=6, InterpolantAutomatonStates: 58, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 107 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 181 NumberOfCodeBlocks, 181 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 149 ConstructedInterpolants, 0 QuantifiedInterpolants, 969 SizeOfPredicates, 8 NumberOfNonLiveVariables, 132 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 10 InterpolantComputations, 8 PerfectInterpolantSequences, 6/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 08:54:20,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3d9f290-69fb-4e0f-8514-bb4028159720/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...