./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/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_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/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_9e5039c3-aeca-4c10-ab8b-db1c3781b530/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 724878768076b8192fcddec982755d081255c76c80e1e283d808e6a7ebb222b9 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 08:44:51,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:44:51,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:44:51,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:44:51,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:44:51,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:44:51,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:44:51,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:44:51,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:44:51,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:44:51,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:44:51,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:44:51,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:44:51,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:44:51,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:44:51,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:44:51,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:44:51,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:44:51,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:44:51,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:44:51,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:44:51,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:44:51,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:44:51,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:44:51,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:44:51,620 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:44:51,621 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:44:51,622 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:44:51,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:44:51,625 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:44:51,626 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:44:51,627 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:44:51,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:44:51,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:44:51,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:44:51,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:44:51,635 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:44:51,636 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:44:51,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:44:51,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:44:51,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:44:51,643 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-10-28 08:44:51,704 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:44:51,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:44:51,706 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:44:51,706 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:44:51,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:44:51,709 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:44:51,709 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:44:51,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:44:51,710 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:44:51,710 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 08:44:51,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:44:51,712 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:44:51,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:44:51,712 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 08:44:51,712 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 08:44:51,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:44:51,713 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 08:44:51,713 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:44:51,714 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:44:51,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:44:51,714 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:44:51,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:44:51,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:44:51,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:44:51,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:44:51,716 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:44:51,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:44:51,716 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:44:51,717 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_9e5039c3-aeca-4c10-ab8b-db1c3781b530/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 724878768076b8192fcddec982755d081255c76c80e1e283d808e6a7ebb222b9 [2021-10-28 08:44:52,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:44:52,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:44:52,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:44:52,098 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:44:52,099 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:44:52,100 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2021-10-28 08:44:52,181 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/data/d56fea75b/1b5572ab62974d0b93b2c7ad03be9d17/FLAGdb0f587f6 [2021-10-28 08:44:52,903 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:44:52,912 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2021-10-28 08:44:52,952 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/data/d56fea75b/1b5572ab62974d0b93b2c7ad03be9d17/FLAGdb0f587f6 [2021-10-28 08:44:53,135 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/data/d56fea75b/1b5572ab62974d0b93b2c7ad03be9d17 [2021-10-28 08:44:53,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:44:53,143 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 08:44:53,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:44:53,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:44:53,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:44:53,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:44:53" (1/1) ... [2021-10-28 08:44:53,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29c6d26d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:53, skipping insertion in model container [2021-10-28 08:44:53,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:44:53" (1/1) ... [2021-10-28 08:44:53,163 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:44:53,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:44:53,626 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_9e5039c3-aeca-4c10-ab8b-db1c3781b530/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2021-10-28 08:44:53,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:44:53,638 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:44:53,706 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_9e5039c3-aeca-4c10-ab8b-db1c3781b530/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2021-10-28 08:44:53,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:44:53,747 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:44:53,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:53 WrapperNode [2021-10-28 08:44:53,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:44:53,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:44:53,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:44:53,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:44:53,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:53" (1/1) ... [2021-10-28 08:44:53,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:53" (1/1) ... [2021-10-28 08:44:53,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:53" (1/1) ... [2021-10-28 08:44:53,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:53" (1/1) ... [2021-10-28 08:44:53,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:53" (1/1) ... [2021-10-28 08:44:53,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:53" (1/1) ... [2021-10-28 08:44:53,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:53" (1/1) ... [2021-10-28 08:44:53,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:44:53,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:44:53,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:44:53,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:44:53,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:53" (1/1) ... [2021-10-28 08:44:53,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:44:53,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:53,897 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:44:53,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:44:53,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 08:44:53,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:44:53,956 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 08:44:53,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 08:44:53,958 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 08:44:53,958 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-28 08:44:53,960 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2021-10-28 08:44:53,961 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2021-10-28 08:44:53,961 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2021-10-28 08:44:53,961 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_insert [2021-10-28 08:44:53,962 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2021-10-28 08:44:53,963 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 08:44:53,963 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 08:44:53,964 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 08:44:53,964 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 08:44:53,964 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 08:44:53,964 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 08:44:53,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:44:53,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 08:44:53,965 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 08:44:53,966 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 08:44:53,966 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 08:44:53,966 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 08:44:53,966 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 08:44:53,967 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 08:44:53,967 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 08:44:53,967 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 08:44:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 08:44:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 08:44:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 08:44:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 08:44:53,969 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 08:44:53,969 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 08:44:53,969 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 08:44:53,969 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 08:44:53,970 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 08:44:53,970 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 08:44:53,970 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 08:44:53,970 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 08:44:53,971 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 08:44:53,971 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 08:44:53,971 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 08:44:53,972 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 08:44:53,972 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 08:44:53,972 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 08:44:53,972 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 08:44:53,973 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 08:44:53,973 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 08:44:53,973 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 08:44:53,974 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 08:44:53,975 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 08:44:53,975 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 08:44:53,976 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 08:44:53,976 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 08:44:53,977 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 08:44:53,977 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 08:44:53,977 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 08:44:53,978 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 08:44:53,978 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 08:44:53,979 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 08:44:53,979 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 08:44:53,979 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 08:44:53,979 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 08:44:53,980 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 08:44:53,980 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 08:44:53,981 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 08:44:53,981 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 08:44:53,983 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 08:44:53,984 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 08:44:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 08:44:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 08:44:53,986 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 08:44:53,986 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 08:44:53,986 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 08:44:53,987 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 08:44:53,987 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-28 08:44:53,987 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 08:44:53,987 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 08:44:53,988 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 08:44:53,989 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 08:44:53,989 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 08:44:53,990 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 08:44:53,990 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 08:44:53,990 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 08:44:53,991 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 08:44:53,991 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 08:44:53,991 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 08:44:53,992 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 08:44:53,992 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 08:44:53,992 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 08:44:53,992 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 08:44:53,993 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 08:44:53,993 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 08:44:53,993 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 08:44:53,993 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 08:44:53,994 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 08:44:53,994 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 08:44:53,994 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 08:44:53,994 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 08:44:53,995 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 08:44:53,995 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 08:44:53,995 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 08:44:53,996 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 08:44:53,996 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 08:44:53,996 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 08:44:53,996 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 08:44:53,997 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 08:44:53,998 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 08:44:53,998 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 08:44:53,998 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 08:44:53,998 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 08:44:53,999 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 08:44:54,000 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 08:44:54,000 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 08:44:54,000 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 08:44:54,001 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 08:44:54,001 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 08:44:54,001 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 08:44:54,002 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 08:44:54,002 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 08:44:54,002 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 08:44:54,002 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 08:44:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 08:44:54,018 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-28 08:44:54,019 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2021-10-28 08:44:54,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 08:44:54,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 08:44:54,020 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2021-10-28 08:44:54,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 08:44:54,024 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2021-10-28 08:44:54,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 08:44:54,024 INFO L130 BoogieDeclarations]: Found specification of procedure sll_insert [2021-10-28 08:44:54,024 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2021-10-28 08:44:54,025 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 08:44:54,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-28 08:44:54,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 08:44:54,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 08:44:54,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:44:54,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 08:44:54,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 08:44:54,490 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-28 08:44:54,793 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:44:54,803 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-28 08:44:54,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:44:54 BoogieIcfgContainer [2021-10-28 08:44:54,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:44:54,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:44:54,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:44:54,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:44:54,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:44:53" (1/3) ... [2021-10-28 08:44:54,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ae2b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:44:54, skipping insertion in model container [2021-10-28 08:44:54,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:44:53" (2/3) ... [2021-10-28 08:44:54,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ae2b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:44:54, skipping insertion in model container [2021-10-28 08:44:54,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:44:54" (3/3) ... [2021-10-28 08:44:54,823 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-1.i [2021-10-28 08:44:54,837 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:44:54,837 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2021-10-28 08:44:54,886 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:44:54,893 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 08:44:54,893 INFO L340 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2021-10-28 08:44:54,915 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 88 states have internal predecessors, (105), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:44:54,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 08:44:54,926 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:54,927 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:54,927 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting sll_createErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:44:54,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:54,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1660292181, now seen corresponding path program 1 times [2021-10-28 08:44:54,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:54,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357448096] [2021-10-28 08:44:54,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:54,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:55,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:44:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:55,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:44:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:44:55,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:55,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357448096] [2021-10-28 08:44:55,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357448096] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:44:55,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:44:55,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:44:55,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777964563] [2021-10-28 08:44:55,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 08:44:55,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:55,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 08:44:55,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:44:55,240 INFO L87 Difference]: Start difference. First operand has 106 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 88 states have internal predecessors, (105), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:44:55,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:55,475 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2021-10-28 08:44:55,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:44:55,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-10-28 08:44:55,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:55,487 INFO L225 Difference]: With dead ends: 124 [2021-10-28 08:44:55,487 INFO L226 Difference]: Without dead ends: 117 [2021-10-28 08:44:55,489 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 08:44:55,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-10-28 08:44:55,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 99. [2021-10-28 08:44:55,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 59 states have (on average 1.5593220338983051) internal successors, (92), 83 