./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/heap-manipulation/tree-4.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_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/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_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/tree-4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/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_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/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 93cf6e13715dcd5309cb599b4358d41a64464f02c52b3716bc554a9d0e833f5e ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 09:59:28,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:59:28,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:59:29,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:59:29,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:59:29,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:59:29,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:59:29,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:59:29,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:59:29,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:59:29,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:59:29,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:59:29,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:59:29,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:59:29,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:59:29,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:59:29,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:59:29,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:59:29,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:59:29,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:59:29,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:59:29,049 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:59:29,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:59:29,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:59:29,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:59:29,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:59:29,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:59:29,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:59:29,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:59:29,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:59:29,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:59:29,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:59:29,076 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:59:29,077 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:59:29,078 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:59:29,078 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:59:29,079 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:59:29,080 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:59:29,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:59:29,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:59:29,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:59:29,083 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-10-28 09:59:29,113 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:59:29,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:59:29,114 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:59:29,114 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:59:29,115 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:59:29,115 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:59:29,116 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:59:29,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:59:29,116 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:59:29,116 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:59:29,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:59:29,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:59:29,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:59:29,117 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 09:59:29,118 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 09:59:29,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:59:29,118 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 09:59:29,118 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:59:29,118 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:59:29,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:59:29,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:59:29,119 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:59:29,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:59:29,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:59:29,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:59:29,120 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:59:29,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:59:29,120 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:59:29,121 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_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93cf6e13715dcd5309cb599b4358d41a64464f02c52b3716bc554a9d0e833f5e [2021-10-28 09:59:29,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:59:29,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:59:29,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:59:29,494 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:59:29,496 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:59:29,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/heap-manipulation/tree-4.i [2021-10-28 09:59:29,588 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/data/2bab14a37/608a68a4111041d9af221386f43da1af/FLAG5f3f03b84 [2021-10-28 09:59:30,208 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:59:30,209 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/sv-benchmarks/c/heap-manipulation/tree-4.i [2021-10-28 09:59:30,229 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/data/2bab14a37/608a68a4111041d9af221386f43da1af/FLAG5f3f03b84 [2021-10-28 09:59:30,473 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/data/2bab14a37/608a68a4111041d9af221386f43da1af [2021-10-28 09:59:30,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:59:30,478 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 09:59:30,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:59:30,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:59:30,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:59:30,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:59:30" (1/1) ... [2021-10-28 09:59:30,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c3b0d28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:30, skipping insertion in model container [2021-10-28 09:59:30,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:59:30" (1/1) ... [2021-10-28 09:59:30,497 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:59:30,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:59:30,953 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_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/sv-benchmarks/c/heap-manipulation/tree-4.i[22626,22639] [2021-10-28 09:59:31,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:59:31,034 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:59:31,090 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_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/sv-benchmarks/c/heap-manipulation/tree-4.i[22626,22639] [2021-10-28 09:59:31,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:59:31,149 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:59:31,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:31 WrapperNode [2021-10-28 09:59:31,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:59:31,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:59:31,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:59:31,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:59:31,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:31" (1/1) ... [2021-10-28 09:59:31,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:31" (1/1) ... [2021-10-28 09:59:31,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:31" (1/1) ... [2021-10-28 09:59:31,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:31" (1/1) ... [2021-10-28 09:59:31,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:31" (1/1) ... [2021-10-28 09:59:31,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:31" (1/1) ... [2021-10-28 09:59:31,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:31" (1/1) ... [2021-10-28 09:59:31,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:59:31,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:59:31,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:59:31,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:59:31,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:31" (1/1) ... [2021-10-28 09:59:31,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:59:31,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:59:31,355 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:59:31,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:59:31,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 09:59:31,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:59:31,421 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 09:59:31,421 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 09:59:31,421 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 09:59:31,421 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-10-28 09:59:31,423 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect [2021-10-28 09:59:31,423 INFO L138 BoogieDeclarations]: Found implementation of procedure create_tree [2021-10-28 09:59:31,424 INFO L138 BoogieDeclarations]: Found implementation of procedure free_tree [2021-10-28 09:59:31,424 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 09:59:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 09:59:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 09:59:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 09:59:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 09:59:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 09:59:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:59:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 09:59:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 09:59:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 09:59:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 09:59:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 09:59:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 09:59:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 09:59:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 09:59:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 09:59:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 09:59:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 09:59:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 09:59:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 09:59:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 09:59:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 09:59:31,430 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 09:59:31,430 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 09:59:31,430 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 09:59:31,430 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 09:59:31,430 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 09:59:31,431 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 09:59:31,431 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 09:59:31,431 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 09:59:31,431 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 09:59:31,431 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 09:59:31,432 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 09:59:31,433 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 09:59:31,433 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 09:59:31,433 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 09:59:31,433 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 09:59:31,434 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 09:59:31,434 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 09:59:31,434 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 09:59:31,435 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 09:59:31,436 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 09:59:31,436 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 09:59:31,436 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 09:59:31,437 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 09:59:31,437 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 09:59:31,437 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 09:59:31,438 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 09:59:31,438 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 09:59:31,438 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 09:59:31,438 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 09:59:31,438 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 09:59:31,439 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 09:59:31,439 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 09:59:31,439 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 09:59:31,439 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 09:59:31,440 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 09:59:31,440 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 09:59:31,441 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 09:59:31,442 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 09:59:31,443 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 09:59:31,443 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 09:59:31,443 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 09:59:31,444 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-28 09:59:31,444 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 09:59:31,444 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 09:59:31,444 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 09:59:31,444 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 09:59:31,444 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 09:59:31,445 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 09:59:31,445 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 09:59:31,445 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 09:59:31,445 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 09:59:31,445 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 09:59:31,446 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 09:59:31,446 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 09:59:31,446 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 09:59:31,446 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 09:59:31,446 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 09:59:31,447 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 09:59:31,447 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 09:59:31,447 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 09:59:31,447 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 09:59:31,447 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 09:59:31,448 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 09:59:31,448 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 09:59:31,448 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 09:59:31,448 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 09:59:31,448 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 09:59:31,449 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 09:59:31,449 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 09:59:31,449 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 09:59:31,449 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 09:59:31,449 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 09:59:31,450 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 09:59:31,450 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 09:59:31,451 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 09:59:31,451 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 09:59:31,451 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 09:59:31,451 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 09:59:31,452 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 09:59:31,453 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 09:59:31,453 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 09:59:31,453 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 09:59:31,454 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 09:59:31,454 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 09:59:31,454 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 09:59:31,454 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 09:59:31,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 09:59:31,454 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-10-28 09:59:31,454 INFO L130 BoogieDeclarations]: Found specification of procedure inspect [2021-10-28 09:59:31,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 09:59:31,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 09:59:31,455 INFO L130 BoogieDeclarations]: Found specification of procedure create_tree [2021-10-28 09:59:31,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 09:59:31,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 09:59:31,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 09:59:31,456 INFO L130 BoogieDeclarations]: Found specification of procedure free_tree [2021-10-28 09:59:31,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 09:59:31,458 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 09:59:31,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 09:59:31,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:59:31,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:59:32,232 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:59:32,232 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-28 09:59:32,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:59:32 BoogieIcfgContainer [2021-10-28 09:59:32,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:59:32,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:59:32,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:59:32,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:59:32,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:59:30" (1/3) ... [2021-10-28 09:59:32,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@420842f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:59:32, skipping insertion in model container [2021-10-28 09:59:32,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:31" (2/3) ... [2021-10-28 09:59:32,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@420842f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:59:32, skipping insertion in model container [2021-10-28 09:59:32,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:59:32" (3/3) ... [2021-10-28 09:59:32,245 INFO L111 eAbstractionObserver]: Analyzing ICFG tree-4.i [2021-10-28 09:59:32,251 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:59:32,252 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 65 error locations. [2021-10-28 09:59:32,308 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:59:32,316 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 09:59:32,316 INFO L340 AbstractCegarLoop]: Starting to check reachability of 65 error locations. [2021-10-28 09:59:32,339 INFO L276 IsEmpty]: Start isEmpty. Operand has 164 states, 84 states have (on average 2.107142857142857) internal successors, (177), 152 states have internal predecessors, (177), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 09:59:32,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 09:59:32,349 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:32,350 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:32,350 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting create_treeErr8REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 09:59:32,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:32,357 INFO L85 PathProgramCache]: Analyzing trace with hash -557652933, now seen corresponding path program 1 times [2021-10-28 09:59:32,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:32,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795089729] [2021-10-28 