./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 583b66b9d59d34de12ff7e58a8eb24a95055476e3f5044dc2a7c6b2bb83f4c67 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:39:26,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:39:26,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:39:26,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:39:26,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:39:26,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:39:26,161 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:39:26,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:39:26,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:39:26,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:39:26,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:39:26,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:39:26,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:39:26,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:39:26,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:39:26,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:39:26,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:39:26,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:39:26,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:39:26,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:39:26,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:39:26,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:39:26,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:39:26,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:39:26,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:39:26,212 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:39:26,212 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:39:26,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:39:26,214 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:39:26,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:39:26,216 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:39:26,217 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:39:26,218 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:39:26,220 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:39:26,222 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:39:26,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:39:26,223 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:39:26,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:39:26,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:39:26,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:39:26,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:39:26,227 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 11:39:26,266 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:39:26,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:39:26,267 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:39:26,267 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:39:26,268 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:39:26,268 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:39:26,269 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:39:26,269 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:39:26,269 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:39:26,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:39:26,270 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:39:26,271 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:39:26,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:39:26,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:39:26,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:39:26,271 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 11:39:26,271 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 11:39:26,272 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 11:39:26,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:39:26,272 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 11:39:26,272 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:39:26,272 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:39:26,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:39:26,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:39:26,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:39:26,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:39:26,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:39:26,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:39:26,274 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:39:26,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:39:26,275 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_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 583b66b9d59d34de12ff7e58a8eb24a95055476e3f5044dc2a7c6b2bb83f4c67 [2022-11-20 11:39:26,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:39:26,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:39:26,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:39:26,650 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:39:26,650 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:39:26,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i [2022-11-20 11:39:29,693 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:39:29,943 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:39:29,944 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i [2022-11-20 11:39:29,957 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/data/3fa857aef/87780e007eb24adfbb83dffe5d2ea3c3/FLAG7d667a6ad [2022-11-20 11:39:29,987 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/data/3fa857aef/87780e007eb24adfbb83dffe5d2ea3c3 [2022-11-20 11:39:29,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:39:29,992 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:39:29,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:39:29,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:39:29,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:39:30,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:39:29" (1/1) ... [2022-11-20 11:39:30,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fe739b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:30, skipping insertion in model container [2022-11-20 11:39:30,006 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:39:29" (1/1) ... [2022-11-20 11:39:30,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:39:30,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:39:30,428 WARN L237 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_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i[24729,24742] [2022-11-20 11:39:30,433 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:39:30,445 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:39:30,499 WARN L237 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_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i[24729,24742] [2022-11-20 11:39:30,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:39:30,527 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:39:30,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:30 WrapperNode [2022-11-20 11:39:30,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:39:30,529 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:39:30,529 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:39:30,529 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:39:30,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:30" (1/1) ... [2022-11-20 11:39:30,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:30" (1/1) ... [2022-11-20 11:39:30,575 INFO L138 Inliner]: procedures = 127, calls = 49, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 149 [2022-11-20 11:39:30,575 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:39:30,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:39:30,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:39:30,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:39:30,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:30" (1/1) ... [2022-11-20 11:39:30,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:30" (1/1) ... [2022-11-20 11:39:30,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:30" (1/1) ... [2022-11-20 11:39:30,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:30" (1/1) ... [2022-11-20 11:39:30,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:30" (1/1) ... [2022-11-20 11:39:30,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:30" (1/1) ... [2022-11-20 11:39:30,639 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:30" (1/1) ... [2022-11-20 11:39:30,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:30" (1/1) ... [2022-11-20 11:39:30,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:39:30,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:39:30,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:39:30,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:39:30,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:30" (1/1) ... [2022-11-20 11:39:30,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:39:30,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:30,702 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:39:30,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:39:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:39:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:39:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-11-20 11:39:30,751 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-11-20 11:39:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:39:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:39:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:39:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 11:39:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 11:39:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:39:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 11:39:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:39:30,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:39:30,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:39:30,877 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:39:30,880 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:39:31,554 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:39:31,561 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:39:31,566 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 11:39:31,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:39:31 BoogieIcfgContainer [2022-11-20 11:39:31,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:39:31,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:39:31,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:39:31,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:39:31,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:39:29" (1/3) ... [2022-11-20 11:39:31,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@856667a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:39:31, skipping insertion in model container [2022-11-20 11:39:31,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:30" (2/3) ... [2022-11-20 11:39:31,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@856667a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:39:31, skipping insertion in model container [2022-11-20 11:39:31,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:39:31" (3/3) ... [2022-11-20 11:39:31,590 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_unequal.i [2022-11-20 11:39:31,610 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:39:31,610 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2022-11-20 11:39:31,663 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:39:31,671 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@13df6c89, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:39:31,671 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2022-11-20 11:39:31,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 133 states have internal predecessors, (146), 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) [2022-11-20 11:39:31,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:39:31,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:31,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 11:39:31,683 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:39:31,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:31,689 INFO L85 PathProgramCache]: Analyzing trace with hash 895672562, now seen corresponding path program 1 times [2022-11-20 11:39:31,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:31,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787029312] [2022-11-20 11:39:31,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:31,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:32,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:32,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:32,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787029312] [2022-11-20 11:39:32,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787029312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:32,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:32,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:39:32,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238236367] [2022-11-20 11:39:32,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:32,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:39:32,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:32,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:39:32,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:32,114 INFO L87 Difference]: Start difference. First operand has 138 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 133 states have internal predecessors, (146), 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) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:32,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:32,291 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2022-11-20 11:39:32,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:39:32,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 11:39:32,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:32,308 INFO L225 Difference]: With dead ends: 135 [2022-11-20 11:39:32,309 INFO L226 Difference]: Without dead ends: 132 [2022-11-20 11:39:32,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:32,317 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 10 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:32,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 207 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:39:32,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-20 11:39:32,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-11-20 11:39:32,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 67 states have (on average 2.014925373134328) internal successors, (135), 127 states have internal predecessors, (135), 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) [2022-11-20 11:39:32,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 141 transitions. [2022-11-20 11:39:32,374 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 141 transitions. Word has length 6 [2022-11-20 11:39:32,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:32,375 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 141 transitions. [2022-11-20 11:39:32,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:32,375 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 141 transitions. [2022-11-20 11:39:32,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:39:32,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:32,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 11:39:32,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:39:32,376 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:39:32,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:32,377 INFO L85 PathProgramCache]: Analyzing trace with hash 895672563, now seen corresponding path program 1 times [2022-11-20 11:39:32,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:32,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516074906] [2022-11-20 11:39:32,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:32,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:32,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:32,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516074906] [2022-11-20 11:39:32,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516074906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:32,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:32,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:39:32,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254700834] [2022-11-20 11:39:32,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:32,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:39:32,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:32,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:39:32,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:32,558 INFO L87 Difference]: Start difference. First operand 132 states and 141 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:32,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:32,687 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2022-11-20 11:39:32,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:39:32,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 11:39:32,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:32,689 INFO L225 Difference]: With dead ends: 129 [2022-11-20 11:39:32,690 INFO L226 Difference]: Without dead ends: 129 [2022-11-20 11:39:32,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:32,692 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 5 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:32,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 209 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:39:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-20 