states have internal predecessors, (92), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 08:44:55,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2021-10-28 08:44:55,549 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 18 [2021-10-28 08:44:55,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:55,550 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2021-10-28 08:44:55,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:44:55,551 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2021-10-28 08:44:55,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 08:44:55,554 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:55,555 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] [2021-10-28 08:44:55,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 08:44:55,556 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting sll_createErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:44:55,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:55,558 INFO L85 PathProgramCache]: Analyzing trace with hash -189324830, now seen corresponding path program 1 times [2021-10-28 08:44:55,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:55,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095304468] [2021-10-28 08:44:55,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:55,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:55,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:55,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:44:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:55,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:44:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:55,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:44:55,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:55,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095304468] [2021-10-28 08:44:55,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095304468] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:44:55,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:44:55,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:44:55,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918581365] [2021-10-28 08:44:55,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:44:55,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:55,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:44:55,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:44:55,791 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:44:56,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:56,123 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2021-10-28 08:44:56,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:44:56,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-10-28 08:44:56,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:56,131 INFO L225 Difference]: With dead ends: 116 [2021-10-28 08:44:56,132 INFO L226 Difference]: Without dead ends: 116 [2021-10-28 08:44:56,133 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:44:56,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-28 08:44:56,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 98. [2021-10-28 08:44:56,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 82 states have internal predecessors, (91), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 08:44:56,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2021-10-28 08:44:56,164 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 20 [2021-10-28 08:44:56,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:56,168 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2021-10-28 08:44:56,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:44:56,168 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2021-10-28 08:44:56,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 08:44:56,169 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:56,170 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] [2021-10-28 08:44:56,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 08:44:56,171 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting sll_createErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:44:56,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:56,173 INFO L85 PathProgramCache]: Analyzing trace with hash -189324829, now seen corresponding path program 1 times [2021-10-28 08:44:56,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:56,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108825318] [2021-10-28 08:44:56,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:56,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:56,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:44:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:56,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:44:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:44:56,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:56,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108825318] [2021-10-28 08:44:56,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108825318] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:44:56,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:44:56,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 08:44:56,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607639489] [2021-10-28 08:44:56,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:44:56,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:56,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:44:56,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:44:56,535 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:44:57,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:57,124 INFO L93 Difference]: Finished difference Result 135 states and 153 transitions. [2021-10-28 08:44:57,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:44:57,125 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-10-28 08:44:57,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:57,127 INFO L225 Difference]: With dead ends: 135 [2021-10-28 08:44:57,127 INFO L226 Difference]: Without dead ends: 135 [2021-10-28 08:44:57,128 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:44:57,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-28 08:44:57,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 107. [2021-10-28 08:44:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.5223880597014925) internal successors, (102), 90 states have internal predecessors, (102), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 08:44:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2021-10-28 08:44:57,139 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 20 [2021-10-28 08:44:57,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:57,140 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2021-10-28 08:44:57,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:44:57,140 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2021-10-28 08:44:57,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 08:44:57,141 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:57,142 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] [2021-10-28 08:44:57,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 08:44:57,142 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_createErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:44:57,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:57,143 INFO L85 PathProgramCache]: Analyzing trace with hash -447490267, now seen corresponding path program 1 times [2021-10-28 08:44:57,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:57,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334786713] [2021-10-28 08:44:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:57,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:57,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:44:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:57,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:44:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:44:57,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:57,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334786713] [2021-10-28 08:44:57,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334786713] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:44:57,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:44:57,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:44:57,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62640260] [2021-10-28 08:44:57,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:44:57,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:57,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:44:57,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:44:57,226 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:44:57,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:57,483 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2021-10-28 08:44:57,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:44:57,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-10-28 08:44:57,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:57,486 INFO L225 Difference]: With dead ends: 124 [2021-10-28 08:44:57,486 INFO L226 Difference]: Without dead ends: 124 [2021-10-28 08:44:57,487 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:44:57,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-28 08:44:57,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 106. [2021-10-28 08:44:57,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 67 states have (on average 1.507462686567164) internal successors, (101), 89 states have internal predecessors, (101), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 08:44:57,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 118 transitions. [2021-10-28 08:44:57,496 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 118 transitions. Word has length 20 [2021-10-28 08:44:57,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:57,497 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 118 transitions. [2021-10-28 08:44:57,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:44:57,497 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 118 transitions. [2021-10-28 08:44:57,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 08:44:57,499 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:57,499 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:44:57,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 08:44:57,500 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:44:57,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:57,501 INFO L85 PathProgramCache]: Analyzing trace with hash -2077322707, now seen corresponding path program 1 times [2021-10-28 08:44:57,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:57,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75577458] [2021-10-28 08:44:57,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:57,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:57,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:44:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:57,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:44:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:57,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 08:44:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:57,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-28 08:44:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:44:57,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:57,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75577458] [2021-10-28 08:44:57,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75577458] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:57,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624497550] [2021-10-28 08:44:57,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:57,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:57,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:57,724 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:57,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 08:44:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:57,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 08:44:57,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:58,000 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 08:44:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:44:58,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624497550] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:44:58,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:44:58,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 14 [2021-10-28 08:44:58,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137748755] [2021-10-28 08:44:58,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:44:58,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:58,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:44:58,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:44:58,292 INFO L87 Difference]: Start difference. First operand 106 states and 118 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 08:44:58,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:58,493 INFO L93 Difference]: Finished difference Result 135 states and 154 transitions. [2021-10-28 08:44:58,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 08:44:58,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-10-28 08:44:58,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:58,496 INFO L225 Difference]: With dead ends: 135 [2021-10-28 08:44:58,496 INFO L226 Difference]: Without dead ends: 135 [2021-10-28 08:44:58,497 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:44:58,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-28 08:44:58,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 117. [2021-10-28 08:44:58,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 77 states have (on average 1.4805194805194806) internal successors, (114), 98 states have internal predecessors, (114), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-28 08:44:58,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2021-10-28 08:44:58,506 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 35 [2021-10-28 08:44:58,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:58,506 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2021-10-28 08:44:58,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 08:44:58,507 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2021-10-28 08:44:58,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 08:44:58,508 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:58,509 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:44:58,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:58,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:58,735 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:44:58,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:58,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2077322706, now seen corresponding path program 1 times [2021-10-28 08:44:58,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:58,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875705710] [2021-10-28 08:44:58,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:58,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:58,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:44:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:58,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:44:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:58,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 08:44:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:58,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-28 08:44:58,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:58,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:44:58,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:58,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875705710] [2021-10-28 08:44:58,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875705710] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:58,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169466332] [2021-10-28 08:44:58,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:58,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:58,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:58,955 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:58,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 08:44:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:59,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 08:44:59,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:44:59,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169466332] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:44:59,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:44:59,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 17 [2021-10-28 08:44:59,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749759409] [2021-10-28 08:44:59,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:44:59,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:59,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:44:59,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-10-28 08:44:59,359 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 08:44:59,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:59,447 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2021-10-28 08:44:59,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:44:59,449 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2021-10-28 08:44:59,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:59,450 INFO L225 Difference]: With dead ends: 110 [2021-10-28 08:44:59,450 INFO L226 Difference]: Without dead ends: 107 [2021-10-28 08:44:59,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-10-28 08:44:59,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-28 08:44:59,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-10-28 08:44:59,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 69 states have (on average 1.4782608695652173) internal successors, (102), 90 states have internal predecessors, (102), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 08:44:59,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2021-10-28 08:44:59,457 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 35 [2021-10-28 08:44:59,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:59,457 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2021-10-28 08:44:59,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 08:44:59,458 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2021-10-28 08:44:59,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 08:44:59,459 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:59,459 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:44:59,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:59,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:59,683 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:44:59,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:59,684 INFO L85 PathProgramCache]: Analyzing trace with hash -646752834, now seen corresponding path program 1 times [2021-10-28 08:44:59,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:59,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461791404] [2021-10-28 08:44:59,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:59,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:59,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:44:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:59,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:44:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:59,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 08:44:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:59,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-10-28 08:44:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 08:44:59,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:59,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461791404] [2021-10-28 08:44:59,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461791404] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:44:59,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:44:59,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 08:44:59,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711772349] [2021-10-28 08:44:59,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:44:59,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:59,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:44:59,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:44:59,886 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 08:45:00,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:00,426 INFO L93 Difference]: Finished difference Result 155 states and 177 transitions. [2021-10-28 08:45:00,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:45:00,429 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-10-28 08:45:00,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:00,431 INFO L225 Difference]: With dead ends: 155 [2021-10-28 08:45:00,431 INFO L226 Difference]: Without dead ends: 149 [2021-10-28 08:45:00,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:45:00,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-28 08:45:00,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 117. [2021-10-28 08:45:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 78 states have (on average 1.435897435897436) internal successors, (112), 99 states have internal predecessors, (112), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2021-10-28 08:45:00,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2021-10-28 08:45:00,439 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 40 [2021-10-28 08:45:00,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:00,440 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2021-10-28 08:45:00,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 08:45:00,441 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2021-10-28 08:45:00,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 08:45:00,442 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:00,443 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:45:00,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 08:45:00,443 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:45:00,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:00,444 INFO L85 PathProgramCache]: Analyzing trace with hash -646750912, now seen corresponding path program 1 times [2021-10-28 08:45:00,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:00,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669876560] [2021-10-28 