09:59:32,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:32,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:32,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:32,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:32,624 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 09:59:32,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:32,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795089729] [2021-10-28 09:59:32,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795089729] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:32,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:32,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:59:32,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351059101] [2021-10-28 09:59:32,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:59:32,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:32,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:59:32,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:59:32,655 INFO L87 Difference]: Start difference. First operand has 164 states, 84 states have (on average 2.107142857142857) internal successors, (177), 152 states have internal predecessors, (177), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 09:59:33,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:33,049 INFO L93 Difference]: Finished difference Result 216 states and 237 transitions. [2021-10-28 09:59:33,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:59:33,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 10 [2021-10-28 09:59:33,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:33,065 INFO L225 Difference]: With dead ends: 216 [2021-10-28 09:59:33,065 INFO L226 Difference]: Without dead ends: 211 [2021-10-28 09:59:33,071 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:59:33,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-10-28 09:59:33,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 169. [2021-10-28 09:59:33,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 91 states have (on average 1.901098901098901) internal successors, (173), 157 states have internal predecessors, (173), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 09:59:33,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 186 transitions. [2021-10-28 09:59:33,133 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 186 transitions. Word has length 10 [2021-10-28 09:59:33,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:33,133 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 186 transitions. [2021-10-28 09:59:33,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 09:59:33,134 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 186 transitions. [2021-10-28 09:59:33,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:59:33,135 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:33,135 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:33,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:59:33,136 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting create_treeErr8REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 09:59:33,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:33,137 INFO L85 PathProgramCache]: Analyzing trace with hash -108387509, now seen corresponding path program 1 times [2021-10-28 09:59:33,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:33,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194482048] [2021-10-28 09:59:33,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:33,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:33,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:33,240 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 09:59:33,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:33,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194482048] [2021-10-28 09:59:33,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194482048] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:33,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:33,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:59:33,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690206213] [2021-10-28 09:59:33,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:59:33,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:33,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:59:33,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:59:33,245 INFO L87 Difference]: Start difference. First operand 169 states and 186 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 09:59:33,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:33,792 INFO L93 Difference]: Finished difference Result 209 states and 227 transitions. [2021-10-28 09:59:33,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:59:33,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2021-10-28 09:59:33,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:33,797 INFO L225 Difference]: With dead ends: 209 [2021-10-28 09:59:33,798 INFO L226 Difference]: Without dead ends: 209 [2021-10-28 09:59:33,798 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:59:33,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-10-28 09:59:33,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 169. [2021-10-28 09:59:33,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 91 states have (on average 1.8571428571428572) internal successors, (169), 157 states have internal predecessors, (169), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 09:59:33,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 182 transitions. [2021-10-28 09:59:33,826 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 182 transitions. Word has length 11 [2021-10-28 09:59:33,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:33,827 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 182 transitions. [2021-10-28 09:59:33,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 09:59:33,828 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 182 transitions. [2021-10-28 09:59:33,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:59:33,828 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:33,828 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:33,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 09:59:33,829 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting create_treeErr0REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 09:59:33,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:33,830 INFO L85 PathProgramCache]: Analyzing trace with hash -108386450, now seen corresponding path program 1 times [2021-10-28 09:59:33,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:33,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998256840] [2021-10-28 09:59:33,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:33,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:33,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:33,964 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 09:59:33,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:33,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998256840] [2021-10-28 09:59:33,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998256840] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:33,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:33,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:59:33,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873485438] [2021-10-28 09:59:33,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:59:33,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:33,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:59:33,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:59:33,977 INFO L87 Difference]: Start difference. First operand 169 states and 182 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 09:59:34,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:34,403 INFO L93 Difference]: Finished difference Result 206 states and 225 transitions. [2021-10-28 09:59:34,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:59:34,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2021-10-28 09:59:34,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:34,414 INFO L225 Difference]: With dead ends: 206 [2021-10-28 09:59:34,414 INFO L226 Difference]: Without dead ends: 206 [2021-10-28 09:59:34,416 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 09:59:34,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-10-28 09:59:34,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 162. [2021-10-28 09:59:34,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 93 states have (on average 1.7634408602150538) internal successors, (164), 150 states have internal predecessors, (164), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 09:59:34,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 177 transitions. [2021-10-28 09:59:34,447 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 177 transitions. Word has length 11 [2021-10-28 09:59:34,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:34,447 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 177 transitions. [2021-10-28 09:59:34,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 09:59:34,448 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 177 transitions. [2021-10-28 09:59:34,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:59:34,449 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:34,449 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:34,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 09:59:34,450 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting create_treeErr1REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 09:59:34,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:34,454 INFO L85 PathProgramCache]: Analyzing trace with hash -108386449, now seen corresponding path program 1 times [2021-10-28 09:59:34,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:34,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238448245] [2021-10-28 09:59:34,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:34,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:34,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:34,552 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 09:59:34,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:34,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238448245] [2021-10-28 09:59:34,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238448245] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:34,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:34,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:59:34,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641498714] [2021-10-28 09:59:34,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:59:34,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:34,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:59:34,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:59:34,556 INFO L87 Difference]: Start difference. First operand 162 states and 177 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 09:59:35,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:35,016 INFO L93 Difference]: Finished difference Result 225 states and 244 transitions. [2021-10-28 09:59:35,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:59:35,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2021-10-28 09:59:35,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:35,018 INFO L225 Difference]: With dead ends: 225 [2021-10-28 09:59:35,019 INFO L226 Difference]: Without dead ends: 225 [2021-10-28 09:59:35,019 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 09:59:35,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-10-28 09:59:35,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 173. [2021-10-28 09:59:35,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 108 states have (on average 1.6851851851851851) internal successors, (182), 161 states have internal predecessors, (182), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 09:59:35,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 195 transitions. [2021-10-28 09:59:35,036 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 195 transitions. Word has length 11 [2021-10-28 09:59:35,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:35,036 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 195 transitions. [2021-10-28 09:59:35,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 09:59:35,037 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 195 transitions. [2021-10-28 09:59:35,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 09:59:35,038 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:35,038 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:35,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 09:59:35,039 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting create_treeErr4REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 09:59:35,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:35,040 INFO L85 PathProgramCache]: Analyzing trace with hash 874689698, now seen corresponding path program 1 times [2021-10-28 09:59:35,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:35,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900532661] [2021-10-28 09:59:35,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:35,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:35,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:35,158 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 09:59:35,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:35,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900532661] [2021-10-28 09:59:35,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900532661] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:35,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:35,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:59:35,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853415227] [2021-10-28 09:59:35,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:59:35,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:35,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:59:35,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:59:35,163 INFO L87 Difference]: Start difference. First operand 173 states and 195 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 09:59:35,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:35,527 INFO L93 Difference]: Finished difference Result 220 states and 247 transitions. [2021-10-28 09:59:35,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:59:35,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2021-10-28 09:59:35,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:35,530 INFO L225 Difference]: With dead ends: 220 [2021-10-28 09:59:35,530 INFO L226 Difference]: Without dead ends: 220 [2021-10-28 09:59:35,531 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:59:35,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-10-28 09:59:35,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 177. [2021-10-28 09:59:35,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 112 states have (on average 1.6607142857142858) internal successors, (186), 165 states have internal predecessors, (186), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 09:59:35,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 199 transitions. [2021-10-28 09:59:35,540 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 199 transitions. Word has length 14 [2021-10-28 09:59:35,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:35,541 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 199 transitions. [2021-10-28 09:59:35,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 09:59:35,541 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 199 transitions. [2021-10-28 09:59:35,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:59:35,543 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:35,543 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] [2021-10-28 09:59:35,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 09:59:35,544 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 09:59:35,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:35,544 INFO L85 PathProgramCache]: Analyzing trace with hash -388091640, now seen corresponding path program 1 times [2021-10-28 09:59:35,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:35,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32396026] [2021-10-28 09:59:35,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:35,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:35,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:35,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 09:59:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:35,790 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 09:59:35,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:35,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32396026] [2021-10-28 09:59:35,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32396026] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:35,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:35,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 09:59:35,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64234100] [2021-10-28 09:59:35,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:59:35,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:35,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:59:35,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:59:35,793 INFO L87 Difference]: Start difference. First operand 177 states and 199 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 09:59:36,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:36,612 INFO L93 Difference]: Finished difference Result 220 states and 243 transitions. [2021-10-28 09:59:36,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:59:36,613 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-10-28 09:59:36,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:36,615 INFO L225 Difference]: With dead ends: 220 [2021-10-28 09:59:36,615 INFO L226 Difference]: Without dead ends: 213 [2021-10-28 09:59:36,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:59:36,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-10-28 09:59:36,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 170. [2021-10-28 09:59:36,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 106 states have (on average 1.6886792452830188) internal successors, (179), 159 states have internal predecessors, (179), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 09:59:36,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 191 transitions. [2021-10-28 09:59:36,623 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 191 transitions. Word has length 21 [2021-10-28 09:59:36,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:36,623 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 191 transitions. [2021-10-28 09:59:36,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 09:59:36,624 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 191 transitions. [2021-10-28 09:59:36,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 09:59:36,626 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:36,626 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:36,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 09:59:36,627 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting create_treeErr4REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 09:59:36,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:36,627 INFO L85 PathProgramCache]: Analyzing trace with hash 53276323, now seen corresponding path program 1 times [2021-10-28 09:59:36,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:36,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765069030] [2021-10-28 09:59:36,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:36,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:36,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:36,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:59:36,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:36,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765069030] [2021-10-28 09:59:36,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765069030] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:59:36,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230933813] [2021-10-28 