./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 724878768076b8192fcddec982755d081255c76c80e1e283d808e6a7ebb222b9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:32:36,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:32:36,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:32:36,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:32:36,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:32:36,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:32:36,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:32:36,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:32:36,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:32:36,092 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:32:36,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:32:36,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:32:36,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:32:36,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:32:36,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:32:36,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:32:36,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:32:36,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:32:36,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:32:36,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:32:36,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:32:36,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:32:36,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:32:36,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:32:36,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:32:36,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:32:36,117 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:32:36,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:32:36,119 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:32:36,120 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:32:36,120 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:32:36,121 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:32:36,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:32:36,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:32:36,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:32:36,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:32:36,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:32:36,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:32:36,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:32:36,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:32:36,134 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:32:36,135 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:32:36,170 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:32:36,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:32:36,174 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:32:36,174 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:32:36,175 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:32:36,176 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:32:36,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:32:36,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:32:36,177 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:32:36,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:32:36,178 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:32:36,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:32:36,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:32:36,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:32:36,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:32:36,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:32:36,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:32:36,180 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:32:36,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:32:36,180 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:32:36,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:32:36,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:32:36,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:32:36,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:32:36,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:32:36,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:32:36,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:32:36,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:32:36,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:32:36,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:32:36,184 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:32:36,184 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:32:36,185 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:32:36,185 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:32:36,185 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 724878768076b8192fcddec982755d081255c76c80e1e283d808e6a7ebb222b9 [2021-11-20 05:32:36,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:32:36,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:32:36,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:32:36,501 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:32:36,502 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:32:36,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2021-11-20 05:32:36,561 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/data/0f5fbefd8/865fa78cdf8d4609a066c63c9c94aba6/FLAG56a8efb65 [2021-11-20 05:32:37,025 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:32:37,025 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2021-11-20 05:32:37,037 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/data/0f5fbefd8/865fa78cdf8d4609a066c63c9c94aba6/FLAG56a8efb65 [2021-11-20 05:32:37,377 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/data/0f5fbefd8/865fa78cdf8d4609a066c63c9c94aba6 [2021-11-20 05:32:37,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:32:37,385 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:32:37,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:32:37,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:32:37,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:32:37,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:32:37" (1/1) ... [2021-11-20 05:32:37,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b6cca90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:37, skipping insertion in model container [2021-11-20 05:32:37,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:32:37" (1/1) ... [2021-11-20 05:32:37,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:32:37,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:32:37,848 WARN L230 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_5878e8db-a08b-4121-9d10-b51506d67c5f/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2021-11-20 05:32:37,856 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:32:37,868 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:32:37,918 WARN L230 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_5878e8db-a08b-4121-9d10-b51506d67c5f/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2021-11-20 05:32:37,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:32:37,945 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:32:37,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:37 WrapperNode [2021-11-20 05:32:37,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:32:37,946 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:32:37,946 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:32:37,946 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:32:37,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:37" (1/1) ... [2021-11-20 05:32:37,990 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:37" (1/1) ... [2021-11-20 05:32:38,029 INFO L137 Inliner]: procedures = 129, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 137 [2021-11-20 05:32:38,032 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:32:38,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:32:38,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:32:38,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:32:38,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:37" (1/1) ... [2021-11-20 05:32:38,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:37" (1/1) ... [2021-11-20 05:32:38,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:37" (1/1) ... [2021-11-20 05:32:38,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:37" (1/1) ... [2021-11-20 05:32:38,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:37" (1/1) ... [2021-11-20 05:32:38,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:37" (1/1) ... [2021-11-20 05:32:38,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:37" (1/1) ... [2021-11-20 05:32:38,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:32:38,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:32:38,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:32:38,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:32:38,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:37" (1/1) ... [2021-11-20 05:32:38,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:32:38,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:38,137 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:32:38,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:32:38,183 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-20 05:32:38,184 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-20 05:32:38,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 05:32:38,184 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2021-11-20 05:32:38,184 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2021-11-20 05:32:38,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:32:38,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:32:38,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 05:32:38,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 05:32:38,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:32:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 05:32:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:32:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:32:38,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:32:38,283 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:32:38,284 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:32:38,324 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-20 05:32:38,561 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:32:38,567 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:32:38,571 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-20 05:32:38,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:32:38 BoogieIcfgContainer [2021-11-20 05:32:38,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:32:38,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:32:38,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:32:38,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:32:38,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:32:37" (1/3) ... [2021-11-20 05:32:38,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@426ac6b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:32:38, skipping