08:45:00,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:00,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:00,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:00,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:45:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:00,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 08:45:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:00,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-10-28 08:45:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:45:00,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:00,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669876560] [2021-10-28 08:45:00,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669876560] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:00,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887532449] [2021-10-28 08:45:00,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:00,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:00,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:45:00,679 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:45:00,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 08:45:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:00,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 08:45:00,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:45:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:45:01,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887532449] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:01,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:45:01,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2021-10-28 08:45:01,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211383992] [2021-10-28 08:45:01,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 08:45:01,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:01,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 08:45:01,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-10-28 08:45:01,103 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand has 18 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-28 08:45:02,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:02,271 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2021-10-28 08:45:02,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 08:45:02,272 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 40 [2021-10-28 08:45:02,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:02,274 INFO L225 Difference]: With dead ends: 172 [2021-10-28 08:45:02,274 INFO L226 Difference]: Without dead ends: 169 [2021-10-28 08:45:02,275 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-10-28 08:45:02,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-28 08:45:02,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 122. [2021-10-28 08:45:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 83 states have (on average 1.4096385542168675) internal successors, (117), 104 states have internal predecessors, (117), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2021-10-28 08:45:02,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 136 transitions. [2021-10-28 08:45:02,282 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 136 transitions. Word has length 40 [2021-10-28 08:45:02,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:02,282 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 136 transitions. [2021-10-28 08:45:02,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-28 08:45:02,282 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 136 transitions. [2021-10-28 08:45:02,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 08:45:02,284 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:02,284 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 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] [2021-10-28 08:45:02,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 08:45:02,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-28 08:45:02,511 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:45:02,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:02,512 INFO L85 PathProgramCache]: Analyzing trace with hash -417387441, now seen corresponding path program 2 times [2021-10-28 08:45:02,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:02,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077721231] [2021-10-28 08:45:02,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:02,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:02,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:02,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:45:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:02,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 08:45:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:02,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 08:45:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 08:45:02,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:02,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077721231] [2021-10-28 08:45:02,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077721231] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:02,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992210685] [2021-10-28 08:45:02,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:45:02,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:02,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:45:02,767 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:45:02,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 08:45:02,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:45:02,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:45:02,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 08:45:02,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:45:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 08:45:03,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992210685] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:03,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:45:03,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-10-28 08:45:03,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476005784] [2021-10-28 08:45:03,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 08:45:03,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:03,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 08:45:03,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:45:03,262 INFO L87 Difference]: Start difference. First operand 122 states and 136 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 15 states have internal predecessors, (46), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 08:45:05,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:05,105 INFO L93 Difference]: Finished difference Result 179 states and 210 transitions. [2021-10-28 08:45:05,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 08:45:05,106 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 15 states have internal predecessors, (46), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-10-28 08:45:05,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:05,108 INFO L225 Difference]: With dead ends: 179 [2021-10-28 08:45:05,109 INFO L226 Difference]: Without dead ends: 179 [2021-10-28 08:45:05,110 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=283, Invalid=1123, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 08:45:05,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-10-28 08:45:05,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 128. [2021-10-28 08:45:05,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 88 states have (on average 1.4090909090909092) internal successors, (124), 110 states have internal predecessors, (124), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2021-10-28 08:45:05,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 144 transitions. [2021-10-28 08:45:05,118 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 144 transitions. Word has length 45 [2021-10-28 08:45:05,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:05,119 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 144 transitions. [2021-10-28 08:45:05,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 15 states have internal predecessors, (46), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 08:45:05,119 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 144 transitions. [2021-10-28 08:45:05,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 08:45:05,121 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:05,121 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 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] [2021-10-28 08:45:05,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 08:45:05,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:05,335 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:45:05,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:05,335 INFO L85 PathProgramCache]: Analyzing trace with hash -24360431, now seen corresponding path program 1 times [2021-10-28 08:45:05,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:05,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658532034] [2021-10-28 08:45:05,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:05,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:05,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:05,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:05,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:45:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:05,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 08:45:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:05,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 08:45:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 08:45:05,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:05,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658532034] [2021-10-28 08:45:05,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658532034] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:05,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198321435] [2021-10-28 08:45:05,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:05,759 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:05,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:45:05,760 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:45:05,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 08:45:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:05,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 08:45:05,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:45:06,024 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 08:45:06,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 7 [2021-10-28 08:45:06,559 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-28 08:45:06,560 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 4 case distinctions, treesize of input 25 treesize of output 31 [2021-10-28 08:45:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:45:07,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198321435] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:07,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:45:07,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2021-10-28 08:45:07,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454679979] [2021-10-28 08:45:07,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 08:45:07,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:07,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 08:45:07,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:45:07,083 INFO L87 Difference]: Start difference. First operand 128 states and 144 transitions. Second operand has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 08:45:08,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:08,283 INFO L93 Difference]: Finished difference Result 242 states and 275 transitions. [2021-10-28 08:45:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 08:45:08,284 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2021-10-28 08:45:08,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:08,286 INFO L225 Difference]: With dead ends: 242 [2021-10-28 08:45:08,286 INFO L226 Difference]: Without dead ends: 242 [2021-10-28 08:45:08,287 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-10-28 08:45:08,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-28 08:45:08,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 185. [2021-10-28 08:45:08,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 137 states have (on average 1.4233576642335766) internal successors, (195), 160 states have internal predecessors, (195), 12 states have call successors, (12), 10 states have call predecessors, (12), 14 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2021-10-28 08:45:08,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 225 transitions. [2021-10-28 08:45:08,297 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 225 transitions. Word has length 45 [2021-10-28 08:45:08,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:08,298 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 225 transitions. [2021-10-28 08:45:08,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 08:45:08,299 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 225 transitions. [2021-10-28 08:45:08,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 08:45:08,300 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:08,300 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 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] [2021-10-28 08:45:08,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 08:45:08,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 08:45:08,515 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:45:08,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:08,515 INFO L85 PathProgramCache]: Analyzing trace with hash -24360430, now seen corresponding path program 1 times [2021-10-28 08:45:08,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:08,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25657774] [2021-10-28 08:45:08,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:08,516 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:08,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:08,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:45:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:08,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 08:45:08,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:08,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 08:45:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 08:45:08,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:08,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25657774] [2021-10-28 08:45:08,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25657774] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:08,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313981960] [2021-10-28 08:45:08,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:08,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:08,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:45:08,835 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:45:08,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 08:45:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:09,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 08:45:09,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:45:09,169 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 08:45:09,175 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 08:45:09,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 14 treesize of output 12 [2021-10-28 08:45:09,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 7 [2021-10-28 08:45:09,630 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-28 08:45:09,630 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 2 case distinctions, treesize of input 30 treesize of output 34 [2021-10-28 08:45:09,641 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 08:45:09,642 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 31 treesize of output 31 [2021-10-28 08:45:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:45:10,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313981960] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:10,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:45:10,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2021-10-28 08:45:10,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238262595] [2021-10-28 08:45:10,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 08:45:10,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:10,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 08:45:10,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:45:10,059 INFO L87 Difference]: Start difference. First operand 185 states and 225 transitions. Second operand has 16 states, 13 states have (on average 4.461538461538462) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-28 08:45:11,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:11,237 INFO L93 Difference]: Finished difference Result 255 states and 287 transitions. [2021-10-28 08:45:11,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 08:45:11,237 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.461538461538462) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2021-10-28 08:45:11,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:11,240 INFO L225 Difference]: With dead ends: 255 [2021-10-28 08:45:11,240 INFO L226 Difference]: Without dead ends: 255 [2021-10-28 08:45:11,240 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-10-28 08:45:11,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-10-28 08:45:11,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 196. [2021-10-28 08:45:11,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 146 states have (on average 1.417808219178082) internal successors, (207), 169 states have internal predecessors, (207), 13 states have call successors, (13), 11 states have call predecessors, (13), 15 states have return successors, (19), 15 states have call predecessors, (19), 12 states have call successors, (19) [2021-10-28 08:45:11,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 239 transitions. [2021-10-28 08:45:11,255 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 239 transitions. Word has length 45 [2021-10-28 08:45:11,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:11,257 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 239 transitions. [2021-10-28 08:45:11,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.461538461538462) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-28 08:45:11,257 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 239 transitions. [2021-10-28 08:45:11,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-28 08:45:11,261 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:11,261 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 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] [2021-10-28 08:45:11,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 08:45:11,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-28 08:45:11,475 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:45:11,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:11,475 INFO L85 PathProgramCache]: Analyzing trace with hash -325262371, now seen corresponding path program 1 times [2021-10-28 08:45:11,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:11,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328805254] [2021-10-28 08:45:11,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:11,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:11,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:11,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:45:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:11,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 08:45:11,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:11,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 08:45:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-28 08:45:11,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:11,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328805254] [2021-10-28 08:45:11,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328805254] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:45:11,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:45:11,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 08:45:11,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120403818] [2021-10-28 08:45:11,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 08:45:11,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:11,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 08:45:11,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:45:11,649 INFO L87 Difference]: Start difference. First operand 196 states and 239 transitions. Second operand has 12 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 08:45:12,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:12,374 INFO L93 Difference]: Finished difference Result 267 states and 333 transitions. [2021-10-28 08:45:12,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 08:45:12,375 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2021-10-28 08:45:12,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:12,377 INFO L225 Difference]: With dead ends: 267 [2021-10-28 08:45:12,377 INFO L226 Difference]: Without dead ends: 267 [2021-10-28 08:45:12,378 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:45:12,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-10-28 08:45:12,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 226. [2021-10-28 08:45:12,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 172 states have (on average 1.447674418604651) internal successors, (249), 197 states have internal predecessors, (249), 15 states have call successors, (15), 13 states have call predecessors, (15), 17 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2021-10-28 08:45:12,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 285 transitions. [2021-10-28 08:45:12,391 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 285 transitions. Word has length 49 [2021-10-28 08:45:12,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:12,391 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 285 transitions. [2021-10-28 08:45:12,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 08:45:12,392 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 285 transitions. [2021-10-28 08:45:12,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-28 08:45:12,393 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:12,393 