09:59:36,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:36,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:59:36,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:59:36,827 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:59:36,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:59:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:36,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:59:36,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:59:37,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 09:59:37,282 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 09:59:37,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 09:59:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:59:37,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230933813] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:59:37,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:59:37,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-28 09:59:37,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839902302] [2021-10-28 09:59:37,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:59:37,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:37,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:59:37,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:59:37,522 INFO L87 Difference]: Start difference. First operand 170 states and 191 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:38,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:38,156 INFO L93 Difference]: Finished difference Result 222 states and 249 transitions. [2021-10-28 09:59:38,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:59:38,156 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-28 09:59:38,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:38,158 INFO L225 Difference]: With dead ends: 222 [2021-10-28 09:59:38,159 INFO L226 Difference]: Without dead ends: 222 [2021-10-28 09:59:38,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:59:38,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-10-28 09:59:38,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 169. [2021-10-28 09:59:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 106 states have (on average 1.679245283018868) internal successors, (178), 158 states have internal predecessors, (178), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 09:59:38,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 190 transitions. [2021-10-28 09:59:38,167 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 190 transitions. Word has length 23 [2021-10-28 09:59:38,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:38,167 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 190 transitions. [2021-10-28 09:59:38,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:38,168 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 190 transitions. [2021-10-28 09:59:38,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 09:59:38,169 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:38,169 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:38,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-28 09:59:38,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:59:38,398 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting create_treeErr5REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 09:59:38,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:38,399 INFO L85 PathProgramCache]: Analyzing trace with hash 53276324, now seen corresponding path program 1 times [2021-10-28 09:59:38,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:38,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452487337] [2021-10-28 09:59:38,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:38,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:38,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:38,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:59:38,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:38,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452487337] [2021-10-28 09:59:38,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452487337] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:59:38,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709235956] [2021-10-28 09:59:38,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:38,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:59:38,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:59:38,514 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:59:38,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:59:38,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:38,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 09:59:38,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:59:38,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 09:59:38,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 09:59:38,971 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 09:59:38,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-10-28 09:59:38,989 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:59:38,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-10-28 09:59:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:59:39,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709235956] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:59:39,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:59:39,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-28 09:59:39,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509362295] [2021-10-28 09:59:39,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:59:39,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:39,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:59:39,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:59:39,162 INFO L87 Difference]: Start difference. First operand 169 states and 190 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:39,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:39,887 INFO L93 Difference]: Finished difference Result 230 states and 249 transitions. [2021-10-28 09:59:39,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:59:39,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-28 09:59:39,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:39,890 INFO L225 Difference]: With dead ends: 230 [2021-10-28 09:59:39,890 INFO L226 Difference]: Without dead ends: 230 [2021-10-28 09:59:39,890 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:59:39,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-10-28 09:59:39,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 168. [2021-10-28 09:59:39,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 106 states have (on average 1.669811320754717) internal successors, (177), 157 states have internal predecessors, (177), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 09:59:39,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 189 transitions. [2021-10-28 09:59:39,898 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 189 transitions. Word has length 23 [2021-10-28 09:59:39,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:39,898 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 189 transitions. [2021-10-28 09:59:39,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:39,902 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 189 transitions. [2021-10-28 09:59:39,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 09:59:39,906 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:39,906 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, 1, 1, 1, 1, 1] [2021-10-28 09:59:39,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:59:40,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:59:40,134 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting create_treeErr14REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 09:59:40,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:40,134 INFO L85 PathProgramCache]: Analyzing trace with hash -190246733, now seen corresponding path program 1 times [2021-10-28 09:59:40,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:40,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572338713] [2021-10-28 09:59:40,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:40,135 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:40,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:40,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:40,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:59:40,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:40,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572338713] [2021-10-28 09:59:40,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572338713] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:40,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:40,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:59:40,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449096548] [2021-10-28 09:59:40,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:59:40,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:40,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:59:40,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:59:40,216 INFO L87 Difference]: Start difference. First operand 168 states and 189 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 09:59:40,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:40,754 INFO L93 Difference]: Finished difference Result 205 states and 228 transitions. [2021-10-28 09:59:40,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:59:40,755 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 26 [2021-10-28 09:59:40,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:40,757 INFO L225 Difference]: With dead ends: 205 [2021-10-28 09:59:40,757 INFO L226 Difference]: Without dead ends: 205 [2021-10-28 09:59:40,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:59:40,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-10-28 09:59:40,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 167. [2021-10-28 09:59:40,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 106 states have (on average 1.650943396226415) internal successors, (175), 156 states have internal predecessors, (175), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 09:59:40,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 187 transitions. [2021-10-28 09:59:40,765 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 187 transitions. Word has length 26 [2021-10-28 09:59:40,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:40,766 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 187 transitions. [2021-10-28 09:59:40,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 09:59:40,767 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 187 transitions. [2021-10-28 09:59:40,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 09:59:40,768 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:40,768 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, 1, 1, 1, 1, 1] [2021-10-28 09:59:40,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 09:59:40,769 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting create_treeErr15REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 09:59:40,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:40,769 INFO L85 PathProgramCache]: Analyzing trace with hash -190246732, now seen corresponding path program 1 times [2021-10-28 09:59:40,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:40,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666196267] [2021-10-28 09:59:40,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:40,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:40,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:59:40,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:40,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666196267] [2021-10-28 09:59:40,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666196267] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:40,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:40,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:59:40,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283820273] [2021-10-28 09:59:40,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:59:40,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:40,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:59:40,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:59:40,878 INFO L87 Difference]: Start difference. First operand 167 states and 187 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 09:59:41,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:41,461 INFO L93 Difference]: Finished difference Result 204 states and 226 transitions. [2021-10-28 09:59:41,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:59:41,462 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 26 [2021-10-28 09:59:41,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:41,464 INFO L225 Difference]: With dead ends: 204 [2021-10-28 09:59:41,464 INFO L226 Difference]: Without dead ends: 204 [2021-10-28 09:59:41,464 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:59:41,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-10-28 09:59:41,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 166. [2021-10-28 09:59:41,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 106 states have (on average 1.6320754716981132) internal successors, (173), 155 states have internal predecessors, (173), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 09:59:41,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 185 transitions. [2021-10-28 09:59:41,475 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 185 transitions. Word has length 26 [2021-10-28 09:59:41,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:41,475 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 185 transitions. [2021-10-28 09:59:41,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 09:59:41,476 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 185 transitions. [2021-10-28 09:59:41,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 09:59:41,480 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:41,480 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, 1, 1, 1, 1, 1] [2021-10-28 09:59:41,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 09:59:41,481 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 09:59:41,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:41,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1822618347, now seen corresponding path program 1 times [2021-10-28 09:59:41,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:41,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602580646] [2021-10-28 09:59:41,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:41,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:41,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:41,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 09:59:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:41,608 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 09:59:41,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:41,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602580646] [2021-10-28 09:59:41,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602580646] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:41,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:41,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:59:41,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761004268] [2021-10-28 09:59:41,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:59:41,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:41,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:59:41,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:59:41,611 INFO L87 Difference]: Start difference. First operand 166 states and 185 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 09:59:42,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:42,031 INFO L93 Difference]: Finished difference Result 210 states and 224 transitions. [2021-10-28 09:59:42,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:59:42,031 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-10-28 09:59:42,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:42,033 INFO L225 Difference]: With dead ends: 210 [2021-10-28 09:59:42,033 INFO L226 Difference]: Without dead ends: 210 [2021-10-28 09:59:42,034 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 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 09:59:42,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-10-28 09:59:42,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 165. [2021-10-28 09:59:42,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 105 states have (on average 1.619047619047619) internal successors, (170), 154 states have internal predecessors, (170), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 09:59:42,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 182 transitions. [2021-10-28 09:59:42,040 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 182 transitions. Word has length 26 [2021-10-28 09:59:42,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:42,040 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 182 transitions. [2021-10-28 09:59:42,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 09:59:42,041 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 182 transitions. [2021-10-28 09:59:42,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 09:59:42,049 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:42,049 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:42,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 09:59:42,049 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting create_treeErr18REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 09:59:42,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:42,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1716475476, now seen corresponding path program 1 times [2021-10-28 09:59:42,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:42,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877434661] [2021-10-28 09:59:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:42,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:42,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:42,238 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 09:59:42,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:42,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877434661] [2021-10-28 09:59:42,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877434661] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:42,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:42,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 09:59:42,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478889814] [2021-10-28 09:59:42,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:59:42,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:42,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:59:42,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:59:42,241 INFO L87 Difference]: Start difference. First operand 165 states and 182 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 09:59:43,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:43,043 INFO L93 Difference]: Finished difference Result 204 states and 222 transitions. [2021-10-28 09:59:43,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:59:43,044 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 29 [2021-10-28 09:59:43,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:43,046 INFO L225 Difference]: With dead ends: 204 [2021-10-28 09:59:43,046 INFO L226 Difference]: Without dead ends: 204 [2021-10-28 09:59:43,046 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:59:43,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-10-28 09:59:43,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 165. [2021-10-28 09:59:43,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 105 states have (on average 1.6095238095238096) internal successors, (169), 154 states have internal predecessors, (169), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 09:59:43,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 181 transitions. [2021-10-28 09:59:43,061 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 181 transitions. Word has length 29 [2021-10-28 09:59:43,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:43,064 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 