insertion in model container [2021-11-20 05:32:38,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:37" (2/3) ... [2021-11-20 05:32:38,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@426ac6b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:32:38, skipping insertion in model container [2021-11-20 05:32:38,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:32:38" (3/3) ... [2021-11-20 05:32:38,586 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-1.i [2021-11-20 05:32:38,594 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:32:38,594 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:32:38,645 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:32:38,651 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-11-20 05:32:38,651 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:32:38,667 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 41 states have internal predecessors, (58), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:32:38,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 05:32:38,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:38,674 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:38,675 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:38,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:38,679 INFO L85 PathProgramCache]: Analyzing trace with hash 674316384, now seen corresponding path program 1 times [2021-11-20 05:32:38,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:38,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003181281] [2021-11-20 05:32:38,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:38,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:38,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:32:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:38,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:32:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:32:38,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:38,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003181281] [2021-11-20 05:32:38,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003181281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:38,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:38,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:32:38,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506206806] [2021-11-20 05:32:38,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:38,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 05:32:38,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:38,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 05:32:38,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:32:38,902 INFO L87 Difference]: Start difference. First operand has 47 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 41 states have internal predecessors, (58), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:32:38,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:38,926 INFO L93 Difference]: Finished difference Result 91 states and 131 transitions. [2021-11-20 05:32:38,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:32:38,928 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-11-20 05:32:38,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:38,935 INFO L225 Difference]: With dead ends: 91 [2021-11-20 05:32:38,935 INFO L226 Difference]: Without dead ends: 38 [2021-11-20 05:32:38,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:32:38,942 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:38,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:38,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-20 05:32:38,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-20 05:32:38,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:32:38,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-11-20 05:32:38,980 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 26 [2021-11-20 05:32:38,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:38,981 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-11-20 05:32:38,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:32:38,981 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-11-20 05:32:38,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 05:32:38,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:38,983 INFO L514 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] [2021-11-20 05:32:38,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:32:38,984 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:38,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:38,985 INFO L85 PathProgramCache]: Analyzing trace with hash -170080666, now seen corresponding path program 1 times [2021-11-20 05:32:38,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:38,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423288420] [2021-11-20 05:32:38,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:38,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:39,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:32:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:39,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 05:32:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:39,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:39,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423288420] [2021-11-20 05:32:39,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423288420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:39,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317419313] [2021-11-20 05:32:39,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:39,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:39,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:39,175 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:39,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:32:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:39,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:32:39,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:39,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:32:39,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317419313] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:39,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:32:39,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-20 05:32:39,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468996377] [2021-11-20 05:32:39,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:39,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:32:39,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:39,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:32:39,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:32:39,528 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:32:39,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:39,597 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2021-11-20 05:32:39,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:32:39,598 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-11-20 05:32:39,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:39,599 INFO L225 Difference]: With dead ends: 70 [2021-11-20 05:32:39,599 INFO L226 Difference]: Without dead ends: 40 [2021-11-20 05:32:39,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:32:39,602 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 3 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:39,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 213 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:39,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-20 05:32:39,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-20 05:32:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:32:39,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-11-20 05:32:39,610 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 33 [2021-11-20 05:32:39,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:39,611 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-11-20 05:32:39,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:32:39,612 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-11-20 05:32:39,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 05:32:39,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:39,613 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 05:32:39,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:39,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:39,838 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:39,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:39,839 INFO L85 PathProgramCache]: Analyzing trace with hash 2056450253, now seen corresponding path program 1 times [2021-11-20 05:32:39,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:39,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863586403] [2021-11-20 05:32:39,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:39,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:39,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:32:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:40,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 05:32:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:32:40,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:40,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863586403] [2021-11-20 05:32:40,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863586403] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:40,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:40,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 05:32:40,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121760837] [2021-11-20 05:32:40,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:40,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:32:40,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:40,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:32:40,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:32:40,038 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:32:40,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:40,164 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2021-11-20 05:32:40,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:32:40,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2021-11-20 05:32:40,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:40,170 INFO L225 Difference]: With dead ends: 65 [2021-11-20 05:32:40,170 INFO L226 Difference]: Without dead ends: 60 [2021-11-20 05:32:40,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:32:40,177 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 148 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:40,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 160 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:32:40,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-20 05:32:40,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2021-11-20 05:32:40,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:32:40,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2021-11-20 05:32:40,205 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 37 [2021-11-20 05:32:40,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:40,207 