11:39:32,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-11-20 11:39:32,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 124 states have internal predecessors, (132), 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) [2022-11-20 11:39:32,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2022-11-20 11:39:32,701 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 6 [2022-11-20 11:39:32,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:32,702 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2022-11-20 11:39:32,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:32,702 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2022-11-20 11:39:32,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:39:32,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:32,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:32,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:39:32,704 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:39:32,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:32,705 INFO L85 PathProgramCache]: Analyzing trace with hash -753542016, now seen corresponding path program 1 times [2022-11-20 11:39:32,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:32,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082377858] [2022-11-20 11:39:32,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:32,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:32,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:39:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:32,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:32,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082377858] [2022-11-20 11:39:32,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082377858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:32,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:32,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:39:32,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828314815] [2022-11-20 11:39:32,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:32,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:39:32,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:32,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:39:32,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:39:32,899 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 11:39:33,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:33,080 INFO L93 Difference]: Finished difference Result 140 states and 151 transitions. [2022-11-20 11:39:33,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:39:33,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-11-20 11:39:33,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:33,086 INFO L225 Difference]: With dead ends: 140 [2022-11-20 11:39:33,086 INFO L226 Difference]: Without dead ends: 140 [2022-11-20 11:39:33,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:39:33,096 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 10 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:33,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 313 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:39:33,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-20 11:39:33,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2022-11-20 11:39:33,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 125 states have internal predecessors, (133), 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) [2022-11-20 11:39:33,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 139 transitions. [2022-11-20 11:39:33,109 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 139 transitions. Word has length 14 [2022-11-20 11:39:33,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:33,109 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 139 transitions. [2022-11-20 11:39:33,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 11:39:33,113 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 139 transitions. [2022-11-20 11:39:33,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 11:39:33,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:33,115 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:33,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:39:33,115 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:39:33,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:33,116 INFO L85 PathProgramCache]: Analyzing trace with hash 265974304, now seen corresponding path program 1 times [2022-11-20 11:39:33,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:33,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650226396] [2022-11-20 11:39:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:33,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:33,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:39:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:33,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:39:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:39:33,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:33,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650226396] [2022-11-20 11:39:33,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650226396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:33,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:33,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:39:33,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651832104] [2022-11-20 11:39:33,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:33,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:39:33,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:33,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:39:33,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:39:33,360 INFO L87 Difference]: Start difference. First operand 130 states and 139 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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) [2022-11-20 11:39:33,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:33,747 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2022-11-20 11:39:33,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:39:33,748 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 24 [2022-11-20 11:39:33,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:33,750 INFO L225 Difference]: With dead ends: 130 [2022-11-20 11:39:33,750 INFO L226 Difference]: Without dead ends: 130 [2022-11-20 11:39:33,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:39:33,752 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 21 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:33,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 426 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:39:33,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-20 11:39:33,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-11-20 11:39:33,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 68 states have (on average 1.9411764705882353) internal successors, (132), 124 states have internal predecessors, (132), 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) [2022-11-20 11:39:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2022-11-20 11:39:33,775 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 24 [2022-11-20 11:39:33,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:33,775 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2022-11-20 11:39:33,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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) [2022-11-20 11:39:33,776 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2022-11-20 11:39:33,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 11:39:33,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:33,777 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:33,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:39:33,777 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:39:33,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:33,779 INFO L85 PathProgramCache]: Analyzing trace with hash 265974305, now seen corresponding path program 1 times [2022-11-20 11:39:33,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:33,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318991984] [2022-11-20 11:39:33,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:33,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:34,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:39:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:34,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:39:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:34,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:39:34,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:34,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318991984] [2022-11-20 11:39:34,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318991984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:34,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:34,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:39:34,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857530791] [2022-11-20 11:39:34,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:34,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:39:34,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:34,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:39:34,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:39:34,126 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-11-20 11:39:34,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:34,495 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2022-11-20 11:39:34,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:39:34,499 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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 24 [2022-11-20 11:39:34,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:34,500 INFO L225 Difference]: With dead ends: 129 [2022-11-20 11:39:34,501 INFO L226 Difference]: Without dead ends: 129 [2022-11-20 11:39:34,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:39:34,502 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 19 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:34,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 450 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:39:34,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-20 11:39:34,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-11-20 11:39:34,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 68 states have (on average 1.9264705882352942) internal successors, (131), 123 states have internal predecessors, (131), 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) [2022-11-20 11:39:34,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2022-11-20 11:39:34,511 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 24 [2022-11-20 11:39:34,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:34,511 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2022-11-20 11:39:34,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-11-20 11:39:34,512 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2022-11-20 11:39:34,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 11:39:34,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:34,513 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:34,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:39:34,513 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:39:34,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:34,514 INFO L85 PathProgramCache]: Analyzing trace with hash -2096731903, now seen corresponding path program 1 times [2022-11-20 11:39:34,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:34,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595355749] [2022-11-20 11:39:34,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:34,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:34,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:34,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:39:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:34,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:39:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:34,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:39:34,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:34,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595355749] [2022-11-20 11:39:34,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595355749] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:34,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976200321] [2022-11-20 11:39:34,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:34,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:34,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:34,870 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:34,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:39:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:35,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:39:35,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:35,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:39:35,198 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_352 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_352))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-11-20 11:39:35,339 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 11:39:35,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 11:39:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2022-11-20 11:39:35,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:35,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976200321] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:35,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:39:35,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2022-11-20 11:39:35,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984034937] [2022-11-20 11:39:35,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:35,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:39:35,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:35,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:39:35,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2022-11-20 11:39:35,480 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:39:35,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:35,990 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2022-11-20 11:39:35,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:39:35,991 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-11-20 11:39:35,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:35,992 INFO L225 Difference]: With dead ends: 135 [2022-11-20 11:39:35,992 INFO L226 Difference]: Without dead ends: 135 [2022-11-20 11:39:35,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=124, Unknown=1, NotChecked=22, Total=182 [2022-11-20 11:39:35,993 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 5 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:35,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 495 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 394 Invalid, 0 Unknown, 153 Unchecked, 0.4s Time] [2022-11-20 11:39:35,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-20 11:39:35,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2022-11-20 11:39:35,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.9027777777777777) internal successors, (137), 127 states have internal predecessors, (137), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 11:39:36,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 145 transitions. [2022-11-20 11:39:36,000 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 145 transitions. Word has length 26 [2022-11-20 11:39:36,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:36,000 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 145 transitions. [2022-11-20 11:39:36,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:39:36,001 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 145 transitions. [2022-11-20 11:39:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 11:39:36,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:36,001 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:36,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:36,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 11:39:36,202 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:39:36,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:36,203 INFO L85 PathProgramCache]: Analyzing trace with hash -2096731902, now seen corresponding path program 1 times [2022-11-20 11:39:36,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:36,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798550541] [2022-11-20 11:39:36,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:36,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:36,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:39:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:36,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:39:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:36,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:39:36,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:36,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798550541] [2022-11-20 11:39:36,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798550541] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:36,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443820057] [2022-11-20 11:39:36,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:36,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:36,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:36,729 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:36,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:39:36,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:36,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 