181 transitions. [2021-10-28 09:59:43,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 09:59:43,064 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 181 transitions. [2021-10-28 09:59:43,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 09:59:43,067 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:43,067 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:43,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 09:59:43,068 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting create_treeErr19REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 09:59:43,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:43,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1716475477, now seen corresponding path program 1 times [2021-10-28 09:59:43,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:43,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739072228] [2021-10-28 09:59:43,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:43,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:43,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:43,300 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 09:59:43,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:43,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739072228] [2021-10-28 09:59:43,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739072228] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:43,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:43,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 09:59:43,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070845145] [2021-10-28 09:59:43,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:59:43,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:43,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:59:43,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:59:43,306 INFO L87 Difference]: Start difference. First operand 165 states and 181 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 09:59:44,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:44,070 INFO L93 Difference]: Finished difference Result 203 states and 221 transitions. [2021-10-28 09:59:44,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:59:44,071 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 29 [2021-10-28 09:59:44,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:44,073 INFO L225 Difference]: With dead ends: 203 [2021-10-28 09:59:44,073 INFO L226 Difference]: Without dead ends: 203 [2021-10-28 09:59:44,073 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:59:44,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-10-28 09:59:44,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 165. [2021-10-28 09:59:44,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 105 states have (on average 1.6) internal successors, (168), 154 states have internal predecessors, (168), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 09:59:44,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 180 transitions. [2021-10-28 09:59:44,080 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 180 transitions. Word has length 29 [2021-10-28 09:59:44,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:44,080 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 180 transitions. [2021-10-28 09:59:44,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 09:59:44,081 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 180 transitions. [2021-10-28 09:59:44,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 09:59:44,087 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:44,087 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:44,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 09:59:44,088 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting create_treeErr22REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 09:59:44,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:44,088 INFO L85 PathProgramCache]: Analyzing trace with hash -359646150, now seen corresponding path program 1 times [2021-10-28 09:59:44,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:44,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940041209] [2021-10-28 09:59:44,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:44,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:44,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:44,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:44,297 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 09:59:44,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:44,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940041209] [2021-10-28 09:59:44,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940041209] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:44,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:44,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 09:59:44,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278278005] [2021-10-28 09:59:44,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:59:44,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:44,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:59:44,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:59:44,303 INFO L87 Difference]: Start difference. First operand 165 states and 180 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 09:59:45,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:45,150 INFO L93 Difference]: Finished difference Result 204 states and 220 transitions. [2021-10-28 09:59:45,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:59:45,150 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 32 [2021-10-28 09:59:45,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:45,152 INFO L225 Difference]: With dead ends: 204 [2021-10-28 09:59:45,152 INFO L226 Difference]: Without dead ends: 204 [2021-10-28 09:59:45,153 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-10-28 09:59:45,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-10-28 09:59:45,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 165. [2021-10-28 09:59:45,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 105 states have (on average 1.5904761904761904) internal successors, (167), 154 states have internal predecessors, (167), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 09:59:45,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 179 transitions. [2021-10-28 09:59:45,160 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 179 transitions. Word has length 32 [2021-10-28 09:59:45,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:45,160 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 179 transitions. [2021-10-28 09:59:45,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 09:59:45,161 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 179 transitions. [2021-10-28 09:59:45,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 09:59:45,162 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:45,162 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:45,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 09:59:45,162 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting create_treeErr23REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 09:59:45,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:45,163 INFO L85 PathProgramCache]: Analyzing trace with hash -359646149, now seen corresponding path program 1 times [2021-10-28 09:59:45,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:45,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678576703] [2021-10-28 09:59:45,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:45,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:45,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:45,387 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 09:59:45,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:45,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678576703] [2021-10-28 09:59:45,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678576703] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:45,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:45,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 09:59:45,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105338639] [2021-10-28 09:59:45,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:59:45,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:45,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:59:45,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:59:45,390 INFO L87 Difference]: Start difference. First operand 165 states and 179 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 09:59:46,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:46,109 INFO L93 Difference]: Finished difference Result 203 states and 219 transitions. [2021-10-28 09:59:46,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:59:46,110 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 32 [2021-10-28 09:59:46,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:46,112 INFO L225 Difference]: With dead ends: 203 [2021-10-28 09:59:46,112 INFO L226 Difference]: Without dead ends: 203 [2021-10-28 09:59:46,113 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-10-28 09:59:46,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-10-28 09:59:46,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 165. [2021-10-28 09:59:46,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 105 states have (on average 1.5809523809523809) internal successors, (166), 154 states have internal predecessors, (166), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 09:59:46,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 178 transitions. [2021-10-28 09:59:46,121 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 178 transitions. Word has length 32 [2021-10-28 09:59:46,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:46,121 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 178 transitions. [2021-10-28 09:59:46,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 09:59:46,122 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 178 transitions. [2021-10-28 09:59:46,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 09:59:46,122 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:46,123 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:46,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-28 09:59:46,123 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting create_treeErr26REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 09:59:46,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:46,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1725030331, now seen corresponding path program 1 times [2021-10-28 09:59:46,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:46,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278484635] [2021-10-28 09:59:46,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:46,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:46,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:46,353 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 09:59:46,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:46,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278484635] [2021-10-28 09:59:46,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278484635] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:46,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:46,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 09:59:46,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096227983] [2021-10-28 09:59:46,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:59:46,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:46,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:59:46,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:59:46,356 INFO L87 Difference]: Start difference. First operand 165 states and 178 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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 09:59:47,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:47,041 INFO L93 Difference]: Finished difference Result 205 states and 219 transitions. [2021-10-28 09:59:47,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 09:59:47,041 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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 35 [2021-10-28 09:59:47,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:47,043 INFO L225 Difference]: With dead ends: 205 [2021-10-28 09:59:47,043 INFO L226 Difference]: Without dead ends: 205 [2021-10-28 09:59:47,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-10-28 09:59:47,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-10-28 09:59:47,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 165. [2021-10-28 09:59:47,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 105 states have (on average 1.5714285714285714) internal successors, (165), 154 states have internal predecessors, (165), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 09:59:47,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 177 transitions. [2021-10-28 09:59:47,050 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 177 transitions. Word has length 35 [2021-10-28 09:59:47,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:47,050 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 177 transitions. [2021-10-28 09:59:47,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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 09:59:47,051 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 177 transitions. [2021-10-28 09:59:47,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 09:59:47,051 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:47,051 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:47,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-28 09:59:47,052 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting create_treeErr27REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 09:59:47,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:47,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1725030332, now seen corresponding path program 1 times [2021-10-28 09:59:47,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:47,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307680870] [2021-10-28 09:59:47,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:47,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:47,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:47,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:47,276 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 09:59:47,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:47,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307680870] [2021-10-28 09:59:47,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307680870] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:47,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:47,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 09:59:47,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453429132] [2021-10-28 09:59:47,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:59:47,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:47,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:59:47,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:59:47,280 INFO L87 Difference]: Start difference. First operand 165 states and 177 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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 09:59:47,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:47,937 INFO L93 Difference]: Finished difference Result 203 states and 217 transitions. [2021-10-28 09:59:47,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:59:47,939 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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 35 [2021-10-28 09:59:47,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:47,940 INFO L225 Difference]: With dead ends: 203 [2021-10-28 09:59:47,940 INFO L226 Difference]: Without dead ends: 203 [2021-10-28 09:59:47,941 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:59:47,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-10-28 09:59:47,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 165. [2021-10-28 09:59:47,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 105 states have (on average 1.561904761904762) internal successors, (164), 154 states have internal predecessors, (164), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 09:59:47,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 176 transitions. [2021-10-28 09:59:47,950 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 176 transitions. Word has length 35 [2021-10-28 09:59:47,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:47,951 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 176 transitions. [2021-10-28 09:59:47,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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 09:59:47,951 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 176 transitions. [2021-10-28 09:59:47,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 09:59:47,952 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:47,952 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:59:47,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 09:59:47,953 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting create_treeErr10REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 09:59:47,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:47,954 INFO L85 PathProgramCache]: Analyzing trace with hash 11285986, now seen corresponding path program 1 times [2021-10-28 09:59:47,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:47,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251030343] [2021-10-28 09:59:47,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:47,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:47,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:48,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:48,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:59:48,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:48,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251030343] [2021-10-28 09:59:48,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251030343] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:59:48,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788407080] [2021-10-28 09:59:48,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:48,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:59:48,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:59:48,344 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:59:48,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:59:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:48,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-28 09:59:48,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:59:48,556 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-28 09:59:48,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 24 [2021-10-28 09:59:48,744 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-10-28 09:59:48,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 30 [2021-10-28 09:59:48,887 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 13 treesize of output 9 [2021-10-28 09:59:48,897 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 13 treesize of output 9 [2021-10-28 09:59:49,049 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-10-28 09:59:49,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-10-28 09:59:49,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:59:49,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-10-28 09:59:49,259 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-28 09:59:49,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-28 09:59:49,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:59:49,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-28 09:59:49,411 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-10-28 09:59:49,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 49 [2021-10-28 09:59:49,577 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-10-28 09:59:49,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 54 [2021-10-28 09:59:49,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:59:49,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:59:49,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:59:49,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-10-28 