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 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] [2021-10-28 08:45:12,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 08:45:12,393 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting sll_lengthErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:45:12,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:12,394 INFO L85 PathProgramCache]: Analyzing trace with hash -325262370, now seen corresponding path program 1 times [2021-10-28 08:45:12,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:12,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115353915] [2021-10-28 08:45:12,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:12,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:12,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:12,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:45:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:12,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 08:45:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:12,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 08:45:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 08:45:12,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:12,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115353915] [2021-10-28 08:45:12,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115353915] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:45:12,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:45:12,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 08:45:12,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188521334] [2021-10-28 08:45:12,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 08:45:12,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:12,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 08:45:12,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:45:12,645 INFO L87 Difference]: Start difference. First operand 226 states and 285 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 08:45:13,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:13,344 INFO L93 Difference]: Finished difference Result 268 states and 333 transitions. [2021-10-28 08:45:13,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 08:45:13,345 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2021-10-28 08:45:13,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:13,348 INFO L225 Difference]: With dead ends: 268 [2021-10-28 08:45:13,348 INFO L226 Difference]: Without dead ends: 268 [2021-10-28 08:45:13,348 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-10-28 08:45:13,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-10-28 08:45:13,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 226. [2021-10-28 08:45:13,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 172 states have (on average 1.436046511627907) internal successors, (247), 197 states have internal predecessors, (247), 15 states have call successors, (15), 13 states have call predecessors, (15), 17 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2021-10-28 08:45:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 283 transitions. [2021-10-28 08:45:13,362 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 283 transitions. Word has length 49 [2021-10-28 08:45:13,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:13,363 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 283 transitions. [2021-10-28 08:45:13,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 08:45:13,364 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 283 transitions. [2021-10-28 08:45:13,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-28 08:45:13,365 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:13,365 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2021-10-28 08:45:13,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 08:45:13,365 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:45:13,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:13,366 INFO L85 PathProgramCache]: Analyzing trace with hash 411208802, now seen corresponding path program 2 times [2021-10-28 08:45:13,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:13,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760313552] [2021-10-28 08:45:13,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:13,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:13,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:13,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:45:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:13,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 08:45:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:13,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-10-28 08:45:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:45:13,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:13,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760313552] [2021-10-28 08:45:13,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760313552] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:13,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403877259] [2021-10-28 08:45:13,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:45:13,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:13,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:45:13,579 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:45:13,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 08:45:13,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:45:13,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:45:13,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 08:45:13,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:45:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:45:14,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403877259] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:14,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:45:14,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-10-28 08:45:14,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492857940] [2021-10-28 08:45:14,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 08:45:14,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:14,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 08:45:14,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:45:14,078 INFO L87 Difference]: Start difference. First operand 226 states and 283 transitions. Second operand has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-28 08:45:14,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:14,986 INFO L93 Difference]: Finished difference Result 284 states and 360 transitions. [2021-10-28 08:45:14,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 08:45:14,986 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2021-10-28 08:45:14,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:14,989 INFO L225 Difference]: With dead ends: 284 [2021-10-28 08:45:14,990 INFO L226 Difference]: Without dead ends: 284 [2021-10-28 08:45:14,990 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-10-28 08:45:14,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-10-28 08:45:15,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 232. [2021-10-28 08:45:15,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 176 states have (on average 1.4318181818181819) internal successors, (252), 202 states have internal predecessors, (252), 16 states have call successors, (16), 13 states have call predecessors, (16), 18 states have return successors, (23), 16 states have call predecessors, (23), 15 states have call successors, (23) [2021-10-28 08:45:15,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 291 transitions. [2021-10-28 08:45:15,003 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 291 transitions. Word has length 50 [2021-10-28 08:45:15,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:15,003 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 291 transitions. [2021-10-28 08:45:15,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-28 08:45:15,004 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 291 transitions. [2021-10-28 08:45:15,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-28 08:45:15,005 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:15,005 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 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] [2021-10-28 08:45:15,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 08:45:15,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:15,231 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:45:15,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:15,231 INFO L85 PathProgramCache]: Analyzing trace with hash -445053959, now seen corresponding path program 1 times [2021-10-28 08:45:15,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:15,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087993253] [2021-10-28 08:45:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:15,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:15,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:15,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:45:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:15,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 08:45:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:15,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 08:45:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 08:45:15,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:15,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087993253] [2021-10-28 08:45:15,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087993253] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:15,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909048769] [2021-10-28 08:45:15,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:15,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:15,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:45:15,497 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:45:15,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 08:45:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:15,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 08:45:15,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:45:15,831 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 08:45:15,873 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 08:45:15,873 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 08:45:15,946 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 17 treesize of output 13 [2021-10-28 08:45:16,406 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 44 treesize of output 36 [2021-10-28 08:45:16,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 08:45:16,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 29 [2021-10-28 08:45:16,632 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:45:16,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909048769] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:16,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:45:16,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-10-28 08:45:16,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984976311] [2021-10-28 08:45:16,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 08:45:16,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:16,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 08:45:16,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2021-10-28 08:45:16,635 INFO L87 Difference]: Start difference. First operand 232 states and 291 transitions. Second operand has 27 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 08:45:18,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:18,429 INFO L93 Difference]: Finished difference Result 365 states and 449 transitions. [2021-10-28 08:45:18,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 08:45:18,429 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 52 [2021-10-28 08:45:18,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:18,432 INFO L225 Difference]: With dead ends: 365 [2021-10-28 08:45:18,432 INFO L226 Difference]: Without dead ends: 365 [2021-10-28 08:45:18,433 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=249, Invalid=1643, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 08:45:18,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-10-28 08:45:18,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 254. [2021-10-28 08:45:18,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 194 states have (on average 1.4329896907216495) internal successors, (278), 222 states have internal predecessors, (278), 18 states have call successors, (18), 15 states have call predecessors, (18), 20 states have return successors, (25), 16 states have call predecessors, (25), 17 states have call successors, (25) [2021-10-28 08:45:18,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 321 transitions. [2021-10-28 08:45:18,453 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 321 transitions. Word has length 52 [2021-10-28 08:45:18,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:18,454 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 321 transitions. [2021-10-28 08:45:18,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 08:45:18,469 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 321 transitions. [2021-10-28 08:45:18,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-28 08:45:18,471 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:18,471 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 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] [2021-10-28 08:45:18,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 08:45:18,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:18,686 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting sll_lengthErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:45:18,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:18,687 INFO L85 PathProgramCache]: Analyzing trace with hash -445053958, now seen corresponding path program 1 times [2021-10-28 08:45:18,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:18,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699712630] [2021-10-28 08:45:18,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:18,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:18,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:18,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:18,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:45:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:18,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 08:45:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:19,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 08:45:19,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:19,073 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 08:45:19,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:19,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699712630] [2021-10-28 08:45:19,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699712630] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:19,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164442784] [2021-10-28 08:45:19,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:19,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:19,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:45:19,082 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:45:19,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 08:45:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:19,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-28 08:45:19,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:45:19,506 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 08:45:19,636 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 08:45:19,636 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 14 treesize of output 20 [2021-10-28 08:45:19,658 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 08:45:19,658 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 08:45:19,728 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 08:45:19,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:45:20,824 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-10-28 08:45:20,824 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 87 treesize of output 62 [2021-10-28 08:45:20,840 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-28 08:45:20,840 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 53 treesize of output 39 [2021-10-28 08:45:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:45:20,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164442784] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:20,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:45:20,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2021-10-28 08:45:21,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742970384] [2021-10-28 08:45:21,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-28 08:45:21,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:21,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-28 08:45:21,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=862, Unknown=0, NotChecked=0, Total=930 [2021-10-28 08:45:21,002 INFO L87 Difference]: Start difference. First operand 254 states and 321 transitions. Second operand has 31 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 25 states have internal predecessors, (69), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 08:45:24,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:24,752 INFO L93 Difference]: Finished difference Result 355 states and 429 transitions. [2021-10-28 08:45:24,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 08:45:24,753 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 25 states have internal predecessors, (69), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 52 [2021-10-28 08:45:24,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:24,755 INFO L225 Difference]: With dead ends: 355 [2021-10-28 08:45:24,755 INFO L226 Difference]: Without dead ends: 355 [2021-10-28 08:45:24,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=245, Invalid=2011, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 08:45:24,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-10-28 08:45:24,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 254. [2021-10-28 08:45:24,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 194 states have (on average 1.422680412371134) internal successors, (276), 222 states have internal predecessors, (276), 18 states have call successors, (18), 15 states have call predecessors, (18), 20 states have return successors, (25), 16 states have call predecessors, (25), 17 states have call successors, (25) [2021-10-28 08:45:24,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 319 transitions. [2021-10-28 08:45:24,766 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 319 transitions. Word has length 52 [2021-10-28 08:45:24,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:24,766 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 319 transitions. [2021-10-28 08:45:24,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 25 states have internal predecessors, (69), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 08:45:24,767 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 319 transitions. [2021-10-28 08:45:24,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-28 08:45:24,768 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:24,768 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 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 08:45:24,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 08:45:24,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:24,995 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr4ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:45:24,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:24,995 INFO L85 PathProgramCache]: Analyzing trace with hash 235136172, now seen corresponding path program 1 times [2021-10-28 08:45:24,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:24,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610015934] [2021-10-28 08:45:24,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:24,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:25,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:25,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:45:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:25,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 08:45:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:25,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 08:45:25,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:25,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-28 08:45:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 08:45:25,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:25,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610015934] [2021-10-28 08:45:25,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610015934] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:45:25,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:45:25,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-28 08:45:25,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547380124] [2021-10-28 08:45:25,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 08:45:25,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:25,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 08:45:25,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:45:25,215 INFO L87 Difference]: Start difference. First operand 254 states and 319 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 08:45:25,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:25,735 INFO L93 Difference]: Finished difference Result 304 states and 375 transitions. [2021-10-28 08:45:25,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 08:45:25,736 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 54 [2021-10-28 08:45:25,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:25,738 INFO L225 Difference]: With dead ends: 304 [2021-10-28 08:45:25,738 INFO L226 Difference]: Without dead ends: 298 [2021-10-28 08:45:25,739 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-10-28 08:45:25,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-10-28 08:45:25,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 254. [2021-10-28 08:45:25,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 194 states have (on average 1.4123711340206186) internal successors, (274), 222 states have internal predecessors, (274), 18 states have call successors, (18), 15 states have call