11:39:36,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:36,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:39:37,306 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:39:37,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 11:39:37,324 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:39:37,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:39:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:37,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:43,622 WARN L233 SmtUtils]: Spent 6.08s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:39:43,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443820057] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:43,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:39:43,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2022-11-20 11:39:43,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647195226] [2022-11-20 11:39:43,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:43,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:39:43,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:43,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:39:43,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:39:43,627 INFO L87 Difference]: Start difference. First operand 133 states and 145 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 11:39:44,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:44,615 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2022-11-20 11:39:44,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:39:44,616 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2022-11-20 11:39:44,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:44,617 INFO L225 Difference]: With dead ends: 135 [2022-11-20 11:39:44,617 INFO L226 Difference]: Without dead ends: 135 [2022-11-20 11:39:44,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:39:44,618 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 5 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:44,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 853 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 713 Invalid, 0 Unknown, 161 Unchecked, 0.7s Time] [2022-11-20 11:39:44,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-20 11:39:44,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2022-11-20 11:39:44,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.8888888888888888) internal successors, (136), 127 states have internal predecessors, (136), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 11:39:44,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 144 transitions. [2022-11-20 11:39:44,634 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 144 transitions. Word has length 26 [2022-11-20 11:39:44,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:44,635 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 144 transitions. [2022-11-20 11:39:44,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 11:39:44,635 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 144 transitions. [2022-11-20 11:39:44,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 11:39:44,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:44,636 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:44,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:44,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 11:39:44,844 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:39:44,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:44,845 INFO L85 PathProgramCache]: Analyzing trace with hash -619542825, now seen corresponding path program 1 times [2022-11-20 11:39:44,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:44,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650314406] [2022-11-20 11:39:44,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:44,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:44,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:39:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:45,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:39:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:39:45,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:45,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650314406] [2022-11-20 11:39:45,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650314406] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:45,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932285293] [2022-11-20 11:39:45,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:45,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:45,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:45,081 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:45,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:39:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:45,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:39:45,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:39:45,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:39:45,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932285293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:39:45,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:39:45,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-11-20 11:39:45,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905041484] [2022-11-20 11:39:45,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:45,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:39:45,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:45,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:39:45,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:39:45,459 INFO L87 Difference]: Start difference. First operand 133 states and 144 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:39:45,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:45,730 INFO L93 Difference]: Finished difference Result 134 states and 144 transitions. [2022-11-20 11:39:45,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:39:45,731 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-20 11:39:45,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:45,732 INFO L225 Difference]: With dead ends: 134 [2022-11-20 11:39:45,732 INFO L226 Difference]: Without dead ends: 134 [2022-11-20 11:39:45,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:39:45,733 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 4 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:45,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 660 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:39:45,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-20 11:39:45,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-11-20 11:39:45,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.875) internal successors, (135), 127 states have internal predecessors, (135), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 11:39:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2022-11-20 11:39:45,740 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 28 [2022-11-20 11:39:45,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:45,741 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2022-11-20 11:39:45,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:39:45,741 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2022-11-20 11:39:45,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 11:39:45,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:45,743 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:45,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 11:39:45,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:45,950 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:39:45,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:45,950 INFO L85 PathProgramCache]: Analyzing trace with hash -2030739054, now seen corresponding path program 1 times [2022-11-20 11:39:45,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:45,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705684731] [2022-11-20 11:39:45,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:45,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:46,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:39:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:46,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:39:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:39:46,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:46,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705684731] [2022-11-20 11:39:46,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705684731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:46,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270690739] [2022-11-20 11:39:46,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:46,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:46,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:46,095 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:46,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:39:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:46,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 11:39:46,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:39:46,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:46,309 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 11:39:46,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-11-20 11:39:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:39:46,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270690739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:39:46,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:39:46,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2022-11-20 11:39:46,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563706858] [2022-11-20 11:39:46,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:46,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:39:46,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:46,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:39:46,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:39:46,344 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:39:46,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:46,639 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2022-11-20 11:39:46,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:39:46,641 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-11-20 11:39:46,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:46,642 INFO L225 Difference]: With dead ends: 138 [2022-11-20 11:39:46,642 INFO L226 Difference]: Without dead ends: 138 [2022-11-20 11:39:46,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:39:46,643 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 12 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:46,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 429 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:39:46,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-20 11:39:46,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2022-11-20 11:39:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 75 states have (on average 1.8666666666666667) internal successors, (140), 130 states have internal predecessors, (140), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 11:39:46,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 148 transitions. [2022-11-20 11:39:46,649 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 148 transitions. Word has length 29 [2022-11-20 11:39:46,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:46,649 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 148 transitions. [2022-11-20 11:39:46,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:39:46,649 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 148 transitions. [2022-11-20 11:39:46,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 11:39:46,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:46,659 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:46,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:46,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:46,860 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:39:46,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:46,860 INFO L85 PathProgramCache]: Analyzing trace with hash -2030739053, now seen corresponding path program 1 times [2022-11-20 11:39:46,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:46,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608395542] [2022-11-20 11:39:46,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:46,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:47,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:39:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:47,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:39:47,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:39:47,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:47,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608395542] [2022-11-20 11:39:47,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608395542] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:47,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862040230] [2022-11-20 11:39:47,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:47,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:47,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:47,151 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:47,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:39:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:47,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:39:47,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:39:47,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:47,518 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:39:47,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-11-20 11:39:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:39:47,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862040230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:39:47,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:39:47,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2022-11-20 11:39:47,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438785325] [2022-11-20 11:39:47,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:47,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:39:47,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:47,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:39:47,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:39:47,699 INFO L87 Difference]: Start difference. First operand 136 states and 148 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-20 11:39:48,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:48,175 INFO L93 Difference]: Finished difference Result 143 states and 156 transitions. [2022-11-20 11:39:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:39:48,176 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-11-20 11:39:48,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:48,177 INFO L225 Difference]: With dead ends: 143 [2022-11-20 11:39:48,177 INFO L226 Difference]: Without dead ends: 143 [2022-11-20 11:39:48,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:39:48,178 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 28 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:48,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1226 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:39:48,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-20 11:39:48,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2022-11-20 11:39:48,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 75 states have (on average 1.8533333333333333) internal successors, (139), 130 states have internal predecessors, (139), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 11:39:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2022-11-20 11:39:48,191 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 29 [2022-11-20 11:39:48,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:48,191 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2022-11-20 11:39:48,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-20 11:39:48,192 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2022-11-20 11:39:48,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 11:39:48,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:48,195 INFO L195 NwaCegarLoop]: 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] [2022-11-20 11:39:48,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:48,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:48,397 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:39:48,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:48,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1471598771, now seen corresponding path program 1 times [2022-11-20 11:39:48,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:48,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501887759] [2022-11-20 11:39:48,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:48,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:48,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:39:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:48,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:39:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:39:48,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:48,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501887759] [2022-11-20 11:39:48,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501887759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:48,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:48,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:39:48,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341019104] [2022-11-20 