09:59:50,099 INFO L354 Elim1Store]: treesize reduction 116, result has 18.3 percent of original size [2021-10-28 09:59:50,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 93 [2021-10-28 09:59:50,126 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-10-28 09:59:50,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 99 [2021-10-28 09:59:50,680 INFO L354 Elim1Store]: treesize reduction 188, result has 14.9 percent of original size [2021-10-28 09:59:50,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 135 treesize of output 114 [2021-10-28 09:59:50,722 INFO L354 Elim1Store]: treesize reduction 156, result has 16.1 percent of original size [2021-10-28 09:59:50,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 127 treesize of output 128 [2021-10-28 09:59:55,295 INFO L354 Elim1Store]: treesize reduction 218, result has 15.8 percent of original size [2021-10-28 09:59:55,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 159 treesize of output 136 [2021-10-28 09:59:55,346 INFO L354 Elim1Store]: treesize reduction 190, result has 16.7 percent of original size [2021-10-28 09:59:55,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 118 [2021-10-28 09:59:55,681 INFO L354 Elim1Store]: treesize reduction 128, result has 16.9 percent of original size [2021-10-28 09:59:55,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 127 treesize of output 111 [2021-10-28 09:59:55,708 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-10-28 09:59:55,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 117 [2021-10-28 09:59:55,732 INFO L354 Elim1Store]: treesize reduction 44, result has 27.9 percent of original size [2021-10-28 09:59:55,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 111 treesize of output 115 [2021-10-28 09:59:55,914 INFO L354 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2021-10-28 09:59:55,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 97 treesize of output 60 [2021-10-28 09:59:55,923 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-28 09:59:55,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 31 [2021-10-28 09:59:55,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:59:55,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788407080] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:59:55,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:59:55,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 29 [2021-10-28 09:59:55,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105715627] [2021-10-28 09:59:55,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 09:59:55,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:55,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 09:59:55,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=679, Unknown=2, NotChecked=0, Total=812 [2021-10-28 09:59:55,950 INFO L87 Difference]: Start difference. First operand 165 states and 176 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 10:00:17,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:00:17,252 INFO L93 Difference]: Finished difference Result 234 states and 248 transitions. [2021-10-28 10:00:17,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 10:00:17,253 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2021-10-28 10:00:17,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:00:17,255 INFO L225 Difference]: With dead ends: 234 [2021-10-28 10:00:17,255 INFO L226 Difference]: Without dead ends: 234 [2021-10-28 10:00:17,257 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=403, Invalid=2138, Unknown=9, NotChecked=0, Total=2550 [2021-10-28 10:00:17,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-10-28 10:00:17,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 191. [2021-10-28 10:00:17,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 131 states have (on average 1.4580152671755726) internal successors, (191), 180 states have internal predecessors, (191), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 10:00:17,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 203 transitions. [2021-10-28 10:00:17,265 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 203 transitions. Word has length 40 [2021-10-28 10:00:17,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:00:17,266 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 203 transitions. [2021-10-28 10:00:17,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 10:00:17,266 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 203 transitions. [2021-10-28 10:00:17,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 10:00:17,267 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:00:17,267 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, 1, 1, 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 10:00:17,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 10:00:17,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 10:00:17,498 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 10:00:17,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:00:17,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1714624533, now seen corresponding path program 1 times [2021-10-28 10:00:17,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:00:17,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646586365] [2021-10-28 10:00:17,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:00:17,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:00:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:00:17,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:00:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:00:17,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 10:00:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:00:17,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 10:00:17,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:00:17,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646586365] [2021-10-28 10:00:17,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646586365] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 10:00:17,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 10:00:17,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 10:00:17,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466191033] [2021-10-28 10:00:17,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 10:00:17,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:00:17,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 10:00:17,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-28 10:00:17,663 INFO L87 Difference]: Start difference. First operand 191 states and 203 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 10:00:18,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:00:18,329 INFO L93 Difference]: Finished difference Result 230 states and 243 transitions. [2021-10-28 10:00:18,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 10:00:18,329 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2021-10-28 10:00:18,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:00:18,332 INFO L225 Difference]: With dead ends: 230 [2021-10-28 10:00:18,332 INFO L226 Difference]: Without dead ends: 230 [2021-10-28 10:00:18,332 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-28 10:00:18,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-10-28 10:00:18,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 191. [2021-10-28 10:00:18,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 131 states have (on average 1.4427480916030535) internal successors, (189), 180 states have internal predecessors, (189), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 10:00:18,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 201 transitions. [2021-10-28 10:00:18,340 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 201 transitions. Word has length 45 [2021-10-28 10:00:18,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:00:18,340 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 201 transitions. [2021-10-28 10:00:18,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 10:00:18,340 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 201 transitions. [2021-10-28 10:00:18,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-28 10:00:18,341 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:00:18,341 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, 1, 1, 1, 1, 1, 1, 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 10:00:18,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-28 10:00:18,342 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 10:00:18,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:00:18,342 INFO L85 PathProgramCache]: Analyzing trace with hash 2037935847, now seen corresponding path program 1 times [2021-10-28 10:00:18,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:00:18,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431078359] [2021-10-28 10:00:18,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:00:18,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:00:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:00:18,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:00:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:00:18,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 10:00:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:00:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 10:00:18,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:00:18,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431078359] [2021-10-28 10:00:18,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431078359] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 10:00:18,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 10:00:18,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 10:00:18,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348776311] [2021-10-28 10:00:18,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 10:00:18,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:00:18,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 10:00:18,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-28 10:00:18,535 INFO L87 Difference]: Start difference. First operand 191 states and 201 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 10:00:19,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:00:19,350 INFO L93 Difference]: Finished difference Result 253 states and 268 transitions. [2021-10-28 10:00:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 10:00:19,350 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2021-10-28 10:00:19,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:00:19,352 INFO L225 Difference]: With dead ends: 253 [2021-10-28 10:00:19,352 INFO L226 Difference]: Without dead ends: 253 [2021-10-28 10:00:19,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-10-28 10:00:19,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-10-28 10:00:19,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 191. [2021-10-28 10:00:19,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 132 states have (on average 1.4318181818181819) internal successors, (189), 180 states have internal predecessors, (189), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 10:00:19,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 200 transitions. [2021-10-28 10:00:19,361 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 200 transitions. Word has length 49 [2021-10-28 10:00:19,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:00:19,361 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 200 transitions. [2021-10-28 10:00:19,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 10:00:19,362 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 200 transitions. [2021-10-28 10:00:19,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-28 10:00:19,363 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:00:19,363 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, 1, 1, 1, 1, 1, 1, 1, 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 10:00:19,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-28 10:00:19,364 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting inspectErr0REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 10:00:19,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:00:19,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1248564646, now seen corresponding path program 1 times [2021-10-28 10:00:19,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:00:19,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777672115] [2021-10-28 10:00:19,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:00:19,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:00:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:00:19,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:00:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:00:19,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 10:00:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:00:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:00:19,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:00:19,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777672115] [2021-10-28 10:00:19,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777672115] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:00:19,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293235155] [2021-10-28 10:00:19,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:00:19,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:00:19,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:00:19,546 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:00:19,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 10:00:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:00:19,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 10:00:19,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:00:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:00:20,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293235155] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:00:20,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:00:20,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 11 [2021-10-28 10:00:20,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486933853] [2021-10-28 10:00:20,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 10:00:20,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:00:20,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 10:00:20,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-10-28 10:00:20,038 INFO L87 Difference]: Start difference. First operand 191 states and 200 transitions. Second operand has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 10:00:20,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:00:20,798 INFO L93 Difference]: Finished difference Result 229 states and 241 transitions. [2021-10-28 10:00:20,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 10:00:20,799 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2021-10-28 10:00:20,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:00:20,800 INFO L225 Difference]: With dead ends: 229 [2021-10-28 10:00:20,801 INFO L226 Difference]: Without dead ends: 229 [2021-10-28 10:00:20,801 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-10-28 10:00:20,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-10-28 10:00:20,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 189. [2021-10-28 10:00:20,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 133 states have (on average 1.413533834586466) internal successors, (188), 178 states have internal predecessors, (188), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 10:00:20,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 199 transitions. [2021-10-28 10:00:20,808 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 199 transitions. Word has length 50 [2021-10-28 10:00:20,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:00:20,809 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 199 transitions. [2021-10-28 10:00:20,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 10:00:20,810 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 199 transitions. [2021-10-28 10:00:20,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-28 10:00:20,810 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:00:20,811 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, 1, 1, 1, 1, 1, 1, 1, 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 10:00:20,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 10:00:21,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:00:21,034 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting inspectErr1REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 10:00:21,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:00:21,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1248564645, now seen corresponding path program 1 times [2021-10-28 10:00:21,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:00:21,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101231983] [2021-10-28 10:00:21,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:00:21,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:00:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:00:21,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:00:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:00:21,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 10:00:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:00:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:00:21,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:00:21,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101231983] [2021-10-28 10:00:21,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101231983] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:00:21,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540869081] [2021-10-28 10:00:21,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:00:21,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:00:21,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:00:21,352 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:00:21,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 10:00:21,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:00:21,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 10:00:21,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:00:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:00:22,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540869081] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:00:22,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:00:22,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-10-28 10:00:22,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704730977] [2021-10-28 10:00:22,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 10:00:22,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:00:22,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 10:00:22,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-10-28 10:00:22,338 INFO L87 Difference]: Start difference. First operand 189 states and 199 transitions. Second operand has 20 states, 19 states have (on average 4.526315789473684) internal successors, (86), 14 states have internal predecessors, (86), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 10:00:23,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:00:23,669 INFO L93 Difference]: Finished difference Result 244 states and 259 transitions. [2021-10-28 10:00:23,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 10:00:23,672 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.526315789473684) internal successors, (86), 14 states have internal predecessors, (86), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-10-28 10:00:23,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:00:23,674 INFO L225 Difference]: With dead ends: 244 [2021-10-28 10:00:23,675 INFO L226 Difference]: Without dead ends: 244 [2021-10-28 10:00:23,675 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-10-28 10:00:23,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-10-28 10:00:23,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 191. [2021-10-28 10:00:23,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 135 states have (on average 1.4074074074074074) internal successors, (190), 180 states have internal predecessors, (190), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 