predecessors, (18), 20 states have return successors, (25), 16 states have call predecessors, (25), 17 states have call successors, (25) [2021-10-28 08:45:25,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 317 transitions. [2021-10-28 08:45:25,764 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 317 transitions. Word has length 54 [2021-10-28 08:45:25,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:25,764 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 317 transitions. [2021-10-28 08:45:25,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 08:45:25,765 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 317 transitions. [2021-10-28 08:45:25,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-28 08:45:25,766 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:25,766 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2021-10-28 08:45:25,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 08:45:25,766 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:45:25,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:25,767 INFO L85 PathProgramCache]: Analyzing trace with hash 916653259, now seen corresponding path program 1 times [2021-10-28 08:45:25,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:25,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35824616] [2021-10-28 08:45:25,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:25,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:25,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:25,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:45:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:25,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-10-28 08:45:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:25,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-28 08:45:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-28 08:45:25,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:25,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35824616] [2021-10-28 08:45:25,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35824616] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:25,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7434007] [2021-10-28 08:45:25,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:25,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:25,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:45:25,919 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:45:25,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 08:45:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:26,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 08:45:26,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:45:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-28 08:45:26,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7434007] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:26,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:45:26,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-10-28 08:45:26,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058778440] [2021-10-28 08:45:26,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 08:45:26,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:26,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 08:45:26,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:45:26,609 INFO L87 Difference]: Start difference. First operand 254 states and 317 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-28 08:45:27,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:27,669 INFO L93 Difference]: Finished difference Result 391 states and 498 transitions. [2021-10-28 08:45:27,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 08:45:27,670 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2021-10-28 08:45:27,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:27,675 INFO L225 Difference]: With dead ends: 391 [2021-10-28 08:45:27,676 INFO L226 Difference]: Without dead ends: 381 [2021-10-28 08:45:27,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2021-10-28 08:45:27,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-10-28 08:45:27,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 256. [2021-10-28 08:45:27,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 196 states have (on average 1.4081632653061225) internal successors, (276), 224 states have internal predecessors, (276), 18 states have call successors, (18), 15 states have call predecessors, (18), 20 states have return successors, (25), 16 states have call predecessors, (25), 17 states have call successors, (25) [2021-10-28 08:45:27,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 319 transitions. [2021-10-28 08:45:27,707 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 319 transitions. Word has length 53 [2021-10-28 08:45:27,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:27,707 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 319 transitions. [2021-10-28 08:45:27,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-28 08:45:27,708 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 319 transitions. [2021-10-28 08:45:27,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-28 08:45:27,716 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:27,716 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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] [2021-10-28 08:45:27,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 08:45:27,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 08:45:27,943 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:45:27,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:27,943 INFO L85 PathProgramCache]: Analyzing trace with hash 668506765, now seen corresponding path program 1 times [2021-10-28 08:45:27,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:27,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920838042] [2021-10-28 08:45:27,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:27,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:28,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:28,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:45:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:28,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-10-28 08:45:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:28,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-28 08:45:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-28 08:45:28,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:28,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920838042] [2021-10-28 08:45:28,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920838042] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:28,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138342372] [2021-10-28 08:45:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:28,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:28,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:45:28,541 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:45:28,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 08:45:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:28,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 08:45:28,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:45:28,939 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 08:45:28,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 9 [2021-10-28 08:45:29,483 INFO L354 Elim1Store]: treesize reduction 97, result has 17.1 percent of original size [2021-10-28 08:45:29,484 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 5 case distinctions, treesize of input 28 treesize of output 36 [2021-10-28 08:45:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 08:45:29,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138342372] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:29,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:45:29,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 18 [2021-10-28 08:45:29,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807548142] [2021-10-28 08:45:29,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 08:45:29,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:29,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 08:45:29,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:45:29,914 INFO L87 Difference]: Start difference. First operand 256 states and 319 transitions. Second operand has 19 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 08:45:31,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:31,899 INFO L93 Difference]: Finished difference Result 404 states and 496 transitions. [2021-10-28 08:45:31,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 08:45:31,900 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 53 [2021-10-28 08:45:31,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:31,903 INFO L225 Difference]: With dead ends: 404 [2021-10-28 08:45:31,903 INFO L226 Difference]: Without dead ends: 404 [2021-10-28 08:45:31,904 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2021-10-28 08:45:31,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-10-28 08:45:31,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 326. [2021-10-28 08:45:31,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 256 states have (on average 1.41796875) internal successors, (363), 286 states have internal predecessors, (363), 22 states have call successors, (22), 18 states have call predecessors, (22), 26 states have return successors, (33), 21 states have call predecessors, (33), 21 states have call successors, (33) [2021-10-28 08:45:31,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 418 transitions. [2021-10-28 08:45:31,925 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 418 transitions. Word has length 53 [2021-10-28 08:45:31,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:31,926 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 418 transitions. [2021-10-28 08:45:31,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 08:45:31,926 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 418 transitions. [2021-10-28 08:45:31,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-28 08:45:31,927 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:31,928 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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] [2021-10-28 08:45:31,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 08:45:32,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:32,149 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:45:32,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:32,150 INFO L85 PathProgramCache]: Analyzing trace with hash 668506766, now seen corresponding path program 1 times [2021-10-28 08:45:32,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:32,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994847941] [2021-10-28 08:45:32,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:32,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:32,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:32,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:45:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:32,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-10-28 08:45:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:32,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-28 08:45:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-28 08:45:32,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:32,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994847941] [2021-10-28 08:45:32,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994847941] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:32,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018854603] [2021-10-28 08:45:32,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:32,829 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:32,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:45:32,835 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:45:32,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 08:45:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:33,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 08:45:33,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:45:33,501 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 08:45:33,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 7 [2021-10-28 08:45:35,774 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_create_~new_head~0.base Int)) (and (< sll_create_~new_head~0.base |c_#StackHeapBarrier|) (exists ((v_sll_create_~new_head~0.base_12 Int) (v_sll_create_~new_head~0.base_13 Int)) (and (< v_sll_create_~new_head~0.base_12 |c_#StackHeapBarrier|) (= |c_#length| (store (store (store |c_old(#length)| v_sll_create_~new_head~0.base_12 4) v_sll_create_~new_head~0.base_13 4) sll_create_~new_head~0.base 4)))))) is different from true [2021-10-28 08:45:36,092 INFO L354 Elim1Store]: treesize reduction 93, result has 14.7 percent of original size [2021-10-28 08:45:36,092 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 3 case distinctions, treesize of input 28 treesize of output 34 [2021-10-28 08:45:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 12 not checked. [2021-10-28 08:45:36,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018854603] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:36,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:45:36,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-10-28 08:45:36,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714568487] [2021-10-28 08:45:36,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 08:45:36,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:36,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 08:45:36,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=243, Unknown=1, NotChecked=32, Total=342 [2021-10-28 08:45:36,486 INFO L87 Difference]: Start difference. First operand 326 states and 418 transitions. Second operand has 19 states, 16 states have (on average 4.3125) internal successors, (69), 17 states have internal predecessors, (69), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-28 08:45:37,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:37,992 INFO L93 Difference]: Finished difference Result 409 states and 496 transitions. [2021-10-28 08:45:37,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 08:45:37,993 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 4.3125) internal successors, (69), 17 states have internal predecessors, (69), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 53 [2021-10-28 08:45:37,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:37,995 INFO L225 Difference]: With dead ends: 409 [2021-10-28 08:45:37,996 INFO L226 Difference]: Without dead ends: 409 [2021-10-28 08:45:37,996 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=144, Invalid=615, Unknown=1, NotChecked=52, Total=812 [2021-10-28 08:45:37,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-10-28 08:45:38,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 264. [2021-10-28 08:45:38,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 203 states have (on average 1.3990147783251232) internal successors, (284), 232 states have internal predecessors, (284), 18 states have call successors, (18), 15 states have call predecessors, (18), 21 states have return successors, (26), 16 states have call predecessors, (26), 17 states have call successors, (26) [2021-10-28 08:45:38,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 328 transitions. [2021-10-28 08:45:38,008 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 328 transitions. Word has length 53 [2021-10-28 08:45:38,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:38,008 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 328 transitions. [2021-10-28 08:45:38,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 4.3125) internal successors, (69), 17 states have internal predecessors, (69), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-28 08:45:38,009 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 328 transitions. [2021-10-28 08:45:38,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 08:45:38,009 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:38,010 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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] [2021-10-28 08:45:38,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 08:45:38,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-10-28 08:45:38,231 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:45:38,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:38,231 INFO L85 PathProgramCache]: Analyzing trace with hash -38429091, now seen corresponding path program 2 times [2021-10-28 08:45:38,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:38,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069070057] [2021-10-28 08:45:38,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:38,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:38,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:38,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:45:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:38,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 08:45:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:38,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 08:45:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 08:45:38,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:38,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069070057] [2021-10-28 08:45:38,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069070057] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:38,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492860546] [2021-10-28 08:45:38,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:45:38,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:38,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:45:38,695 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:45:38,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 08:45:39,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:45:39,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:45:39,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 64 conjunts are in the unsatisfiable core [2021-10-28 08:45:39,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:45:39,165 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 08:45:39,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:45:39,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:45:39,345 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 08:45:39,346 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 08:45:39,432 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-28 08:45:39,432 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 41 treesize of output 40 [2021-10-28 08:45:39,442 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-28 08:45:39,442 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 42 treesize of output 41 [2021-10-28 08:45:42,641 INFO L354 Elim1Store]: treesize reduction 97, result has 24.8 percent of original size [2021-10-28 08:45:42,642 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 98 [2021-10-28 08:45:42,678 INFO L354 Elim1Store]: treesize reduction 102, result has 6.4 percent of original size [2021-10-28 08:45:42,678 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 69 treesize of output 53 [2021-10-28 08:45:42,712 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:45:42,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492860546] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:42,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:45:42,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35 [2021-10-28 08:45:42,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131992121] [2021-10-28 08:45:42,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 08:45:42,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:42,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 08:45:42,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1103, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 08:45:42,715 INFO L87 Difference]: Start difference. First operand 264 states and 328 transitions. Second operand has 35 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 29 states have internal predecessors, (72), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 08:45:51,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:51,662 INFO L93 Difference]: Finished difference Result 377 states and 456 transitions. [2021-10-28 08:45:51,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-28 08:45:51,662 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 29 states have internal predecessors, (72), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 55 [2021-10-28 08:45:51,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:51,664 INFO L225 Difference]: With dead ends: 377 [2021-10-28 08:45:51,664 INFO L226 Difference]: Without dead ends: 377 [2021-10-28 08:45:51,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=249, Invalid=2507, Unknown=0, NotChecked=0, Total=2756 [2021-10-28 08:45:51,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-10-28 08:45:51,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 307. [2021-10-28 08:45:51,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 239 states have (on average 1.3765690376569037) internal successors, (329), 270 states have internal predecessors, (329), 21 states have call successors, (21), 17 states have call predecessors, (21), 25 states have return successors, (32), 19 states have call predecessors, (32), 20 states have call successors, (32) [2021-10-28 08:45:51,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 382 transitions. [2021-10-28 08:45:51,679 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 382 transitions. Word has length 55 [2021-10-28 08:45:51,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:51,680 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 382 transitions. [2021-10-28 08:45:51,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 29 states have internal predecessors, (72), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 08:45:51,680 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 382 transitions. [2021-10-28 08:45:51,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-28 08:45:51,681 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:51,682 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 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, 1, 1, 1] [2021-10-28 08:45:51,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 