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2021-11-20 05:32:40,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:32:40,207 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2021-11-20 05:32:40,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 05:32:40,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:40,210 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 05:32:40,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 05:32:40,210 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:40,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:40,211 INFO L85 PathProgramCache]: Analyzing trace with hash -622897270, now seen corresponding path program 1 times [2021-11-20 05:32:40,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:40,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457330594] [2021-11-20 05:32:40,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:40,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:40,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:32:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:40,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 05:32:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:40,415 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:32:40,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:40,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457330594] [2021-11-20 05:32:40,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457330594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:40,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:40,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 05:32:40,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144034244] [2021-11-20 05:32:40,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:40,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:32:40,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:40,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:32:40,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:32:40,426 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 05:32:40,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:40,545 INFO L93 Difference]: Finished difference Result 103 states and 133 transitions. [2021-11-20 05:32:40,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:32:40,546 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2021-11-20 05:32:40,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:40,549 INFO L225 Difference]: With dead ends: 103 [2021-11-20 05:32:40,550 INFO L226 Difference]: Without dead ends: 74 [2021-11-20 05:32:40,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:32:40,558 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 24 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:40,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 201 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:32:40,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-20 05:32:40,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2021-11-20 05:32:40,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 05:32:40,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2021-11-20 05:32:40,568 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 38 [2021-11-20 05:32:40,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:40,569 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2021-11-20 05:32:40,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 05:32:40,569 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2021-11-20 05:32:40,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 05:32:40,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:40,571 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 05:32:40,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 05:32:40,571 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:40,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:40,572 INFO L85 PathProgramCache]: Analyzing trace with hash 57161100, now seen corresponding path program 1 times [2021-11-20 05:32:40,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:40,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427760114] [2021-11-20 05:32:40,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:40,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:40,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:32:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:40,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 05:32:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:32:40,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:40,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427760114] [2021-11-20 05:32:40,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427760114] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:40,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228300146] [2021-11-20 05:32:40,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:40,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:40,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:40,683 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:40,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:32:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:40,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 05:32:40,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:40,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:32:41,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228300146] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:41,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:41,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2021-11-20 05:32:41,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378011215] [2021-11-20 05:32:41,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:41,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 05:32:41,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:41,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 05:32:41,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:32:41,164 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 05:32:41,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:41,454 INFO L93 Difference]: Finished difference Result 118 states and 150 transitions. [2021-11-20 05:32:41,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 05:32:41,455 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2021-11-20 05:32:41,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:41,456 INFO L225 Difference]: With dead ends: 118 [2021-11-20 05:32:41,456 INFO L226 Difference]: Without dead ends: 72 [2021-11-20 05:32:41,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-11-20 05:32:41,458 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 25 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:41,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 411 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:32:41,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-20 05:32:41,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2021-11-20 05:32:41,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 54 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 05:32:41,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2021-11-20 05:32:41,467 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 38 [2021-11-20 05:32:41,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:41,468 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2021-11-20 05:32:41,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 05:32:41,468 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2021-11-20 05:32:41,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 05:32:41,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:41,470 INFO L514 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] [2021-11-20 05:32:41,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:41,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:41,690 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:41,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:41,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1539273605, now seen corresponding path program 2 times [2021-11-20 05:32:41,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:41,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184628954] [2021-11-20 05:32:41,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:41,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:41,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:32:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:41,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 05:32:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:32:41,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:41,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184628954] [2021-11-20 05:32:41,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184628954] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:41,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585892931] [2021-11-20 05:32:41,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:32:41,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:41,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:41,820 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:41,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:32:41,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:32:41,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:32:41,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 05:32:41,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:41,997 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 [2021-11-20 05:32:42,293 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 [2021-11-20 05:32:42,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:32:42,343 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 24 treesize of output 23 [2021-11-20 05:32:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:42,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:42,430 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 33 treesize of output 25 [2021-11-20 05:32:42,551 INFO L354 Elim1Store]: treesize reduction 11, result has 64.5 percent of original size [2021-11-20 05:32:42,552 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 133 treesize of output 132 [2021-11-20 05:32:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:32:42,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585892931] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:42,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:42,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2021-11-20 05:32:42,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443337147] [2021-11-20 05:32:42,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:42,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 05:32:42,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:42,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 05:32:42,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:32:42,641 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:32:42,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:42,823 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2021-11-20 