10:00:23,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 201 transitions. [2021-10-28 10:00:23,683 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 201 transitions. Word has length 50 [2021-10-28 10:00:23,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:00:23,684 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 201 transitions. [2021-10-28 10:00:23,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.526315789473684) internal successors, (86), 14 states have internal predecessors, (86), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 10:00:23,684 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 201 transitions. [2021-10-28 10:00:23,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-28 10:00:23,685 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:00:23,686 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:00:23,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-28 10:00:23,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:00:23,902 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting create_treeErr10REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 10:00:23,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:00:23,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1489839671, now seen corresponding path program 1 times [2021-10-28 10:00:23,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:00:23,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465462764] [2021-10-28 10:00:23,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:00:23,903 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:00:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:00:24,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:00:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:00:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:00:24,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:00:24,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465462764] [2021-10-28 10:00:24,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465462764] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:00:24,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729863177] [2021-10-28 10:00:24,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:00:24,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:00:24,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:00:24,346 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:00:24,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 10:00:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:00:24,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-28 10:00:24,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:00:24,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 10:00:24,920 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 10:00:24,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 10:00:25,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 10:00:25,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 10:00:25,120 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-28 10:00:25,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 49 [2021-10-28 10:00:25,132 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-10-28 10:00:25,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 60 [2021-10-28 10:00:25,264 INFO L354 Elim1Store]: treesize reduction 80, result has 17.5 percent of original size [2021-10-28 10:00:25,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 67 [2021-10-28 10:00:25,299 INFO L354 Elim1Store]: treesize reduction 104, result has 18.1 percent of original size [2021-10-28 10:00:25,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 63 [2021-10-28 10:00:25,507 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-28 10:00:25,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 70 [2021-10-28 10:00:25,545 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-28 10:00:25,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 81 [2021-10-28 10:00:25,682 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-10-28 10:00:25,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-10-28 10:00:25,848 INFO L354 Elim1Store]: treesize reduction 138, result has 18.8 percent of original size [2021-10-28 10:00:25,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 121 [2021-10-28 10:00:25,885 INFO L354 Elim1Store]: treesize reduction 108, result has 19.4 percent of original size [2021-10-28 10:00:25,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 89 [2021-10-28 10:00:26,345 INFO L354 Elim1Store]: treesize reduction 180, result has 15.5 percent of original size [2021-10-28 10:00:26,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 144 treesize of output 110 [2021-10-28 10:00:26,402 INFO L354 Elim1Store]: treesize reduction 178, result has 15.2 percent of original size [2021-10-28 10:00:26,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 137 [2021-10-28 10:00:26,927 INFO L354 Elim1Store]: treesize reduction 268, result has 13.0 percent of original size [2021-10-28 10:00:26,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 170 treesize of output 131 [2021-10-28 10:00:26,999 INFO L354 Elim1Store]: treesize reduction 272, result has 13.7 percent of original size [2021-10-28 10:00:26,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 162 treesize of output 166 [2021-10-28 10:00:31,554 INFO L354 Elim1Store]: treesize reduction 306, result has 13.6 percent of original size [2021-10-28 10:00:31,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 194 treesize of output 153 [2021-10-28 10:00:31,646 INFO L354 Elim1Store]: treesize reduction 318, result has 13.8 percent of original size [2021-10-28 10:00:31,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 169 treesize of output 156 [2021-10-28 10:00:31,957 INFO L354 Elim1Store]: treesize reduction 196, result has 14.4 percent of original size [2021-10-28 10:00:31,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 148 treesize of output 114 [2021-10-28 10:00:31,996 INFO L354 Elim1Store]: treesize reduction 190, result has 14.4 percent of original size [2021-10-28 10:00:31,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 141 [2021-10-28 10:00:32,251 INFO L354 Elim1Store]: treesize reduction 132, result has 0.8 percent of original size [2021-10-28 10:00:32,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 155 treesize of output 89 [2021-10-28 10:00:32,262 INFO L354 Elim1Store]: treesize reduction 74, result has 1.3 percent of original size [2021-10-28 10:00:32,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 50 [2021-10-28 10:00:32,515 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-10-28 10:00:32,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 42 [2021-10-28 10:00:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:00:32,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729863177] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:00:32,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:00:32,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 34 [2021-10-28 10:00:32,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136026281] [2021-10-28 10:00:32,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 10:00:32,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:00:32,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 10:00:32,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1009, Unknown=2, NotChecked=0, Total=1190 [2021-10-28 10:00:32,653 INFO L87 Difference]: Start difference. First operand 191 states and 201 transitions. Second operand has 35 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 34 states have internal predecessors, (89), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 10:00:54,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:00:54,832 INFO L93 Difference]: Finished difference Result 276 states and 291 transitions. [2021-10-28 10:00:54,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-28 10:00:54,833 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 34 states have internal predecessors, (89), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-10-28 10:00:54,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:00:54,839 INFO L225 Difference]: With dead ends: 276 [2021-10-28 10:00:54,839 INFO L226 Difference]: Without dead ends: 276 [2021-10-28 10:00:54,842 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=784, Invalid=3367, Unknown=9, NotChecked=0, Total=4160 [2021-10-28 10:00:54,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-10-28 10:00:54,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 194. [2021-10-28 10:00:54,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 138 states have (on average 1.4130434782608696) internal successors, (195), 183 states have internal predecessors, (195), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 10:00:54,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 206 transitions. [2021-10-28 10:00:54,855 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 206 transitions. Word has length 50 [2021-10-28 10:00:54,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:00:54,857 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 206 transitions. [2021-10-28 10:00:54,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 34 states have internal predecessors, (89), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 10:00:54,857 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 206 transitions. [2021-10-28 10:00:54,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-28 10:00:54,858 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:00:54,858 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:00:54,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 10:00:55,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 10:00:55,082 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting create_treeErr11REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 10:00:55,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:00:55,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1489839672, now seen corresponding path program 1 times [2021-10-28 10:00:55,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:00:55,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205343719] [2021-10-28 10:00:55,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:00:55,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:00:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:00:55,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:00:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:00:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:00:55,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:00:55,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205343719] [2021-10-28 10:00:55,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205343719] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:00:55,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61829330] [2021-10-28 10:00:55,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:00:55,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:00:55,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:00:55,664 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:00:55,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 10:00:56,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:00:56,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-28 10:00:56,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:00:56,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 10:00:56,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 10:00:56,200 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 10:00:56,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-28 10:00:56,222 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 10:00:56,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 10:00:56,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 10:00:56,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 10:00:56,449 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-10-28 10:00:56,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 70 [2021-10-28 10:00:56,464 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-10-28 10:00:56,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 78 [2021-10-28 10:00:56,585 INFO L354 Elim1Store]: treesize reduction 112, result has 18.2 percent of original size [2021-10-28 10:00:56,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 88 [2021-10-28 10:00:56,603 INFO L354 Elim1Store]: treesize reduction 104, result has 18.1 percent of original size [2021-10-28 10:00:56,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 81 [2021-10-28 10:00:56,817 INFO L354 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-10-28 10:00:56,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 91 [2021-10-28 10:00:56,848 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-28 10:00:56,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 99 [2021-10-28 10:00:56,983 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-10-28 10:00:56,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-10-28 10:00:57,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2021-10-28 10:00:57,161 INFO L354 Elim1Store]: treesize reduction 148, result has 18.7 percent of original size [2021-10-28 10:00:57,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 126 [2021-10-28 10:00:57,191 INFO L354 Elim1Store]: treesize reduction 138, result has 18.8 percent of original size [2021-10-28 10:00:57,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 153 treesize of output 149 [2021-10-28 10:00:57,621 INFO L354 Elim1Store]: treesize reduction 180, result has 15.5 percent of original size [2021-10-28 10:00:57,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 164 treesize of output 120 [2021-10-28 10:00:57,669 INFO L354 Elim1Store]: treesize reduction 178, result has 15.2 percent of original size [2021-10-28 10:00:57,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 157 [2021-10-28 10:00:58,220 INFO L354 Elim1Store]: treesize reduction 268, result has 13.0 percent of original size [2021-10-28 10:00:58,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 190 treesize of output 141 [2021-10-28 10:00:58,283 INFO L354 Elim1Store]: treesize reduction 272, result has 13.7 percent of original size [2021-10-28 10:00:58,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 182 treesize of output 186 [2021-10-28 10:01:02,840 INFO L354 Elim1Store]: treesize reduction 306, result has 13.6 percent of original size [2021-10-28 10:01:02,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 214 treesize of output 163 [2021-10-28 10:01:02,906 INFO L354 Elim1Store]: treesize reduction 318, result has 13.8 percent of original size [2021-10-28 10:01:02,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 189 treesize of output 176 [2021-10-28 10:01:03,263 INFO L354 Elim1Store]: treesize reduction 196, result has 14.4 percent of original size [2021-10-28 10:01:03,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 168 treesize of output 124 [2021-10-28 10:01:03,299 INFO L354 Elim1Store]: treesize reduction 190, result has 14.4 percent of original size [2021-10-28 10:01:03,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 160 treesize of output 161 [2021-10-28 10:01:03,563 INFO L354 Elim1Store]: treesize reduction 132, result has 0.8 percent of original size [2021-10-28 10:01:03,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 180 treesize of output 104 [2021-10-28 10:01:03,575 INFO L354 Elim1Store]: treesize reduction 74, result has 1.3 percent of original size [2021-10-28 10:01:03,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 65 [2021-10-28 10:01:03,899 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-10-28 10:01:03,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 62 [2021-10-28 10:01:03,929 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-10-28 10:01:03,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 57 [2021-10-28 10:01:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:01:04,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61829330] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:04,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:01:04,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 34 [2021-10-28 10:01:04,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559147158] [2021-10-28 10:01:04,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 10:01:04,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:01:04,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 10:01:04,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1025, Unknown=2, NotChecked=0, Total=1190 [2021-10-28 10:01:04,070 INFO L87 Difference]: Start difference. First operand 194 states and 206 transitions. Second operand has 35 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 34 states have internal predecessors, (83), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 10:01:11,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:01:11,539 INFO L93 Difference]: Finished difference Result 300 states and 316 transitions. [2021-10-28 10:01:11,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-28 10:01:11,539 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 34 states have internal predecessors, (83), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-10-28 10:01:11,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:01:11,542 INFO L225 Difference]: With dead ends: 300 [2021-10-28 10:01:11,542 INFO L226 Difference]: Without dead ends: 300 [2021-10-28 10:01:11,545 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=1132, Invalid=5186, Unknown=2, NotChecked=0, Total=6320 [2021-10-28 10:01:11,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-10-28 10:01:11,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 209. [2021-10-28 10:01:11,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 153 states have (on average 1.4052287581699345) internal successors, (215), 198 states have internal predecessors, (215), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 10:01:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 226 transitions. [2021-10-28 10:01:11,554 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 226 transitions. Word has length 50 [2021-10-28 10:01:11,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:01:11,555 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 226 transitions. [2021-10-28 10:01:11,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 34 states have internal predecessors, (83), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 10:01:11,555 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 226 transitions. [2021-10-28 10:01:11,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-28 10:01:11,556 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:01:11,556 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:01:11,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 10:01:11,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 10:01:11,782 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting inspectErr7REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 10:01:11,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:01:11,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1574744257, now seen corresponding path program 1 times [2021-10-28 10:01:11,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:01:11,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124831814] [2021-10-28 10:01:11,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:11,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:01:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:11,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:01:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:11,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 10:01:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:01:12,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:01:12,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124831814] [2021-10-28 10:01:12,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124831814] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:12,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977497240] [2021-10-28 10:01:12,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:12,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:01:12,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:01:12,166 