11:39:48,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:48,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:39:48,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:48,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:39:48,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:39:48,559 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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) [2022-11-20 11:39:48,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:48,996 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2022-11-20 11:39:48,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:39:48,996 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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 30 [2022-11-20 11:39:48,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:48,997 INFO L225 Difference]: With dead ends: 136 [2022-11-20 11:39:48,998 INFO L226 Difference]: Without dead ends: 136 [2022-11-20 11:39:48,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:39:48,999 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 24 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:48,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 475 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:39:49,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-20 11:39:49,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2022-11-20 11:39:49,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 75 states have (on average 1.84) internal successors, (138), 129 states have internal predecessors, (138), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 11:39:49,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 146 transitions. [2022-11-20 11:39:49,004 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 146 transitions. Word has length 30 [2022-11-20 11:39:49,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:49,005 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 146 transitions. [2022-11-20 11:39:49,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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) [2022-11-20 11:39:49,005 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 146 transitions. [2022-11-20 11:39:49,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 11:39:49,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:49,006 INFO L195 NwaCegarLoop]: 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] [2022-11-20 11:39:49,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 11:39:49,007 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:39:49,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:49,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1471598772, now seen corresponding path program 1 times [2022-11-20 11:39:49,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:49,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940580787] [2022-11-20 11:39:49,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:49,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:49,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:39:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:49,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:39:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:39:49,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:49,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940580787] [2022-11-20 11:39:49,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940580787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:49,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:49,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:39:49,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12977381] [2022-11-20 11:39:49,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:49,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:39:49,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:49,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:39:49,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:39:49,346 INFO L87 Difference]: Start difference. First operand 135 states and 146 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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) [2022-11-20 11:39:49,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:49,709 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2022-11-20 11:39:49,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:39:49,709 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 30 [2022-11-20 11:39:49,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:49,710 INFO L225 Difference]: With dead ends: 134 [2022-11-20 11:39:49,710 INFO L226 Difference]: Without dead ends: 134 [2022-11-20 11:39:49,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:39:49,711 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 20 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:49,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 505 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:39:49,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-20 11:39:49,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-11-20 11:39:49,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 75 states have (on average 1.8266666666666667) internal successors, (137), 128 states have internal predecessors, (137), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 11:39:49,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 145 transitions. [2022-11-20 11:39:49,715 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 145 transitions. Word has length 30 [2022-11-20 11:39:49,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:49,715 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 145 transitions. [2022-11-20 11:39:49,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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) [2022-11-20 11:39:49,716 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 145 transitions. [2022-11-20 11:39:49,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 11:39:49,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:49,717 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:49,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:39:49,717 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:39:49,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:49,717 INFO L85 PathProgramCache]: Analyzing trace with hash 939320083, now seen corresponding path program 1 times [2022-11-20 11:39:49,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:49,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597417558] [2022-11-20 11:39:49,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:49,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:49,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:39:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:49,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:39:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:49,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-20 11:39:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 11:39:49,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:49,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597417558] [2022-11-20 11:39:49,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597417558] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:49,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395357184] [2022-11-20 11:39:49,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:49,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:49,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:49,866 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:49,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:39:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:50,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:39:50,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:39:50,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:39:50,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395357184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:50,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:39:50,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-11-20 11:39:50,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510560939] [2022-11-20 11:39:50,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:50,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:39:50,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:50,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:39:50,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:39:50,147 INFO L87 Difference]: Start difference. First operand 134 states and 145 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:39:50,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:50,162 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2022-11-20 11:39:50,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:39:50,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-11-20 11:39:50,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:50,163 INFO L225 Difference]: With dead ends: 122 [2022-11-20 11:39:50,164 INFO L226 Difference]: Without dead ends: 122 [2022-11-20 11:39:50,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:39:50,165 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 214 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:50,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 142 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:39:50,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-20 11:39:50,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-11-20 11:39:50,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 68 states have (on average 1.8088235294117647) internal successors, (123), 117 states have internal predecessors, (123), 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) [2022-11-20 11:39:50,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 129 transitions. [2022-11-20 11:39:50,169 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 129 transitions. Word has length 41 [2022-11-20 11:39:50,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:50,169 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 129 transitions. [2022-11-20 11:39:50,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:39:50,170 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 129 transitions. [2022-11-20 11:39:50,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 11:39:50,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:50,171 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:50,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:50,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:50,377 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:39:50,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:50,377 INFO L85 PathProgramCache]: Analyzing trace with hash -566913869, now seen corresponding path program 1 times [2022-11-20 11:39:50,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:50,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063333529] [2022-11-20 11:39:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:50,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:50,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:39:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:50,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:39:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:50,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-20 11:39:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:39:50,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:50,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063333529] [2022-11-20 11:39:50,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063333529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:50,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473682439] [2022-11-20 11:39:50,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:50,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:50,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:50,974 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:50,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:39:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:51,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:39:51,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:51,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:39:51,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 11:39:51,281 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1582 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_1582))))) is different from true [2022-11-20 11:39:51,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:39:51,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:39:51,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 11:39:51,391 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2022-11-20 11:39:51,422 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 11:39:51,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:39:51,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 11:39:51,519 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1584 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_1584))))) is different from true [2022-11-20 11:39:51,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:39:51,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:39:51,574 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 21 not checked. [2022-11-20 11:39:51,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:51,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473682439] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:51,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:39:51,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2022-11-20 11:39:51,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542116775] [2022-11-20 11:39:51,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:51,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 11:39:51,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:51,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 11:39:51,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=125, Unknown=3, NotChecked=72, Total=240 [2022-11-20 11:39:51,647 INFO L87 Difference]: Start difference. First operand 122 states and 129 transitions. Second operand has 15 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-20 11:39:52,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:52,362 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2022-11-20 11:39:52,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:39:52,363 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2022-11-20 11:39:52,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:52,364 INFO L225 Difference]: With dead ends: 133 [2022-11-20 11:39:52,364 INFO L226 Difference]: Without dead ends: 133 [2022-11-20 11:39:52,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=218, Unknown=3, NotChecked=96, Total=380 [2022-11-20 11:39:52,366 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 144 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 401 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:52,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 507 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 590 Invalid, 0 Unknown, 401 Unchecked, 0.5s Time] [2022-11-20 11:39:52,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-20 11:39:52,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 115. [2022-11-20 11:39:52,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 68 states have (on average 1.7058823529411764) internal successors, (116), 110 states have internal predecessors, (116), 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) [2022-11-20 11:39:52,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 122 transitions. [2022-11-20 11:39:52,370 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 122 transitions. Word has length 43 [2022-11-20 11:39:52,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:52,371 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 122 transitions. [2022-11-20 11:39:52,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-20 11:39:52,371 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 122 transitions. [2022-11-20 11:39:52,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 11:39:52,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:52,372 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:52,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 11:39:52,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 11:39:52,583 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:39:52,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:52,583 INFO L85 PathProgramCache]: Analyzing trace with hash -566913868, now seen corresponding path program 1 times [2022-11-20 11:39:52,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:52,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505039374] [2022-11-20 11:39:52,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:52,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:53,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:39:53,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:53,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:39:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:53,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-20 11:39:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:39:53,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:53,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505039374] [2022-11-20 11:39:53,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505039374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:53,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760829897] [2022-11-20 11:39:53,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:53,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:53,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:53,325 