08:45:51,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-28 08:45:51,903 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr4ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:45:51,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:51,903 INFO L85 PathProgramCache]: Analyzing trace with hash 159610384, now seen corresponding path program 1 times [2021-10-28 08:45:51,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:51,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114385541] [2021-10-28 08:45:51,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:51,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:51,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:51,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:45:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:51,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 08:45:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:52,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 08:45:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:52,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-28 08:45:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 08:45:52,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:52,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114385541] [2021-10-28 08:45:52,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114385541] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:52,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246517] [2021-10-28 08:45:52,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:52,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:52,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:45:52,127 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:45:52,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 08:45:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:52,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 08:45:52,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:45:52,883 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 08:45:53,207 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 34 treesize of output 26 [2021-10-28 08:45:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:45:55,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246517] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:55,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:45:55,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-10-28 08:45:55,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827782260] [2021-10-28 08:45:55,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 08:45:55,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:55,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 08:45:55,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=737, Unknown=1, NotChecked=0, Total=812 [2021-10-28 08:45:55,544 INFO L87 Difference]: Start difference. First operand 307 states and 382 transitions. Second operand has 29 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 24 states have internal predecessors, (69), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-28 08:47:36,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:36,748 INFO L93 Difference]: Finished difference Result 433 states and 522 transitions. [2021-10-28 08:47:36,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 08:47:36,749 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 24 states have internal predecessors, (69), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 57 [2021-10-28 08:47:36,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:36,752 INFO L225 Difference]: With dead ends: 433 [2021-10-28 08:47:36,752 INFO L226 Difference]: Without dead ends: 424 [2021-10-28 08:47:36,753 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=286, Invalid=2160, Unknown=4, NotChecked=0, Total=2450 [2021-10-28 08:47:36,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-10-28 08:47:36,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 307. [2021-10-28 08:47:36,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 239 states have (on average 1.3640167364016735) internal successors, (326), 270 states have internal predecessors, (326), 21 states have call successors, (21), 17 states have call predecessors, (21), 25 states have return successors, (32), 19 states have call predecessors, (32), 20 states have call successors, (32) [2021-10-28 08:47:36,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 379 transitions. [2021-10-28 08:47:36,767 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 379 transitions. Word has length 57 [2021-10-28 08:47:36,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:36,767 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 379 transitions. [2021-10-28 08:47:36,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 24 states have internal predecessors, (69), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-28 08:47:36,768 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 379 transitions. [2021-10-28 08:47:36,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 08:47:36,769 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:36,769 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 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] [2021-10-28 08:47:36,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:36,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:36,991 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:47:36,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:36,991 INFO L85 PathProgramCache]: Analyzing trace with hash 906045798, now seen corresponding path program 2 times [2021-10-28 08:47:36,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:36,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396127539] [2021-10-28 08:47:36,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:36,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:37,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:37,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:47:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:37,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-10-28 08:47:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:37,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-28 08:47:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:37,272 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:47:37,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:37,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396127539] [2021-10-28 08:47:37,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396127539] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:37,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015241125] [2021-10-28 08:47:37,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:47:37,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:37,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:37,274 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:37,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 08:47:37,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:47:37,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:47:37,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 08:47:37,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:47:38,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015241125] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:38,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:47:38,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 20 [2021-10-28 08:47:38,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067317029] [2021-10-28 08:47:38,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 08:47:38,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:38,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 08:47:38,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-10-28 08:47:38,004 INFO L87 Difference]: Start difference. First operand 307 states and 379 transitions. Second operand has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 17 states have internal predecessors, (68), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 08:47:39,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:39,041 INFO L93 Difference]: Finished difference Result 443 states and 577 transitions. [2021-10-28 08:47:39,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 08:47:39,042 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 17 states have internal predecessors, (68), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 58 [2021-10-28 08:47:39,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:39,044 INFO L225 Difference]: With dead ends: 443 [2021-10-28 08:47:39,044 INFO L226 Difference]: Without dead ends: 443 [2021-10-28 08:47:39,045 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 08:47:39,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-10-28 08:47:39,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 313. [2021-10-28 08:47:39,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 243 states have (on average 1.3621399176954732) internal successors, (331), 275 states have internal predecessors, (331), 22 states have call successors, (22), 17 states have call predecessors, (22), 26 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) [2021-10-28 08:47:39,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 388 transitions. [2021-10-28 08:47:39,060 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 388 transitions. Word has length 58 [2021-10-28 08:47:39,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:39,060 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 388 transitions. [2021-10-28 08:47:39,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 17 states have internal predecessors, (68), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 08:47:39,061 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 388 transitions. [2021-10-28 08:47:39,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-28 08:47:39,062 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:39,062 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 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 08:47:39,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:39,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:39,279 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr4ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:47:39,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:39,279 INFO L85 PathProgramCache]: Analyzing trace with hash 733723180, now seen corresponding path program 2 times [2021-10-28 08:47:39,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:39,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822579935] [2021-10-28 08:47:39,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:39,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:39,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:39,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:39,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:47:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:39,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 08:47:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:39,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 08:47:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:39,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-28 08:47:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 08:47:39,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:39,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822579935] [2021-10-28 08:47:39,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822579935] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:39,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413753149] [2021-10-28 08:47:39,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:47:39,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:39,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:39,615 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:39,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 08:47:40,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:47:40,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:47:40,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 08:47:40,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-28 08:47:40,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413753149] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:40,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:47:40,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 19 [2021-10-28 08:47:40,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742839382] [2021-10-28 08:47:40,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 08:47:40,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:40,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 08:47:40,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:47:40,457 INFO L87 Difference]: Start difference. First operand 313 states and 388 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 08:47:41,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:41,375 INFO L93 Difference]: Finished difference Result 438 states and 554 transitions. [2021-10-28 08:47:41,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 08:47:41,375 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 60 [2021-10-28 08:47:41,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:41,378 INFO L225 Difference]: With dead ends: 438 [2021-10-28 08:47:41,378 INFO L226 Difference]: Without dead ends: 438 [2021-10-28 08:47:41,378 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-10-28 08:47:41,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-10-28 08:47:41,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 323. [2021-10-28 08:47:41,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 251 states have (on average 1.350597609561753) internal successors, (339), 282 states have internal predecessors, (339), 24 states have call successors, (24), 17 states have call predecessors, (24), 26 states have return successors, (38), 23 states have call predecessors, (38), 23 states have call successors, (38) [2021-10-28 08:47:41,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 401 transitions. [2021-10-28 08:47:41,392 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 401 transitions. Word has length 60 [2021-10-28 08:47:41,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:41,393 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 401 transitions. [2021-10-28 08:47:41,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 08:47:41,393 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 401 transitions. [2021-10-28 08:47:41,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 08:47:41,394 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:41,395 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2021-10-28 08:47:41,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:41,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:41,610 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting sll_insertErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:47:41,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:41,611 INFO L85 PathProgramCache]: Analyzing trace with hash -576100065, now seen corresponding path program 1 times [2021-10-28 08:47:41,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:41,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079297649] [2021-10-28 08:47:41,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:41,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:41,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:41,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:41,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:47:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:41,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 08:47:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:41,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 08:47:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:41,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 08:47:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 08:47:41,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:41,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079297649] [2021-10-28 08:47:41,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079297649] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:41,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954754103] [2021-10-28 08:47:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:41,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:41,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:41,859 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:41,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 08:47:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:42,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 08:47:42,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 08:47:42,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954754103] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:42,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:47:42,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-10-28 08:47:42,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208749227] [2021-10-28 08:47:42,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 08:47:42,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:42,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 08:47:42,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-10-28 08:47:42,818 INFO L87 Difference]: Start difference. First operand 323 states and 401 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 17 states have internal predecessors, (62), 6 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-28 08:47:44,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:44,457 INFO L93 Difference]: Finished difference Result 419 states and 515 transitions. [2021-10-28 08:47:44,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 08:47:44,457 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 17 states have internal predecessors, (62), 6 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 61 [2021-10-28 08:47:44,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:44,460 INFO L225 Difference]: With dead ends: 419 [2021-10-28 08:47:44,460 INFO L226 Difference]: Without dead ends: 369 [2021-10-28 08:47:44,461 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=297, Invalid=1343, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 08:47:44,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-10-28 08:47:44,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 309. [2021-10-28 08:47:44,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 240 states have (on average 1.3291666666666666) internal successors, (319), 268 states have internal predecessors, (319), 24 states have call successors, (24), 17 states have call predecessors, (24), 23 states have return successors, (35), 23 states have call predecessors, (35), 23 states have call successors, (35) [2021-10-28 08:47:44,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 378 transitions. [2021-10-28 08:47:44,473 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 378 transitions. Word has length 61 [2021-10-28 08:47:44,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:44,473 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 378 transitions. [2021-10-28 08:47:44,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 17 states have internal predecessors, (62), 6 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-28 08:47:44,474 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 378 transitions. [2021-10-28 08:47:44,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 08:47:44,475 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:44,475 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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 08:47:44,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:44,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 08:47:44,691 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting sll_insertErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:47:44,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:44,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1277164643, now seen corresponding path program 2 times [2021-10-28 08:47:44,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:44,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705553762] [2021-10-28 08:47:44,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:44,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:44,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:44,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:47:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:44,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 08:47:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:45,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 08:47:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:45,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 08:47:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-28 08:47:45,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:45,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705553762] [2021-10-28 08:47:45,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705553762] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:45,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940819507] [2021-10-28 08:47:45,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:47:45,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:45,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:45,031 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:45,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 08:47:45,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:47:45,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:47:45,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 08:47:45,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:45,878 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 08:47:45,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 7 [2021-10-28 08:47:46,144 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-28 08:47:46,144 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 2 case distinctions, treesize of input 20 treesize of output 24 [2021-10-28 08:47:46,939 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-28 08:47:46,939 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 22 treesize of output 27 [2021-10-28 08:47:47,016 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-28 