05:32:42,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 05:32:42,824 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2021-11-20 05:32:42,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:42,825 INFO L225 Difference]: With dead ends: 88 [2021-11-20 05:32:42,825 INFO L226 Difference]: Without dead ends: 83 [2021-11-20 05:32:42,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-11-20 05:32:42,827 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 34 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:42,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 557 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 79 Unchecked, 0.1s Time] [2021-11-20 05:32:42,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-20 05:32:42,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2021-11-20 05:32:42,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 61 states have internal predecessors, (75), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 05:32:42,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2021-11-20 05:32:42,838 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 42 [2021-11-20 05:32:42,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:42,839 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2021-11-20 05:32:42,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:32:42,839 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2021-11-20 05:32:42,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 05:32:42,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:42,841 INFO L514 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] [2021-11-20 05:32:42,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:43,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:43,054 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:43,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:43,055 INFO L85 PathProgramCache]: Analyzing trace with hash 524495826, now seen corresponding path program 3 times [2021-11-20 05:32:43,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:43,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338654715] [2021-11-20 05:32:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:43,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:43,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:43,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:32:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:43,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 05:32:43,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:32:43,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:43,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338654715] [2021-11-20 05:32:43,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338654715] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:43,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088833271] [2021-11-20 05:32:43,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:32:43,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:43,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:43,370 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:43,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:32:43,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 05:32:43,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:32:43,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 05:32:43,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:32:43,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:32:44,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088833271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:44,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:44,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 34 [2021-11-20 05:32:44,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717280658] [2021-11-20 05:32:44,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:44,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 05:32:44,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:44,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 05:32:44,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 05:32:44,267 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 30 states have internal predecessors, (71), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 05:32:44,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:44,971 INFO L93 Difference]: Finished difference Result 158 states and 194 transitions. [2021-11-20 05:32:44,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 05:32:44,972 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 30 states have internal predecessors, (71), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2021-11-20 05:32:44,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:44,974 INFO L225 Difference]: With dead ends: 158 [2021-11-20 05:32:44,974 INFO L226 Difference]: Without dead ends: 153 [2021-11-20 05:32:44,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=281, Invalid=1975, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 05:32:44,976 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 104 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:44,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 771 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:32:44,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-20 05:32:45,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 97. [2021-11-20 05:32:45,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 87 states have internal predecessors, (106), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 05:32:45,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2021-11-20 05:32:45,012 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 43 [2021-11-20 05:32:45,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:45,013 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2021-11-20 05:32:45,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 30 states have internal predecessors, (71), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 05:32:45,013 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2021-11-20 05:32:45,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 05:32:45,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:45,017 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-20 05:32:45,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:45,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:45,242 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:45,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:45,242 INFO L85 PathProgramCache]: Analyzing trace with hash -868844251, now seen corresponding path program 4 times [2021-11-20 05:32:45,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:45,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274177999] [2021-11-20 05:32:45,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:45,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:45,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:32:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:45,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 05:32:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:32:45,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:45,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274177999] [2021-11-20 05:32:45,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274177999] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:45,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353319204] [2021-11-20 05:32:45,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:32:45,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:45,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:45,486 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:45,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5878e8db-a08b-4121-9d10-b51506d67c5f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:32:45,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:32:45,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:32:45,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-20 05:32:45,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:45,648 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 [2021-11-20 05:32:45,654 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 [2021-11-20 05:32:45,769 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 05:32:45,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 40 [2021-11-20 05:32:45,790 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-20 05:32:45,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-11-20 05:32:47,109 INFO L354 Elim1Store]: treesize reduction 162, result has 4.1 percent of original size [2021-11-20 05:32:47,109 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 135 treesize of output 90 [2021-11-20 05:32:47,228 INFO L354 Elim1Store]: treesize reduction 54, result has 11.5 percent of original size [2021-11-20 05:32:47,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 30 [2021-11-20 05:32:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:47,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:49,007 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.offset| Int) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (let ((.cse2 (select (select .cse3 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (.cse4 (select (select .cse5 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse6 (select (select .cse3 .cse2) .cse4)) (.cse7 (select (select .cse5 .cse2) .cse4))) (let ((.cse0 (select (select .cse3 .cse6) .cse7)) (.cse1 (select (select .cse5 .cse6) .cse7))) (or (and (= .cse0 0) (= .cse1 0)) (not (= .cse2 |c_ULTIMATE.start_sll_create_~new_head~0#1.base|)) (not (= (select (select .cse3 .cse0) .cse1) 0)) (not (= .cse4 |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|)))))))) is different from false [2021-11-20 05:34:04,836 WARN L227 SmtUtils]: Spent 41.25s on a formula simplification. DAG size of input: 2636 DAG size of output: 1176 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 05:34:04,853 INFO L354 Elim1Store]: treesize reduction 40158, result has 34.0 percent of original size [2021-11-20 05:34:04,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 40 select indices, 40 select index equivalence classes, 0 disjoint index pairs (out of 780 index pairs), introduced 59 new quantified variables, introduced 780 case distinctions, treesize of input 542105 treesize of output 442738 [2021-11-20 05:34:16,616 WARN L227 SmtUtils]: Spent 11.75s on a formula simplification. DAG size of input: 2390 DAG size of output: 2379 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 05:35:18,826 WARN L227 SmtUtils]: Spent 56.71s on a formula simplification. DAG size of input: 2487 DAG size of output: 927 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 05:35:18,828 INFO L354 Elim1Store]: treesize reduction 5714, result has 28.5 percent of original size [2021-11-20 05:35:18,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 40 select indices, 40 select index equivalence classes, 0 disjoint index pairs (out of 780 index pairs), introduced 49 new quantified variables, introduced 780 case distinctions, treesize of input 12010340 treesize of output 9468414