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:53,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:39:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:53,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:39:53,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:53,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:39:53,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 11:39:53,698 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1821 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1821) |c_#length|)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-11-20 11:39:53,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:39:53,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:39:53,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 11:39:53,822 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1822 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1822))))) is different from true [2022-11-20 11:39:53,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:39:53,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:39:53,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 11:39:53,963 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1823 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1823) |c_#length|)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-11-20 11:39:54,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:39:54,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:39:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 21 not checked. [2022-11-20 11:39:54,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:54,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760829897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:54,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:39:54,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2022-11-20 11:39:54,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469210301] [2022-11-20 11:39:54,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:54,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 11:39:54,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:54,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 11:39:54,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=147, Unknown=3, NotChecked=78, Total=272 [2022-11-20 11:39:54,144 INFO L87 Difference]: Start difference. First operand 115 states and 122 transitions. Second operand has 15 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-20 11:39:54,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:54,764 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2022-11-20 11:39:54,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:39:54,764 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2022-11-20 11:39:54,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:54,766 INFO L225 Difference]: With dead ends: 125 [2022-11-20 11:39:54,766 INFO L226 Difference]: Without dead ends: 125 [2022-11-20 11:39:54,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=215, Unknown=3, NotChecked=96, Total=380 [2022-11-20 11:39:54,767 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 271 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 378 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:54,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 258 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 421 Invalid, 0 Unknown, 378 Unchecked, 0.5s Time] [2022-11-20 11:39:54,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-20 11:39:54,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 107. [2022-11-20 11:39:54,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 68 states have (on average 1.588235294117647) internal successors, (108), 102 states have internal predecessors, (108), 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) [2022-11-20 11:39:54,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2022-11-20 11:39:54,771 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 43 [2022-11-20 11:39:54,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:54,771 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2022-11-20 11:39:54,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-20 11:39:54,771 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2022-11-20 11:39:54,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 11:39:54,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:54,772 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:54,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:54,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 11:39:54,973 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:39:54,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:54,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1119645598, now seen corresponding path program 1 times [2022-11-20 11:39:54,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:54,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802555871] [2022-11-20 11:39:54,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:54,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:55,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:55,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:39:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:55,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:39:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:55,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-20 11:39:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:55,193 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:39:55,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:55,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802555871] [2022-11-20 11:39:55,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802555871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:55,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:55,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:39:55,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416977774] [2022-11-20 11:39:55,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:55,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:39:55,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:55,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:39:55,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:39:55,197 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 11:39:55,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:55,465 INFO L93 Difference]: Finished difference Result 121 states and 129 transitions. [2022-11-20 11:39:55,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:39:55,465 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2022-11-20 11:39:55,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:55,466 INFO L225 Difference]: With dead ends: 121 [2022-11-20 11:39:55,466 INFO L226 Difference]: Without dead ends: 121 [2022-11-20 11:39:55,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:39:55,467 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 78 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:55,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 282 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:39:55,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-20 11:39:55,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2022-11-20 11:39:55,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 68 states have (on average 1.5294117647058822) internal successors, (104), 98 states have internal predecessors, (104), 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) [2022-11-20 11:39:55,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2022-11-20 11:39:55,471 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 46 [2022-11-20 11:39:55,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:55,471 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2022-11-20 11:39:55,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 11:39:55,472 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2022-11-20 11:39:55,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 11:39:55,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:55,473 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:55,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 11:39:55,473 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:39:55,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:55,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1119645597, now seen corresponding path program 1 times [2022-11-20 11:39:55,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:55,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979179961] [2022-11-20 11:39:55,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:55,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:55,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:55,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:39:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:55,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:39:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:55,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-20 11:39:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:55,820 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:39:55,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:55,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979179961] [2022-11-20 11:39:55,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979179961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:55,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:55,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:39:55,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193714162] [2022-11-20 11:39:55,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:55,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:39:55,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:55,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:39:55,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:39:55,824 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 11:39:56,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:56,058 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2022-11-20 11:39:56,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:39:56,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2022-11-20 11:39:56,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:56,059 INFO L225 Difference]: With dead ends: 99 [2022-11-20 11:39:56,060 INFO L226 Difference]: Without dead ends: 99 [2022-11-20 11:39:56,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:39:56,060 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 77 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:56,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 297 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:39:56,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-20 11:39:56,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-11-20 11:39:56,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 68 states have (on average 1.4705882352941178) internal successors, (100), 94 states have internal predecessors, (100), 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) [2022-11-20 11:39:56,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2022-11-20 11:39:56,064 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 46 [2022-11-20 11:39:56,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:56,064 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2022-11-20 11:39:56,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 11:39:56,064 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2022-11-20 11:39:56,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 11:39:56,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:56,065 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:56,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 11:39:56,065 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:39:56,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:56,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1119634675, now seen corresponding path program 1 times [2022-11-20 11:39:56,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:56,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254180076] [2022-11-20 11:39:56,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:56,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:56,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:39:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:56,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:39:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:56,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-20 11:39:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:56,932 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:39:56,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:56,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254180076] [2022-11-20 11:39:56,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254180076] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:56,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893929028] [2022-11-20 11:39:56,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:56,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:56,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:56,935 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:56,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:39:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:57,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-20 11:39:57,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:57,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:39:57,461 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 5 [2022-11-20 11:39:57,645 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_2367 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2367))) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1)))) is different from true [2022-11-20 11:39:57,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:39:57,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:39:57,691 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-20 11:39:57,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:39:57,782 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 9 [2022-11-20 11:39:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2022-11-20 11:39:57,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:57,862 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_48| Int) (v_ArrVal_2373 (Array Int Int))) (or (= (select (store |c_#valid| |v_node_create_~temp~0#1.base_48| 1) (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_48| v_ArrVal_2373) |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) 1) (not (< |v_node_create_~temp~0#1.base_48| |c_#StackHeapBarrier|)))) is different from false [2022-11-20 11:39:57,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893929028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:57,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:39:57,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2022-11-20 11:39:57,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319246481] [2022-11-20 11:39:57,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:57,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 11:39:57,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:57,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 11:39:57,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=573, Unknown=3, NotChecked=98, Total=756 [2022-11-20 11:39:57,865 INFO L87 Difference]: Start difference. First operand 99 states and 106 transitions. Second operand has 27 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 11:39:58,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:58,553 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2022-11-20 11:39:58,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:39:58,554 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2022-11-20 11:39:58,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:58,555 INFO L225 Difference]: With dead ends: 98 [2022-11-20 11:39:58,555 INFO L226 Difference]: Without dead ends: 98 [2022-11-20 11:39:58,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=862, Unknown=5, NotChecked=122, Total=1122 [2022-11-20 11:39:58,556 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 30 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:58,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 562 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 454 Invalid, 0 Unknown, 154 Unchecked, 0.4s Time] [2022-11-20 11:39:58,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-20 11:39:58,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-11-20 11:39:58,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 68 states have (on average 1.4558823529411764) internal successors, (99), 93 states have internal predecessors, (99), 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) [2022-11-20 11:39:58,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2022-11-20 11:39:58,561 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 46 [2022-11-20 11:39:58,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:58,561 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2022-11-20 11:39:58,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 11:39:58,562 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2022-11-20 11:39:58,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 11:39:58,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:58,562 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:58,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:58,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 11:39:58,769 