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:01:12,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 10:01:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:12,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-28 10:01:12,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:01:12,815 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-28 10:01:12,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 24 [2021-10-28 10:01:13,624 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 10:01:13,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 25 [2021-10-28 10:01:13,945 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2021-10-28 10:01:13,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 72 [2021-10-28 10:01:14,338 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-28 10:01:14,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 27 [2021-10-28 10:01:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:01:14,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977497240] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:14,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:01:14,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2021-10-28 10:01:14,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540309571] [2021-10-28 10:01:14,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 10:01:14,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:01:14,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 10:01:14,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2021-10-28 10:01:14,384 INFO L87 Difference]: Start difference. First operand 209 states and 226 transitions. Second operand has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 22 states have internal predecessors, (92), 4 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 10:01:18,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:01:18,345 INFO L93 Difference]: Finished difference Result 311 states and 339 transitions. [2021-10-28 10:01:18,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 10:01:18,347 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 22 states have internal predecessors, (92), 4 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2021-10-28 10:01:18,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:01:18,349 INFO L225 Difference]: With dead ends: 311 [2021-10-28 10:01:18,349 INFO L226 Difference]: Without dead ends: 311 [2021-10-28 10:01:18,351 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=314, Invalid=2548, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 10:01:18,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-10-28 10:01:18,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 250. [2021-10-28 10:01:18,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 191 states have (on average 1.4240837696335078) internal successors, (272), 237 states have internal predecessors, (272), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-28 10:01:18,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 286 transitions. [2021-10-28 10:01:18,362 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 286 transitions. Word has length 52 [2021-10-28 10:01:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:01:18,363 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 286 transitions. [2021-10-28 10:01:18,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 22 states have internal predecessors, (92), 4 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 10:01:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 286 transitions. [2021-10-28 10:01:18,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-28 10:01:18,364 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:01:18,365 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:01:18,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 10:01:18,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 10:01:18,584 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting inspectErr4REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 10:01:18,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:01:18,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1572456405, now seen corresponding path program 1 times [2021-10-28 10:01:18,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:01:18,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560019462] [2021-10-28 10:01:18,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:18,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:01:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:18,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:01:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:18,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 10:01:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:01:19,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:01:19,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560019462] [2021-10-28 10:01:19,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560019462] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:19,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020194726] [2021-10-28 10:01:19,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:19,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:01:19,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:01:19,178 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:01:19,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 10:01:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:19,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-28 10:01:19,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:01:20,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 10:01:20,267 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 10:01:20,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 10:01:20,322 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 16 treesize of output 12 [2021-10-28 10:01:20,473 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 10:01:20,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-10-28 10:01:20,647 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-10-28 10:01:20,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 34 [2021-10-28 10:01:26,901 INFO L354 Elim1Store]: treesize reduction 74, result has 23.7 percent of original size [2021-10-28 10:01:26,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 53 [2021-10-28 10:01:27,113 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 10:01:27,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-10-28 10:01:27,809 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-28 10:01:27,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 28 [2021-10-28 10:01:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:01:27,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020194726] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:27,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:01:27,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-10-28 10:01:27,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796954681] [2021-10-28 10:01:27,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-28 10:01:27,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:01:27,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-28 10:01:27,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1301, Unknown=2, NotChecked=0, Total=1406 [2021-10-28 10:01:27,817 INFO L87 Difference]: Start difference. First operand 250 states and 286 transitions. Second operand has 38 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 32 states have internal predecessors, (91), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 10:01:52,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:01:52,662 INFO L93 Difference]: Finished difference Result 337 states and 383 transitions. [2021-10-28 10:01:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 10:01:52,663 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 32 states have internal predecessors, (91), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2021-10-28 10:01:52,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:01:52,665 INFO L225 Difference]: With dead ends: 337 [2021-10-28 10:01:52,665 INFO L226 Difference]: Without dead ends: 337 [2021-10-28 10:01:52,667 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=413, Invalid=3610, Unknown=9, NotChecked=0, Total=4032 [2021-10-28 10:01:52,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-10-28 10:01:52,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 284. [2021-10-28 10:01:52,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 222 states have (on average 1.427927927927928) internal successors, (317), 269 states have internal predecessors, (317), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 10:01:52,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 334 transitions. [2021-10-28 10:01:52,680 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 334 transitions. Word has length 53 [2021-10-28 10:01:52,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:01:52,681 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 334 transitions. [2021-10-28 10:01:52,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 32 states have internal predecessors, (91), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 10:01:52,681 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 334 transitions. [2021-10-28 10:01:52,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-28 10:01:52,682 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:01:52,683 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:01:52,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 10:01:52,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 10:01:52,910 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting inspectErr5REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 10:01:52,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:01:52,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1572456404, now seen corresponding path program 1 times [2021-10-28 10:01:52,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:01:52,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356186852] [2021-10-28 10:01:52,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:52,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:01:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:53,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:01:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:53,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 10:01:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:01:53,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:01:53,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356186852] [2021-10-28 10:01:53,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356186852] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:53,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128858382] [2021-10-28 10:01:53,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:53,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:01:53,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:01:53,710 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:01:53,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 10:01:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:54,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-28 10:01:54,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:01:54,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 10:01:54,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 10:01:54,856 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 10:01:54,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 10:01:54,912 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 21 treesize of output 17 [2021-10-28 10:01:54,920 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 10:01:55,124 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 10:01:55,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-10-28 10:01:55,138 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-28 10:01:55,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-28 10:01:55,475 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-10-28 10:01:55,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 66 [2021-10-28 10:01:55,503 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-28 10:01:55,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 79 [2021-10-28 10:01:59,905 INFO L354 Elim1Store]: treesize reduction 74, result has 23.7 percent of original size [2021-10-28 10:01:59,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 88 [2021-10-28 10:01:59,942 INFO L354 Elim1Store]: treesize reduction 98, result has 21.6 percent of original size [2021-10-28 10:01:59,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 69 [2021-10-28 10:02:00,169 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 10:02:00,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-10-28 10:02:00,185 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-28 10:02:00,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 54 [2021-10-28 10:02:01,388 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-28 10:02:01,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 56 [2021-10-28 10:02:01,400 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-28 10:02:01,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 31 [2021-10-28 10:02:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:02:01,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128858382] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:02:01,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:02:01,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-10-28 10:02:01,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653364577] [2021-10-28 10:02:01,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-28 10:02:01,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:02:01,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-28 10:02:01,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1229, Unknown=2, NotChecked=0, Total=1332 [2021-10-28 10:02:01,411 INFO L87 Difference]: Start difference. First operand 284 states and 334 transitions. Second operand has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 31 states have internal predecessors, (91), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 10:02:06,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:02:06,055 INFO L93 Difference]: Finished difference Result 339 states and 383 transitions. [2021-10-28 10:02:06,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 10:02:06,056 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 31 states have internal predecessors, (91), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2021-10-28 10:02:06,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:02:06,059 INFO L225 Difference]: With dead ends: 339 [2021-10-28 10:02:06,059 INFO L226 Difference]: Without dead ends: 339 [2021-10-28 10:02:06,061 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=348, Invalid=3072, Unknown=2, NotChecked=0, Total=3422 [2021-10-28 10:02:06,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-10-28 10:02:06,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 284. [2021-10-28 10:02:06,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 222 states have (on average 1.4189189189189189) internal successors, (315), 269 states have internal predecessors, (315), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 10:02:06,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 332 transitions. [2021-10-28 10:02:06,073 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 332 transitions. Word has length 53 [2021-10-28 10:02:06,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:02:06,073 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 332 transitions. [2021-10-28 10:02:06,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 31 states have internal predecessors, (91), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 10:02:06,074 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 332 transitions. [2021-10-28 10:02:06,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-28 10:02:06,075 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:02:06,075 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:02:06,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 10:02:06,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 10:02:06,298 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 10:02:06,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:02:06,298 INFO L85 PathProgramCache]: Analyzing trace with hash 159681268, now seen corresponding path program 1 times [2021-10-28 10:02:06,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:02:06,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977606723] [2021-10-28 10:02:06,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:02:06,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:02:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:02:06,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:02:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:02:06,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 10:02:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:02:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:02:06,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:02:06,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977606723] [2021-10-28 10:02:06,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977606723] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:02:06,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904304953] [2021-10-28 10:02:06,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:02:06,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:02:06,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:02:06,993 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:02:06,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 10:02:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:02:07,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 53 conjunts are in the unsatisfiable core [2021-10-28 10:02:07,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:02:07,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 10:02:07,899 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 10:02:07,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 10:02:07,944 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 16 treesize of output 12 [2021-10-28 10:02:08,110 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 10:02:08,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-10-28 10:02:08,336 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-10-28 10:02:08,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 34 [2021-10-28 10:02:14,585 INFO L354 Elim1Store]: treesize reduction 94, result has 22.3 percent of original size [2021-10-28 10:02:14,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 104 [2021-10-28 10:02:14,589 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 96 treesize of output 88 [2021-10-28 10:02:14,607 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-10-28 10:02:14,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 74 [2021-10-28 10:02:14,817 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 10:02:14,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 76 [2021-10-28 10:02:14,831 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-28 10:02:14,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 89 [2021-10-28 10:02:14,842 INFO L354 Elim1Store]: treesize reduction 53, result has 24.3 percent of original size [2021-10-28 10:02:14,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 62 [2021-10-28 10:02:15,896 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-28 10:02:15,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 59 [2021-10-28 10:02:15,909 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-28 10:02:15,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 32 [2021-10-28 10:02:15,972 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 19 treesize of output 7 [2021-10-28 10:02:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:02:15,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904304953] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:02:15,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:02:15,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2021-10-28 10:02:15,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926862829] [2021-10-28 