08:47:47,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940819507] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:47,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:47:47,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2021-10-28 08:47:47,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980096214] [2021-10-28 08:47:47,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 08:47:47,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:47,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 08:47:47,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-10-28 08:47:47,019 INFO L87 Difference]: Start difference. First operand 309 states and 378 transitions. Second operand has 22 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 17 states have internal predecessors, (70), 5 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-28 08:47:48,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:48,537 INFO L93 Difference]: Finished difference Result 394 states and 472 transitions. [2021-10-28 08:47:48,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 08:47:48,537 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 17 states have internal predecessors, (70), 5 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 61 [2021-10-28 08:47:48,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:48,540 INFO L225 Difference]: With dead ends: 394 [2021-10-28 08:47:48,540 INFO L226 Difference]: Without dead ends: 394 [2021-10-28 08:47:48,541 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-10-28 08:47:48,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-10-28 08:47:48,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 339. [2021-10-28 08:47:48,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 267 states have (on average 1.3408239700374531) internal successors, (358), 294 states have internal predecessors, (358), 26 states have call successors, (26), 19 states have call predecessors, (26), 25 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) [2021-10-28 08:47:48,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 421 transitions. [2021-10-28 08:47:48,554 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 421 transitions. Word has length 61 [2021-10-28 08:47:48,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:48,554 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 421 transitions. [2021-10-28 08:47:48,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 17 states have internal predecessors, (70), 5 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-28 08:47:48,555 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 421 transitions. [2021-10-28 08:47:48,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 08:47:48,556 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:48,556 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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 08:47:48,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:48,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 08:47:48,771 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting sll_insertErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:47:48,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:48,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1277164642, now seen corresponding path program 1 times [2021-10-28 08:47:48,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:48,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875486041] [2021-10-28 08:47:48,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:48,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:48,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:48,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:47:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:48,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 08:47:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:49,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 08:47:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:49,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 08:47:49,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-28 08:47:49,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:49,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875486041] [2021-10-28 08:47:49,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875486041] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:49,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136980403] [2021-10-28 08:47:49,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:49,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:49,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:49,126 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:49,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 08:47:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:49,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 08:47:49,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:49,945 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 08:47:50,131 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-28 08:47:50,132 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 2 case distinctions, treesize of input 15 treesize of output 19 [2021-10-28 08:47:50,341 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 08:47:50,341 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 08:47:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-28 08:47:50,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136980403] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:50,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:47:50,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2021-10-28 08:47:50,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98123729] [2021-10-28 08:47:50,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 08:47:50,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:50,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 08:47:50,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-10-28 08:47:50,371 INFO L87 Difference]: Start difference. First operand 339 states and 421 transitions. Second operand has 18 states, 16 states have (on average 3.875) internal successors, (62), 14 states have internal predecessors, (62), 3 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-28 08:47:51,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:51,432 INFO L93 Difference]: Finished difference Result 369 states and 447 transitions. [2021-10-28 08:47:51,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 08:47:51,433 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.875) internal successors, (62), 14 states have internal predecessors, (62), 3 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 61 [2021-10-28 08:47:51,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:51,435 INFO L225 Difference]: With dead ends: 369 [2021-10-28 08:47:51,435 INFO L226 Difference]: Without dead ends: 369 [2021-10-28 08:47:51,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-10-28 08:47:51,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-10-28 08:47:51,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 339. [2021-10-28 08:47:51,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 267 states have (on average 1.3333333333333333) internal successors, (356), 294 states have internal predecessors, (356), 26 states have call successors, (26), 19 states have call predecessors, (26), 25 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) [2021-10-28 08:47:51,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 419 transitions. [2021-10-28 08:47:51,448 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 419 transitions. Word has length 61 [2021-10-28 08:47:51,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:51,449 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 419 transitions. [2021-10-28 08:47:51,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.875) internal successors, (62), 14 states have internal predecessors, (62), 3 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-28 08:47:51,449 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 419 transitions. [2021-10-28 08:47:51,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 08:47:51,452 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:51,453 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 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] [2021-10-28 08:47:51,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:51,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 08:47:51,675 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:47:51,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:51,675 INFO L85 PathProgramCache]: Analyzing trace with hash 534522131, now seen corresponding path program 2 times [2021-10-28 08:47:51,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:51,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517344862] [2021-10-28 08:47:51,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:51,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:51,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:51,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:47:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:51,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:47:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:51,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-10-28 08:47:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-28 08:47:51,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:51,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517344862] [2021-10-28 08:47:51,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517344862] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:51,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975605643] [2021-10-28 08:47:51,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:47:51,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:51,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:51,901 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:51,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 08:47:52,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:47:52,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:47:52,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 08:47:52,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:52,887 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-28 08:47:52,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975605643] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:52,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:47:52,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-10-28 08:47:52,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347726070] [2021-10-28 08:47:52,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 08:47:52,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:52,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 08:47:52,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:47:52,889 INFO L87 Difference]: Start difference. First operand 339 states and 419 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 12 states have internal predecessors, (64), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-28 08:47:54,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:54,303 INFO L93 Difference]: Finished difference Result 548 states and 709 transitions. [2021-10-28 08:47:54,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 08:47:54,304 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 12 states have internal predecessors, (64), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 61 [2021-10-28 08:47:54,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:54,307 INFO L225 Difference]: With dead ends: 548 [2021-10-28 08:47:54,307 INFO L226 Difference]: Without dead ends: 538 [2021-10-28 08:47:54,308 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2021-10-28 08:47:54,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-10-28 08:47:54,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 341. [2021-10-28 08:47:54,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 269 states have (on average 1.3308550185873607) internal successors, (358), 296 states have internal predecessors, (358), 26 states have call successors, (26), 19 states have call predecessors, (26), 25 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) [2021-10-28 08:47:54,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 421 transitions. [2021-10-28 08:47:54,323 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 421 transitions. Word has length 61 [2021-10-28 08:47:54,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:54,323 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 421 transitions. [2021-10-28 08:47:54,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 12 states have internal predecessors, (64), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-28 08:47:54,324 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 421 transitions. [2021-10-28 08:47:54,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 08:47:54,325 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:54,325 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 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] [2021-10-28 08:47:54,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:54,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 08:47:54,540 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:47:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:54,540 INFO L85 PathProgramCache]: Analyzing trace with hash 887610513, now seen corresponding path program 3 times [2021-10-28 08:47:54,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:54,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256721815] [2021-10-28 08:47:54,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:54,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:54,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:54,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:47:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:54,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:47:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:55,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-10-28 08:47:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-28 08:47:55,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:55,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256721815] [2021-10-28 08:47:55,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256721815] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:55,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291079469] [2021-10-28 08:47:55,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:47:55,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:55,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:55,879 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:55,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 08:47:56,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-28 08:47:56,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:47:56,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 08:47:56,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:56,600 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 08:47:56,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 9 [2021-10-28 08:47:58,716 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_create_~new_head~0.base Int)) (and (< sll_create_~new_head~0.base |c_#StackHeapBarrier|) (exists ((v_sll_create_~new_head~0.base_16 Int)) (and (< v_sll_create_~new_head~0.base_16 |c_#StackHeapBarrier|) (= (store (store |c_old(#valid)| v_sll_create_~new_head~0.base_16 1) sll_create_~new_head~0.base 1) |c_#valid|))))) is different from true [2021-10-28 08:48:00,045 INFO L354 Elim1Store]: treesize reduction 164, result has 11.4 percent of original size [2021-10-28 08:48:00,046 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 4 case distinctions, treesize of input 31 treesize of output 39 [2021-10-28 08:48:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 17 not checked. [2021-10-28 08:48:00,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291079469] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:00,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:00,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2021-10-28 08:48:00,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260378095] [2021-10-28 08:48:00,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 08:48:00,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:00,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 08:48:00,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=361, Unknown=1, NotChecked=40, Total=506 [2021-10-28 08:48:00,446 INFO L87 Difference]: Start difference. First operand 341 states and 421 transitions. Second operand has 23 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 08:48:15,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:15,567 INFO L93 Difference]: Finished difference Result 476 states and 578 transitions. [2021-10-28 08:48:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 08:48:15,568 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 61 [2021-10-28 08:48:15,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:15,571 INFO L225 Difference]: With dead ends: 476 [2021-10-28 08:48:15,572 INFO L226 Difference]: Without dead ends: 476 [2021-10-28 08:48:15,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=198, Invalid=734, Unknown=2, NotChecked=58, Total=992 [2021-10-28 08:48:15,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-10-28 08:48:15,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 407. [2021-10-28 08:48:15,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 326 states have (on average 1.343558282208589) internal successors, (438), 354 states have internal predecessors, (438), 30 states have call successors, (30), 22 states have call predecessors, (30), 30 states have return successors, (44), 30 states have call predecessors, (44), 29 states have call successors, (44) [2021-10-28 08:48:15,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 512 transitions. [2021-10-28 08:48:15,588 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 512 transitions. Word has length 61 [2021-10-28 08:48:15,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:15,588 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 512 transitions. [2021-10-28 08:48:15,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 08:48:15,589 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 512 transitions. [2021-10-28 08:48:15,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 08:48:15,590 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:15,591 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 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] [2021-10-28 08:48:15,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:15,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 08:48:15,816 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:48:15,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:15,818 INFO L85 PathProgramCache]: Analyzing trace with hash 887610514, now seen corresponding path program 2 times [2021-10-28 08:48:15,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:15,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945150179] [2021-10-28 08:48:15,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:15,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:15,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:48:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:15,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:48:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:15,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:48:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:16,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-10-28 08:48:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-28 08:48:16,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:16,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945150179] [2021-10-28 08:48:16,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945150179] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:16,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566490144] [2021-10-28 08:48:16,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:48:16,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:48:16,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:48:16,968 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:48:16,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 08:48:17,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:48:17,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:48:17,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 08:48:17,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:17,700 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 08:48:17,704 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 08:48:17,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 14 [2021-10-28 08:48:17,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 9 [2021-10-28 08:48:19,063 INFO L354 Elim1Store]: treesize reduction 164, result has 11.4 percent of original size [2021-10-28 08:48:19,063 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 4 case distinctions, treesize of input 41 treesize of output 49 [2021-10-28 08:48:19,075 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 08:48:19,076 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 46 treesize of output 46 [2021-10-28 08:48:19,496 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 08:48:19,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566490144] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:19,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:19,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2021-10-28 08:48:19,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378882036] [2021-10-28 08:48:19,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 08:48:19,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:19,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 08:48:19,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-10-28 08:48:19,499 INFO L87 Difference]: Start difference. First operand 407 states and 512 transitions. Second operand has 22 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 08:48:25,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:25,397 INFO L93 Difference]: Finished difference Result 520 states and 629 transitions. [2021-10-28 08:48:25,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 08:48:25,398 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 61 [2021-10-28 