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:39:58,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:58,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1119634674, now seen corresponding path program 1 times [2022-11-20 11:39:58,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:58,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341115295] [2022-11-20 11:39:58,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:58,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:59,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:39:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:59,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:39:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:59,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-20 11:39:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:40:00,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:40:00,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341115295] [2022-11-20 11:40:00,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341115295] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:40:00,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107476794] [2022-11-20 11:40:00,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:40:00,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:40:00,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:40:00,523 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:40:00,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:40:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:00,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-20 11:40:00,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:40:00,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:40:01,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 11:40:01,423 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 3 [2022-11-20 11:40:01,717 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_2607 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_2607) |c_#length|)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (exists ((v_ArrVal_2612 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_2612))) (exists ((v_ArrVal_2613 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2613))))) is different from true [2022-11-20 11:40:01,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:01,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:40:01,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:01,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 11:40:01,799 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-20 11:40:01,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 11:40:01,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:01,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:40:01,888 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 7 [2022-11-20 11:40:01,890 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 9 [2022-11-20 11:40:01,937 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2022-11-20 11:40:01,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:40:03,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107476794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:40:03,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:40:03,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2022-11-20 11:40:03,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964917512] [2022-11-20 11:40:03,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:40:03,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 11:40:03,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:40:03,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 11:40:03,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=963, Unknown=2, NotChecked=62, Total=1122 [2022-11-20 11:40:03,092 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand has 31 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 11:40:04,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:40:04,927 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2022-11-20 11:40:04,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:40:04,928 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2022-11-20 11:40:04,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:40:04,929 INFO L225 Difference]: With dead ends: 97 [2022-11-20 11:40:04,929 INFO L226 Difference]: Without dead ends: 97 [2022-11-20 11:40:04,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=192, Invalid=1699, Unknown=5, NotChecked=84, Total=1980 [2022-11-20 11:40:04,931 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 49 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:40:04,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 856 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 722 Invalid, 0 Unknown, 198 Unchecked, 0.8s Time] [2022-11-20 11:40:04,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-20 11:40:04,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-11-20 11:40:04,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 68 states have (on average 1.4411764705882353) internal successors, (98), 92 states have internal predecessors, (98), 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) [2022-11-20 11:40:04,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2022-11-20 11:40:04,935 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 46 [2022-11-20 11:40:04,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:40:04,935 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2022-11-20 11:40:04,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 11:40:04,936 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2022-11-20 11:40:04,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 11:40:04,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:40:04,937 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:40:04,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:40:05,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:40:05,144 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:40:05,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:40:05,145 INFO L85 PathProgramCache]: Analyzing trace with hash -645963432, now seen corresponding path program 1 times [2022-11-20 11:40:05,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:40:05,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584479661] [2022-11-20 11:40:05,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:40:05,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:40:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:05,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:40:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:05,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:40:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:05,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-20 11:40:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:05,370 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 11:40:05,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:40:05,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584479661] [2022-11-20 11:40:05,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584479661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:40:05,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:40:05,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:40:05,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11836749] [2022-11-20 11:40:05,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:40:05,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:40:05,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:40:05,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:40:05,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:40:05,384 INFO L87 Difference]: Start difference. First operand 97 states and 104 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:40:05,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:40:05,525 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2022-11-20 11:40:05,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:40:05,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-11-20 11:40:05,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:40:05,527 INFO L225 Difference]: With dead ends: 114 [2022-11-20 11:40:05,527 INFO L226 Difference]: Without dead ends: 114 [2022-11-20 11:40:05,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:40:05,528 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 226 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:40:05,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 163 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:40:05,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-20 11:40:05,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 96. [2022-11-20 11:40:05,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 91 states have internal predecessors, (97), 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) [2022-11-20 11:40:05,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2022-11-20 11:40:05,531 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 49 [2022-11-20 11:40:05,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:40:05,531 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2022-11-20 11:40:05,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:40:05,532 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2022-11-20 11:40:05,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 11:40:05,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:40:05,532 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:40:05,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-20 11:40:05,533 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:40:05,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:40:05,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1999401721, now seen corresponding path program 1 times [2022-11-20 11:40:05,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:40:05,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170916851] [2022-11-20 11:40:05,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:40:05,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:40:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:05,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:40:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:06,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:40:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:06,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-20 11:40:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:40:06,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:40:06,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170916851] [2022-11-20 11:40:06,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170916851] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:40:06,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376795934] [2022-11-20 11:40:06,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:40:06,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:40:06,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:40:06,298 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:40:06,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:40:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:06,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:40:06,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:40:06,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:40:06,978 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:40:07,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:07,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:40:07,063 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 11:40:07,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-20 11:40:07,115 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 14 [2022-11-20 11:40:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:40:07,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:40:07,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376795934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:40:07,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:40:07,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [16] total 26 [2022-11-20 11:40:07,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117192202] [2022-11-20 11:40:07,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:40:07,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:40:07,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:40:07,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:40:07,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:40:07,177 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 12 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:40:07,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:40:07,775 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2022-11-20 11:40:07,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:40:07,776 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-11-20 11:40:07,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:40:07,777 INFO L225 Difference]: With dead ends: 113 [2022-11-20 11:40:07,777 INFO L226 Difference]: Without dead ends: 113 [2022-11-20 11:40:07,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-11-20 11:40:07,778 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 224 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:40:07,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 329 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:40:07,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-20 11:40:07,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 93. [2022-11-20 11:40:07,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.3823529411764706) internal successors, (94), 88 states have internal predecessors, (94), 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) [2022-11-20 11:40:07,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2022-11-20 11:40:07,782 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 51 [2022-11-20 11:40:07,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:40:07,782 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2022-11-20 11:40:07,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:40:07,783 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2022-11-20 11:40:07,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 11:40:07,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:40:07,784 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:40:07,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:40:07,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:40:07,984 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:40:07,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:40:07,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1999401722, now seen corresponding path program 1 times [2022-11-20 11:40:07,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:40:07,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848406266] [2022-11-20 11:40:07,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:40:07,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:40:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:08,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:40:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:08,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:40:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:08,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-20 11:40:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:40:08,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:40:08,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848406266] [2022-11-20 11:40:08,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848406266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:40:08,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387262361] [2022-11-20 11:40:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:40:08,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:40:08,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:40:08,694 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:40:08,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:40:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:09,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:40:09,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:40:09,381 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 9 [2022-11-20 11:40:09,486 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_3334 (Array Int Int))) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_3334) |c_#memory_$Pointer$.base|))) is different from true [2022-11-20 11:40:09,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:09,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-20 11:40:09,556 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 13 [2022-11-20 11:40:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2022-11-20 11:40:09,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:40:09,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387262361] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:40:09,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:40:09,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2022-11-20 11:40:09,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956285858] [2022-11-20 11:40:09,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:40:09,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 11:40:09,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:40:09,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 11:40:09,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=613, Unknown=6, NotChecked=50, Total=756 [2022-11-20 11:40:09,756 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 22 states have internal predecessors, (67), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 