10:02:15,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-28 10:02:15,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:02:15,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-28 10:02:15,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1530, Unknown=2, NotChecked=0, Total=1640 [2021-10-28 10:02:15,985 INFO L87 Difference]: Start difference. First operand 284 states and 332 transitions. Second operand has 41 states, 41 states have (on average 2.292682926829268) internal successors, (94), 35 states have internal predecessors, (94), 4 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 10:02:42,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:02:42,231 INFO L93 Difference]: Finished difference Result 338 states and 380 transitions. [2021-10-28 10:02:42,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 10:02:42,232 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.292682926829268) internal successors, (94), 35 states have internal predecessors, (94), 4 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 56 [2021-10-28 10:02:42,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:02:42,235 INFO L225 Difference]: With dead ends: 338 [2021-10-28 10:02:42,235 INFO L226 Difference]: Without dead ends: 338 [2021-10-28 10:02:42,237 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=412, Invalid=4001, Unknown=9, NotChecked=0, Total=4422 [2021-10-28 10:02:42,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-10-28 10:02:42,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 284. [2021-10-28 10:02:42,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 222 states have (on average 1.40990990990991) internal successors, (313), 269 states have internal predecessors, (313), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 10:02:42,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 330 transitions. [2021-10-28 10:02:42,250 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 330 transitions. Word has length 56 [2021-10-28 10:02:42,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:02:42,250 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 330 transitions. [2021-10-28 10:02:42,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.292682926829268) internal successors, (94), 35 states have internal predecessors, (94), 4 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 10:02:42,251 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 330 transitions. [2021-10-28 10:02:42,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-28 10:02:42,252 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:02:42,252 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:02:42,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 10:02:42,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 10:02:42,466 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-28 10:02:42,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:02:42,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1789567773, now seen corresponding path program 1 times [2021-10-28 10:02:42,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:02:42,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867300619] [2021-10-28 10:02:42,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:02:42,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:02:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 10:02:42,497 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 10:02:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 10:02:42,567 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 10:02:42,568 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 10:02:42,569 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location failErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 10:02:42,572 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 10:02:42,573 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr0REQUIRES_VIOLATION [2021-10-28 10:02:42,573 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr1REQUIRES_VIOLATION [2021-10-28 10:02:42,573 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr2REQUIRES_VIOLATION [2021-10-28 10:02:42,573 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr3REQUIRES_VIOLATION [2021-10-28 10:02:42,574 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr4REQUIRES_VIOLATION [2021-10-28 10:02:42,574 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr5REQUIRES_VIOLATION [2021-10-28 10:02:42,574 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr6REQUIRES_VIOLATION [2021-10-28 10:02:42,574 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr7REQUIRES_VIOLATION [2021-10-28 10:02:42,575 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr8REQUIRES_VIOLATION [2021-10-28 10:02:42,575 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr9REQUIRES_VIOLATION [2021-10-28 10:02:42,576 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr10REQUIRES_VIOLATION [2021-10-28 10:02:42,576 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr11REQUIRES_VIOLATION [2021-10-28 10:02:42,576 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr12REQUIRES_VIOLATION [2021-10-28 10:02:42,576 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr13REQUIRES_VIOLATION [2021-10-28 10:02:42,577 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr14REQUIRES_VIOLATION [2021-10-28 10:02:42,577 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr15REQUIRES_VIOLATION [2021-10-28 10:02:42,577 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr16REQUIRES_VIOLATION [2021-10-28 10:02:42,577 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr17REQUIRES_VIOLATION [2021-10-28 10:02:42,577 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr18REQUIRES_VIOLATION [2021-10-28 10:02:42,578 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr19REQUIRES_VIOLATION [2021-10-28 10:02:42,578 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr20REQUIRES_VIOLATION [2021-10-28 10:02:42,578 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr21REQUIRES_VIOLATION [2021-10-28 10:02:42,578 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr22REQUIRES_VIOLATION [2021-10-28 10:02:42,579 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr23REQUIRES_VIOLATION [2021-10-28 10:02:42,579 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr24REQUIRES_VIOLATION [2021-10-28 10:02:42,579 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr25REQUIRES_VIOLATION [2021-10-28 10:02:42,579 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr26REQUIRES_VIOLATION [2021-10-28 10:02:42,579 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr27REQUIRES_VIOLATION [2021-10-28 10:02:42,580 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr28REQUIRES_VIOLATION [2021-10-28 10:02:42,580 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr29REQUIRES_VIOLATION [2021-10-28 10:02:42,580 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr0REQUIRES_VIOLATION [2021-10-28 10:02:42,580 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr1REQUIRES_VIOLATION [2021-10-28 10:02:42,580 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr2REQUIRES_VIOLATION [2021-10-28 10:02:42,581 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr3REQUIRES_VIOLATION [2021-10-28 10:02:42,581 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr4REQUIRES_VIOLATION [2021-10-28 10:02:42,581 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr5REQUIRES_VIOLATION [2021-10-28 10:02:42,581 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr6REQUIRES_VIOLATION [2021-10-28 10:02:42,582 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr7REQUIRES_VIOLATION [2021-10-28 10:02:42,582 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr8REQUIRES_VIOLATION [2021-10-28 10:02:42,582 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr9REQUIRES_VIOLATION [2021-10-28 10:02:42,582 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr0REQUIRES_VIOLATION [2021-10-28 10:02:42,583 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr1REQUIRES_VIOLATION [2021-10-28 10:02:42,583 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr2REQUIRES_VIOLATION [2021-10-28 10:02:42,583 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr3REQUIRES_VIOLATION [2021-10-28 10:02:42,583 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr4REQUIRES_VIOLATION [2021-10-28 10:02:42,583 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr5REQUIRES_VIOLATION [2021-10-28 10:02:42,584 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr6REQUIRES_VIOLATION [2021-10-28 10:02:42,584 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr7REQUIRES_VIOLATION [2021-10-28 10:02:42,584 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 10:02:42,584 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 10:02:42,585 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 10:02:42,585 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr11REQUIRES_VIOLATION [2021-10-28 10:02:42,585 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr12REQUIRES_VIOLATION [2021-10-28 10:02:42,585 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr13REQUIRES_VIOLATION [2021-10-28 10:02:42,585 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr14REQUIRES_VIOLATION [2021-10-28 10:02:42,586 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr15ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 10:02:42,586 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr16ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 10:02:42,586 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr17ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 10:02:42,586 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr18REQUIRES_VIOLATION [2021-10-28 10:02:42,587 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr19REQUIRES_VIOLATION [2021-10-28 10:02:42,587 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr20ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 10:02:42,587 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr21ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 10:02:42,587 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr22ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 10:02:42,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-28 10:02:42,596 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 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 10:02:42,601 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 10:02:42,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 10:02:42 BoogieIcfgContainer [2021-10-28 10:02:42,684 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 10:02:42,685 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 10:02:42,686 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 10:02:42,686 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 10:02:42,687 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:59:32" (3/4) ... [2021-10-28 10:02:42,689 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 10:02:42,772 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 10:02:42,773 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 10:02:42,774 INFO L168 Benchmark]: Toolchain (without parser) took 192295.55 ms. Allocated memory was 123.7 MB in the beginning and 174.1 MB in the end (delta: 50.3 MB). Free memory was 85.0 MB in the beginning and 42.6 MB in the end (delta: 42.4 MB). Peak memory consumption was 91.0 MB. Max. memory is 16.1 GB. [2021-10-28 10:02:42,775 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 123.7 MB. Free memory is still 102.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 10:02:42,776 INFO L168 Benchmark]: CACSL2BoogieTranslator took 670.12 ms. Allocated memory is still 123.7 MB. Free memory was 84.8 MB in the beginning and 91.9 MB in the end (delta: -7.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 10:02:42,776 INFO L168 Benchmark]: Boogie Preprocessor took 158.15 ms. Allocated memory is still 123.7 MB. Free memory was 91.9 MB in the beginning and 88.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 10:02:42,777 INFO L168 Benchmark]: RCFGBuilder took 925.19 ms. Allocated memory is still 123.7 MB. Free memory was 88.9 MB in the beginning and 60.0 MB in the end (delta: 28.8 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2021-10-28 10:02:42,778 INFO L168 Benchmark]: TraceAbstraction took 190447.61 ms. Allocated memory was 123.7 MB in the beginning and 174.1 MB in the end (delta: 50.3 MB). Free memory was 59.5 MB in the beginning and 46.8 MB in the end (delta: 12.7 MB). Peak memory consumption was 64.0 MB. Max. memory is 16.1 GB. [2021-10-28 10:02:42,778 INFO L168 Benchmark]: Witness Printer took 87.76 ms. Allocated memory is still 174.1 MB. Free memory was 46.8 MB in the beginning and 42.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 10:02:42,782 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 123.7 MB. Free memory is still 102.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 670.12 ms. Allocated memory is still 123.7 MB. Free memory was 84.8 MB in the beginning and 91.9 MB in the end (delta: -7.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 158.15 ms. Allocated memory is still 123.7 MB. Free memory was 91.9 MB in the beginning and 88.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 925.19 ms. Allocated memory is still 123.7 MB. Free memory was 88.9 MB in the beginning and 60.0 MB in the end (delta: 28.8 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 190447.61 ms. Allocated memory was 123.7 MB in the beginning and 174.1 MB in the end (delta: 50.3 MB). Free memory was 59.5 MB in the beginning and 46.8 MB in the end (delta: 12.7 MB). Peak memory consumption was 64.0 MB. Max. memory is 16.1 GB. * Witness Printer took 87.76 ms. Allocated memory is still 174.1 MB. Free memory was 46.8 MB in the beginning and 42.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s 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: 565]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L632] CALL, EXPR create_tree() [L585] struct node *nodelast = ((void *)0); [L586] struct node *node = ((void *)0); VAL [node={0:0}, nodelast={0:0}] [L587] COND TRUE __VERIFIER_nondet_int() [L588] node = malloc(sizeof *node) [L589] COND FALSE !(!node) VAL [node={-1:0}, nodelast={0:0}] [L591] node->left = ((void *)0) VAL [node={-1:0}, nodelast={0:0}] [L592] node->right = nodelast VAL [node={-1:0}, nodelast={0:0}] [L593] COND FALSE !(\read(*nodelast)) VAL [node={-1:0}, nodelast={0:0}] [L595] int value = __VERIFIER_nondet_int(); [L596] node->value = value VAL [node={-1:0}, nodelast={0:0}, value=0] [L597] nodelast = node VAL [node={-1:0}, nodelast={-1:0}, value=0] [L587] COND FALSE !(__VERIFIER_nondet_int()) [L599] COND TRUE node != ((void *)0) VAL [node={-1:0}, nodelast={-1:0}, value=0] [L600] node->parent = ((void *)0) VAL [node={-1:0}, nodelast={-1:0}, value=0] [L601] COND TRUE node != ((void *)0) [L602] node->left = malloc(sizeof *node) VAL [malloc(sizeof *node)={-2:0}, node={-1:0}, nodelast={-1:0}, value=0] [L603] COND FALSE !(!node) VAL [node={-1:0}, nodelast={-1:0}, value=0] [L605] EXPR node->left VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L605] node->left->left = ((void *)0) VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L606] EXPR node->left VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L606] node->left->right = ((void *)0) VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L607] EXPR node->left VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L607] node->left->value = 42 VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L608] EXPR node->left VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L608] node->left->parent = node VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L609] EXPR node->right VAL [node={-1:0}, node->right={0:0}, nodelast={-1:0}, value=0] [L609] node = node->right [L601] COND FALSE !(node != ((void *)0)) VAL [node={0:0}, nodelast={-1:0}, value=0] [L611] return nodelast; VAL [\result={-1:0}, node={0:0}, nodelast={-1:0}, value=0] [L632] RET, EXPR create_tree() VAL [create_tree()={-1:0}] [L632] struct node *data = create_tree(); [L633] COND FALSE !(!data) VAL [data={-1:0}] [L635] CALL inspect(data) VAL [node={-1:0}] [L575] COND FALSE !(!(node)) VAL [node={-1:0}, node={-1:0}] [L576] COND TRUE node != ((void *)0) VAL [node={-1:0}, node={-1:0}] [L577] node->left VAL [node={-1:0}, node={-1:0}, node->left={-2:0}] [L577] COND TRUE node->left [L578] EXPR node->left VAL [node={-1:0}, node={-1:0}, node->left={-2:0}] [L578] EXPR node->left->value VAL [node={-1:0}, node={-1:0}, node->left={-2:0}, node->left->value=42] [L578] COND FALSE !(!(node->left->value == 42)) [L579] EXPR node->value VAL [node={-1:0}, node={-1:0}, node->value=0] [L579] COND TRUE !(node->value) [L579] CALL fail() [L565] reach_error() - UnprovableResult [Line: 630]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 591]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 591]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 592]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 592]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 594]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 594]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 600]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 600]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 607]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 607]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 607]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 607]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 608]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 608]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 608]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 608]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 577]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 577]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 578]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 578]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 578]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 578]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 616]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 616]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 618]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 618]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 621]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 621]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 624]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 624]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 624]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 624]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 624]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 626]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 626]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 628]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 628]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 628]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 173 locations, 65 error locations. Started 1 CEGAR loops. OverallTime: 190.2s, OverallIterations: 29, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 124.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2484 SDtfs, 7028 SDslu, 5910 SDs, 0 SdLazy, 33249 SolverSat, 864 SolverUnsat, 12 SolverUnknown, 0 SolverNotchecked, 42.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1141 GetRequests, 500 SyntacticMatches, 3 SemanticMatches, 638 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6004 ImplicationChecksByTransitivity, 114.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=284occurred in iteration=26, InterpolantAutomatonStates: 408, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 28 MinimizatonAttempts, 1365 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 56.3s InterpolantComputationTime, 1501 NumberOfCodeBlocks, 1501 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 1403 ConstructedInterpolants, 169 QuantifiedInterpolants, 24583 SizeOfPredicates, 151 NumberOfNonLiveVariables, 2844 ConjunctsInSsa, 407 ConjunctsInUnsatCore, 39 InterpolantComputations, 17 PerfectInterpolantSequences, 81/152 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 10:02:42,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe821ad-2459-4f7d-bcb7-fe2a1f31def5/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...