08:48:25,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:25,400 INFO L225 Difference]: With dead ends: 520 [2021-10-28 08:48:25,401 INFO L226 Difference]: Without dead ends: 520 [2021-10-28 08:48:25,402 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=228, Invalid=1032, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 08:48:25,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-10-28 08:48:25,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 349. [2021-10-28 08:48:25,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 276 states have (on average 1.326086956521739) internal successors, (366), 304 states have internal predecessors, (366), 26 states have call successors, (26), 19 states have call predecessors, (26), 26 states have return successors, (38), 25 states have call predecessors, (38), 25 states have call successors, (38) [2021-10-28 08:48:25,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 430 transitions. [2021-10-28 08:48:25,416 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 430 transitions. Word has length 61 [2021-10-28 08:48:25,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:25,417 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 430 transitions. [2021-10-28 08:48:25,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 08:48:25,417 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 430 transitions. [2021-10-28 08:48:25,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-28 08:48:25,419 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:25,419 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2021-10-28 08:48:25,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:25,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:48:25,635 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting sll_destroyErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:48:25,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:25,635 INFO L85 PathProgramCache]: Analyzing trace with hash 423798166, now seen corresponding path program 1 times [2021-10-28 08:48:25,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:25,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727530101] [2021-10-28 08:48:25,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:25,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:25,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:48:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:25,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:48:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:25,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 08:48:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:25,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 08:48:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:25,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-28 08:48:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-28 08:48:25,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:25,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727530101] [2021-10-28 08:48:25,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727530101] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:48:25,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:48:25,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 08:48:25,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102306775] [2021-10-28 08:48:25,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 08:48:25,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:25,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 08:48:25,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:48:25,879 INFO L87 Difference]: Start difference. First operand 349 states and 430 transitions. Second operand has 12 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 08:48:26,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:26,767 INFO L93 Difference]: Finished difference Result 391 states and 477 transitions. [2021-10-28 08:48:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 08:48:26,768 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2021-10-28 08:48:26,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:26,770 INFO L225 Difference]: With dead ends: 391 [2021-10-28 08:48:26,770 INFO L226 Difference]: Without dead ends: 391 [2021-10-28 08:48:26,770 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:48:26,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-10-28 08:48:26,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 363. [2021-10-28 08:48:26,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 288 states have (on average 1.3298611111111112) internal successors, (383), 315 states have internal predecessors, (383), 27 states have call successors, (27), 20 states have call predecessors, (27), 28 states have return successors, (41), 27 states have call predecessors, (41), 26 states have call successors, (41) [2021-10-28 08:48:26,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 451 transitions. [2021-10-28 08:48:26,782 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 451 transitions. Word has length 64 [2021-10-28 08:48:26,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:26,783 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 451 transitions. [2021-10-28 08:48:26,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 08:48:26,783 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 451 transitions. [2021-10-28 08:48:26,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-28 08:48:26,785 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:26,785 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2021-10-28 08:48:26,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-28 08:48:26,786 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting sll_destroyErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:48:26,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:26,786 INFO L85 PathProgramCache]: Analyzing trace with hash 423798167, now seen corresponding path program 1 times [2021-10-28 08:48:26,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:26,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082021763] [2021-10-28 08:48:26,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:26,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:26,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:48:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:26,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 08:48:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:26,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 08:48:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:27,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 08:48:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:27,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-28 08:48:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-28 08:48:27,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:27,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082021763] [2021-10-28 08:48:27,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082021763] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:48:27,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:48:27,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 08:48:27,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420727123] [2021-10-28 08:48:27,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 08:48:27,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:27,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 08:48:27,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:48:27,069 INFO L87 Difference]: Start difference. First operand 363 states and 451 transitions. Second operand has 12 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 08:48:27,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:27,938 INFO L93 Difference]: Finished difference Result 401 states and 487 transitions. [2021-10-28 08:48:27,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 08:48:27,938 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2021-10-28 08:48:27,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:27,941 INFO L225 Difference]: With dead ends: 401 [2021-10-28 08:48:27,941 INFO L226 Difference]: Without dead ends: 401 [2021-10-28 08:48:27,942 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-10-28 08:48:27,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-10-28 08:48:27,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 368. [2021-10-28 08:48:27,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 294 states have (on average 1.3333333333333333) internal successors, (392), 320 states have internal predecessors, (392), 27 states have call successors, (27), 20 states have call predecessors, (27), 27 states have return successors, (39), 27 states have call predecessors, (39), 26 states have call successors, (39) [2021-10-28 08:48:27,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 458 transitions. [2021-10-28 08:48:27,954 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 458 transitions. Word has length 64 [2021-10-28 08:48:27,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:27,955 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 458 transitions. [2021-10-28 08:48:27,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 08:48:27,956 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 458 transitions. [2021-10-28 08:48:27,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-28 08:48:27,957 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:27,957 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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, 1, 1] [2021-10-28 08:48:27,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-10-28 08:48:27,958 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr4ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 08:48:27,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:27,958 INFO L85 PathProgramCache]: Analyzing trace with hash 808154331, now seen corresponding path program 1 times [2021-10-28 08:48:27,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:27,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797875664] [2021-10-28 08:48:27,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:27,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:48:27,980 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 08:48:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:48:28,032 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 08:48:28,033 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 08:48:28,034 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr4ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 08:48:28,036 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr0REQUIRES_VIOLATION [2021-10-28 08:48:28,036 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr1REQUIRES_VIOLATION [2021-10-28 08:48:28,037 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:48:28,037 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:48:28,037 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:48:28,037 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_lengthErr0REQUIRES_VIOLATION [2021-10-28 08:48:28,037 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_lengthErr1REQUIRES_VIOLATION [2021-10-28 08:48:28,038 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_createErr0REQUIRES_VIOLATION [2021-10-28 08:48:28,038 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_createErr1REQUIRES_VIOLATION [2021-10-28 08:48:28,038 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 08:48:28,038 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 08:48:28,039 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-28 08:48:28,039 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-28 08:48:28,039 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 08:48:28,039 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr0REQUIRES_VIOLATION [2021-10-28 08:48:28,039 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr1REQUIRES_VIOLATION [2021-10-28 08:48:28,040 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr2REQUIRES_VIOLATION [2021-10-28 08:48:28,040 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr3REQUIRES_VIOLATION [2021-10-28 08:48:28,040 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr4REQUIRES_VIOLATION [2021-10-28 08:48:28,040 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr5REQUIRES_VIOLATION [2021-10-28 08:48:28,041 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr6REQUIRES_VIOLATION [2021-10-28 08:48:28,041 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr7REQUIRES_VIOLATION [2021-10-28 08:48:28,041 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr8REQUIRES_VIOLATION [2021-10-28 08:48:28,041 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr9REQUIRES_VIOLATION [2021-10-28 08:48:28,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-10-28 08:48:28,045 INFO L731 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:28,049 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:48:28,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:48:28 BoogieIcfgContainer [2021-10-28 08:48:28,093 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:48:28,093 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:48:28,093 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:48:28,094 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:48:28,094 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:44:54" (3/4) ... [2021-10-28 08:48:28,096 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 08:48:28,150 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 08:48:28,150 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:48:28,151 INFO L168 Benchmark]: Toolchain (without parser) took 215008.44 ms. Allocated memory was 96.5 MB in the beginning and 220.2 MB in the end (delta: 123.7 MB). Free memory was 73.0 MB in the beginning and 82.2 MB in the end (delta: -9.2 MB). Peak memory consumption was 115.2 MB. Max. memory is 16.1 GB. [2021-10-28 08:48:28,152 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 96.5 MB. Free memory is still 74.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:48:28,152 INFO L168 Benchmark]: CACSL2BoogieTranslator took 602.23 ms. Allocated memory is still 96.5 MB. Free memory was 72.8 MB in the beginning and 56.1 MB in the end (delta: 16.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-28 08:48:28,153 INFO L168 Benchmark]: Boogie Preprocessor took 91.12 ms. Allocated memory is still 96.5 MB. Free memory was 55.9 MB in the beginning and 53.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 08:48:28,154 INFO L168 Benchmark]: RCFGBuilder took 967.55 ms. Allocated memory was 96.5 MB in the beginning and 125.8 MB in the end (delta: 29.4 MB). Free memory was 53.0 MB in the beginning and 85.1 MB in the end (delta: -32.2 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. [2021-10-28 08:48:28,154 INFO L168 Benchmark]: TraceAbstraction took 213281.99 ms. Allocated memory was 125.8 MB in the beginning and 220.2 MB in the end (delta: 94.4 MB). Free memory was 85.1 MB in the beginning and 86.4 MB in the end (delta: -1.3 MB). Peak memory consumption was 92.9 MB. Max. memory is 16.1 GB. [2021-10-28 08:48:28,155 INFO L168 Benchmark]: Witness Printer took 57.22 ms. Allocated memory is still 220.2 MB. Free memory was 86.4 MB in the beginning and 82.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 08:48:28,157 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 96.5 MB. Free memory is still 74.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 602.23 ms. Allocated memory is still 96.5 MB. Free memory was 72.8 MB in the beginning and 56.1 MB in the end (delta: 16.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 91.12 ms. Allocated memory is still 96.5 MB. Free memory was 55.9 MB in the beginning and 53.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 967.55 ms. Allocated memory was 96.5 MB in the beginning and 125.8 MB in the end (delta: 29.4 MB). Free memory was 53.0 MB in the beginning and 85.1 MB in the end (delta: -32.2 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 213281.99 ms. Allocated memory was 125.8 MB in the beginning and 220.2 MB in the end (delta: 94.4 MB). Free memory was 85.1 MB in the beginning and 86.4 MB in the end (delta: -1.3 MB). Peak memory consumption was 92.9 MB. Max. memory is 16.1 GB. * Witness Printer took 57.22 ms. Allocated memory is still 220.2 MB. Free memory was 86.4 MB in the beginning and 82.2 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: 641]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L627] CALL, EXPR _get_nondet_int(2, 5) VAL [\old(from)=2, \old(until)=5] [L620] int len = from; VAL [\old(from)=2, \old(until)=5, from=2, len=2, until=5] [L621] len < until && __VERIFIER_nondet_int() [L621] len < until && __VERIFIER_nondet_int() VAL [\old(from)=2, \old(until)=5, __VERIFIER_nondet_int()=0, from=2, len=2, len < until && __VERIFIER_nondet_int()=0, until=5] [L621] COND FALSE !(len < until && __VERIFIER_nondet_int()) [L624] return len; VAL [\old(from)=2, \old(until)=5, \result=2, from=2, len=2, until=5] [L627] RET, EXPR _get_nondet_int(2, 5) VAL [_get_nondet_int(2, 5)=2] [L627] const int len = _get_nondet_int(2, 5); [L628] SLL s = sll_create(len); VAL [len=2, s={3:0}] [L628] CALL, EXPR sll_create(len) VAL [\old(len)=2] [L575] SLL head = ((void *)0); VAL [\old(len)=2, head={0:0}, len=2] [L576] EXPR len-- VAL [\old(len)=2, head={0:0}, len=1, len--=2] [L576] COND TRUE len-- > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=2, head={0:0}, len=1, new_head={-1:0}] [L581] new_head->next = head VAL [\old(len)=2, head={0:0}, len=1, new_head={-1:0}] [L582] head = new_head VAL [\old(len)=2, head={-1:0}, len=1, new_head={-1:0}] [L576] EXPR len-- VAL [\old(len)=2, head={-1:0}, len=0, len--=1, new_head={-1:0}] [L576] COND TRUE len-- > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=2, head={-1:0}, len=0, new_head={-2:0}] [L581] new_head->next = head VAL [\old(len)=2, head={-1:0}, len=0, new_head={-2:0}] [L582] head = new_head VAL [\old(len)=2, head={-2:0}, len=0, new_head={-2:0}] [L576] EXPR len-- VAL [\old(len)=2, head={-2:0}, len=-1, len--=0, new_head={-2:0}] [L576] COND FALSE !(len-- > 0) [L584] return head; VAL [\old(len)=2, \result={-2:0}, head={-2:0}, len=-1, new_head={-2:0}] [L628] RET, EXPR sll_create(len) VAL [len=2, s={3:0}, sll_create(len)={-2:0}] [L628] SLL s = sll_create(len); [L629] CALL, EXPR _get_nondet_int(0, len - 1) VAL [\old(from)=0, \old(until)=1] [L620] int len = from; VAL [\old(from)=0, \old(until)=1, from=0, len=0, until=1] [L621] len < until && __VERIFIER_nondet_int() [L621] len < until && __VERIFIER_nondet_int() VAL [\old(from)=0, \old(until)=1, __VERIFIER_nondet_int()=1, from=0, len=0, len < until && __VERIFIER_nondet_int()=1, until=1] [L621] COND TRUE len < until && __VERIFIER_nondet_int() [L622] len++ VAL [\old(from)=0, \old(until)=1, from=0, len=1, until=1] [L621] len < until && __VERIFIER_nondet_int() VAL [\old(from)=0, \old(until)=1, from=0, len=1, len < until && __VERIFIER_nondet_int()=0, until=1] [L621] COND FALSE !(len < until && __VERIFIER_nondet_int()) [L624] return len; VAL [\old(from)=0, \old(until)=1, \result=1, from=0, len=1, until=1] [L629] RET, EXPR _get_nondet_int(0, len - 1) VAL [_get_nondet_int(0, len - 1)=1, len=2, s={3:0}] [L629] const int k = _get_nondet_int(0, len - 1); [L630] int i = 0; VAL [i=0, k=1, len=2, s={3:0}] [L631] i < k && __VERIFIER_nondet_int() [L631] i < k && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, i=0, i < k && __VERIFIER_nondet_int()=0, k=1, len=2, s={3:0}] [L631] COND FALSE !(i < k && __VERIFIER_nondet_int()) [L636] EXPR \read(s) VAL [\read(s)={-2:0}, i=0, k=1, len=2, s={3:0}] [L636] CALL, EXPR sll_length(s) VAL [head={-2:0}] [L587] int len = 0; VAL [head={-2:0}, head={-2:0}, len=0] [L588] COND TRUE \read(head) [L589] len++ VAL [head={-2:0}, head={-2:0}, len=1] [L590] EXPR head->next VAL [head={-2:0}, head={-2:0}, head->next={-1:0}, len=1] [L590] head = head->next [L588] COND TRUE \read(head) [L589] len++ VAL [head={-1:0}, head={-2:0}, len=2] [L590] EXPR head->next VAL [head={-2:0}, head={-1:0}, head->next={0:0}, len=2] [L590] head = head->next [L588] COND FALSE !(\read(head)) VAL [head={-2:0}, head={0:0}, len=2] [L592] return len; VAL [\result=2, head={-2:0}, head={0:0}, len=2] [L636] RET, EXPR sll_length(s) VAL [\read(s)={-2:0}, i=0, k=1, len=2, s={3:0}, sll_length(s)=2] [L636] COND TRUE k + len != sll_length(s) [L641] reach_error() VAL [i=0, k=1, len=2, s={3:0}] - 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: 597]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 597]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 597]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 636]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 636]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 639]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 639]: 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 all allocated memory was freed Unable to prove that all allocated memory was freed 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: 610]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 610]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: 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. - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 116 locations, 25 error locations. Started 1 CEGAR loops. OverallTime: 213.1s, OverallIterations: 33, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 161.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2809 SDtfs, 8137 SDslu, 15350 SDs, 0 SdLazy, 25164 SolverSat, 2022 SolverUnsat, 98 SolverUnknown, 0 SolverNotchecked, 134.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2080 GetRequests, 1265 SyntacticMatches, 27 SemanticMatches, 788 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3943 ImplicationChecksByTransitivity, 39.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=407occurred in iteration=29, InterpolantAutomatonStates: 472, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 32 MinimizatonAttempts, 2160 StatesRemovedByMinimization, 31 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 35.2s InterpolantComputationTime, 2769 NumberOfCodeBlocks, 2769 NumberOfCodeBlocksAsserted, 68 NumberOfCheckSat, 2652 ConstructedInterpolants, 327 QuantifiedInterpolants, 41221 SizeOfPredicates, 144 NumberOfNonLiveVariables, 5550 ConjunctsInSsa, 445 ConjunctsInUnsatCore, 54 InterpolantComputations, 12 PerfectInterpolantSequences, 800/1391 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 08:48:28,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e5039c3-aeca-4c10-ab8b-db1c3781b530/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...