11:40:10,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:40:10,544 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2022-11-20 11:40:10,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:40:10,546 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 22 states have internal predecessors, (67), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2022-11-20 11:40:10,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:40:10,547 INFO L225 Difference]: With dead ends: 90 [2022-11-20 11:40:10,547 INFO L226 Difference]: Without dead ends: 90 [2022-11-20 11:40:10,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=165, Invalid=955, Unknown=6, NotChecked=64, Total=1190 [2022-11-20 11:40:10,548 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 381 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:40:10,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 653 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 440 Invalid, 0 Unknown, 93 Unchecked, 0.4s Time] [2022-11-20 11:40:10,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-20 11:40:10,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-11-20 11:40:10,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 65 states have (on average 1.3846153846153846) internal successors, (90), 85 states have internal predecessors, (90), 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) [2022-11-20 11:40:10,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2022-11-20 11:40:10,551 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 51 [2022-11-20 11:40:10,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:40:10,551 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2022-11-20 11:40:10,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 22 states have internal predecessors, (67), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 11:40:10,552 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2022-11-20 11:40:10,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 11:40:10,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:40:10,552 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:40:10,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:40:10,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:40:10,760 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:40:10,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:40:10,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1685641326, now seen corresponding path program 1 times [2022-11-20 11:40:10,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:40:10,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057237357] [2022-11-20 11:40:10,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:40:10,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:40:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:10,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:40:10,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:10,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:40:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:10,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-20 11:40:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 11:40:10,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:40:10,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057237357] [2022-11-20 11:40:10,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057237357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:40:10,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:40:10,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:40:10,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943786286] [2022-11-20 11:40:10,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:40:10,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:40:10,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:40:10,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:40:10,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:40:10,949 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 11:40:11,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:40:11,163 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2022-11-20 11:40:11,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:40:11,163 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-11-20 11:40:11,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:40:11,164 INFO L225 Difference]: With dead ends: 107 [2022-11-20 11:40:11,164 INFO L226 Difference]: Without dead ends: 107 [2022-11-20 11:40:11,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:40:11,165 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 57 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:40:11,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 305 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:40:11,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-20 11:40:11,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2022-11-20 11:40:11,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 65 states have (on average 1.3692307692307693) internal successors, (89), 84 states have internal predecessors, (89), 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) [2022-11-20 11:40:11,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2022-11-20 11:40:11,169 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 52 [2022-11-20 11:40:11,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:40:11,170 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2022-11-20 11:40:11,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 11:40:11,170 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2022-11-20 11:40:11,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 11:40:11,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:40:11,171 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:40:11,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-20 11:40:11,171 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:40:11,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:40:11,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1685641325, now seen corresponding path program 1 times [2022-11-20 11:40:11,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:40:11,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720931475] [2022-11-20 11:40:11,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:40:11,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:40:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:11,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:40:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:11,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:40:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:11,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-20 11:40:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 11:40:11,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:40:11,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720931475] [2022-11-20 11:40:11,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720931475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:40:11,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:40:11,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:40:11,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115836551] [2022-11-20 11:40:11,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:40:11,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:40:11,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:40:11,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:40:11,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:40:11,457 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 11:40:11,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:40:11,690 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2022-11-20 11:40:11,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:40:11,690 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-11-20 11:40:11,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:40:11,691 INFO L225 Difference]: With dead ends: 88 [2022-11-20 11:40:11,691 INFO L226 Difference]: Without dead ends: 88 [2022-11-20 11:40:11,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:40:11,692 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 60 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:40:11,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 303 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:40:11,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-20 11:40:11,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-11-20 11:40:11,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.353846153846154) internal successors, (88), 83 states have internal predecessors, (88), 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) [2022-11-20 11:40:11,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2022-11-20 11:40:11,696 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 52 [2022-11-20 11:40:11,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:40:11,697 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2022-11-20 11:40:11,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 11:40:11,698 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2022-11-20 11:40:11,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 11:40:11,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:40:11,699 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:40:11,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-20 11:40:11,699 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:40:11,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:40:11,700 INFO L85 PathProgramCache]: Analyzing trace with hash -715273504, now seen corresponding path program 1 times [2022-11-20 11:40:11,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:40:11,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912049647] [2022-11-20 11:40:11,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:40:11,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:40:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:12,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:40:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:12,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:40:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:12,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-20 11:40:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:13,850 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:40:13,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:40:13,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912049647] [2022-11-20 11:40:13,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912049647] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:40:13,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222912334] [2022-11-20 11:40:13,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:40:13,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:40:13,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:40:13,852 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:40:13,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:40:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:14,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-20 11:40:14,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:40:14,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:40:14,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:40:14,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:40:14,740 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 32 [2022-11-20 11:40:14,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-11-20 11:40:14,756 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 11:40:14,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:40:15,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:15,164 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-20 11:40:15,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2022-11-20 11:40:15,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:15,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-20 11:40:15,209 INFO L321 Elim1Store]: treesize reduction 120, result has 31.4 percent of original size [2022-11-20 11:40:15,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 64 [2022-11-20 11:40:15,351 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 19 [2022-11-20 11:40:15,591 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:40:15,592 INFO L350 Elim1Store]: Elim1 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 45 treesize of output 34 [2022-11-20 11:40:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:40:15,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:40:15,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222912334] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:40:15,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:40:15,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 38 [2022-11-20 11:40:15,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544446898] [2022-11-20 11:40:15,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:40:15,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-20 11:40:15,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:40:15,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-20 11:40:15,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1593, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 11:40:16,000 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 39 states, 36 states have (on average 2.138888888888889) internal successors, (77), 34 states have internal predecessors, (77), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 11:40:18,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:40:18,073 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2022-11-20 11:40:18,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:40:18,073 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 2.138888888888889) internal successors, (77), 34 states have internal predecessors, (77), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 53 [2022-11-20 11:40:18,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:40:18,074 INFO L225 Difference]: With dead ends: 105 [2022-11-20 11:40:18,074 INFO L226 Difference]: Without dead ends: 105 [2022-11-20 11:40:18,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=324, Invalid=2756, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 11:40:18,076 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 164 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:40:18,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 815 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 983 Invalid, 0 Unknown, 72 Unchecked, 1.0s Time] [2022-11-20 11:40:18,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-20 11:40:18,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2022-11-20 11:40:18,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 82 states have internal predecessors, (87), 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) [2022-11-20 11:40:18,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2022-11-20 11:40:18,079 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 53 [2022-11-20 11:40:18,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:40:18,080 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2022-11-20 11:40:18,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 2.138888888888889) internal successors, (77), 34 states have internal predecessors, (77), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 11:40:18,080 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2022-11-20 11:40:18,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 11:40:18,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:40:18,081 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:40:18,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 11:40:18,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 11:40:18,288 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:40:18,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:40:18,288 INFO L85 PathProgramCache]: Analyzing trace with hash -715273503, now seen corresponding path program 1 times [2022-11-20 11:40:18,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:40:18,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813793884] [2022-11-20 11:40:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:40:18,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:40:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:20,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:40:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:20,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:40:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:20,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-20 11:40:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:40:21,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:40:21,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813793884] [2022-11-20 11:40:21,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813793884] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:40:21,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441991823] [2022-11-20 11:40:21,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:40:21,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:40:21,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:40:21,792 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:40:21,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 11:40:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:22,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-20 11:40:22,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:40:22,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:40:22,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:40:22,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:40:23,088 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-11-20 11:40:23,089 INFO L350 Elim1Store]: Elim1 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 81 treesize of output 44 [2022-11-20 11:40:23,107 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-20 11:40:23,108 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 25 [2022-11-20 11:40:23,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 11:40:23,126 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 11:40:23,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:40:23,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:23,695 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-20 11:40:23,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 83 [2022-11-20 11:40:23,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:23,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:23,710 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-20 11:40:23,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 71 [2022-11-20 11:40:23,730 INFO L321 Elim1Store]: treesize reduction 39, result has 48.7 percent of original size [2022-11-20 11:40:23,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 62 [2022-11-20 11:40:23,762 INFO L321 Elim1Store]: treesize reduction 34, result has 44.3 percent of original size [2022-11-20 11:40:23,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-11-20 11:40:24,084 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-11-20 11:40:24,085 INFO L350 Elim1Store]: Elim1 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 87 treesize of output 50 [2022-11-20 11:40:24,097 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-20 11:40:24,097 INFO L350 Elim1Store]: Elim1 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 44 treesize of output 28 [2022-11-20 11:40:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:40:24,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:40:24,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441991823] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:40:24,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:40:24,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 46 [2022-11-20 11:40:24,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155641166] [2022-11-20 11:40:24,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:40:24,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 11:40:24,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:40:24,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 11:40:24,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2489, Unknown=1, NotChecked=0, Total=2652 [2022-11-20 11:40:24,908 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 47 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 41 states have internal predecessors, (93), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 11:40:27,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:40:27,838 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2022-11-20 11:40:27,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:40:27,838 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 41 states have internal predecessors, (93), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2022-11-20 11:40:27,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:40:27,839 INFO L225 Difference]: With dead ends: 86 [2022-11-20 11:40:27,839 INFO L226 Difference]: Without dead ends: 86 [2022-11-20 11:40:27,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=323, Invalid=4098, Unknown=1, NotChecked=0, Total=4422 [2022-11-20 11:40:27,841 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 120 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 1582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:40:27,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 1112 Invalid, 1582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1375 Invalid, 0 Unknown, 189 Unchecked, 1.3s Time] [2022-11-20 11:40:27,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-20 11:40:27,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-11-20 11:40:27,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 65 states have (on average 1.323076923076923) internal successors, (86), 81 states have internal predecessors, (86), 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) [2022-11-20 11:40:27,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2022-11-20 11:40:27,846 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 53 [2022-11-20 11:40:27,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:40:27,846 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2022-11-20 11:40:27,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 41 states have internal predecessors, (93), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 11:40:27,847 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2022-11-20 11:40:27,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-20 11:40:27,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:40:27,848 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:40:27,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 11:40:28,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 11:40:28,056 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:40:28,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:40:28,056 INFO L85 PathProgramCache]: Analyzing trace with hash 821274968, now seen corresponding path program 1 times [2022-11-20 11:40:28,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:40:28,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036272311] [2022-11-20 11:40:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:40:28,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:40:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:29,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:40:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:29,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:40:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:29,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-20 11:40:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:30,247 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:40:30,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:40:30,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036272311] [2022-11-20 11:40:30,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036272311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:40:30,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:40:30,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-11-20 11:40:30,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434978851] [2022-11-20 11:40:30,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:40:30,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 11:40:30,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:40:30,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 11:40:30,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:40:30,250 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:40:31,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:40:31,796 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2022-11-20 11:40:31,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 11:40:31,797 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2022-11-20 11:40:31,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:40:31,798 INFO L225 Difference]: With dead ends: 86 [2022-11-20 11:40:31,798 INFO L226 Difference]: Without dead ends: 86 [2022-11-20 11:40:31,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 11:40:31,799 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 467 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:40:31,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 494 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:40:31,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-20 11:40:31,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2022-11-20 11:40:31,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 79 states have internal predecessors, (84), 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) [2022-11-20 11:40:31,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2022-11-20 11:40:31,804 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 58 [2022-11-20 11:40:31,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:40:31,804 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2022-11-20 11:40:31,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:40:31,805 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2022-11-20 11:40:31,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 11:40:31,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:40:31,805 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:40:31,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-20 11:40:31,806 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-20 11:40:31,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:40:31,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1028736951, now seen corresponding path program 1 times [2022-11-20 11:40:31,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:40:31,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096375337] [2022-11-20 11:40:31,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:40:31,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:40:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:35,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:40:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:35,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:40:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:35,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-20 11:40:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:40:36,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:40:36,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096375337] [2022-11-20 11:40:36,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096375337] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:40:36,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990331701] [2022-11-20 11:40:36,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:40:36,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:40:36,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:40:36,786 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:40:36,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ce2bf-345a-4f9d-8bc3-576c330a2de7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 11:40:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:37,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 136 conjunts are in the unsatisfiable core [2022-11-20 11:40:37,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:40:37,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:40:37,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 11:40:37,425 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:40:37,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:40:37,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:40:38,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:40:38,408 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-11-20 11:40:38,409 INFO L350 Elim1Store]: Elim1 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 54 treesize of output 21 [2022-11-20 11:40:38,417 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 11:40:38,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:40:38,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:40:39,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:39,183 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-20 11:40:39,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 60 [2022-11-20 11:40:39,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:39,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 44 [2022-11-20 11:40:39,226 INFO L321 Elim1Store]: treesize reduction 34, result has 44.3 percent of original size [2022-11-20 11:40:39,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-11-20 11:40:40,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:40,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:40:40,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 49 [2022-11-20 11:40:40,767 INFO L321 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2022-11-20 11:40:40,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 43 [2022-11-20 11:40:40,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:40,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:40,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-11-20 11:40:40,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:40,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 11:40:41,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:41,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:40:41,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:41,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-20 11:40:41,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 11:40:41,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:40:41,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:41,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:40:41,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:40:41,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:40:41,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:40:41,605 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 11:40:41,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 63 [2022-11-20 11:40:41,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:41,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 34 [2022-11-20 11:40:41,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:41,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 11:40:41,801 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 18 [2022-11-20 11:40:41,811 INFO L350 Elim1Store]: Elim1 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 22 treesize of output 10 [2022-11-20 11:40:41,953 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 7 [2022-11-20 11:40:41,956 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:40:41,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:40:42,143 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4736 Int) (v_ArrVal_4735 (Array Int Int)) (v_ArrVal_4738 (Array Int Int))) (= |c_ULTIMATE.start_main_~uneq~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) (+ |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 4) v_ArrVal_4736)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_4738) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ 8 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_4735) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2022-11-20 11:40:42,155 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4736 Int) (v_ArrVal_4732 (Array Int Int)) (v_ArrVal_4733 (Array Int Int)) (v_ArrVal_4734 (Array Int Int)) (v_ArrVal_4735 (Array Int Int)) (v_ArrVal_4738 (Array Int Int))) (= |c_ULTIMATE.start_main_~uneq~0#1| (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_4734))) (store .cse0 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) (+ |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 4) v_ArrVal_4736))) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_4733) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_4738) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ 8 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_4732) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_4735) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2022-11-20 11:40:42,175 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4729 (Array Int Int)) (v_ArrVal_4736 Int) (v_ArrVal_4730 (Array Int Int)) (v_ArrVal_4731 (Array Int Int)) (v_ArrVal_4732 (Array Int Int)) (v_ArrVal_4733 (Array Int Int)) (v_ArrVal_4734 (Array Int Int)) (v_ArrVal_4735 (Array Int Int)) (v_ArrVal_4738 (Array Int Int))) (= |c_ULTIMATE.start_main_~uneq~0#1| (select (select (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base| v_ArrVal_4730) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_4734))) (store .cse0 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) (+ |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 4) v_ArrVal_4736))) (select (select (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base| v_ArrVal_4729) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_4733) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_4738) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base| v_ArrVal_4731) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_4732) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_4735) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8)))) is different from false [2022-11-20 11:40:45,334 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:40:45,335 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 250 [2022-11-20 11:40:45,421 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:40:45,423 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 4619116 treesize of output 4575526 [2022-11-20 11:40:47,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5791962 treesize of output 4868314 [2022-11-20 11:40:50,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4893658 treesize of output 4714458 [2022-11-20 11:40:53,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5260938 treesize of output 5140874 [2022-11-20 11:41:09,975 WARN L233 SmtUtils]: Spent 9.18s on a formula simplification. DAG size of input: 903 DAG size of output: 903 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-20 11:41:19,781 WARN L233 SmtUtils]: Spent 6.48s on a formula simplification. DAG size of input: 616 DAG size of output: 616 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-20 11:41:27,581 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification. DAG size of input: 614 DAG size of output: 614 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)